CN110748382A - Stress monitoring method and device for goaf - Google Patents
Stress monitoring method and device for goaf Download PDFInfo
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- CN110748382A CN110748382A CN201910958310.7A CN201910958310A CN110748382A CN 110748382 A CN110748382 A CN 110748382A CN 201910958310 A CN201910958310 A CN 201910958310A CN 110748382 A CN110748382 A CN 110748382A
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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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Abstract
The invention relates to the field of coal mine roadway support, and provides a method and a device for monitoring stress of a goaf. The goaf stress monitoring method comprises the following steps: digging a mounting groove in a bottom plate rock layer on one side of the hydraulic support close to the propelling direction of the working surface; placing a liftable stress monitoring device in the mounting groove; filling covering materials above the stress monitoring device and in the peripheral gap; moving the hydraulic support towards the propelling direction of the working face until a base of the hydraulic support passes through the stress monitoring device, wherein the stress monitoring device is positioned below a shield beam of the hydraulic support; and lifting the stress monitoring device so that the upper surface of the stress monitoring device protrudes out of the bottom plate rock stratum. According to the goaf stress monitoring method, the stress monitoring device is placed quickly and conveniently. In addition, the stress monitoring device is lifted, so that the upper surface of the stress monitoring device is directly loaded with the gangue falling from the top plate, the influence of the bottom plate rock stratum at the periphery of the installation groove on monitoring data is effectively avoided, and the real stress change caused by the caving of the top plate of the goaf can be obtained.
Description
Technical Field
The invention relates to the field of coal mine roadway support, and provides a method and a device for monitoring stress of a goaf.
Background
In the coal mine roadway surrounding rock control technology, mine pressure is the research focus of roadway surrounding rock control, and is mainly caused by surrounding rock stress redistribution and surrounding rock structure deformation damage caused by activities such as roadway excavation, working face extraction and the like, a roadway roof is one of main indexes for analyzing mine pressure display, and the understanding of the activity conditions of the roadway roof and overlying strata has important guiding significance for researching mine pressure distribution and mine pressure display characteristics.
At the present stage, mine pressure monitoring technical means for coal mine tunnels are gradually improved, but observation means for a goaf behind a coal face are less. The goaf stress monitoring data has a certain guiding function for researching the collapse, breakage and overturning conditions of the overlying rock layer of the goaf, and has an important significance for forming all-dimensional mine pressure data of a coal mine roadway and a working face. The stress monitoring device is installed in the goaf, so that the pressure of the top plate above the goaf and the activity rule of the top plate are monitored.
The following problems mainly exist in the aspect of goaf stress monitoring at the present stage:
the monitoring instrument part adopts a buried stress monitoring ball, the goaf stress monitoring data is calculated through the deformation of a built-in strain gauge, the geological condition in the goaf is poor, the precise monitoring instrument is easy to damage, the requirement of the burying process is harsh, and otherwise, the data is easy to cause inaccuracy.
The embedding method adopts a coal pillar penetrating wiring method, when the stoping roadway is arranged in a double roadway, the monitoring line needs to be introduced into the other roadway through the lower part of the push rod of the hydraulic support, the installation process is complex, time and labor are wasted, and the monitoring line needs to be rolled by a plurality of hydraulic supports, so that the monitoring line is easily damaged.
In order to prevent the monitoring instrument from being damaged by the hydraulic support, the embedding depth is large, broken rock blocks after a top plate collapses are smashed on a bottom plate, a large part of surrounding rocks of the solid bottom plate around the monitored device under pressure are scattered, and the acquired data are not real pressure data of a goaf.
In conclusion, an effective monitoring means is lacked for monitoring the stress of the goaf at the present stage.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art. Therefore, the goaf stress monitoring method can effectively obtain the caving characteristic and the stress evolution rule of the goaf roof of the coal face, can form all-dimensional stress monitoring data of the working face by combining conventional monitoring data, has important guiding significance for researching the roof overlying strata activity, and has important research significance for enriching and perfecting the mine pressure monitoring data and guiding the control of the surrounding rocks of the roadway.
The invention further provides a device for monitoring the stress of the goaf.
