CN105181372A - Simulation system used for simulating coal mining and simulation test method - Google Patents

Abstract

The invention discloses a simulation system for simulating coal seam mining, which comprises a test box. A similar coal seam bottom plate similar to the bottom plate of the coal seam to be simulated mining is poured at the bottom of the test box; Two similar coal pillars similar to the coal pillars of the coal seam to be simulated mining; a simulated coal seam is set between two adjacent similar coal pillars, and the simulated coal seam is composed of a plurality of simulated mining pipes that can be extracted; At least one similar rock layer similar to the upper rock layer of the coal seam to be simulated mining is poured above the production pipe. The invention also discloses a simulation test method. The simulation system and simulation test method provided by the present invention can simulate the coal seam mining process, and is useful for studying the damage and crack development process of the roof and floor rock mass and the change and evolution law of the seepage characteristics of the disturbed rock formation during the coal seam mining process under the condition of water conservation mining. Research matters.

Description

A simulation system and simulation test method for simulating coal seam mining

technical field

The invention relates to the technical field of comprehensive utilization of mining engineering and geotechnical engineering, in particular to a simulation system and a simulation test method for simulating coal seam mining.

Background technique

The pattern of coal occupying the dominant position in my country's energy structure is difficult to change for a long time. At the same time, the environmental problems caused by the development and utilization of my country's coal resources have become increasingly prominent. On the one hand, the coal-rich areas in western my country are mostly in arid and semi-arid areas, where water resources are scarce and the surface ecology is fragile; on the other hand, mine water is unavoidable in the process of coal mining, and if it is not handled properly, it will not only cause damage to groundwater resources At the same time, it will also cause a series of hazards such as reduction of river runoff, depletion of water resources, land desertification, environmental pollution, and surface subsidence. Therefore, protecting water resources and surface ecological environment is a major issue facing the development of coal resources in western my country.

It is a major measure to comprehensively utilize groundwater resources, protect aquifers, ensure safe production of coal mines, and reuse groundwater sources after abandoned mines by using coal mine goafs to build underground reservoirs and realize water conservation mining. "Green coal" is also a major national strategic issue and will be included in the important research content of major national science and technology projects. In the design and construction of underground reservoirs, the reservoir site and dam site, storage capacity and characteristic water level, groundwater regulation and water quality filtration and purification all depend on the permeability of the roof and floor rock mass, the permeability coefficient and water storage coefficient of the water-conducting fracture zone and the collapsed body , and the dynamic change or variation characteristics and laws of these parameters. And these problems depend on the physical characteristics of roof and floor rock mass damage and fracture development process and evolution law, damaged rock mass collapse mode, scope, accumulation type, block size distribution, pore size and distribution during the coal seam mining process.

Under field conditions, it is difficult to directly observe, watch, and accurately test these physical characteristics and related physical and mechanical parameters.

Under the condition of water-rock coupling physical model test, how to simulate the coal seam mining method on site as realistically as possible, so as to study the damage and crack development process and evolution law of roof and floor rock mass, and the collapse mode of damaged rock mass in the process of coal seam mining under the condition of water conservation mining It is of great significance to study the related problems of distributed underground reservoirs in coal mines.

Contents of the invention

The purpose of the present invention is to overcome the defects in the prior art, and provide a simulation system and a simulation test method for simulating coal seam mining that can simulate the coal seam mining process.

The technical scheme of the present invention provides a simulation system for simulating coal seam mining, including a test box, and a similar coal seam bottom plate similar to the bottom plate of the coal seam to be simulated mining is poured at the bottom of the test box; At least two similar coal pillars similar to the coal pillars of the coal seam to be simulated mining are poured at intervals on the bottom plate; a simulated coal seam is set between two adjacent similar coal pillars, and the simulated coal seam is composed of multiple The simulated production pipes that can be extracted are arranged in an arrangement; above the simulated production pipes, there is at least one layer of similar rock layer similar to the upper rock layer of the coal seam to be simulated to be mined.

Further, leveling sand layers are arranged above the plurality of simulated production pipes.

Further, the leveling sand layer is composed of medium-fine sand.

Further, the simulated coal seam includes at least three rows of simulated production pipe groups extending towards the similar coal pillars on both sides; three rows of simulated production pipe groups are stacked together; each row of simulated production pipe groups It consists of a plurality of simulated production pipes, and the simulated production pipes in two adjacent rows of simulated production pipe groups are arranged in a staggered manner.

