CN112832767B - Coal seam roof reinforcing apparatus based on high-pressure gas-solid mixture fills - Google Patents
Coal seam roof reinforcing apparatus based on high-pressure gas-solid mixture fills Download PDFInfo
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- CN112832767B CN112832767B CN202110008219.6A CN202110008219A CN112832767B CN 112832767 B CN112832767 B CN 112832767B CN 202110008219 A CN202110008219 A CN 202110008219A CN 112832767 B CN112832767 B CN 112832767B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms
- B01F27/906—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms with fixed axis
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/138—Plastering the borehole wall; Injecting into the formation
Abstract
The utility model provides a coal seam roof reinforcing apparatus based on high pressure gas-solid mixture fills, including all setting up subaerial gas supply jar, the booster, gas-solid mixer and storage tank, the coal seam top is bored and is equipped with vertical well, vertical well top-down bores stratum and pressure-bearing water layer in proper order and bores to the coal seam roof layer, the gas outlet of gas supply jar passes through first gas piping connection with the air inlet of booster, the gas outlet of booster passes through second gas piping connection with the air inlet of gas-solid mixer, the discharge gate of storage tank passes through feed tube connection with the feed inlet of gas-solid mixer, the discharge gate of gas-solid mixer is connected with the well head of vertical well, the inflation granule has been packed in the storage tank. According to the invention, the high-pressure gas and the expansion particles are mixed to form the high-pressure gas-solid mixture, and the high-pressure gas-solid mixture is poured into the seam roof layer through the vertical well, so that the expansion particles are filled into the cracks of the seam roof layer to expand and block the cracks, the reinforcement of the seam roof is realized, and the problem of roof leakage of the seam is effectively prevented and treated.
Description
Technical Field
The invention relates to the technical field of coal mining, in particular to a coal seam roof reinforcement device based on high-pressure gas-solid mixture injection.
Background
Coal is the most widely distributed conventional energy source with the greatest reserves in the world, is the cheapest energy source, is also an important strategic resource, is widely applied to the industrial production of steel, electric power, chemical industry and the like and the living field of residents, and accounts for 25% of the world primary energy consumption. In recent years, the national economy of China continuously and rapidly develops, and the high-speed development of industries such as electric power, metallurgy, building materials, chemical industry and the like causes the great increase of the demand for coal, and the consumption is gradually increased year by year. And the coal in China can be proved to have the recoverable reserve of more than 2000 hundred million tons, and the resource amount can reach 3 trillion tons. Of these, 5094.91 hundred million tons of anthracite and bituminous coal, and 4747.20 hundred million tons of subbituminous and lignite. Coal is one of the indispensable energy sources in our production and life in the present and future for a long time, and the supply of coal is also related to the stability of the development of the industrial and even the whole social aspects of our country, so that the deep research on the exploitation technology and equipment of coal resources is necessary.
The coal resource exploitation process is a complex process comprising roadway arrangement modes in sections or coal mining strips and extraction processes matched with each other. In the mining process, factors such as geological structure, coal seam burial depth, coal seam occurrence condition, coal seam thickness and hardness, coal seam structure, top and bottom plate conditions, coal quality conditions, mine production capacity and the like have influence on the mining efficiency. The upper layer of the working surface of the coal bed is provided with a pressure-bearing water layer, and the pressure-bearing water is easy to cause serious roof leakage of the working surface through a fault fracture surface due to geological change and the existence of cracks, so that coal exploitation cannot be carried out, and therefore, the development of the work for reinforcing the fracture area and the gap of the top plate of the coal bed is an important means for guaranteeing the coal exploitation.
Disclosure of Invention
The invention aims to provide a coal seam roof reinforcing device based on high-pressure gas-solid mixture injection.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the utility model provides a coal seam roof reinforcing apparatus based on high pressure gas-solid mixture fills, including all setting up subaerial gas supply jar, the booster, gas-solid mixer and storage tank, the coal seam top is bored and is equipped with vertical well, vertical well top-down bores stratum and pressure-bearing water layer in proper order and bores to the coal seam roof layer, the gas outlet of gas supply jar passes through first gas piping connection with the air inlet of booster, the gas outlet of booster passes through second gas piping connection with the air inlet of gas-solid mixer, the discharge gate of storage tank passes through feed tube connection with the feed inlet of gas-solid mixer, the discharge gate of gas-solid mixer is connected with the well head of vertical well, the inflation granule has been packed in the storage tank.
