CN113202463B - Physical simulation experiment device for combined mining of coal bed gas of multiple coal beds - Google Patents
Physical simulation experiment device for combined mining of coal bed gas of multiple coal beds Download PDFInfo
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- 239000003245 coal Substances 0.000 title claims abstract description 127
- 238000004088 simulation Methods 0.000 title claims abstract description 95
- 238000005065 mining Methods 0.000 title claims abstract description 21
- 238000002474 experimental method Methods 0.000 claims abstract description 51
- 239000011435 rock Substances 0.000 claims abstract description 50
- 238000000605 extraction Methods 0.000 claims abstract description 17
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 13
- 230000002093 peripheral effect Effects 0.000 claims abstract description 11
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 36
- 238000009499 grossing Methods 0.000 claims description 16
- 230000003068 static effect Effects 0.000 claims description 15
- 230000002457 bidirectional effect Effects 0.000 claims description 13
- 238000009434 installation Methods 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 230000033001 locomotion Effects 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 4
- 230000002146 bilateral effect Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000036544 posture Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000009423 ventilation Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims 2
- 238000005056 compaction Methods 0.000 claims 1
- 239000007921 spray Substances 0.000 claims 1
- 238000004080 punching Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 2
- GQWNECFJGBQMBO-UHFFFAOYSA-N Molindone hydrochloride Chemical compound Cl.O=C1C=2C(CC)=C(C)NC=2CCC1CN1CCOCC1 GQWNECFJGBQMBO-UHFFFAOYSA-N 0.000 description 1
- 241000826860 Trapezium Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- E21—EARTH OR ROCK DRILLING; MINING
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- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
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Abstract
The invention discloses a physical simulation experiment device for combined mining of coal bed gas of multiple coal beds, which comprises: the device comprises a simulation pedestal, an experiment simulation box, a peripheral extraction device, a stamping flattening assembly, a main bearing column and an air supply device, wherein the middle part of the upper end face of the simulation pedestal is provided with the experiment simulation box, a coal rock sample is filled in the experiment simulation box through an upper port, the main bearing column is vertically arranged on one side of the upper end face of the simulation pedestal, and the main bearing column is horizontally provided with a connecting end cover through a cross beam; the utility model discloses a coal petrography sample, including connection end cover, connecting end cover, punching simulation case piece, gas supply device, connecting end cover, the vertical peripheral hardware that runs through in up end face middle part of connection end cover is taken out and is provided with the device that takes out, just, but the coaxial punching press that is provided with of the inside downside of connection end cover relative rotation smooths the subassembly, it still is provided with gas supply device to lie in coal petrography sample middle part in the experiment simulation case piece, gas supply device is used for evenly injecting the coal bed gas to the coal petrography sample for the coal bed gas concentration in the coal petrography sample reaches experiment and adopts the row value.
Description
Technical Field
The invention belongs to the technical field of coal bed gas drainage and mining simulation equipment, and particularly relates to a physical simulation experiment device for multi-coal bed gas combined mining.
Background
The coal bed gas resources in China are rich, the coal bed can experience complex structure movement in the deposition process, when the coal rank is high, the permeability of the coal bed is low, meanwhile, the mining process is influenced by the pressure-sensitive effect of a reservoir stratum, and the selection of an appropriate drainage and mining technology and the establishment of an appropriate drainage and mining degree are widely concerned. At present, a device for reducing the drainage and production of a coal bed gas well is generally adopted in most cases, and in a laboratory, because the coal sample is not subjected to fracturing treatment before the experiment, the coal sample cannot be very close to the state of a coal reservoir (temperature, pressure and water-containing condition), so that the experimental result has large errors; and, especially to the coal seam reduction experiment of the different degree of depth, in actual earth's surface, be in different coal bed gas extraction high-order, receive the inside compactness effect influence of coal stratum for the velocity diverse that is presented of methane gas's adsorption and desorption, and because the experimental apparatus among the prior art can not really reduce coal stratum geological environment, lead to lack scientific foundation in the commingling mining experiment, do not possess convincing authoritativeness. Therefore, the technical personnel in the field provide a physical simulation experimental device for co-production of coal bed gas in multiple coal beds so as to solve the problems in the background technology.