Further, the simulated production pipe includes a first simulated production pipe and a second simulated production pipe, wherein the diameter of the first simulated production pipe is larger than the diameter of the second simulated production pipe; each row of the simulated production pipe group Each consists of a plurality of first simulated production pipes and second simulated production pipes, wherein one second simulated production pipe is arranged between every two adjacent first simulated production pipes.

Further, the simulated production pipe includes a first simulated production pipe and a second simulated production pipe, wherein the diameter of the first simulated production pipe is larger than the diameter of the second simulated production pipe; the simulated production pipe group consists of A first simulated production tube group consisting of a plurality of first simulated production tubes and a second simulated production tube group composed of a plurality of second simulated production tubes; wherein, every two rows of adjacent first simulated production tubes A row of the second simulated production pipe group is arranged between the production pipe groups.

Further, the simulated production pipe is a polyvinyl chloride pipe.

Further, multiple layers of the similar rock layers are poured above the simulated production pipe.

The technical solution of the present invention also provides a simulation test method using a simulation system to simulate coal seam mining, including the following steps: Step 1: pouring a similar coal seam bottom plate similar to the bottom plate of the coal seam to be simulated mining at the bottom of the test box; step 2: pouring at least two similar coal pillars similar to the coal pillars of the coal seam to be simulated mined at intervals on the floor of the similar coal seam; step 3: meeting the strength requirements on the floor of the similar coal seam and the similar coal pillar After the request, a simulated coal seam is arranged between two adjacent similar coal pillars, and the simulated coal seam is composed of a plurality of simulated production pipes that can be extracted; step 4: pouring at least A layer of similar rock layer similar to the upper rock layer of the coal seam to be simulated mining; Step 5: After the similar rock layer meets the strength requirements, the simulated mining pipe is pulled at a constant speed according to a preset time interval to simulate the coal seam on site mining.

Further, the step 2 also includes the following steps: Step 21: arrange a leveling sand layer on a plurality of the simulated production pipes, and pass through the leveling sand layer on the upper surface of the multiple simulated production pipes after they are stacked and formed. After the sand layer is leveled, the operation of step 3 is performed.

Further, the simulated production pipe in step 5 is extracted in the following manner: the simulated production pipe is extracted at a constant speed from the similar coal pillar on one side to the similar coal pillar on the other side.

Further, the simulated production pipe in step 5 is extracted in the following manner: extract the simulated pipe at a uniform speed from a specified position between the two similar coal pillars at the same time in the direction of the two similar coal pillars. Mining pipe.

Further, the step 5 also includes the following steps: Step 51: At least three rows of simulated production pipe groups are arranged between adjacent similar coal pillars, and at least three rows of simulated production pipe groups are stacked and combined together to form the simulated coal seam; wherein, each row of the simulated production tube group is composed of a plurality of the simulated production tubes, and the simulated production tubes in two adjacent rows of the simulated production tube group are staggered set up.

Further, the simulated production pipe includes a first simulated production pipe and a second simulated production pipe, wherein the diameter of the first simulated production pipe is larger than the diameter of the second simulated production pipe; each row of the simulated production pipe group Each consists of multiple first simulated production pipes and second simulated production pipes; one second simulated production pipe is arranged between every two adjacent first simulated production pipes.

Further, the simulated production pipe includes a first simulated production pipe and a second simulated production pipe, wherein the diameter of the first simulated production pipe is larger than the diameter of the second simulated production pipe; the simulated production pipe group consists of The first simulated production pipe group consisting of a plurality of first simulated production pipes and the second simulated production pipe group composed of a plurality of second simulated production pipes; wherein, in every two rows of adjacent first A row of the second simulated production pipe group is arranged between the simulated production pipe groups.

Further, the simulated production pipe is a polyvinyl chloride pipe.

Further, multiple layers of the similar rock layers are poured above the simulated production pipe.

Further, it also includes step 6: when simulating the exploitation of the coal seam on site, collect the water pressure of the similar coal seam floor, similar coal pillar, simulated coal seam and similar rock layer through the data collection and processing equipment electrically connected with the test box, coal pressure and deformation data, and process the collected data.