The gas-solid mixer comprises a mixing cylinder body, the mixing cylinder body is vertically arranged, the top center of the mixing cylinder body is provided with a high-pressure gas inlet, the gas outlet of a second gas pipeline is connected with the high-pressure gas inlet, the bottom of the mixing cylinder body is open, a mixing hopper is concentrically arranged in the mixing cylinder body, the mixing hopper is of a conical cylinder structure with a thin upper part, a thick lower part and an open bottom, an annular plate is integrally formed at the outer circle of the bottom of the mixing hopper, the lower end face of the mixing cylinder body is fixedly connected with the upper surface of the annular plate, the outer circle bottom of the annular plate is integrally formed with a connecting cylinder, the lower end of the connecting cylinder is fixedly connected with a discharging cylinder, the discharging cylinder is of a conical cylinder structure with a thin upper part and a thin lower part, the bottom of the discharging cylinder is provided with a gas-solid mixture outlet, the gas-solid mixture outlet is connected with a wellhead of a vertical well, the middle part of the right side wall of the mixing cylinder is provided with a solid particle inlet, the middle part of the right side of the inner circle of the mixing cylinder is fixedly connected with a feeding pipe between the middle part of the right side of the outer circle of the mixing hopper, the feeding pipe is horizontally arranged along the left-right direction, the right end of the feeding pipe is connected with a solid particle inlet, the left end of the feeding pipe is fixedly arranged on the mixing hopper and is communicated with the inside of the mixing hopper, a feeding device is arranged in the feeding pipe, a plurality of air inlet through holes are uniformly formed in the mixing hopper, the center line of each air inlet through hole is arranged in a high inclination mode along the outer side of the radial inner bottom of the mixing hopper, a first rotating shaft is concentrically arranged in the mixing hopper, a hollow motor is fixedly arranged in a connecting cylinder, the hollow motor comprises a stator and a rotor, the stator and the rotor are of a cylindrical structure, the outer circle of the stator is tightly contacted with the inner circle of the connecting cylinder, a pressing ring is fixedly clamped between the lower surface of the stator and the upper end face of the discharging cylinder, the upper surface of the stator is tightly pressed and contacted with the lower surface of an annular plate, the outer circle of the rotor is rotatably arranged in the inner circle of the stator, a lining is fixedly arranged in the inner circle of the rotor, the center department of bush is provided with the axle sleeve, fixedly connected with a plurality of circumference array setting's dead lever between the excircle of axle sleeve and the interior circle of bush, and the top at mixing bucket is installed in the upper end rotation of first pivot, and the axle sleeve is passed to the lower extreme of first pivot, first pivot and axle sleeve fixed connection, and there are a plurality of rotary vane that set up side by side from top to bottom along axial fixed mounting in the first pivot, and the size of each rotary vane increases in proper order from top to bottom.
The feeding device comprises a material roller and a feeding speed reducing motor, wherein power shafts of the material roller and the feeding speed reducing motor are horizontally arranged along the front and rear directions, front and rear ends of a central shaft of the material roller are respectively rotatably arranged on a front side wall and a rear side wall of a feeding pipe, the feeding pipe is plugged by the material roller, two radially symmetrical material accommodating grooves are formed in the outer circumference of the material roller, the feeding speed reducing motor is fixedly arranged on the front side of the middle part of the right side of the mixing cylinder, and the rear end of the power shaft of the feeding speed reducing motor extends into the mixing cylinder and is in transmission connection with the front end of the central shaft of the material roller.
The storage tank includes the jar body, stirring gear motor and second pivot, the lateral wall downside of the jar body is equipped with the material export, the top fixed mounting of the jar body has the motor support, stirring gear motor fixed mounting is on the motor support, stirring gear motor's power shaft and the equal vertical setting of second pivot, stirring gear motor's power shaft passes jar body's roof center downwards and stretches into the jar internally, stirring gear motor's power shaft lower extreme coaxial transmission connects the upper end of second pivot, the lower extreme of second pivot is rotated and is installed at jar body's bottom plate center, there are a plurality of stirring vane that set up side by side from top to bottom along axial fixed mounting in the second pivot, the eccentric department is provided with the charge door on jar body's the roof, sealed lid is installed to the charge door.