Disclosure of Invention
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a many coal seams coal bed gas closes adopts physical simulation experimental apparatus, it includes: the device comprises a simulation pedestal, an experiment simulation box, an external extraction device, a stamping flattening assembly, a main bearing column and an air supply device, wherein the middle part of the upper end face of the simulation pedestal is provided with the experiment simulation box, the upper end face of the experiment simulation box is provided with a port for storing and taking a coal rock sample, the experiment simulation box is filled with the coal rock sample through an upper port, and the coal rock sample simulates a deep or shallow static coal rock layer; a main bearing column is vertically arranged on one side of the upper end face of the simulation pedestal, and a connecting end cover is horizontally erected on the main bearing column through a cross beam;
the connecting end cover is in sliding fit connection with the experimental simulation box piece;
a peripheral extraction device vertically penetrates through the middle of the upper end face of the connecting end cover and performs extraction simulation work on coal bed gas in the coal rock sample in the experimental simulation box;
the lower side of the inside of the connecting end cover can be coaxially and relatively rotated and is provided with a stamping flattening assembly, and the stamping flattening assembly is used for locally stamping a coal rock sample inside the connecting end cover after the connecting end cover is hermetically connected with an experiment simulation box piece, so that the coal rock sample is in different arrangement compactness to carry out a commingled production simulation experiment;
be located coal petrography sample middle part still and be provided with gas supply unit in the experiment simulation case spare, gas supply unit is used for evenly injecting coal bed gas to coal petrography sample for coal bed gas concentration in the coal petrography sample reaches experiment and adopts the row value.
Further, preferably, the main bearing column is a column body structure with a two-section type retractable cross section, a hydraulic telescopic cylinder is coaxially arranged in the main bearing column, and vertical lifting adjustment is performed by the telescopic action of the hydraulic telescopic cylinder;
and, keep away from on the link lid one side slope of main bearing post installs the blast pipe, the sealed one end of blast pipe runs through on the link lid, the other end and the peripheral hardware pump spare of blast pipe are linked together for absorb the coal bed gas that overflows in the coal petrography sample in the experiment simulation case spare and arrange outward.
Preferably, the lower side of the interior of the experimental simulation box piece can be relatively rotatably and transversely provided with a bidirectional screw piece through a bearing, the bidirectional screw piece is driven to rotate by a micro motor arranged outside the experimental simulation box piece, the bidirectional screw piece is symmetrically provided with guide pieces which can relatively slide under the action of thread meshing transmission, and each guide piece is hinged with a top support plate;
two side supporting pieces I are symmetrically hinged to two sides of the inner wall of the experimental simulation box, side supporting pieces II are hinged to the positions, corresponding to the side supporting pieces I, on the top supporting plate, and one end of each side supporting piece I is hinged to the corresponding side supporting piece II;
the inner wall of the experimental simulation box is positioned below the first side support piece and is rotatably connected with an adjustable telescopic rod, and the output end of the adjustable telescopic rod is connected with hinge shafts of the first side support piece and the second side support piece; when the guide part slides and is adjusted along the bidirectional screw part, the adjustable telescopic rod correspondingly stretches and regulates, so that the top support plate can be in various inclined plane support frame postures in the experimental simulation box.
Further, preferably, the cross section of the top support plate is of a multi-section telescopic structure.
Further, preferably, the stamping flattening assembly comprises an outer guide ring piece, a rotary disc body, a mounting bracket, a sliding screw rod and a flattening device, wherein the outer guide ring piece is coaxially fixed inside the connecting end cover, the rotary disc body is arranged in the outer guide ring piece in a manner that the outer guide ring piece can relatively rotate through a built-in rotor, and the rotary disc body is rotationally driven by an external motor arranged on the connecting end cover;
a mounting bracket is transversely fixed on the rotating disc body, a sliding lead screw is arranged in the mounting bracket, and a lower smoothing device is connected on the sliding lead screw in a sliding manner;
the lower smoothing device performs circular rotation motion around the axis of the connecting end cover under the rotation action of the rotating disc body and can transversely slide along the sliding lead screw to adjust and smooth the outer diameter of the working face.