Adopt above-mentioned technical scheme, have following beneficial effect:

The invention simulates the simulated coal seam to be mined by using the simulated mining pipe, and can well simulate the coal seam mining process on site.

The simulated mining pipe is set as a modified polyvinyl chloride pipe, which has the advantages of non-toxicity, high strength, and convenient processing. It can simulate coal seam mining, and has the characteristics of simple construction, flexible layout, and high compressive strength. , Stable and not easy to deform, can work with water.

Therefore, the simulation system and the simulation test method provided by the present invention can simulate the mining process of the coal seam, and can be used to study the damage and crack development process of the roof and floor rock mass and the seepage characteristic change and The study of evolution law is of great significance.

Description of drawings

Fig. 1 is the schematic diagram of the simulation system provided by the present invention;

Fig. 2 is a schematic diagram of gradually and uniformly extracting simulated mining pipes from a similar coal pillar on one side to a similar coal pillar on the other side;

Fig. 3 is a schematic diagram of extracting simulated production pipes at a uniform speed from a designated position between two similar coal pillars at the same time toward the direction of two similar coal pillars;

Fig. 4 is the schematic diagram of the simulated mining pipe layout in the simulated coal seam;

Fig. 5 is a flow chart of the simulation test method provided by the present invention.

Reference sign comparison table:

1-test box; 2-similar coal seam floor; 3-similar coal pillar;

4- simulated coal seam; 5- simulated mining pipe; 50- simulated mining pipe group;

51-the first simulated production pipe group; 52-the second simulated production pipe group;

53-the first simulated production pipe; 54-the second simulated production pipe; 6-similar rock layers;

7-Level the sand layer.

Detailed ways

The specific implementation manner of the present invention will be further described below in conjunction with the accompanying drawings. Wherein the same components are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "inner" and "outer ” refer to directions towards or away from the geometric center of a particular part, respectively.

As shown in FIGS. 1-3 , a simulation system for simulating coal seam mining provided by an embodiment of the present invention includes a test chamber 1 .

A similar coal seam floor 2 similar to the floor of the coal seam to be simulated mining is poured at the bottom of the test chamber 1 .

At least two similar coal pillars 3 similar to the coal pillars of the coal seam to be simulated mining are poured at intervals on the similar coal seam floor 2 .

A simulated coal seam 4 is arranged between two adjacent similar coal pillars 3, and the simulated coal seam 4 is composed of a plurality of simulated mining pipes 5 that can be extracted.

At least one layer of similar rock layer 6 similar to the upper rock layer of the coal seam to be simulated mining is poured above the simulated mining pipe 5 .

That is to say, the simulation system is mainly used to simulate the water-rock coupling model or the water-rock coupling simulation system of coal seam mining in reality. Water-rock coupling refers to the interaction of water and rock.

This simulation system comprises test box 1, has data collection and processing equipment (not shown in the figure) on test box 1, is used for collecting similar coal seam floor 2, similar coal pillar 3, simulated coal seam 4 and similar rock layer when simulating coal seam mining 5 water pressure, mine pressure, coal pressure, deformation and other data, and processed to guide coal seam mining combined with experimental data.

A similar coal seam floor 2 is poured at the bottom of the test chamber 1, which is similar to the floor of the coal seam to be simulated mining, that is, the similar coal seam floor 2 is formed in a certain proportion with the actual mining coal seam floor. The coal seam floor is made of similar materials.

At least two similar coal pillars 3 are poured at intervals on the similar coal seam floor 2, which are similar to the coal pillars of the coal seam to be simulated mining, that is, the similar coal pillars 3 are similar to the coal pillars in the actual mining coal seam. Scale molding, specifically crafted by using similar materials to coal pillars in real-life coal seams.

A simulated coal seam 4 is set between two adjacent similar coal pillars 3, which is used to simulate the coal seam in actual mining. The simulated coal seam 4 is composed of a plurality of simulated mining pipes 5 arranged, and the simulated mining pipes 5 can be extracted as required to simulate coal seam mining.

At least one layer of similar rock layer 6 is poured above the simulated coal seam 4 or the simulated mining pipe 5, which is similar to the upper rock layer of the coal seam to be simulated mining, that is, the similar rock layer 6 is similar to the rock above the coal seam of actual mining. Layers are shaped to a similar scale by using similar materials to the rock layers above real coal seams.

