CN112412454B - Water-sand-gunpowder coupling blasting anti-reflection device for coal mine and use method - Google Patents
Water-sand-gunpowder coupling blasting anti-reflection device for coal mine and use method Download PDFInfo
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- CN112412454B CN112412454B CN202011391370.4A CN202011391370A CN112412454B CN 112412454 B CN112412454 B CN 112412454B CN 202011391370 A CN202011391370 A CN 202011391370A CN 112412454 B CN112412454 B CN 112412454B
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- 238000005422 blasting Methods 0.000 title claims abstract description 77
- 239000003245 coal Substances 0.000 title claims abstract description 59
- 239000003721 gunpowder Substances 0.000 title claims abstract description 37
- 238000010168 coupling process Methods 0.000 title claims abstract description 29
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 29
- 230000008878 coupling Effects 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 159
- 239000004576 sand Substances 0.000 claims abstract description 78
- 238000002347 injection Methods 0.000 claims abstract description 26
- 239000007924 injection Substances 0.000 claims abstract description 26
- 239000007787 solid Substances 0.000 claims abstract description 22
- 239000013013 elastic material Substances 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 74
- 230000001105 regulatory effect Effects 0.000 claims description 22
- 238000005474 detonation Methods 0.000 claims description 9
- 238000005553 drilling Methods 0.000 claims description 8
- 239000006004 Quartz sand Substances 0.000 claims description 6
- 238000009933 burial Methods 0.000 claims description 6
- 230000033228 biological regulation Effects 0.000 claims description 5
- 239000004575 stone Substances 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 abstract 1
- 238000005065 mining Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 10
- 230000035699 permeability Effects 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000004880 explosion Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C37/00—Other methods or devices for dislodging with or without loading
- E21C37/06—Other methods or devices for dislodging with or without loading by making use of hydraulic or pneumatic pressure in a borehole
- E21C37/12—Other methods or devices for dislodging with or without loading by making use of hydraulic or pneumatic pressure in a borehole by injecting into the borehole a liquid, either initially at high pressure or subsequently subjected to high pressure, e.g. by pulses, by explosive cartridges acting on the liquid
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C37/00—Other methods or devices for dislodging with or without loading
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention belongs to the technical field of blasting, permeability-increasing and pressure-relieving, and comprises a coupling blasting permeability-increasing assembly, a leg wire and an exploder, wherein the coupling blasting permeability-increasing assembly comprises a water sand bag, detonators, wires and gunpowder rolls, a bag body of the water sand bag is made of elastic materials, the water sand bag is in a strip shape, the water sand bag is positioned on the inner end face of a drill hole to be closed, the water sand bag is positioned on the outer side of the drill hole to be opened, an inner ring space of the water sand bag extending along a length square is formed at the center of the water sand bag, the detonators and the gunpowder rolls form a blasting tube, the blasting tube is inserted in the inner ring space of the water sand bag, a plurality of detonators are connected with one another through the wires, and the detonators positioned on the outermost side of the blasting tube are electrically connected with the exploder through the leg wire; the water sand bag is filled with a mixture of solid gravel and water, a water injection pipe is arranged in the outer end face of the water sand bag, and a water injection valve is arranged at the outer end of the water injection pipe. The device solves the problems of high stress, poor ventilation and the like of the low-permeability high-stress coal seam. The invention also provides a using method of the water-sand-gunpowder coupling blasting anti-reflection device for the coal mine.
Description
Technical Field
The invention belongs to the technical field of blasting, permeability-increasing and pressure-releasing, and particularly relates to a water-sand-gunpowder coupling blasting permeability-increasing device for a coal mine and a using method thereof.
