CN115419466B - Method, device and electronic equipment for early warning of initial roof pressure at working face - Google Patents
Method, device and electronic equipment for early warning of initial roof pressure at working face Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 53
- 239000003245 coal Substances 0.000 claims abstract description 140
- 239000002344 surface layer Substances 0.000 claims abstract description 29
- 238000012544 monitoring process Methods 0.000 claims description 25
- 238000005065 mining Methods 0.000 claims description 22
- 238000006073 displacement reaction Methods 0.000 claims description 18
- 238000011156 evaluation Methods 0.000 claims description 15
- 238000004590 computer program Methods 0.000 claims description 14
- 238000013459 approach Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 3
- 239000011435 rock Substances 0.000 abstract description 13
- 238000003825 pressing Methods 0.000 abstract description 12
- 238000010586 diagram Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 238000002591 computed tomography Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
- G01N23/046—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]
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Abstract
The invention provides a method and a device for early warning of initial pressure of a working face top plate and electronic equipment. The method comprises the steps of determining coal surface layer coal body fracture parameter increment and coal body internal fracture parameter increment in a target time interval, obtaining scoring values of all parameter increment based on early warning index scoring criteria, determining early warning index scoring criteria based on index early warning values corresponding to all parameter increment, determining primary pressure comprehensive prediction index based on the scoring values of all parameter increment and the highest standard scoring values corresponding to all parameter increment, and performing primary pressure early warning under the condition that the primary pressure comprehensive prediction index exceeds an index threshold value. The method, the device and the electronic equipment for early warning the initial pressing of the working face top plate realize early warning of the initial pressing of the working face top plate of the hard rock stratum, thereby effectively avoiding casualties caused by the initial pressing.
Description
Technical Field
The invention relates to the technical field of coal mine safety exploitation, in particular to a method and device for early warning of primary pressure coming of a working face roof and electronic equipment.
Background
The coal seam occurrence conditions in China are complex and various, and about 30% of coal mines with hard rock formations above the coal seam are formed. The hard roof working face has stronger mineral pressure displaying degree due to the characteristics of large roof thickness, high strength and strong integrity, and particularly during initial mining, even on the basis of roof blasting weakening, the roof can not timely collapse after stoping to form a large-area suspended roof, and when the suspended roof length reaches a certain degree, sudden collapse occurs to form hurricane, so that casualties and equipment damage accidents are caused, and the safe and efficient mining of the working face is seriously threatened. For example, after the working face of the hard rock stratum in the elm mine area in China is weakened by blasting the top plate, the primary pressing step distance of the top plate is more than 100m, the maximum pressing step distance is 150m, the hurricane phenomenon is obvious when the first pressing step is performed, and the personnel float half-empty during the hurricane and are blown out to be more than 3 m.
At present, two main types of pre-warning methods for the pressure of the top plate of the working face are adopted, namely (1) manual observation is adopted to pre-judge whether the top plate of the working face is pressed in the future or not according to the condition of the coal wall of the working face and the occurrence frequency of the top plate fracture. The initial compaction of the hard roof is often a sudden collapse, and the macroscopic appearance of the coal wall outside the ledge may not be obvious immediately before compaction, but the surface and internal fissures have been significantly changed. (2) The method is a data analysis judging method, can accurately judge whether the working face is currently pressed or not, but cannot realize early warning before the top plate is pressed.
In addition, a method for monitoring roof pressure and fracture by using a vibration acceleration sensor is provided, and the method aims to realize roof pressure monitoring by collecting and analyzing a vibration signal of a target rock stratum, in practice, during working face mining, the influence of disturbance such as the movement of a coal mining machine, a hydraulic support, a scraper conveyor and the like in the working face and the roof plate close to a goaf on the collection and analysis of the vibration signal is large, so that the method is greatly influenced by underground environment, and the judgment accuracy has a large error.
In summary, an accurate and effective early warning method for early warning of the initial pressing of the top plate of the hard rock stratum working surface is still lacking.
Disclosure of Invention
The invention provides a method and a device for early warning of primary pressing of a working face top plate and electronic equipment, which are used for solving the technical problem of low early warning accuracy of primary pressing of the working face top plate of a hard rock stratum in the prior art.