The expansion particle comprises a rubber spherical shell and an expansion core, the expansion core is arranged in the rubber spherical shell, a plurality of water inlet holes are uniformly formed in the rubber spherical shell, a layer of slow-melting layer is wrapped outside the rubber spherical shell, the expansion core is made of a high-water-absorption resin material, and the slow-melting layer is made of a water-soluble cellulose material.
Compared with the prior art, the invention has outstanding substantive characteristics and remarkable progress, and specifically, the working principle of the invention is as follows: the air supply tank is used as an air source to supply air (nitrogen), the air enters the booster through a first air pipeline, the booster works to compress and boost the air into high-pressure air, then the high-pressure air enters the mixing cylinder of the air-solid mixer through a second air pipeline and a high-pressure air inlet, meanwhile, the hollow motor, the stirring speed-reducing motor and the feeding speed-reducing motor all work, the rotor of the hollow motor drives the bushing to rotate at a high speed, the bushing drives the first rotating shaft to rotate at a high speed, the first rotating shaft drives each rotating blade to rotate at a high speed, the high-pressure air enters the mixing hopper through each air inlet through hole, the center line of the air inlet through hole is arranged in a high-inclination mode along the outer side of the radial inner bottom of the mixing hopper, so that swirling flow is formed after the high-pressure air enters the mixing hopper, the power shaft of the stirring speed-reducing motor drives the second rotating shaft to rotate, and the second rotating shaft drives each stirring blade to rotate, each stirring blade scrapes each expansion particle, drives each expansion particle to move in the tank body and continuously discharge the expansion particles through the material outlet under the action of dead weight, each expansion particle enters the feeding pipe through the feeding pipe and the solid particle inlet, the power shaft of the feeding speed reducing motor drives the material roller to rotate, each expansion particle contacts with the material roller after entering the feeding pipe, two material accommodating grooves on the material roller intermittently and batchwise drive each expansion particle to the left end part of the feeding pipe, each expansion particle is gradually pushed into the mixing hopper, each expansion particle is subjected to high-pressure gas swirling flow in the mixing hopper and stirring by each rotating blade to form a high-pressure gas-solid mixture with the high-pressure gas, the high-pressure gas-solid mixture flows downwards and enters the vertical well through the gas-solid mixture outlet at the bottom of the discharging cylinder, the high-pressure gas-solid mixture flows downwards along the vertical well to reach the seam roof layer, the crack space of the seam roof layer is large, the high-pressure gas-solid mixture enters into the crack of the seam roof layer, each expansion particle in the high-pressure gas-solid mixture is filled into the crack of the seam roof layer to be contacted with water in the crack of the seam roof layer, the slow-melting layer of the expansion particle is made of water-soluble cellulose materials, the slow-melting layer is slowly dissolved after contacting water, so that the rubber spherical shell is contacted with water, water enters into the rubber spherical shell through each water inlet hole to be contacted with the expansion core, the expansion core is made of super absorbent resin materials, the expansion core absorbs a large amount of water, the volume is increased, and the expansion core rapidly expands to force the rubber spherical shell to expand outwards, so that the crack is blocked, and the effect of reinforcing the seam roof is realized.
In summary, the high-pressure gas and the expansion particles are mixed to form the high-pressure gas-solid mixture, and the high-pressure gas-solid mixture is poured into the seam roof layer through the vertical well, so that the expansion particles are filled into the cracks of the seam roof layer to expand and block the cracks, the reinforcement of the seam roof is realized, and the problem of roof leakage of the seam is effectively prevented and treated.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a top view of the gas-solid mixer of the present invention.
Fig. 3 is a cross-sectional view taken along A-A in fig. 2.
Fig. 4 is a sectional view taken along the direction B-B in fig. 2.
Fig. 5 is a cross-sectional view of a storage tank of the present invention.
Fig. 6 is a schematic structural view of the expanded particles of the present invention.
Detailed Description
Embodiments of the present invention are further described below with reference to the accompanying drawings.