Further, preferably, the lower smoothing device further comprises a main rotating wheel, a sliding guide, a fixing kit, a driving guide seat and an inner roller; the upper side of the inside of the fixed sleeve is provided with a main rotating wheel in a limiting way capable of rotating relatively, a transmission shaft is hinged on the main rotating wheel, a sliding guide part is arranged on the fixed sleeve in a sliding and penetrating way, one end of the sliding guide part is hinged with the transmission shaft, and the sliding guide part is driven to slide vertically under the rotating action of the main rotating wheel;
the lower end of the sliding guide piece is connected with a driving guide seat, the driving guide seat is symmetrically and rotatably provided with inner rolling shafts through an outer support, and a transmission belt is sleeved between the inner rolling shafts and the driving guide seat.
Preferably, a plurality of sets of connection springs are further provided between the sliding guide and the driving guide.
Further, preferably, the gas supply device comprises a mounting main pipe, a diversion guide member, an outer casing member, an inner diversion plate and an injection nozzle; the installation main pipe vertically penetrates through the lower side of the middle part of the experiment simulation box piece, one end of the installation main pipe is communicated with an external air supply pump piece, and the other end of the installation main pipe is communicated with a flow distribution guide piece in a bilateral symmetry mode;
an outer casing body part is sleeved at the port outlet of each flow dividing guide part, an inner flow dividing disc is coaxially fixed in the outer casing body part, a plurality of exhaust concave positions are arranged on the circumference of the inner flow dividing disc, and an injection nozzle is arranged in each exhaust concave position;
a plurality of ventilation hole sites are arranged on the outer wrapping body in a circumferential array mode.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the coal rock sample is loaded through the experiment simulation box, the deep or shallow static coal rock layer is simulated by the coal rock sample, and the combined mining experiment work is carried out through the external extraction device; in order to improve the reduction effect of the experimental simulation coal rock geological environment, the coal rock sample in the experimental simulation box can be compacted or injected according to the content concentration of coal bed gas in the surface of the actual coal rock and the internal compactness of the coal rock stratum, and the stamping flattening assembly and the gas supply device are respectively arranged to achieve the two simulated reduction effects; the top support plates are symmetrically arranged in the experiment simulation box, and the static cross-sectional shapes (such as triangle, trapezoid, rectangle and the like) of the coal rock samples can be effectively changed through the adjusting action of the top support plates, so that the compactness and the coal bed gas content of different high positions in the static coal rock layers of the coal rock samples can be controlled, and the purpose of simulating the multi-coal-bed combined mining experiment can be achieved.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a schematic view of the main support post of the present invention;
FIG. 3 is a schematic structural diagram of an experimental simulation box of the present invention;
FIG. 4 is a schematic structural view of a punch smoothing assembly of the present invention;
FIG. 5 is a schematic structural view of a lower smoothing device according to the present invention;
FIG. 6 is a schematic view of the structure of the gas supply apparatus according to the present invention;
in the figure: the device comprises a simulation pedestal 1, an experimental simulation box member 2, a 201 top support plate, a 202 bidirectional screw member, a 203 micro motor, a 204 side support member I, a 205 adjustable telescopic rod, a 3 main bearing column, a 301 hydraulic telescopic cylinder, a 4 connecting end cover, a 401 exhaust pipe, a 5 external extraction device, a 6 stamping flattening component, a 601 external guide ring member, a 602 rotary disc body, a 603 sliding lead screw, a 7 air supply device, a 701 installation main pipe, a 702 flow dividing guide member, a 703 external guide member, a 704 internal flow dividing disc, a 705 injection nozzle, an 8 lower flattening device, an 801 fixing kit, an 802 main rotary wheel, a 803 sliding guide member, a 804 driving guide seat, a 805 external support, 806 internal rolling shaft and 807 connecting springs.