The invention provides a method for early warning of primary pressure coming of a working face top plate, which comprises the following steps:
determining the coal body fracture parameter increment of the surface layer of the coal wall and the coal body fracture parameter increment of the coal body in a target time interval;
Obtaining a scoring value of each parameter increment based on an early warning index scoring standard, wherein the early warning index scoring standard is determined based on an index early warning value corresponding to each parameter increment;
Determining a primary pressure comprehensive prediction index based on the grading value of each parameter increment and the highest standard grading value corresponding to each parameter increment;
And under the condition that the primary incoming pressure comprehensive prediction index exceeds an index threshold value, primary incoming pressure early warning is carried out.
In some embodiments, before the scoring value of each parameter increment is obtained based on the early warning indicator scoring standard, the method further includes:
Determining index early warning values corresponding to the parameter increments based on the coal wall surface coal body crack parameter increment and the coal body crack parameter increment in the period from initial mining to initial pressure of the adjacent working face in the target monitoring period;
setting standard grading values corresponding to the parameter increments based on the index early warning values corresponding to the parameter increments and the size of the parameter increments;
and constructing the early warning index scoring standard based on the standard scoring values corresponding to the parameter increments.
In some embodiments, before determining the coal wall surface layer coal body fracture parameter increment and the coal body internal fracture parameter increment within the target time interval, further comprises:
And carrying out coal wall surface layer crack scanning identification by adopting a three-dimensional laser scanner, and carrying out coal body internal crack change identification by adopting an electromagnetic wave CT system.
In some embodiments, the primary incoming call integrated prediction index is:
Wherein, W is the primary incoming pressure comprehensive prediction index, G i is the scoring value of the i-th evaluation index increment, G imax is the highest standard scoring value of the i-th evaluation index increment, and the evaluation index increment is used for indicating each parameter increment.
In some embodiments, the determining the primary incoming call comprehensive prediction index based on the score value of each parameter increment and the highest standard score value corresponding to each parameter increment includes:
Establishing a primary incoming pressure prediction window;
and determining the primary incoming call comprehensive prediction index based on the grading value of each parameter increment and the highest standard grading value corresponding to each parameter increment in any target time interval in the primary incoming call prediction window.
In some embodiments, the coal wall surface coal body fracture parameters include coal body horizontal displacement, coal body vertical displacement, fracture density, fracture spacing, and fracture width;
The fracture parameters in the coal body comprise electromagnetic wave attenuation coefficients.
The invention also provides a working face roof initial pressure coming early warning device, which comprises:
the first determining module is used for determining the coal body fracture parameter increment of the coal wall surface layer and the coal body internal fracture parameter increment in the target time interval;
The second determining module is used for obtaining the scoring value of each parameter increment based on the early warning index scoring standard, and the early warning index scoring standard is determined based on the index early warning value corresponding to each parameter increment;
the third determining module is used for determining a primary incoming pressure comprehensive prediction index based on the grading value of each parameter increment and the highest standard grading value corresponding to each parameter increment;
and the early warning module is used for carrying out initial incoming call early warning under the condition that the initial incoming call comprehensive prediction index exceeds an index threshold value.
The invention also provides electronic equipment, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor realizes the initial pressure coming early warning method of the working face top plate when executing the program.
The invention also provides a non-transitory computer readable storage medium, on which is stored a computer program which, when executed by a processor, implements a method of primary pressure warning of a working face roof as described in any of the above.
The invention also provides a computer program product, which comprises a computer program, wherein the computer program realizes the initial pressure warning method of the working surface top plate when being executed by a processor.
According to the method, the device and the electronic equipment for early warning of the primary pressure of the working face roof, disclosed by the invention, the early warning of the primary pressure of the working face roof of the hard rock stratum is realized through comprehensive monitoring and analysis of the surface layer of the coal wall and the crack change in the coal body before the primary pressure, errors caused by artificial factors and mining factors under conventional monitoring are avoided, and early warning of the primary pressure of the hard rock stratum can be rapidly and accurately realized in an underground mining environment, so that casualties caused by the primary pressure can be effectively avoided.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a method for early warning of initial pressure of a working face roof provided by the invention;
FIG. 2 is a schematic diagram of monitoring cracks on the surface layer of a coal wall of a working face by applying the initial pressure warning method of the top plate of the working face;
FIG. 3 is a schematic diagram of monitoring cracks in a coal wall of a working face by applying the method for early warning of primary pressure of a top plate of the working face;
FIG. 4 is a schematic flow chart of a method for early warning of initial pressure of a working face roof by applying the method provided by the invention;
FIG. 5 is a schematic diagram of a construction of a device for early warning of initial pressure of a working face roof according to the present invention;
fig. 6 is a schematic diagram of the physical structure of the electronic device provided by the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, the execution main body of the working surface top plate initial pressure coming early warning method provided by the invention may be an electronic device, a component in the electronic device, an integrated circuit or a chip. The electronic device may be a mobile electronic device or a non-mobile electronic device. By way of example, the mobile electronic device may be a cell phone, tablet computer, notebook computer, palm computer, vehicle-mounted electronic device, wearable device, ultra-mobile personal computer (UMPC), netbook or Personal Digital Assistant (PDA), etc., and the non-mobile electronic device may be a server, network attached storage (Network Attached Storage, NAS), personal computer (personal computer, PC), television (TV), teller machine or self-service machine, etc., and the invention is not limited in particular.