As shown in fig. 1-6, a coal seam roof reinforcing device based on high-pressure gas-solid mixture pouring comprises a gas supply tank 1, a supercharger 2, a gas-solid mixer 3 and a storage tank 4 which are all arranged on the ground, wherein a vertical well 6 is drilled above a coal seam 5, the vertical well 6 sequentially penetrates through a stratum 7 and a bearing water layer 8 from top to bottom and is drilled to a coal seam roof layer 9, a gas outlet of the gas supply tank 1 is connected with a gas inlet of the supercharger 2 through a first gas pipeline 10, a gas outlet of the supercharger 2 is connected with a gas inlet of the gas-solid mixer 3 through a second gas pipeline 11, a discharge port of the storage tank 4 is connected with a feed port of the gas-solid mixer 3 through a feed pipe 12, a discharge port of the gas-solid mixer 3 is connected with a wellhead of the vertical well 6, and expansion particles are filled in the storage tank 4.
The gas-solid mixer 3 comprises a mixing cylinder 13, the mixing cylinder 13 is vertically arranged, a high-pressure gas inlet 14 is arranged at the center of the top of the mixing cylinder 13, a gas outlet of a second gas pipeline 11 is connected with the high-pressure gas inlet 14, the bottom of the mixing cylinder 13 is open, a mixing hopper 15 is concentrically arranged in the mixing cylinder 13, the mixing hopper 15 is of a conical cylinder structure with a thin upper part and a thick lower part and an open bottom, an annular plate 16 is integrally formed at the outer circle of the bottom of the mixing hopper 15, the lower end surface of the mixing cylinder 13 is fixedly connected to the upper surface of the annular plate 16, a connecting cylinder 17 is integrally formed at the outer circle bottom of the annular plate 16, the lower end of the connecting cylinder 17 is fixedly connected with a discharging cylinder 18, the discharging cylinder 18 is of a conical cylinder structure with a thick upper part and a thin lower part, a gas-solid mixture outlet 19 is arranged at the bottom of the discharging cylinder 18, the gas-solid mixture outlet 19 is connected with the wellhead of the vertical well 6, a solid particle inlet 20 is arranged at the middle part of the right side wall of the mixing cylinder 13, a feeding pipe 21 is fixedly connected between the middle part of the right side of the inner circle of the mixing cylinder 13 and the middle upper part of the right side of the outer circle of the mixing hopper 15, the feeding pipe 21 is horizontally arranged along the left-right direction, the right end of the feeding pipe 21 is connected with a solid particle inlet 20, the left end of the feeding pipe 21 is fixedly arranged on the mixing hopper 15 and is communicated with the inside of the mixing hopper 15, a feeding device is arranged in the feeding pipe 21, a plurality of air inlet through holes 22 are uniformly formed in the mixing hopper 15, the center line of the air inlet through holes 22 is obliquely arranged along the outer height of the radial inner bottom of the mixing hopper 15, a first rotating shaft 23 is concentrically arranged in the mixing hopper 15, a hollow motor is fixedly arranged in the connecting cylinder 17, the hollow motor comprises a stator 24 and a rotor 25, the stator 24 and the rotor 25 are of a cylindrical structure, the outer circle of the stator 24 is tightly contacted with the inner circle of the connecting cylinder 17, a pressing ring 26 is fixedly clamped between the lower surface of the stator 24 and the upper end surface of the discharging cylinder 18, the upper surface of stator 24 and the lower surface sticiss contact of annular slab 16, the excircle rotation of rotor 25 is installed in the interior circle of stator 24, the interior circle fixed mounting of rotor 25 has bush 27, the center department of bush 27 is provided with axle sleeve 28, fixedly connected with a plurality of circumference between the excircle of axle sleeve 28 and the interior circle of bush 27 is arrayed the dead lever 29 that sets up, the top at mixing bucket 15 is installed in the rotation of first pivot 23, the lower extreme of first pivot 23 passes axle sleeve 28, first pivot 23 and axle sleeve 28 fixed connection, a plurality of rotary vane 30 that set up side by side about the axial fixed mounting is gone up in first pivot 23, the size of each rotary vane 30 increases in proper order from top to bottom.