According to one aspect of the invention, the goaf stress monitoring method comprises the following steps:
digging a mounting groove in a bottom plate rock layer on one side of the hydraulic support close to the propelling direction of the working surface;
placing a liftable stress monitoring device in the mounting groove;
filling covering materials above the stress monitoring device and in the peripheral gap in the mounting groove;
moving the hydraulic support towards the propelling direction of the working face until a base of the hydraulic support passes through the stress monitoring device, wherein the stress monitoring device is positioned below a shield beam of the hydraulic support;
and lifting the stress monitoring device so that the upper surface of the stress monitoring device protrudes out of the bottom plate rock stratum.
The goaf stress monitoring method can effectively solve the technical problem in goaf stress monitoring. Wherein, place stress monitoring devices in the mounting groove that is close to working face advancing direction one side, stress monitoring devices places fast conveniently. In addition, the stress monitoring device is lifted, the upper surface of the stress monitoring device is enabled to directly bear the gangue falling from the top plate, the influence of the bottom plate rock stratum at the periphery of the installation groove on monitoring data is effectively avoided, and the real stress change and the stress evolution law caused by the caving of the top plate of the goaf can be directly obtained. On the basis, the comprehensive stress monitoring data of the working face is formed by combining with the conventional monitoring data, so that the comprehensive stress monitoring data has important guiding significance for researching the roof overlying strata activity, and has important research significance for enriching and perfecting the mine pressure monitoring data and guiding the control of the surrounding rocks of the roadway.
According to an embodiment of the present invention, the step of placing the liftable stress monitoring device in the mounting groove includes:
placing a bearing plate provided with a stress sensor above a lifting driving unit, and assembling to form a lifting stress monitoring device;
the bottom of the lifting driving unit is fixed in the mounting groove.
According to one embodiment of the invention, in the step of placing the bearing plate provided with the stress sensor above the lifting driving unit and forming the lifting stress monitoring device through assembly, a hydraulic cylinder is adopted as the driving unit;
the step of raising the stress monitoring device so that the upper surface of the stress monitoring device protrudes from the floor rock layer comprises:
a manual hydraulic pump is connected with a hydraulic cylinder through a hydraulic pipeline;
the hydraulic cylinder is pressurized through the manual hydraulic pump, and the bearing plate is lifted, so that the bearing plate protrudes out of the bottom rock stratum.
According to an embodiment of the present invention, further comprising:
and laying a hydraulic pipeline along the gap between the adjacent hydraulic supports.
According to an embodiment of the present invention, after the step of pressurizing the hydraulic cylinder by the manual hydraulic pump to lift the bearing plate so that the bearing plate protrudes from the floor rock stratum, the method includes:
removing the manual hydraulic pump and the hydraulic pipeline;
and (5) stoping the working face.
According to an embodiment of the present invention, the step of filling the mounting groove with a covering material above the stress monitoring device and in the peripheral gap includes:
filling cotton yarns above the stress monitoring device and in the gaps at the periphery of the stress monitoring device;
float coal is filled above the cotton yarn.
According to an embodiment of the present invention, further comprising:
fixing the monitoring substation and the power box on a hydraulic support;
connecting a stress monitoring device and a monitoring substation by adopting a data line, wherein the data line is hung on one side of a hydraulic support;
and a power line is adopted to connect the monitoring substation and the power box.
According to an embodiment of the present invention, further comprising:
inserting the monitoring data wire core into the hollow threaded metal hose to obtain a data wire;
and laying the data line along the gap between the adjacent hydraulic supports.
According to another aspect of the invention, a stress monitoring device comprises:
a lifting drive unit;
the stress sensor is fixed on the bearing plate;
and the bearing plate is fixed at the upper end of the lifting driving unit.