The technical scheme of the invention is described in detail below by taking a computer to execute the method for early warning the initial pressure of the working face top plate.
Fig. 1 is a schematic flow chart of a method for early warning of initial pressure of a working face roof. Referring to fig. 1, the method for early warning the initial pressing of the working surface top plate provided by the invention comprises the steps of 110, 120, 130 and 140.
Step 110, determining the coal body fracture parameter increment of the surface layer of the coal wall and the coal body fracture parameter increment of the coal body in the target time interval.
And 120, obtaining the grading value of each parameter increment based on the early warning index grading standard, wherein the early warning index grading standard is determined based on the index early warning value corresponding to each parameter increment.
And 130, determining a primary pressure comprehensive prediction index based on the grading value of each parameter increment and the highest standard grading value corresponding to each parameter increment.
And 140, performing primary incoming call early warning under the condition that the primary incoming call comprehensive prediction index exceeds an index threshold value.
The target time interval is a certain time interval in the early warning monitoring period.
In some embodiments, prior to step 110, further comprising:
And carrying out coal wall surface layer crack scanning identification by adopting a three-dimensional laser scanner, and carrying out coal body internal crack change identification by adopting an electromagnetic wave CT system.
In step 110, as shown in fig. 2 and 3, a three-dimensional laser scanner and a high-frequency electromagnetic wave computed tomography (CT, computed Tomography) system are installed on the working surface to be pre-warned, for collecting the fracture change data of the surface layer of the coal wall and the inside of the coal body before the initial pressure.
Based on the data collected by the three-dimensional laser scanner and the high-frequency electromagnetic wave computer CT system, the coal body fracture parameter increment and the coal body fracture parameter increment of the surface layer of the coal wall in the target time interval can be determined.
The coal body fracture parameter increment mainly comprises a coal body horizontal displacement increment DeltaS h, a coal body vertical displacement increment DeltaS v, a fracture density increment DeltaA fd, a fracture spacing increment DeltaL and a fracture width increment DeltaH. The internal fracture parameter increment of the coal body mainly comprises an electromagnetic wave attenuation coefficient delta beta.
In step 120, the early warning indicator scoring criteria is determined based on the indicator early warning values corresponding to the parameter increments, and is used to indicate the correspondence between the parameter increments and the standard scoring values. Each parameter increment may set a different standard score value according to a judgment condition set based on the index early-warning value.
In actual implementation, the scoring value of each parameter increment can be directly obtained according to the scoring standard of the early warning index.
In step 130, a primary pressure comprehensive prediction index is calculated based on the score value of each parameter increment in the target time interval during the early warning monitoring period and the highest standard score value corresponding to each parameter increment.
In some embodiments, determining the primary running total prediction index based on the scoring value for each parameter increment and the highest standard scoring value for each parameter increment includes:
Establishing a primary incoming pressure prediction window;
And determining a primary incoming call comprehensive prediction index based on the grading value of each parameter increment and the highest standard grading value corresponding to each parameter increment in any target time interval in the primary incoming call prediction window.
The exponent threshold may be defined according to actual requirements, and is not specifically defined herein.
In actual execution, a primary pressure prediction window is established, and a primary pressure comprehensive prediction index in any target time interval in the primary pressure prediction window is calculated.
In some embodiments, the primary incoming call integrated prediction index is:
wherein, W is the primary incoming pressure comprehensive prediction index, G i is the grading value of the ith evaluation index increment, G imax is the highest standard grading value of the ith evaluation index increment, and the evaluation index increment is used for indicating each parameter increment.