The similar coal seam floor 2, similar coal pillar 3 and similar rock layer 6 involved in the present invention are all structures or structures made of similar materials, because they are respectively different from the coal seam floor, coal pillar and rock layer in the coal seam of actual mining. The strength, hardness, structure, etc. are similar, so they are called coal seam floors, similar coal pillars and similar rock layers.

The above pouring sequence is, after the floor 2 of the similar coal seam meets the strength requirement, then the similar coal pillar 3 is poured. After the similar coal pillar 3 meets the strength requirements, the simulated coal seam 4 is arranged, and then the similar rock layer 6 is poured.

After the pouring of the similar rock layer 6 is completed and reaches the specified strength, the simulated excavation of the coal seam can be carried out.

Specifically, as shown in Figure 2, according to the preset time interval, the simulated mining pipe 5 can be collected from the similar coal pillar 3 on one side, and then transported to the similar coal pillar 3 on the other side to extract the simulated mining pipe 5 to simulate the scene Coal seam mining.

Alternatively, as shown in FIG. 3 , according to a preset time interval, the simulated mining pipe 5 is extracted at a uniform speed from a designated position between two similar coal pillars 3 at the same time toward the direction of the two similar coal pillars 3 .

The above preset time is similar to the actual excavation interval, that is, the preset time interval is set in a certain proportion to the actual excavation interval to meet the simulation effect.

The simulation system provided by the present invention can simulate the mining process of the field coal seam well by using the simulated mining pipe 5 to simulate the simulated coal seam 4 to be mined. Through the above-mentioned data collection and processing equipment, data such as water pressure, mine pressure, coal pressure, deformation, etc. of similar coal seam floor 2, similar coal pillar 3, simulated coal seam 4 and similar rock layer 5 can be collected and processed to combine experimental data Guide coal seam mining.

Under the condition of water-rock coupled physical model test, the simulation system provided by the present invention can simulate the coal seam mining method as realistically as possible, so as to study the damage and crack development process and evolution law of the roof and floor rock mass during the coal seam mining process under the condition of water conservation mining , the collapse mode of damaged rock mass and the change and evolution law of seepage characteristics of disturbed rock formations are of great significance to the research on related problems of distributed underground reservoirs in coal mines.

Extracting the simulated mining pipe 5 in the present invention is to extract the simulated mining pipe 5 from the test chamber 1 so that it no longer supports the similar rock layer 6 and simulates actual coal seam mining. It can be extracted from the test box 1 by machine, or manually.

Preferably, as shown in FIG. 1 , a leveling sand layer 7 is provided above the multiple simulated production pipes 5 for leveling the upper surfaces of the multiple simulated production pipes 5 to facilitate subsequent pouring of similar rock layers 6 .

Preferably, the leveling sand layer 7 is composed of medium-fine sand, which can fill the gaps between adjacent simulated production pipes 5 and level the upper surface.

Preferably, as shown in Figures 1-4, the simulated coal seam 4 includes at least three rows of simulated production pipe groups 50 extending towards the similar coal pillars 3 on both sides; the three rows of simulated production pipe groups 50 are stacked together.

Each row of simulated production pipe groups 50 is composed of a plurality of simulated production pipes 5, and the simulated production pipes 5 in two adjacent rows of simulated production pipe groups 50 are arranged alternately.

That is, the simulated coal seam 4 is vertically arranged with three rows of simulated production pipes 5 , and each row of simulated production pipes 5 is called a simulated production pipe group 50 . During arrangement, three rows of simulated production strings 50 are stacked together. Of course, as required, only one row of simulated production pipes 5 may be provided to form the simulated coal seam 4 .

The simulated production pipes 5 in the two adjacent rows of simulated production pipe groups 50 on the upper and lower layers are staggered, that is, there is a One simulated production pipe 5 in an upper layer or upper row of simulated production pipe group 50 . Therefore, when a simulated mining pipe 5 in the lower row is extracted, the adjacent simulated mining pipes 5 in the upper layer will move down accordingly, simulating the mining of the coal seam on site as much as possible.

Preferably, as shown in FIGS. 3-4 , the simulated production pipe 5 includes a first simulated production pipe 53 and a second simulated production pipe 54 , wherein the diameter of the first simulated production pipe 53 is larger than that of the second simulated production pipe 54 .