According to an embodiment of the present invention, the lifting driving unit is a plurality of hydraulic cylinders, all the hydraulic cylinders are distributed along the outer edge of the bearing plate, all the hydraulic cylinders are communicated with the manual hydraulic pump through a hydraulic control valve set, the hydraulic control valve set includes a hydraulic control valve and a check valve, and the check valve is communicated in one direction along the direction from the manual hydraulic pump to the hydraulic cylinders.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a stress monitoring state in a first state in a gob according to an embodiment of the present invention;
FIG. 2 is a schematic view of a stress monitoring state in a second state in the gob according to an embodiment of the present invention;
FIG. 3 is a schematic view of a stress monitoring state in a third state in a gob according to an embodiment of the present invention;
FIG. 4 is a schematic perspective view of a stress monitoring apparatus according to an embodiment of the present invention;
FIG. 5 is a schematic view of a partial structure of a stress monitoring apparatus according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a data line according to an embodiment of the present invention;
in the figure: 1: a stress sensor; 2: a hydraulic cylinder; 3: a hydraulic control valve bank; 4: a pressure equalizing pipeline; 5: a hydraulic line; 6: a data line; 7: a carrier plate; 8: mounting a plate; 9: monitoring the data wire core; 10: a hydraulic support; 11: a hydraulic prop; 12: a cable hook; 13: a power supply box; 14: monitoring substations; 15: a power line; 16: a working surface; 17: gangue; 18: float coal; 19: a manual hydraulic pump; 20: a floor rock layer; 21: mounting grooves; 22: a first line; 23: a second line; 24: and (4) covering the beam.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this description, a schematic representation of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 3, a goaf stress monitoring method according to an embodiment of the present invention includes:
s1, digging a mounting groove 21 in the bottom rock layer 20 on one side, close to the propelling direction of the working face 16, of the hydraulic support 10;
s2, placing the liftable stress monitoring device in the mounting groove 21;
s3, filling a covering above the stress monitoring device in the mounting groove 21;
s4, moving the hydraulic support 10 towards the advancing direction of the working surface 16 until the base of the hydraulic support 10 passes through the stress monitoring device, and the stress monitoring device is positioned below the shield beam 24 of the hydraulic support 10;
s5, raising the stress monitoring device so that the upper surface of the stress monitoring device protrudes from the floor rock layer 20.
It should be noted that the above steps S1 to S5 are only for convenience of the following description, and do not limit the order of the steps of the goaf stress monitoring method.
The goaf stress monitoring method can effectively solve the technical problem in goaf stress monitoring. Wherein, the stress monitoring device is arranged in the mounting groove 21 close to one side of the advancing direction of the working surface 16, and the stress monitoring device is arranged quickly and conveniently. In addition, the stress monitoring device is lifted, so that the upper surface of the stress monitoring device bears the gangue 17 falling from the top plate, the influence of the bottom plate rock stratum 20 around the installation groove 21 on monitoring data is effectively avoided, and the real stress change and the stress evolution law caused by the caving of the top plate of the goaf can be directly obtained. On the basis, the comprehensive stress monitoring data of the working face 16 is formed by combining with the conventional monitoring data, so that the comprehensive stress monitoring data has important guiding significance for researching the roof overlying strata activity, and has important research significance for enriching and perfecting the mine pressure monitoring data and guiding the control of the surrounding rocks of the roadway.
At S1, the "side of the hydraulic bracket 10 closer to the advancing direction of the work surface 16" is the left side in fig. 1 to 3. In fig. 1-3, the working surface 16 is advanced away from the gob, i.e., to the left.
In addition, in S1, the shape and structure of the mounting groove 21 are not limited as long as the placement requirements of the stress monitoring device are met. In one embodiment, the mounting groove 21 is 600mm × 600mm × 700 mm.
In S2, place the stress monitoring device of liftable in the middle of mounting groove 21, include:
placing the bearing plate 7 provided with the stress sensor 1 above the lifting driving unit, and assembling to form a lifting stress monitoring device;
the bottom of the elevation driving unit is fixed in the installation groove 21.
That is, in S2, the liftable stress monitoring apparatus includes the stress sensor 1, the carrier plate 7, the lifting drive unit, and the like. Of course, the structure of the liftable stress monitoring device is not limited by the examples provided herein, as long as the lifting requirements are met, and the stress can be monitored.
Further, in S2, the hydraulic cylinder 2 is used as the drive unit. On the basis, in order to lift the stress monitoring device, a manual hydraulic pump 19 can be connected with the hydraulic cylinder 2 through a hydraulic pipeline 5, the hydraulic cylinder 2 is pressurized through the manual hydraulic pump 19, and the bearing plate 7 is lifted, so that the bearing plate 7 protrudes out of the bottom rock layer 20.
Of course, when using the hydraulic cylinder 2 as the drive unit, instead of pressurizing the hydraulic cylinder 2 by the manual hydraulic pump 19, the hydraulic cylinder 2 may be pressurized by any means disclosed in the prior art. Furthermore, the driving unit does not have to be in the form of a hydraulic cylinder 2, but can also be in the form of a cylinder, a linear motor or any other structure that is disclosed in the prior art and can drive the carrying plate 7 to lift.