Detailed Description
Referring to fig. 1, in an embodiment of the present invention, an experimental apparatus for physical simulation of coal seam gas co-production in multiple coal seams includes: the device comprises a simulation pedestal 1, an experiment simulation box 2, a peripheral extraction device 5, a stamping flattening assembly 6, a main bearing column 3 and an air supply device 7, wherein the experiment simulation box 2 is mounted in the middle of the upper end face of the simulation pedestal 1, a port for storing and taking a coal rock sample is arranged on the upper end face of the experiment simulation box 2, the coal rock sample is filled in the experiment simulation box 2 through an upper port, and the coal rock sample simulates a deep static coal rock layer or a shallow static coal rock layer; a main bearing column 3 is vertically arranged on one side of the upper end face of the simulation pedestal 1, and a connecting end cover 4 is horizontally erected on the main bearing column 3 through a cross beam;
the connecting end cover 4 is in sliding fit connection with the experiment simulation box 2;
a peripheral extraction device 5 vertically penetrates through the middle of the upper end face of the connecting end cover 4, and the peripheral extraction device 5 performs extraction simulation work on the coal bed gas in the coal rock sample in the experiment simulation box 2;
the lower side in the connecting end cover 4 can be coaxially and relatively rotated, a stamping smoothing component 6 is arranged, and the stamping smoothing component 6 is used for locally stamping a coal rock sample in the connecting end cover 4 after the connecting end cover 4 is hermetically connected with the experiment simulation box 2, so that the coal rock sample is in different arrangement compactness for carrying out a commingled mining simulation experiment;
the middle of the coal rock sample in the experiment simulation box component 2 is also provided with an air supply device 7, the air supply device 7 is used for uniformly injecting coal bed gas into the coal rock sample, so that the concentration of the coal bed gas in the coal rock sample reaches an experiment mining and discharging value, the concentration of the coal bed gas content of the coal rock sample is generally detected firstly, the air supply device injects air into the low-content coal rock sample area, the static coal rock layer formed by the coal rock sample can reduce the concentration of the real earth surface coal bed gas, the static coal rock layer is flattened and stamped by the stamping flattening component, the compactness of the internal coal rock can reach the effect of reducing the coal bed gas permeation, the reduction simulation work is realized, and the co-mining simulation is performed by an extraction device.
Referring to fig. 2, in the embodiment, the main receiving column 3 is a column structure with a two-section retractable cross section, and a hydraulic telescopic cylinder 301 is coaxially arranged in the main receiving column 3, and vertical lifting adjustment is performed by the telescopic action of the hydraulic telescopic cylinder 301;
and, keep away from on the connecting end cover 4 the blast pipe 401 is installed to the one side slope of main support post 3, the sealed one end that runs through of one end of blast pipe 401 is in on the connecting end cover 4, the other end and the peripheral hardware pump spare (not shown in the figure) of blast pipe 401 are linked together for coal bed gas that overflows among the coal petrography sample in experimental simulation case spare 2 absorbs outer row, prevents that outer row of coal bed gas from influencing sanitation, reduces experiment economic loss simultaneously, can collect the utilization to coal bed gas.
Referring to fig. 3, in the embodiment, a bidirectional screw 202 is transversely installed on the lower side of the inside of the experimental simulation box 2 through a bearing in a relatively rotatable manner, the bidirectional screw 202 is driven to rotate by a micro motor 203 installed outside the experimental simulation box 2, guide members are symmetrically arranged on the bidirectional screw 202 in a relatively slidable manner through a thread engagement transmission effect, and each guide member is hinged with a top support plate 201;
moreover, two side supporting pieces I204 are symmetrically hinged to two sides of the inner wall of the experimental simulation box 2, a side supporting piece II is hinged to the top supporting plate 201 at a position corresponding to the side supporting piece I204, and one end of the side supporting piece I204 is hinged to the side supporting piece II;
the inner wall of the experimental simulation box 2 is positioned below the first side support 204 and is rotatably connected with an adjustable telescopic rod 205, and the output end of the adjustable telescopic rod 205 is connected with hinge shafts of the first side support 204 and the second side support; when the guide part slides and is adjusted along the bidirectional screw 202, the adjustable telescopic rod 205 correspondingly stretches and regulates, so that the top support plate 201 can present various inclined plane support frame postures in the experimental simulation box; specifically, when the two top support plates are vertically arranged in the experiment simulation box in parallel, the section of the static coal strata is rectangular, the upper surface of the static coal strata is stamped through the stamping flattening assembly, so that the coal strata at different heights can have the same compactness, and the gas supply device injects gas inwards to uniformly diffuse the coal bed gas to all areas so as to simulate a shallow commingled production experiment; when two top position extension boards are when internal slope through the sliding action of guide, the static coal seam layer becomes the cross-section for falling triangle or falling trapezium structure this moment, smooths the subassembly through the punching press and carries out the punching press to its upper surface for the coal seam layer of high-order is compared in low level coal seam layer and is loose state, and the internal gas injection of gas supply unit can make during the coal bed gas polydiffusion high-order coal seam layer, with simulation middle part degree of depth closes adopts experiment etc..