The feeding device comprises a material roller 31 and a feeding speed reducing motor 32, wherein power shafts of the material roller 31 and the feeding speed reducing motor 32 are horizontally arranged along the front and rear directions, front and rear ends of a central shaft of the material roller 31 are respectively rotatably arranged on the front side wall and the rear side wall of the feeding pipe 21, the material roller 31 is used for blocking the feeding pipe 21, two radially symmetrical material accommodating grooves 33 are formed in the outer circumference of the material roller 31, the feeding speed reducing motor 32 is fixedly arranged on the front side of the middle part of the right side of the mixing cylinder 13, and the rear end of the power shaft of the feeding speed reducing motor 32 extends into the mixing cylinder 13 and is in transmission connection with the front end of the central shaft of the material roller 31.
The storage tank 4 comprises a tank body 34, a stirring gear motor 35 and a second rotating shaft 36, a material outlet 37 is formed in the lower side portion of the side wall of the tank body 34, a motor support 38 is fixedly arranged at the top of the tank body 34, the stirring gear motor 35 is fixedly arranged on the motor support 38, a power shaft of the stirring gear motor 35 and the second rotating shaft 36 are vertically arranged, the power shaft of the stirring gear motor 35 downwards penetrates through the center of a top plate of the tank body 34 to extend into the tank body 34, the lower end of the power shaft of the stirring gear motor 35 is coaxially connected with the upper end of the second rotating shaft 36 in a transmission manner, the lower end of the second rotating shaft 36 is rotatably arranged at the center of a bottom plate of the tank body 34, a plurality of stirring blades 39 which are arranged side by side up and down are fixedly arranged on the second rotating shaft 36, a charging port 40 is arranged at the eccentric position of the top plate of the tank body 34, and a sealing cover 41 is arranged at the charging port.
The expansion particles comprise a rubber spherical shell 42 and an expansion core 43, the expansion core 43 is arranged in the rubber spherical shell 42, a plurality of water inlet through holes 44 are uniformly formed in the rubber spherical shell 42, a slow-melting layer 45 is wrapped outside the rubber spherical shell 42, the expansion core 43 is made of a super-absorbent resin material, and the slow-melting layer 45 is made of a water-soluble cellulose material.
The working principle of the invention is as follows: the gas supply tank 1 is used as a gas source to supply gas (nitrogen), the gas enters the booster 2 through the first gas pipeline 10, the booster 2 works to compress and boost the gas into high-pressure gas, then the high-pressure gas enters the mixing cylinder 13 of the gas-solid mixer 3 through the second gas pipeline 11 and the high-pressure gas inlet 14, meanwhile, the hollow motor, the stirring and decelerating motor 35 and the feeding and decelerating motor 32 work, the rotor 25 of the hollow motor drives the bushing 27 to rotate at a high speed, the bushing 27 drives the shaft sleeve 28 to rotate at a high speed, the shaft sleeve 28 drives the first rotating shaft 23 to rotate at a high speed, the first rotating shaft 23 drives each rotating blade 30 to rotate at a high speed, the high-pressure gas enters the mixing hopper 15 through each air inlet through hole 22, and the center line of the air inlet through holes 22 is arranged in a high inclination along the radial inner bottom outside of the mixing hopper 15, so that the swirling flow is formed after the high-pressure gas enters the mixing hopper 15, the power shaft of the stirring speed reducing motor 35 drives the second rotating shaft 36 to rotate, the second rotating shaft 36 drives each stirring blade 39 to rotate, each stirring blade 39 scrapes each expansion particle, drives each expansion particle to move in the tank 34 and continuously discharge under the action of self weight through the material outlet 37, each expansion particle enters the feeding pipe 21 through the feeding pipe 12 and the solid particle inlet 20, the power shaft of the feeding speed reducing motor 32 drives the material drum 31 to rotate, each expansion particle enters the feeding pipe 21 and then contacts with the material drum 31, the two material accommodating grooves 33 on the material drum 31 intermittently drive each expansion particle to the left end part of the feeding pipe 21 in batches, each expansion particle is gradually pushed into the mixing hopper 15 in batches, each expansion particle is subjected to high-pressure gas rotational flow in the mixing hopper 15 and is mixed with high-pressure gas under the stirring action of each rotating blade 30, the high-pressure gas-solid mixture flows downwards and enters the vertical well 6 through the gas-solid mixture outlet 19 at the bottom of the discharging barrel 18, the high-pressure gas-solid mixture flows downwards along the vertical well 6 to reach the coal seam roof layer 9, the crack space of the coal seam roof layer 9 is large, the high-pressure gas-solid mixture enters the cracks of the coal seam roof layer 9, each expansion particle in the high-pressure gas-solid mixture is filled into the cracks of the coal seam roof layer 9 to be contacted with water in the cracks of the coal seam roof layer 9, the slow-melting layer 45 of the expansion particles is made of water-soluble cellulose materials, the slow-melting layer 45 is slowly dissolved after contacting water, so that the rubber spherical shell 42 is contacted with water, the water enters the rubber spherical shell 42 through each water inlet through hole 44 to be contacted with the expansion core 43, the expansion core 43 is made of a high water-absorbing resin material, the volume is increased, the expansion core 43 is rapidly expanded to force the whole rubber spherical shell 42 to expand outwards, and thus the cracks are blocked, and the effect of reinforcing the coal seam roof is realized.