Wherein the hydraulic cylinder 2 may be, but is not limited to, a cylinder.
In one embodiment, the stress monitoring device is constructed as shown in fig. 4 and 5.
Further, in order to facilitate the installation of the stress monitoring device, a mounting plate 8 is further arranged at the bottom of the lifting driving unit, and the bottom ends of all the lifting driving units are fixed on the mounting plate 8.
In order to prevent the hydraulic line 5 from being damaged by the hydraulic brackets 10, the hydraulic line 5 is laid along the gap between the adjacent hydraulic brackets 10. It should also be noted that during the advancement of the hydraulic mount 10 along the work surface 16, the hydraulic line 5 may be laid along the direction of advancement of the work surface 16.
Wherein, when laying the hydraulic pipeline 5, broken rock blocks and/or float coals 18 with dropped top plates can be covered above the hydraulic pipeline 5. The broken rock pieces and/or float coal 18 can now be seen as a protective layer of the hydraulic line 5.
Further, according to the goaf stress monitoring method of the embodiment of the present invention, in step S5, pressurizing the hydraulic cylinder 2 by the manual hydraulic pump 19 to lift the carrying floor 7 such that the carrying floor 7 protrudes from the floor rock layer 20, and then:
the manual hydraulic pump 19 and the hydraulic pipeline 5 are removed;
a stope face 16.
According to the goaf stress monitoring method of the embodiment of the invention, in S3, the step of filling a covering above the stress monitoring device in the installation groove 21 includes:
filling covering materials in gaps above the stress monitoring device and between the stress monitoring device and the mounting groove 21;
float coal 18 is filled over the cotton yarn.
It so covers cotton yarn and float coal 18 above stress monitoring devices, except because cotton yarn and float coal 18 are softer, the lumpiness is little, can not damage the monitoring line because the sharp edges and corners of block under the pressure effect, still because cotton yarn and float coal 18 all obtain and the cost is lower comparatively easily. Of course, instead of filling the installation groove 21 with cotton and float coal 18, other coverings that are soft and easily form a protection for the stress monitoring device can be used here.
In S4, the working face 16 is normally mined, the hydraulic support 10 moves along the advancing direction of the working face 16, and after the working face 16 recovers a base length of the hydraulic support 10, the stress monitoring device is located in a rock stratum below the shield beam 24 of the hydraulic support 10. When the hydraulic supports 10 are moved in the direction of advance of the working surface 16 by a cutting depth, the data line 6 is laid once along the gap between the two hydraulic supports 10.
And, what the stress monitoring device is located in the rock formation below the shield beam 24 of the hydraulic support 10 in S4 is that: in fig. 2, the extension of the shield beam 24 intersects the floor strata 20 at the intersection line, and the stress monitoring device is located on the right side of the base of the hydraulic support 10 and on the left side of the intersection line, so that only part of the collapsed mine spoil 17 falls on the stress monitoring device under the influence of the shield beam 24. While the gangue 17 in this portion is not compacted and the pressure generated is less.
The goaf stress monitoring method further comprises the following steps:
fixing a monitoring substation 14 and a power box 13 on the hydraulic support 10;
a data line 6 is adopted to connect the stress monitoring device and the monitoring substation 14, and the data line 6 is hung on one side of the hydraulic prop 11;
the monitoring substation 14 and the power box 13 are connected by a power cord 15.
After the stress monitoring device, the monitoring substation 14 and the power box 13 are connected, the stress monitoring device can be debugged.
The monitoring substation 14 can adopt a commercially available mining explosion-proof intrinsic safety type monitoring substation 14 with the model KJ25-F, and the monitoring substation 14 is connected with the shield beam 24 of the hydraulic support 10 through a second line 23. Furthermore, the monitoring substation 14 is fixed below the shield beam 24, and the monitoring substation 14 and the hydraulic support 10 can move synchronously.
In addition, the power box 13 can adopt a commercially available mining explosion-proof and intrinsically safe uninterrupted power box 13 with the model of KDW660/21B, and the power box 13 is connected with the shield beam 24 of the hydraulic support 10 through the first line 22, so that the power box 13 and the hydraulic support 10 can keep synchronous motion.