The highest standard grading value is the maximum grading value corresponding to the evaluation index increment in the early warning index grading standard.
It should be noted that 6 index increments are provided in the embodiment of the present invention, which is used as an example only and is not limited thereto.
In this embodiment, the index threshold is 0.6, and when the primary incoming pressure comprehensive prediction index W in the primary incoming pressure prediction window is greater than or equal to 0.6, early warning is performed, and when W is less than 0.6, the above steps are cycled to predict the next target time interval.
The method for early warning the primary pressure of the working face roof provided by the invention realizes the early warning of the primary pressure of the working face roof of the hard rock stratum by comprehensively monitoring and analyzing the surface layer of the coal wall and the crack change in the coal body before the primary pressure, avoids errors caused by artificial factors and mining factors under conventional monitoring, and can rapidly and accurately realize the early warning of the primary pressure of the hard rock stratum in the underground mining environment, thereby effectively avoiding casualties caused by the primary pressure.
In some embodiments, before deriving the scoring value for each parameter increment based on the pre-warning indicator scoring criteria, further comprising:
determining index early warning values corresponding to all parameter increments based on the coal wall surface coal body fracture parameter increments and the coal body fracture parameter increments in the period from initial mining to initial pressure starting of the adjacent working surfaces in the target monitoring period;
setting standard grading values corresponding to the parameter increments based on the index early warning values corresponding to the parameter increments and the sizes of the parameter increments;
and constructing early warning index scoring standards based on the standard scoring values corresponding to the parameter increments.
The target monitoring time period may be any period corresponding to a period from initial mining to initial pressure of the adjacent working face selected in the history monitoring period.
In actual execution, a three-dimensional laser scanner arranged above the support top beam can be adopted to perform coal wall surface layer fracture scanning identification during the period from initial mining to initial pressure of the adjacent working face in the target monitoring period.
So as to acquire the coal body fracture parameters of the surface layer of the coal wall in the whole process from the initial mining of the adjacent working face to the initial pressure, wherein the coal body fracture parameters mainly comprise the coal body horizontal displacement S h, the coal body vertical displacement S v, the fracture density A fd, the fracture spacing L and the fracture width H.
Analyzing the characteristic of the change of the coal body fracture parameter of the surface layer of the coal wall of the working face close to the first pressure in the target monitoring period, and extracting the increment of the coal body fracture parameter in the target time interval.
For example, the increment of the coal body fracture parameter in the Δt interval time before the initial pressure is T minutes in the target monitoring time period of the middle area of the extraction working surface is DeltaS h、△Sv、△Afd, deltaL and DeltaH respectively.
In actual execution, during the period from initial mining to initial pressure of the adjacent working face in the target monitoring period, an electromagnetic wave computer tomography (CT, computed Tomography) system installed inside the coal body of the working face is adopted to identify the crack change in the coal body.
Therefore, the fracture parameters in the coal body in the whole process from the initial mining of the adjacent working face to the initial pressure entering of the adjacent working face can be acquired in real time, and the fracture parameters in the coal body comprise the electromagnetic wave attenuation coefficient delta beta.
And analyzing the attenuation characteristics of electromagnetic waves in the coal body near the initial pressure, and determining the parameter increment of the fissure in the coal body in the whole process from the initial mining of the adjacent working face to the initial pressure.
For example, the attenuation coefficient Deltaβ of the electromagnetic wave inside the coal body in the Deltat interval time before the initial pressure is taken for T minutes in the target monitoring time period is extracted.
And determining index early warning values corresponding to all parameters of the initial roof pressure according to the coal body fracture parameter increment of the surface layer of the coal wall and the coal body fracture parameter increment of the coal body in the period from the initial mining of the adjacent working surface to the initial pressure in the target monitoring period determined in the embodiment.
It can be understood that each parameter corresponds to an index early warning value.
And setting standard grading values of the parameter increments based on the index early warning values corresponding to the parameters and the magnitude of the parameter increments of the initial pressure coming from the top plate, so that early warning index grading standards can be established. The scoring standard of the coal wall caving early warning index is shown in table 1.
In table 1, the evaluation index increment corresponds to each parameter increment, i.e., Δs h、△Sv、△Afd, Δl, Δh, Δβ. The index early warning value corresponding to each parameter increment comprises DeltaS hFZ、△SvFZ、△AfdFZ、△LFZ、△HFZ、△βFZ.