In this embodiment, the cross section of the top supporting plate 201 is a multi-section telescopic structure.
Referring to fig. 4, in the present embodiment, the stamping flattening assembly 6 includes an outer guide ring 601, a rotating disc 602, a mounting bracket, a sliding lead screw 603, and a flattening device 8, wherein the outer guide ring 601 is coaxially fixed inside the connecting end cover 4, a rotating disc 602 is relatively rotatably disposed inside the outer guide ring 601 through a built-in rotor, and the rotating disc 602 is rotationally driven by an external motor mounted on the connecting end cover 4;
a mounting bracket is transversely fixed on the rotating disc body 602, a sliding lead screw 603 is arranged in the mounting bracket, and a lower smoothing device 8 is connected on the sliding lead screw 603 in a sliding manner;
the lower smoothing device 8 performs circular rotation motion around the axis of the connecting end cover 4 under the rotation action of the rotating disc body 602, can perform transverse sliding along the sliding lead screw 603 to adjust and smooth the outer diameter of a working surface, and can effectively perform uniform stamping on a coal rock sample.
Referring to fig. 5, in the present embodiment, the smoothing device 8 further includes a main rotating wheel 802, a sliding guide 803, a fixing assembly 801, a driving guide 804, and an inner roller 806; the fixing sleeve 801 is provided with a main rotating wheel 802 at a position which can rotate relatively at the upper side inside, a transmission shaft is hinged on the main rotating wheel 802, a sliding guide 803 is slidably arranged on the fixing sleeve in a penetrating manner, one end of the sliding guide 803 is hinged with the transmission shaft, and the sliding guide 803 is driven by the rotating action of the main rotating wheel 802 to slide vertically;
the lower end of the sliding guide member 803 is connected with a driving guide seat 804, the driving guide seat 804 is symmetrically and rotatably provided with inner rollers 806 through an outer bracket 805, and a transmission belt is sleeved between the inner rollers 806 and the driving guide seat 804.
As a preferred embodiment, a plurality of sets of connection springs 807 are further connected between the sliding guide 803 and the driving guide 804, wherein it should be noted that the transmission belt on the inner roller is always in abutting contact with the surface of the coal rock sample, and the downward reciprocating impact of the sliding guide achieves the elastic and vibration effect through the connection springs, thereby achieving the adjustment of the internal compactness of the coal rock sample.
Referring to fig. 6, in the present embodiment, the gas supply device 7 includes a main installation pipe 701, a diversion guide 702, an outer trunk 703, an inner diversion plate 704, and an injection nozzle 705; the installation main pipe 701 vertically penetrates through the lower side of the middle part of the experimental simulation box component 2, one end of the installation main pipe 701 is communicated with an external air supply pump component (not shown in the figure), and the other end of the installation main pipe 701 is communicated with a flow distribution guide component 702 in a bilateral symmetry manner;
an outer casing body member 703 is sleeved at a port of each flow dividing guide member 702, an inner flow dividing disc 704 is coaxially fixed in the outer casing body member 703, a plurality of exhaust concave positions are arranged on the upper circumference of the inner flow dividing disc 704, and an injection nozzle 705 is arranged in each exhaust concave position;
a plurality of vent holes are circumferentially arrayed on the outer casing member 703.