The above embodiments are merely for illustrating the technical aspects of the present invention, and it should be understood by those skilled in the art that the present invention is described in detail with reference to the above embodiments; modifications and equivalents may be made thereto without departing from the spirit and scope of the invention, which is intended to be encompassed by the claims.
Claims (4)
1. The utility model provides a coal seam roof reinforcing apparatus based on high pressure gas-solid mixture fills which characterized in that: the device comprises a gas supply tank, a supercharger, a gas-solid mixer and a storage tank which are all arranged on the ground, wherein a vertical well is drilled above a coal seam, the vertical well penetrates through a stratum and a pressure-bearing water layer from top to bottom and is drilled to a coal seam roof layer, a gas outlet of the gas supply tank is connected with a gas inlet of the supercharger through a first gas pipeline, a gas outlet of the supercharger is connected with a gas inlet of the gas-solid mixer through a second gas pipeline, a discharge port of the storage tank is connected with a feed inlet of the gas-solid mixer through a feed pipe, a discharge port of the gas-solid mixer is connected with a wellhead of the vertical well, and expansion particles are filled in the storage tank;
the gas-solid mixer comprises a mixing cylinder body, the mixing cylinder body is vertically arranged, the top center of the mixing cylinder body is provided with a high-pressure gas inlet, the gas outlet of a second gas pipeline is connected with the high-pressure gas inlet, the bottom of the mixing cylinder body is open, a mixing hopper is concentrically arranged in the mixing cylinder body, the mixing hopper is of a conical cylinder structure with a thin upper part, a thick lower part and an open bottom, an annular plate is integrally formed at the outer circle of the bottom of the mixing hopper, the lower end face of the mixing cylinder body is fixedly connected with the upper surface of the annular plate, the outer circle bottom of the annular plate is integrally formed with a connecting cylinder, the lower end of the connecting cylinder is fixedly connected with a discharging cylinder, the discharging cylinder is of a conical cylinder structure with a thin upper part and a thin lower part, the bottom of the discharging cylinder is provided with a gas-solid mixture outlet, the gas-solid mixture outlet is connected with a wellhead of a vertical well, the middle part of the right side wall of the mixing cylinder is provided with a solid particle inlet, the middle part of the right side of the inner circle of the mixing cylinder is fixedly connected with a feeding pipe between the middle part of the right side of the outer circle of the mixing hopper, the feeding pipe is horizontally arranged along the left-right direction, the right end of the feeding pipe is connected with a solid particle inlet, the left end of the feeding pipe is fixedly arranged on the mixing hopper and is communicated with the inside of the mixing hopper, a feeding device is arranged in the feeding pipe, a plurality of air inlet through holes are uniformly formed in the mixing hopper, the center line of each air inlet through hole is arranged in a high inclination mode along the outer side of the radial inner bottom of the mixing hopper, a first rotating shaft is concentrically arranged in the mixing hopper, a hollow motor is fixedly arranged in a connecting cylinder, the hollow motor comprises a stator and a rotor, the stator and the rotor are of a cylindrical structure, the outer circle of the stator is tightly contacted with the inner circle of the connecting cylinder, a pressing ring is fixedly clamped between the lower surface of the stator and the upper end face of the discharging cylinder, the upper surface of the stator is tightly pressed and contacted with the lower surface of an annular plate, the outer circle of the rotor is rotatably arranged in the inner circle of the stator, a lining is fixedly arranged in the inner circle of the rotor, the center department of bush is provided with the axle sleeve, fixedly connected with a plurality of circumference array setting's dead lever between the excircle of axle sleeve and the interior circle of bush, and the top at mixing bucket is installed in the upper end rotation of first pivot, and the axle sleeve is passed to the lower extreme of first pivot, first pivot and axle sleeve fixed connection, and there are a plurality of rotary vane that set up side by side from top to bottom along axial fixed mounting in the first pivot, and the size of each rotary vane increases in proper order from top to bottom.