Each row of simulated production pipe group 50 is composed of a plurality of first simulated production pipes 53 and second simulated production pipes 54, wherein a second simulated production pipe 54 is arranged between every two adjacent first simulated production pipes 53 .

This is the first arrangement of the simulated production pipe group 50:

In each row of simulated production pipe group 50, the first simulated production pipe 53 and the second simulated production pipe 54 are arranged in a staggered manner. Since the diameters of the two are different, it is similar to the concave-convex part in the coal seam, and causes changes during extraction. Different, to better simulate the mining of live coal seams.

Preferably, the diameter of the first simulated production pipe 53 is 20 mm, and the diameter of the second simulated production pipe 54 is 16 mm.

Preferably, as shown in FIG. 4 , the simulated production pipe 5 includes a first simulated production pipe 53 and a second simulated production pipe 54 , wherein the diameter of the first simulated production pipe 53 is larger than that of the second simulated production pipe 54 . The simulated production pipe group 50 includes a first simulated production pipe group 51 composed of a plurality of first simulated production pipes 53 and a second simulated production pipe group 52 composed of a plurality of second simulated production pipes 54; wherein, every two rows A row of second simulated production pipe groups 52 is arranged between adjacent first simulated production pipe groups 51 .

This is the second arrangement of the simulated production pipe group 50:

The simulated production pipe group composed of multiple first simulated production pipes 53 is called the first simulated production pipe group 51; the simulated production pipe group composed of multiple second simulated production pipes 54 is called the second simulated production pipe group 52.

When combined, a row of second simulated mining tube groups 52 is arranged between every two rows of adjacent first simulated mining tube groups 51 to better simulate the mining of on-site coal seams, similar to the arrangement of coarse coal or fine coal in coal seams.

Preferably, the simulated production pipe 5 is a polyvinyl chloride pipe, specifically a modified polyvinyl chloride pipe. The simulated mining pipe is set as a modified polyvinyl chloride pipe, which has the advantages of non-toxicity, high strength, and convenient processing. It can simulate coal seam mining, and has the characteristics of simple construction, flexible layout, and high compressive strength. , Stable and not easy to deform, can work with water.

Preferably, as shown in FIG. 1 , multiple layers of similar rock layers 6 are poured above the simulated mining pipe 5 to better simulate the upper rock layers in real coal seams and better simulate coal seam mining.

Therefore, the simulation system provided by the present invention can simulate the coal seam mining process, and can study the damage and crack development process of the roof and floor rock mass and the change and evolution law of the seepage characteristics of the disturbed rock formation during the coal seam mining process under the condition of water conservation mining. is of great significance.

As shown in Figure 5, a kind of simulation test method that adopts above-mentioned simulation system to simulate coal seam mining that one embodiment of the present invention provides, comprises the following steps:

As shown in Figures 1-4, step 1: pouring a similar coal seam floor 2 similar to the floor of the coal seam to be simulated mining is poured at the bottom of the test chamber 1.

Step 2: Pour at least two similar coal pillars 3 that are similar to the coal pillars of the coal seam to be simulated to be mined at intervals on the similar coal seam floor 2 .

Step 3: After the similar coal seam floor 2 and similar coal pillars 3 meet the strength requirements, a simulated coal seam 4 is arranged between two adjacent similar coal pillars 3, and the simulated coal seam 4 is arranged by a plurality of simulated mining pipes 5 that can be extracted composition.

Step 4: pouring at least one layer of similar rock layer 6 similar to the upper rock layer of the coal seam to be simulated mining above the simulated mining pipe 5 .

Step 5: After the similar rock layer 6 meets the strength requirements, the simulated mining pipe 5 is pulled at a constant speed according to a preset time interval to simulate the mining of the coal seam on site.

That is to say, the simulation test method is realized by adopting the following technical scheme:

1. Simulated coal seam masonry:

During the pouring process of the model test, the floor 1 of the similar coal seam and the similar coal pillar 2 are poured according to a certain similar proportion.

After pouring is completed and similar materials have initial strength, the simulated coal seam 4 can be laid.

A plurality of simulated mining pipes 5 are arranged in a staggered manner and piled up to form a stable accumulation body of a certain height to simulate the on-site coal seam.