Wherein the power box 13 can be connected with the lighting electricity of the coal face 16.
In addition, the monitoring data wire core 9 is inserted into the hollow thread metal hose to obtain the data wire 6, and the structure of the data wire 6 can refer to fig. 6. For example, the inner diameter of the hollow threaded metal hose is 16mm, the monitoring data wire core 9 is located inside the hollow threaded metal hose, and then the monitoring data wire core 9 is not easily affected by the broken gangue 17 in the goaf under the protection of the hollow threaded metal hose.
The data line 6 can be hung on a cable hook 12 connected with a hydraulic support 11 of the hydraulic support 10 and laid along a gap between the two hydraulic supports 10, only the length of the data line 6 of the moving distance of the hydraulic support 10 needs to be released in advance in the moving process of the hydraulic support 10, fragments of a top plate falling between the hydraulic supports 10 and float coal 18 on a working surface 16 can cover the data line 6, and the data line 6 is prevented from being directly influenced by a large gangue 17 collapsed on the top plate after entering a goaf. And orderly paying off is carried out along with the movement of the hydraulic support 10, so that the installation time of the stress monitoring device is greatly shortened, the accuracy of data monitoring is ensured, and the stress monitoring device has important research significance for enriching and perfecting mine pressure monitoring data and guiding the control of surrounding rocks of the roadway.
According to an embodiment of the present invention, there is provided a stress monitoring device including:
a lifting drive unit;
the stress sensor 1 is fixed on the bearing plate 7;
and the bearing plate 7 is fixed at the upper end of the lifting driving unit.
The structure of the stress monitoring device is shown in fig. 4 and 5.
The stress sensor 1 can be fastened to the carrier plate 7 by means of screws.
In fig. 4 and 5, the lift driving unit is a hydraulic cylinder 2, and the number thereof is four. Of course, the type, number and installation position of the lifting driving unit are not limited by the attached drawings.
In fig. 4 and 5, the hydraulic cylinders 2 are distributed along the outer edge of the bearing plate 7, all the hydraulic cylinders 2 are communicated with the manual hydraulic pump 19 through the hydraulic control valve group 3, the hydraulic control valve group 3 comprises a hydraulic control valve and a check valve, and the check valve is communicated in one direction to the hydraulic cylinders 2 along the manual hydraulic pump 19.
Wherein, through the setting of check valve, can prevent that hydraulic oil backward flow from causing the release. The hydraulic control valve is connected with the hydraulic cylinder 2 through a pressure equalizing pipeline 4 to control the hydraulic cylinder 2 to be balanced hydraulically. The hydraulic control valve provides equal pressure for the four hydraulic cylinders 2 through the pressure equalizing pipeline 4, pushes the hydraulic cylinders 2 to extend out of a set range, and drives the bearing plate 7 of the stress sensor 1 to move towards the direction of the notch of the mounting groove 21. Wherein, the pressure equalizing pipeline 4 ensures that each hydraulic cylinder 2 moves synchronously, ensures that the bearing plate 7 keeps horizontal, and avoids the inclination of the bearing plate 7 and the stress sensor 1.
The bearing plate 7 can be a 400mm × 400mm × 20mm plane iron plate, and the stress sensor 1 can be a commercially available intrinsic safety type pressure gauge for mine, wherein the type of the pressure gauge is MC-500. Of course, the type of the stress sensor 1 is not limited to the examples given here, but it may also take the form of a strain gauge construction, for example.
According to the embodiment of the invention, the goaf stress monitoring equipment comprises the stress monitoring device and a hydraulic support 10, wherein a monitoring substation 14 is fixed on the hydraulic support 10, and the monitoring substation 14 is connected with the stress monitoring device, so that the stress monitoring device can send the measured stress to the monitoring substation.
As can be seen from fig. 1 and 3, the hydraulic support 10 includes a hydraulic prop 11 for performing a supporting and fixing function.
The monitoring substations 14 can be fixed to the shield beams 24, and the monitoring substations 14 move synchronously with the hydraulic supports 10.
In addition, the goaf stress monitoring equipment further comprises a power supply box 13, and the power supply box 13 is fixed on the shield beam 24. The power box 13 supplies power to other electrical components of the goaf stress monitoring equipment in addition to the monitoring substation 14.