Specifically, in a coalbed methane co-production simulation experiment, a coalbed methane sample is filled in an experiment simulation box, the cross section shape of a static coalbed methane layer is changed by adjusting the inclined position of a top support plate, so that the coalbed methane can be adjusted and controlled in a later period according to the depth of the actual surface coalbed methane layer, the compactness and the coalbed methane content of different high positions in the static coalbed methane layer of the coalbed methane sample can be controlled, the experiment simulation box is hermetically covered and connected through a connecting end cover, the coalbed methane is supplied to each injection nozzle through an installation main pipe, so that the coalbed methane is dispersed in the coalbed methane sample, meanwhile, a lower leveling device on the connecting end cover impacts and compacts the surface of the coalbed methane sample to achieve the compactness of the coal bed methane layer in real surface reduction, an exhaust pipe absorbs and exhausts the coalbed methane overflowing from the coalbed methane sample in the experiment box, and finally, an external extraction device performs co-production experiment work; the static cross-sectional shape of the coal rock sample can be changed by adjusting different inclined positions of the opposite top support plate so as to simulate the combined mining of multiple coal seams.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (5)
1. The utility model provides a many coal seams coal bed gas closes adopts physical simulation experimental apparatus, it includes: the device comprises a simulation pedestal (1), an experiment simulation box (2), a peripheral extraction device (5), a stamping flattening assembly (6), a main bearing column (3) and an air supply device (7), wherein the experiment simulation box (2) is mounted in the middle of the upper end face of the simulation pedestal (1), a port for storing and taking a coal rock sample is arranged on the upper end face of the experiment simulation box (2), the coal rock sample is filled in the experiment simulation box (2) through the upper port, and the coal rock sample simulates a deep or shallow static coal rock layer; the method is characterized in that: a main bearing column (3) is vertically arranged on one side of the upper end face of the simulation pedestal (1), and a connecting end cover (4) is horizontally erected on the main bearing column (3) through a cross beam;
the connecting end cover (4) is in sliding fit connection with the experiment simulation box (2);
a peripheral extraction device (5) vertically penetrates through the middle of the upper end face of the connecting end cover (4), and the peripheral extraction device (5) performs extraction simulation work on coal bed gas in the coal rock sample in the experiment simulation box piece (2);
the stamping flattening component (6) is coaxially arranged on the lower side of the inside of the connecting end cover (4) in a relatively rotating mode, and the stamping flattening component (6) locally stamps coal and rock samples in the connecting end cover (4) after the connecting end cover (4) is in sealing connection with the experiment simulation box piece (2), so that the coal and rock samples are distributed in different compaction degrees to perform a commingled mining simulation experiment;
the middle part of the coal rock sample in the experiment simulation box piece (2) is also provided with an air supply device (7), and the air supply device (7) is used for uniformly injecting coal bed gas into the coal rock sample so that the concentration of the coal bed gas in the coal rock sample reaches an experiment mining and discharging value;
the lower side in the experiment simulation box (2) can be relatively rotatably and transversely provided with a bidirectional screw (202) through a bearing, the bidirectional screw (202) is driven to rotate by a micro motor (203) arranged outside the experiment simulation box (2), the bidirectional screw (202) is symmetrically provided with guide pieces which can slide relatively under the action of thread meshing transmission, and each guide piece is hinged with a top support plate (201);
side supporting pieces I (204) are symmetrically hinged to two side positions of the inner wall of the experimental simulation box piece (2), side supporting pieces II are hinged to the positions, corresponding to the side supporting pieces I (204), of the top supporting plate (201), and one end of each side supporting piece I (204) is hinged to the corresponding side supporting piece II;
the inner wall of the experimental simulation box (2) is positioned below the first side support piece (204) and is rotatably connected with an adjustable telescopic rod (205), and the output end of the adjustable telescopic rod (205) is connected with hinge shafts of the first side support piece (204) and the second side support piece; when the guide piece slides and is adjusted along the bidirectional screw piece (202), the adjustable telescopic rod (205) correspondingly stretches and regulates, so that the top support plate (201) can present various inclined plane support frame postures in the experimental simulation box piece;
the stamping and smoothing assembly (6) comprises an outer guide ring piece (601), a rotating disc body (602), a mounting bracket, a sliding lead screw (603) and a lower smoothing device (8), wherein the outer guide ring piece (601) is coaxially fixed inside the connecting end cover (4), the rotating disc body (602) is arranged in the outer guide ring piece (601) and can relatively rotate through a built-in rotor, and the rotating disc body (602) is rotationally driven by an external motor arranged on the connecting end cover (4);
a mounting bracket is transversely fixed on the rotary disc body (602), a sliding lead screw (603) is arranged in the mounting bracket, and a lower smoothing device (8) is connected on the sliding lead screw (603) in a sliding manner;
the lower smoothing device (8) performs circular rotation motion around the axis of the connecting end cover (4) under the rotation action of the rotating disc body (602), and can perform transverse sliding along the sliding screw rod (603) to adjust the outer diameter of the smoothing working surface;
the lower smoothing device (8) further comprises a main rotating wheel (802), a sliding guide (803), a fixing kit (801), a driving guide seat (804) and an inner rolling shaft (806); the upper side of the inside of the fixed sleeve (801) is provided with a main rotating wheel (802) in a limiting manner, the main rotating wheel (802) is hinged with a transmission shaft, the fixed sleeve is provided with a sliding guide member (803) in a sliding and penetrating manner, one end of the sliding guide member (803) is hinged with the transmission shaft, and the sliding guide member (803) is driven to slide vertically under the rotating action of the main rotating wheel (802);
the lower extreme of slip guide (803) is even to be equipped with drive guide (804), drive guide (804) go up through outer support (805) symmetry rotation be provided with interior roller bearing (806), interior roller bearing (806) with drive guide (804) between cup joint the area of taking.