2. Pouring of similar rock formations:

Pouring of a similar rock layer 6 is performed above the simulated coal seam 4 or a plurality of simulated production pipes 5 .

3. Coal seam mining simulation:

After all the pouring of the similar rock layer 4 is completed and reaches the specified strength, the simulated excavation of the coal seam can be carried out. Specifically, pumping the simulated mining pipe 5 at a uniform speed according to preset time intervals can simulate on-site coal seam mining.

The simulated test method provided by the present invention can simulate the mining process of the field coal seam well by using the simulated mining pipe 5 to simulate the simulated coal seam 4 to be mined. Through the above-mentioned data collection and processing equipment, data such as water pressure, mine pressure, coal pressure, deformation, etc. of similar coal seam floor 2, similar coal pillar 3, simulated coal seam 4 and similar rock layer 5 can be collected and processed to combine experimental data Guide coal seam mining.

Preferably, in step 2, the following steps are also included:

Step 21: Arrange the leveling sand layer 7 on the multiple simulated production pipes 5, and then perform the operation of step 3 after the upper surface of the multiple simulated production pipes 5 is stacked and formed by the leveling sand layer 7 and leveled. The leveling sand layer 7 is preferably composed of medium-fine sand, which can fill the gaps between adjacent simulated production pipes 5 and level the upper surface to facilitate subsequent pouring of similar rock layers 6 .

Preferably, the simulated production pipe 5 in step 5 is extracted in the following manner: as shown in Figure 2, the simulated production pipe 5 is extracted at a uniform speed from the similar coal pillar 3 on one side to the similar coal pillar 3 on the other side, To simulate on-site coal seam mining one way.

Preferably, the simulated mining pipe in step 5 is extracted in the following manner: as shown in Figure 3, the simulated mining pipe is extracted at a uniform speed from a specified position between two similar coal pillars 3 at the same time towards the direction of two similar coal pillars 3 Pipe 5, to simulate another way of field coal seam mining.

Preferably, step 5 also includes the following steps: as shown in Figure 1-3,

Step 51 : At least three rows of simulated production pipe groups 50 are arranged between adjacent similar coal pillars 3 , and at least three rows of simulated production pipe groups 50 are stacked together to form a simulated coal seam 4 .

Wherein, each row of simulated production tube groups 50 is composed of a plurality of simulated production tubes 5, and the simulated production tubes 5 in two adjacent rows of simulated production tube groups 50 are arranged alternately.

That is, the simulated coal seam 4 is set to have three rows of simulated production pipes 5 vertically arranged, and each row of simulated production pipes 5 is called a simulated production pipe group 50 . During arrangement, three rows of simulated production strings 50 are stacked together. Of course, as required, only one row of simulated production pipes 5 may be provided to form the simulated coal seam 4 .

The simulated production pipes 5 in the two adjacent rows of simulated production pipe groups 50 on the upper and lower layers are staggered, that is, there is a One simulated production pipe 5 in an upper layer or upper row of simulated production pipe group 50 . Therefore, when a simulated mining pipe 5 in the lower row is extracted, the adjacent simulated mining pipes 5 in the upper layer will move down accordingly, simulating the mining of the coal seam on site as much as possible.

Preferably, as shown in FIGS. 3-4 , the simulated production pipe 5 includes a first simulated production pipe 53 and a second simulated production pipe 54 , wherein the diameter of the first simulated production pipe 53 is larger than that of the second simulated production pipe 54 .

Each row of simulated production pipe group 50 is composed of a plurality of first simulated production pipes 53 and second simulated production pipes 54; wherein, a second simulated production pipe is arranged between every two adjacent first simulated production pipes 53. Tube 54.

This is the first arrangement of the simulated production pipe group 50:

In each row of simulated production pipe group 50, the first simulated production pipe 53 and the second simulated production pipe 54 are arranged in a staggered manner. Since the diameters of the two are different, it is similar to the concave-convex part in the coal seam, and causes changes during extraction. Different, to better simulate the mining of live coal seams.

Preferably, the diameter of the first simulated production pipe 53 is 20 mm, and the diameter of the second simulated production pipe 54 is 16 mm.

Preferably, as shown in FIG. 4 , the simulated production pipe 50 includes a first simulated production pipe 53 and a second simulated production pipe 54 , wherein the diameter of the first simulated production pipe 53 is larger than that of the second simulated production pipe 54 .