According to one embodiment of the invention, the monitoring substation 14 and the stress monitoring device may be connected by a data line 6. Of course, the monitoring substation and the stress monitoring device can be connected in a wireless mode.
The data line can adopt the structural forms of the monitoring data wire core 9 and the hollow thread metal hose.
In addition, collecting space area stress monitoring facilities still includes manual hydraulic pump 19, and hydraulic cylinder 2 is connected through hydraulic line to manual hydraulic pump 19, and then pressurizes to hydraulic cylinder 2 through manual hydraulic pump 19.
The above embodiments are merely illustrative of the present invention and are not to be construed as limiting the invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and the technical solution of the present invention is covered by the claims of the present invention.
Claims (10)
1. A goaf stress monitoring method is characterized by comprising the following steps:
digging a mounting groove in a bottom plate rock layer on one side of the hydraulic support close to the propelling direction of the working surface;
placing a liftable stress monitoring device in the mounting groove;
filling covering materials above the stress monitoring device and in the peripheral gap in the mounting groove;
moving the hydraulic support towards the propelling direction of the working face until a base of the hydraulic support passes through the stress monitoring device, wherein the stress monitoring device is positioned below a shield beam of the hydraulic support;
and lifting the stress monitoring device so that the upper surface of the stress monitoring device protrudes out of the bottom plate rock stratum.
2. The goaf stress monitoring method of claim 1, wherein the step of placing a liftable stress monitoring device in a mounting groove comprises:
placing a bearing plate provided with a stress sensor above a lifting driving unit, and assembling to form a lifting stress monitoring device;
the bottom of the lifting driving unit is fixed in the mounting groove.
3. The goaf stress monitoring method according to claim 2, wherein in the step of placing the loading plate equipped with the stress sensor above the lifting driving unit and forming the liftable stress monitoring device by assembly, a hydraulic cylinder is used as the driving unit;
the step of raising the stress monitoring device so that the upper surface of the stress monitoring device protrudes from the floor rock layer comprises:
a manual hydraulic pump is connected with a hydraulic cylinder through a hydraulic pipeline;
the hydraulic cylinder is pressurized through the manual hydraulic pump, and the bearing plate is lifted, so that the bearing plate protrudes out of the bottom rock stratum.
4. The goaf stress monitoring method of claim 3, further comprising:
and laying a hydraulic pipeline along the gap between the adjacent hydraulic supports.
5. The goaf stress monitoring method of claim 4, wherein the step of raising the load floor by pressurizing a hydraulic cylinder with a manual hydraulic pump such that the load floor protrudes from the floor strata is followed by:
removing the manual hydraulic pump and the hydraulic pipeline;
and (5) stoping the working face.
6. The goaf stress monitoring method of claim 1, wherein the step of filling a covering in the mounting groove above the stress monitoring device and in the peripheral gap comprises:
filling cotton yarns above the stress monitoring device and in the gaps at the periphery of the stress monitoring device;
float coal is filled above the cotton yarn.
7. The goaf stress monitoring method of claim 1, further comprising:
fixing the monitoring substation and the power box on a hydraulic support;
connecting a stress monitoring device and a monitoring substation by adopting a data line, wherein the data line is hung on one side of a hydraulic support;
and a power line is adopted to connect the monitoring substation and the power box.
8. The goaf stress monitoring method of claim 7, further comprising:
inserting the monitoring data wire core into the hollow threaded metal hose to obtain a data wire;
and laying the data line along the gap between the adjacent hydraulic supports.
9. A stress monitoring apparatus for use in a goaf stress monitoring method in accordance with any one of claims 1 to 8, comprising:
a lifting drive unit;
the stress sensor is fixed on the bearing plate;
and the bearing plate is fixed at the upper end of the lifting driving unit.