2. The physical simulation experiment device for combined mining of coal bed methane of multiple coal beds according to claim 1, which is characterized in that: the main bearing column (3) is of a column body structure with a two-section type contractible cross section, a hydraulic telescopic cylinder (301) is coaxially arranged in the main bearing column (3), and vertical lifting adjustment is carried out by the telescopic action of the hydraulic telescopic cylinder (301);
and the connecting end cover (4) is far away from one side of the main bearing column (3) and is obliquely provided with an exhaust pipe (401), one end of the exhaust pipe (401) penetrates through the connecting end cover (4) in a sealing mode, and the other end of the exhaust pipe (401) is communicated with an external pump piece and used for absorbing and discharging coal bed gas overflowing from the coal rock sample in the experiment simulation box piece (2).
3. The physical simulation experiment device for combined mining of coal bed gas in multiple coal beds according to claim 1, which is characterized in that: the cross section of the top support plate (201) is of a multi-section type telescopic structure.
4. The physical simulation experiment device for combined mining of coal bed gas in multiple coal beds according to claim 1, which is characterized in that: a plurality of groups of connecting springs (807) are further connected between the sliding guide member (803) and the driving guide seat (804).
5. The physical simulation experiment device for combined mining of coal bed methane of multiple coal beds according to claim 1, which is characterized in that: the gas supply device (7) comprises an installation main pipe (701), a flow dividing guide piece (702), an outer casing piece (703), an inner flow dividing disc (704) and an injection nozzle (705); the installation main pipe (701) vertically penetrates through the lower side of the middle part of the experiment simulation box part (2), one end of the installation main pipe (701) is communicated with an external air supply pump part, and the other end of the installation main pipe (701) is communicated with a flow distribution guide part (702) in a bilateral symmetry mode;
an outer casing body piece (703) is sleeved at the port outlet of each flow dividing guide piece (702), an inner flow dividing disc (704) is coaxially fixed in the outer casing body piece (703), a plurality of exhaust concave positions are arranged on the upper circumference of the inner flow dividing disc (704), and an injection spray head (705) is arranged in each exhaust concave position;
a plurality of ventilation hole sites are arranged on the outer wrapping body member (703) in a circumferential array.
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| CN118091027A (en) * | 2024-01-09 | 2024-05-28 | 重庆大学 | High-temperature high-humidity tunnel air bag gas exudation and concentration distribution test device and method |
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| CN105974084A (en) * | 2016-07-11 | 2016-09-28 | 中国矿业大学(北京) | In-coal-seam gas extraction experiment simulation device |
| CN107725006A (en) * | 2017-11-02 | 2018-02-23 | 西安科技大学 | A kind of coal bed drilling gas pumping simulation test device and method |
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| CN111579378A (en) * | 2020-07-07 | 2020-08-25 | 河南理工大学 | Device for monitoring surface temperature change during loading and cracking of gas-containing coal rock |
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| CN108798630B (en) * | 2018-04-28 | 2021-09-28 | 中国矿业大学 | Cave pressure relief mining simulation test system for tectonic coal in-situ coal bed gas horizontal well |
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Effective date of registration: 20231220 Address after: 100083 No. 29, Haidian District, Beijing, Xueyuan Road Patentee after: China University of Geosciences (Beijing) Patentee after: CHINA UNITED COALBED METHANE NATIONAL ENGINEERING RESEARCH CENTER Co.,Ltd. Address before: 100083 No. 29, Haidian District, Beijing, Xueyuan Road Patentee before: China University of Geosciences (Beijing) |
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