When the coal body horizontal displacement increment DeltaS h is smaller than the index early warning value DeltaS hFZ, the standard grading value of the coal body horizontal displacement increment DeltaS h is 0, and when the coal body horizontal displacement increment DeltaS h is larger than or equal to the index early warning value DeltaS hFZ, the standard grading value of the coal body horizontal displacement increment DeltaS h is 1.
When the coal body vertical displacement increment DeltaS v is smaller than the index early warning value DeltaS vFZ, the standard grading value of the coal body vertical displacement increment DeltaS v is 0, and when the coal body vertical displacement increment DeltaS v is larger than or equal to the index early warning value DeltaS vFZ, the standard grading value of the coal body vertical displacement increment DeltaS v is 1.
When the crack density increment DeltaA fd is smaller than the index early warning value DeltaA fdFZ, the standard grading value of the crack density increment DeltaA fd is 0, and when the crack density increment DeltaA fd is larger than or equal to the index early warning value DeltaA fdFZ, the standard grading value of the crack density increment DeltaA fd is 1.
The standard grading value of the crack spacing increment DeltaL is 0 when the crack spacing increment DeltaL is smaller than the index early warning value DeltaL FZ, and is 1 when the crack spacing increment DeltaL is larger than or equal to the index early warning value DeltaL FZ.
When the crack width increment DeltaH is smaller than the index early warning value DeltaH FZ, the standard grading value of the crack width increment DeltaH is 0, and when the crack width increment DeltaH is larger than or equal to the index early warning value DeltaH FZ, the standard grading value of the crack width increment DeltaH is 1.
The standard score value of the electromagnetic wave attenuation coefficient delta beta is 0 when the electromagnetic wave attenuation coefficient delta beta is smaller than the index early warning value delta beta FZ, and is 5 when the electromagnetic wave attenuation coefficient delta beta is larger than or equal to the index early warning value delta beta FZ.
TABLE 1
According to the working face roof initial pressure early warning method provided by the invention, the scientific evaluation method aiming at each parameter increment during the initial pressure of the working face roof is formed by constructing the early warning index scoring standard, so that intelligent scoring early warning is realized, and the early warning efficiency can be improved.
In some embodiments, the invention may provide a method for early warning of initial pressure of a hard formation face roof.
As shown in fig. 4, the method for early warning the initial pressure of the roof of the hard rock stratum working face provided by the invention can comprise the following steps:
1. Collecting the fracture change characteristics of the surface coal body of the coal wall before the initial pressure of the adjacent working face, and determining the external appearance increment value of the fracture parameters of the surface coal body of the coal wall before the initial pressure.
2. Collecting the change characteristics of the internal fissure of the coal body of the first time of the pressure-taking of the adjacent working face, and determining the value of the appearance increment of the internal fissure parameter of the coal body of the first time of the pressure-taking.
3. And determining early warning values of various indexes before the initial pressing of the top plate based on the increment values of the parameters.
4. And establishing a primary incoming pressure early warning index scoring standard, and determining a primary incoming pressure comprehensive prediction index of the top plate.
5. And establishing a prediction window, and performing primary incoming pressure prediction and early warning.
The working surface roof initial pressure warning device provided by the invention is described below, and the working surface roof initial pressure warning device described below and the working surface roof initial pressure warning method described above can be referred to correspondingly.
Fig. 5 is a schematic structural diagram of a working face roof initial pressure warning device provided by the invention. Referring to fig. 5, the working surface roof initial pressure early warning device provided by the invention comprises:
A first determining module 510, configured to determine a coal body fracture parameter increment of a coal wall surface layer and a coal body internal fracture parameter increment within a target time interval;
the second determining module 520 is configured to obtain a score value of each parameter increment based on an early warning indicator scoring criterion, where the early warning indicator scoring criterion is determined based on an indicator early warning value corresponding to each parameter increment;
A third determining module 530, configured to determine a primary incoming pressure comprehensive prediction index based on the score value of each parameter increment and the highest standard score value corresponding to each parameter increment;
And the early warning module 540 is used for carrying out initial incoming call early warning under the condition that the initial incoming call comprehensive prediction index exceeds an index threshold value.