The simulated production pipe group 50 includes a first simulated production pipe group 51 composed of a plurality of first simulated production pipes 53 and a second simulated production pipe group 52 composed of a plurality of second simulated production pipes 54 .

Wherein, a row of second simulated production pipe group 52 is arranged between every two adjacent rows of first simulated production pipe group 51 .

This is the second arrangement of the simulated production pipe group 50:

The simulated production pipe group composed of multiple first simulated production pipes 53 is called the first simulated production pipe group 51; the simulated production pipe group composed of multiple second simulated production pipes 54 is called the second simulated production pipe group 52.

When combined, a row of second simulated mining tube groups 52 is arranged between every two rows of adjacent first simulated mining tube groups 51 to better simulate the mining of on-site coal seams, similar to the arrangement of coarse coal or fine coal in coal seams.

Preferably, the simulated production pipe 5 is a polyvinyl chloride pipe, specifically a modified polyvinyl chloride pipe. The simulated mining pipe is set as a modified polyvinyl chloride pipe, which has the advantages of non-toxicity, high strength, and convenient processing. It can simulate coal seam mining, and has the characteristics of simple construction, flexible layout, and high compressive strength. , Stable and not easy to deform, can work with water.

Preferably, multiple layers of similar rock layers 6 are poured above the simulated mining pipe 5 to better simulate the upper rock layers in real coal seams and better simulate coal seam mining.

Preferably, step 6 is also included: when simulating on-site coal seam mining, collect similar coal seam floor 2, similar coal pillar 3, simulated coal seam 4 and Similar to the water pressure, coal pressure and deformation data of rock layer 5, and process the collected data to guide coal seam mining in combination with experimental data. The aforementioned data collection and processing equipment may be computer equipment. The collected data are used to study the damage and crack development process of the roof and floor rock mass and the change and evolution law of the seepage characteristics of the disturbed rock formation during the mining process of the coal seam under the condition of water conservation mining, which has important guiding significance for actual coal mining.

According to needs, the above technical solutions can be combined to achieve the best technical effect.

What has been described above is only the principles and preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, on the basis of the principle of the present invention, several other modifications can also be made, which should also be regarded as the protection scope of the present invention.

Claims (18)

1. for simulating a simulation system for seam mining, it is characterized in that, comprising chamber,

The similar seat earth similar to the base plate in the described coal seam for the treatment of simulation mining is built in the bottom of described chamber;

On described similar seat earth, at least two similar coal columns similar to the coal column in the described coal seam for the treatment of simulation mining are built in compartment of terrain;

Between adjacent two described similar coal columns, be provided with simulation coal seam, described simulation coal seam is rearranged by the simulation mining pipe that many can be extracted;

The similar lithosphere that at least one deck is similar to the top lithosphere in the described coal seam for the treatment of simulation mining is built above described simulation mining pipe.

2. simulation system according to claim 1, is characterized in that, above many described simulation mining pipes, be provided with levelling layer of sand.

3. simulation system according to claim 1, is characterized in that, described levelling layer of sand is made up of middle fine sand.

4. simulation system according to claim 1, is characterized in that, described simulation coal seam includes at least three rows respectively towards the simulation mining pipe group that the described similar coal column of both sides extends;

The described simulation mining pipe group stacked combination of three rows together;

Often arrange described simulation mining pipe group to be made up of many described simulation mining pipes, and the described simulation mining pipe of the adjacent described simulation mining Guan Zuzhong of two rows is crisscross arranged.

5. simulation system according to claim 4, is characterized in that, described simulation mining pipe comprises the first simulation mining pipe and the second simulation mining pipe, and the diameter of wherein said first simulation mining pipe is greater than the diameter of described second simulation mining pipe;

Often arrange described simulation mining pipe group by many described first simulation mining pipes and described second simulation mining pipe composition, between wherein often adjacent two described first simulation mining pipes, be furnished with a described second simulation mining pipe.