10. The goaf stress monitoring method according to claim 9, wherein the lifting drive units are a plurality of hydraulic cylinders, all the hydraulic cylinders are distributed along the outer edge of the loading plate, all the hydraulic cylinders are communicated with a manual hydraulic pump through a hydraulic control valve bank, and the hydraulic control valve bank comprises a hydraulic control valve and a check valve, and the check valve is communicated in one direction from the manual hydraulic pump to the hydraulic cylinders.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113358481A (en) * | 2021-05-28 | 2021-09-07 | 煤炭科学技术研究院有限公司 | Stress monitoring system and method for waterproof airtight wall of underground goaf |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090134692A1 (en) * | 2005-07-15 | 2009-05-28 | Commonwealth Scientific And Industrial Research Organisation | Method and apparatus for monitoring gateroad structural change |
| CN102261972A (en) * | 2011-04-19 | 2011-11-30 | 中国矿业大学(北京) | Experimental platform for relation between mining fully-mechanized support and surrounding rocks |
| CN102400714A (en) * | 2010-09-11 | 2012-04-04 | 中国矿业大学 | High-water pressure, high-stress and automatic-mining mine water disaster comprehensive analog system and test method |
| CN102777201A (en) * | 2012-07-26 | 2012-11-14 | 山东科技大学 | Ventilation method for exploiting short distance coal bed in fire zone based on positive pressure ventilation system |
| CN103266914A (en) * | 2013-06-07 | 2013-08-28 | 冀中能源集团有限责任公司 | Automatic solid-filling coal mining control system |
| CN105443123A (en) * | 2015-11-05 | 2016-03-30 | 安徽理工大学 | Automatic coal-cutting stimulation system for analog simulation experiment |
| CN107227976A (en) * | 2017-06-09 | 2017-10-03 | 中南大学 | A kind of underground pressure management method suitable for underground mine deep mining |
| CN107849919A (en) * | 2015-06-15 | 2018-03-27 | 乔伊·姆·特拉华公司 | System and method for monitoring longwell mine roof stability |
| CN108549780A (en) * | 2018-04-23 | 2018-09-18 | 天地科技股份有限公司 | Shallow embedding deep space stays the load evaluation method of tunnel filling body |
| CN109707453A (en) * | 2018-12-12 | 2019-05-03 | 中煤能源研究院有限责任公司 | A kind of permanent chamber impact Safety Argumentation method of coal mine |
-
2019
- 2019-10-10 CN CN201910958310.7A patent/CN110748382B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090134692A1 (en) * | 2005-07-15 | 2009-05-28 | Commonwealth Scientific And Industrial Research Organisation | Method and apparatus for monitoring gateroad structural change |
| CN102400714A (en) * | 2010-09-11 | 2012-04-04 | 中国矿业大学 | High-water pressure, high-stress and automatic-mining mine water disaster comprehensive analog system and test method |
| CN102261972A (en) * | 2011-04-19 | 2011-11-30 | 中国矿业大学(北京) | Experimental platform for relation between mining fully-mechanized support and surrounding rocks |
| CN102777201A (en) * | 2012-07-26 | 2012-11-14 | 山东科技大学 | Ventilation method for exploiting short distance coal bed in fire zone based on positive pressure ventilation system |
| CN103266914A (en) * | 2013-06-07 | 2013-08-28 | 冀中能源集团有限责任公司 | Automatic solid-filling coal mining control system |
| CN107849919A (en) * | 2015-06-15 | 2018-03-27 | 乔伊·姆·特拉华公司 | System and method for monitoring longwell mine roof stability |
| CN105443123A (en) * | 2015-11-05 | 2016-03-30 | 安徽理工大学 | Automatic coal-cutting stimulation system for analog simulation experiment |
| CN107227976A (en) * | 2017-06-09 | 2017-10-03 | 中南大学 | A kind of underground pressure management method suitable for underground mine deep mining |
| CN108549780A (en) * | 2018-04-23 | 2018-09-18 | 天地科技股份有限公司 | Shallow embedding deep space stays the load evaluation method of tunnel filling body |
| CN109707453A (en) * | 2018-12-12 | 2019-05-03 | 中煤能源研究院有限责任公司 | A kind of permanent chamber impact Safety Argumentation method of coal mine |
Non-Patent Citations (2)
| Title |
|---|
| 周钢;李玉寿;张强;邹长磊;王超;尹雄;樊佛佑;: "陈四楼矿综采工作面采场应力监测及演化规律研究", 煤炭学报, no. 05, 15 May 2016 (2016-05-15) * |
| 庞义辉;王国法;李冰冰;: "深部采场覆岩应力路径效应与失稳过程分析", 岩石力学与工程学报, no. 04 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113358481A (en) * | 2021-05-28 | 2021-09-07 | 煤炭科学技术研究院有限公司 | Stress monitoring system and method for waterproof airtight wall of underground goaf |
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