2. The high-pressure gas-solid mixture injection-based coal seam roof reinforcement device according to claim 1, wherein: the feeding device comprises a material roller and a feeding speed reducing motor, wherein power shafts of the material roller and the feeding speed reducing motor are horizontally arranged along the front and rear directions, front and rear ends of a central shaft of the material roller are respectively rotatably arranged on a front side wall and a rear side wall of a feeding pipe, the feeding pipe is plugged by the material roller, two radially symmetrical material accommodating grooves are formed in the outer circumference of the material roller, the feeding speed reducing motor is fixedly arranged on the front side of the middle part of the right side of the mixing cylinder, and the rear end of the power shaft of the feeding speed reducing motor extends into the mixing cylinder and is in transmission connection with the front end of the central shaft of the material roller.
3. The high-pressure gas-solid mixture injection-based coal seam roof reinforcement device according to claim 2, wherein: the storage tank includes the jar body, stirring gear motor and second pivot, the lateral wall downside of the jar body is equipped with the material export, the top fixed mounting of the jar body has the motor support, stirring gear motor fixed mounting is on the motor support, stirring gear motor's power shaft and the equal vertical setting of second pivot, stirring gear motor's power shaft passes jar body's roof center downwards and stretches into the jar internally, stirring gear motor's power shaft lower extreme coaxial transmission connects the upper end of second pivot, the lower extreme of second pivot is rotated and is installed at jar body's bottom plate center, there are a plurality of stirring vane that set up side by side from top to bottom along axial fixed mounting in the second pivot, the eccentric department is provided with the charge door on jar body's the roof, sealed lid is installed to the charge door.
4. The high-pressure gas-solid mixture injection-based coal seam roof reinforcement device according to claim 2, wherein: the expansion particle comprises a rubber spherical shell and an expansion core, the expansion core is arranged in the rubber spherical shell, a plurality of water inlet holes are uniformly formed in the rubber spherical shell, a layer of slow-melting layer is wrapped outside the rubber spherical shell, the expansion core is made of a high-water-absorption resin material, and the slow-melting layer is made of a water-soluble cellulose material.
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| CN202110008219.6A CN112832767B (en) | 2021-01-05 | 2021-01-05 | Coal seam roof reinforcing apparatus based on high-pressure gas-solid mixture fills |
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| CN106593489A (en) * | 2016-12-02 | 2017-04-26 | 淮北矿业股份有限公司 | Difficult mining coal seam bottom plate thin layer limestone high-pressure strong aquifer karst fissure aggregate perfusion method |
| CN110630211B (en) * | 2018-08-31 | 2021-08-17 | 中国矿业大学 | Method for blocking overburden mining-induced fracture by ultrasonic in-situ slurry making |
| CN208918508U (en) * | 2018-09-01 | 2019-05-31 | 安徽理工大学 | A kind of surface drilling to coal seam breaking roof grouting and reinforcing grouting device |
| CN111271117A (en) * | 2019-05-03 | 2020-06-12 | 石家庄国盛矿业科技有限公司 | Polymer foaming material for coal mine airtight filling |
| CN111236916A (en) * | 2020-03-25 | 2020-06-05 | 平安煤炭开采工程技术研究院有限责任公司 | Coal seam fracturing fluid mixing device and coal seam fracturing system |
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| CN112832767A (en) | 2021-05-25 |
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