The primary pressure-entering early warning device for the working face roof provided by the invention realizes the early warning of primary pressure entering of the hard rock stratum working face roof by comprehensively monitoring and analyzing the surface layer of the coal wall and the crack change in the coal body before primary pressure entering, avoids errors caused by artificial factors and mining factors under conventional monitoring, and can rapidly and accurately realize early warning of primary pressure entering of the hard rock stratum in the underground mining environment, thereby effectively avoiding casualties caused by primary pressure entering.
In some embodiments, the apparatus further comprises:
The fourth determining module is used for determining index early warning values corresponding to the parameter increments based on the coal wall surface layer coal body crack parameter increments and the coal body internal crack parameter increments in the period from initial mining to initial pressure starting of the adjacent working face in the target monitoring period;
the setting module is used for setting standard grading values corresponding to the parameter increments based on the index early warning values corresponding to the parameter increments and the sizes of the parameter increments;
and the construction module is used for constructing the early warning index scoring standard based on the standard scoring values corresponding to the parameter increments.
In some embodiments, the apparatus further comprises:
The identification module is used for carrying out coal wall surface layer crack scanning identification by adopting a three-dimensional laser scanner and carrying out coal body internal crack change identification by adopting an electromagnetic wave CT system.
In some embodiments, the primary incoming call integrated prediction index is:
Wherein, W is the primary incoming pressure comprehensive prediction index, G i is the scoring value of the i-th evaluation index increment, G imax is the highest standard scoring value of the i-th evaluation index increment, and the evaluation index increment is used for indicating each parameter increment.
In some embodiments, the third determining module 530 is further configured to:
Establishing a primary incoming pressure prediction window;
and determining the primary incoming call comprehensive prediction index based on the grading value of each parameter increment and the highest standard grading value corresponding to each parameter increment in any target time interval in the primary incoming call prediction window.
In some embodiments, the coal wall surface coal body fracture parameters include coal body horizontal displacement, coal body vertical displacement, fracture density, fracture spacing, and fracture width;
The fracture parameters in the coal body comprise electromagnetic wave attenuation coefficients.
Fig. 6 illustrates a physical schematic diagram of an electronic device, which may include a processor 610, a communication interface Communications Interface, a memory 630, and a communication bus 640, as shown in fig. 6, where the processor 610, the communication interface 620, and the memory 630 communicate with each other via the communication bus 640. The processor 610 may invoke logic instructions in the memory 630 to perform a face top initial approach warning method comprising:
determining the coal body fracture parameter increment of the surface layer of the coal wall and the coal body fracture parameter increment of the coal body in a target time interval;
Obtaining a scoring value of each parameter increment based on an early warning index scoring standard, wherein the early warning index scoring standard is determined based on an index early warning value corresponding to each parameter increment;
Determining a primary pressure comprehensive prediction index based on the grading value of each parameter increment and the highest standard grading value corresponding to each parameter increment;
And under the condition that the primary incoming pressure comprehensive prediction index exceeds an index threshold value, primary incoming pressure early warning is carried out.
Further, the logic instructions in the memory 630 may be implemented in the form of software functional units and stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. The storage medium includes a U disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, an optical disk, or other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product, where the computer program product includes a computer program, where the computer program can be stored on a non-transitory computer readable storage medium, and when the computer program is executed by a processor, the computer can execute a method for early warning of initial pressing of a working surface roof provided by the above methods, and the method includes:
determining the coal body fracture parameter increment of the surface layer of the coal wall and the coal body fracture parameter increment of the coal body in a target time interval;
Obtaining a scoring value of each parameter increment based on an early warning index scoring standard, wherein the early warning index scoring standard is determined based on an index early warning value corresponding to each parameter increment;
Determining a primary pressure comprehensive prediction index based on the grading value of each parameter increment and the highest standard grading value corresponding to each parameter increment;
And under the condition that the primary incoming pressure comprehensive prediction index exceeds an index threshold value, primary incoming pressure early warning is carried out.
In still another aspect, the present invention further provides a non-transitory computer readable storage medium having stored thereon a computer program, which when executed by a processor, is implemented to perform the method for initial approach warning of a working surface roof provided by the above methods, the method comprising:
determining the coal body fracture parameter increment of the surface layer of the coal wall and the coal body fracture parameter increment of the coal body in a target time interval;
Obtaining a scoring value of each parameter increment based on an early warning index scoring standard, wherein the early warning index scoring standard is determined based on an index early warning value corresponding to each parameter increment;
Determining a primary pressure comprehensive prediction index based on the grading value of each parameter increment and the highest standard grading value corresponding to each parameter increment;
And under the condition that the primary incoming pressure comprehensive prediction index exceeds an index threshold value, primary incoming pressure early warning is carried out.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
It should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present invention, and not for limiting the same, and although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the technical solution described in the above-mentioned embodiments may be modified or some technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiments of the present invention.