6. simulation system according to claim 4, is characterized in that, described simulation mining pipe comprises the first simulation mining pipe and the second simulation mining pipe, and the diameter of wherein said first simulation mining pipe is greater than the diameter of described second simulation mining pipe;

Described simulation mining pipe group comprises the first simulation mining pipe group be made up of many described first simulation mining pipes and the second simulation mining pipe group be made up of many described second simulation mining pipes;

Wherein, the described second simulation mining pipe group of a row is furnished with between the described first simulation mining pipe group that every two rows are adjacent.

7. simulation system according to claim 1, is characterized in that, described simulation mining pipe is polyvinyl chloride pipe.

8. simulation system according to claim 1, is characterized in that, has built similar lithosphere described in multilayer above described simulation mining pipe.

9. adopt simulation system according to claim 1 to simulate a simulation experiment method for seam mining, it is characterized in that, comprise the steps:

Step 1: build the similar seat earth similar to the base plate in the described coal seam for the treatment of simulation mining in the bottom of chamber;

Step 2: build the similar coal column that the coal column at least two spaced described coal seams to treating simulation mining is similar on described similar seat earth;

Step 3: after described similar seat earth meets requirement of strength with described similar coal column, between adjacent two described similar coal columns, arrange simulation coal seam, described simulation coal seam is rearranged by the simulation mining pipe that many can be extracted;

Step 4: build the similar lithosphere that at least one deck is similar to the top lithosphere in the described coal seam for the treatment of simulation mining above described simulation mining pipe;

Step 5: after described similar lithosphere meets requirement of strength, at the uniform velocity twitches described simulation mining pipe according to prefixed time interval, the exploitation in simulated field coal seam.

10. simulation experiment method according to claim 9, is characterized in that, also comprises the steps: in described step 2

Step 21: arrange levelling layer of sand on many described simulation mining pipes, many described simulation mining pipes are piled up shaping after upper surface levelling by described levelling layer of sand after, then carry out the operation of described step 3.

11. simulation experiment methods according to claim 9, is characterized in that, the described simulation mining pipe in described step 5 is extracted as follows:

Described simulation mining pipe is at the uniform velocity extracted from the described similar coal column of side towards the described similar coal column place of opposite side.

12. simulation experiment methods according to claim 9, is characterized in that, the described simulation mining pipe in described step 5 is extracted as follows:

At the uniform velocity extract described simulation mining pipe towards the direction of two described similar coal columns from the specified location between two described similar coal columns simultaneously.

13. simulation experiment methods according to claim 9, is characterized in that, also comprise the steps: in described step 5

Step 51: be furnished with at least three row's simulation mining pipe groups between adjacent described similar coal column, by the described simulation mining pipe group stacked combination of at least three rows together to form described simulation coal seam;

Wherein, often arrange described simulation mining pipe group and be made up of many described simulation mining pipes, and the described simulation mining pipe of the described simulation mining Guan Zuzhong of adjacent two rows is crisscross arranged.

14. simulation experiment methods according to claim 13, is characterized in that, described simulation mining pipe comprises the first simulation mining pipe and the second simulation mining pipe, and the diameter of wherein said first simulation mining pipe is greater than the diameter of described second simulation mining pipe;

Often arrange described simulation mining pipe group by many described first simulation mining pipes and described second simulation mining pipe composition;

Wherein between often adjacent two described first simulation mining pipes, be furnished with a described second simulation mining pipe.

15. simulation experiment methods according to claim 13, is characterized in that, described simulation mining pipe comprises the first simulation mining pipe and the second simulation mining pipe, and the diameter of wherein said first simulation mining pipe is greater than the diameter of described second simulation mining pipe;

Described simulation mining pipe group comprises the first simulation mining pipe group be made up of many described first simulation mining pipes and the second simulation mining pipe group be made up of many described second simulation mining pipes;

Wherein, between the described first simulation mining pipe group that every two rows are adjacent, the described second simulation mining pipe group of a row is furnished with.

16. simulation experiment methods according to claim 9, is characterized in that, described simulation mining pipe is polyvinyl chloride pipe.

17. simulation experiment methods according to claim 9, is characterized in that, have built similar lithosphere described in multilayer above described simulation mining pipe.

18. simulation experiment methods according to claim 9, it is characterized in that, also comprise step 6: when the exploitation in simulated field coal seam, by collecting described similar seat earth with the data collection process equipment that described chamber is electrically connected, similar coal column, the hydraulic pressure of simulating coal seam and similar lithosphere, coal press and deformation data, and process the described data collected.