Claims (8)
1. The primary incoming pressure early warning method for the working face roof is characterized by comprising the following steps of:
determining the coal body fracture parameter increment of the surface layer of the coal wall and the coal body fracture parameter increment of the coal body in a target time interval;
Determining index early warning values corresponding to all parameter increments based on the coal wall surface layer coal body fracture parameter increments and the coal body fracture parameter increments in the period from initial mining to initial pressure of the adjacent working face in a target monitoring period, setting standard grading values corresponding to all parameter increments based on the index early warning values corresponding to all parameter increments and the size of all parameter increments, and constructing early warning index grading standards based on the standard grading values corresponding to all parameter increments;
Obtaining a scoring value of each parameter increment based on an early warning index scoring standard, wherein the early warning index scoring standard is determined based on an index early warning value corresponding to each parameter increment;
Determining a primary pressure comprehensive prediction index based on the grading value of each parameter increment and the highest standard grading value corresponding to each parameter increment;
And under the condition that the primary incoming pressure comprehensive prediction index exceeds an index threshold value, primary incoming pressure early warning is carried out.
2. The method for early warning of initial pressure of a roof of a working surface according to claim 1, wherein before determining the coal wall surface layer coal body fracture parameter increment and the coal body internal fracture parameter increment within the target time interval, further comprises:
And carrying out coal wall surface layer crack scanning identification by adopting a three-dimensional laser scanner, and carrying out coal body internal crack change identification by adopting an electromagnetic wave CT system.
3. The method for early warning of initial pressure of a working surface roof according to any one of claims 1 to 2, wherein the initial pressure comprehensive prediction index is:
Wherein, W is the primary incoming pressure comprehensive prediction index, G i is the scoring value of the i-th evaluation index increment, G imax is the highest standard scoring value of the i-th evaluation index increment, and the evaluation index increment is used for indicating each parameter increment.
4. The method for primary pressure warning of a working surface roof according to any one of claims 1 to 2, wherein the determining the primary pressure comprehensive prediction index based on the score value of each parameter increment and the highest standard score value corresponding to each parameter increment includes:
Establishing a primary incoming pressure prediction window;
and determining the primary incoming call comprehensive prediction index based on the grading value of each parameter increment and the highest standard grading value corresponding to each parameter increment in any target time interval in the primary incoming call prediction window.
5. The method for early warning of primary pressure of a working surface roof according to any one of claims 1 to 2, wherein the coal wall surface coal body fracture parameters comprise coal body horizontal displacement, coal body vertical displacement, fracture density, fracture spacing and fracture width;
The fracture parameters in the coal body comprise electromagnetic wave attenuation coefficients.
6. The utility model provides a working face roof is first to come and is pressed early warning device which characterized in that includes:
the first determining module is used for determining the coal body fracture parameter increment of the coal wall surface layer and the coal body internal fracture parameter increment in the target time interval;
The second determining module is used for obtaining the scoring value of each parameter increment based on the early warning index scoring standard, and the early warning index scoring standard is determined based on the index early warning value corresponding to each parameter increment;
The fourth determining module is used for determining index early warning values corresponding to the parameter increments based on the coal wall surface layer coal body crack parameter increments and the coal body internal crack parameter increments in the period from initial mining to initial pressure starting of the adjacent working face in the target monitoring period;
the setting module is used for setting standard grading values corresponding to the parameter increments based on the index early warning values corresponding to the parameter increments and the sizes of the parameter increments;
the construction module is used for constructing the early warning index scoring standard based on the standard scoring values corresponding to the parameter increments;
the third determining module is used for determining a primary incoming pressure comprehensive prediction index based on the grading value of each parameter increment and the highest standard grading value corresponding to each parameter increment;
and the early warning module is used for carrying out initial incoming call early warning under the condition that the initial incoming call comprehensive prediction index exceeds an index threshold value.
7. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of initial pressure warning of a worksurface roof as claimed in any one of claims 1 to 5 when the program is executed by the processor.
8. A non-transitory computer readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor implements the method of face top initial approach warning of any one of claims 1 to 5.
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