Background
Along with the deepening of mining depth of mines in China year by year, occurrence distribution of low-permeability high-stress coal beds becomes normal, disaster effects induced by complex geological factors such as high stress, poor air permeability, soft coal quality and the like are more obvious, dynamic disaster potential and danger such as coal and gas outburst, abnormal gas emission and gas explosion are greatly enhanced, and the mining speed of the mines is severely restricted. The mining face is provided with a stress distribution pressure relief belt, a concentrated belt and an original belt for coal bodies in front of the mining face under the influence of mining. In the pressure relief zone, the ground stress and the gas pressure are lower than the original values, and the pressure relief zone belongs to a safety protection zone, so that the coal and the gas can be prevented from protruding; in the stress concentration zone, the stress of the coal bed is higher than the original stress, the coal body is severely crushed by extrusion, the overall air permeability is lower, when the coal bed is suddenly exposed in the mining process, the stored energy in the coal body can be rapidly released, and the dynamic disaster is extremely easy to induce. Therefore, the length of the pressure relief belt in front of the working face is prolonged, the air permeability of the coal body is improved, the gas emission is promoted, and the method becomes a fundamental strategy for preventing and controlling the gas dynamic disasters in the mining disturbance environment.
The permeability-increasing and pressure-releasing technology is to break through the constraints of the ground stress, the reservoir pressure and the coal rock strength of the coal body by means of external mechanical force, remove the stratum load stress, and realize effective permeability-increasing and pressure-releasing in a certain area in the coal body. At present, the common permeability-increasing and pressure-releasing technology used in coal mine underground comprises the technologies of gunpowder pre-splitting blasting, hydraulic fracturing, high-speed water jet, liquid CO2 phase-change fracturing and the like. The hydraulic measures have remarkable effects in aspects of permeability improvement, dust removal, gas desorption inhibition and the like, are widely applied to the field of implementing large-area pressure relief and gas extraction promotion of coal bodies, but have the advantages of relatively heavy use process, complex operation and relatively low application efficiency in a limited space in front of an underground mining working face due to relatively complex technology; the liquid CO2 phase change fracturing technology is introduced into the low permeability coal seam permeability-increasing field from China first, the safety coefficient is high, the operation process is simple, but compared with the hydraulic technology and the gunpowder blasting technology, a certain gap exists between permeability-increasing effects, in addition, the plain text of the public security department indicates that the explosion tube of the technology contains dangerous components and is not allowed to be applied in the well, and the technology gradually exits from the underground mine; the hydraulic gunpowder blasting technology has the earliest origin and the widest application, plays an important role in coal mining and tunneling all the time in the early stage, is applied to the deep hole presplitting blasting permeability-increasing field, has a certain improvement on the pressure relief and permeability-increasing effect of a coal bed, and has three technical defects in application: 1) When the energy wave is sprayed outwards, the energy wave is reflected and extruded by the hole wall, so that the energy is pushed against by the opposite movement, and the anti-reflection and pressure relief effects of the gunpowder are weakened; 2) After the instant explosion of gunpowder, the energy is unevenly distributed in the internal space of the drill hole, so that the crack distribution of the inner wall of the drill hole is uneven, and the anti-reflection and pressure relief range is affected; 3) The explosive explosion can generate detonation vibration to influence the coal body structure, if the hardness of the coal body is soft, the detonation vibration can cause new fracture damage, fracture blockage and secondary closure occur, and the pressure relief coal body loses the anti-reflection effect.
Disclosure of Invention
In order to solve the problems, the invention aims to provide the water-sand-gunpowder coupling blasting anti-reflection device for the coal mine, which is used for solving the production safety technical problems of serious coal seam gas disasters caused by complex geological factors such as large front coal body stress, high gas pressure, soft coal quality and the like in the mining process of a low-permeability high-stress coal seam, and can be used for improving the anti-reflection pressure relief capability, improving the crack expansion effect and preventing secondary blockage of cracks. The invention also provides a using method of the water-sand-gunpowder coupling blasting anti-reflection device for the coal mine.
In order to achieve the above purpose, the invention adopts the following technical scheme:
in a first technical scheme, the water-sand-gunpowder coupling blasting anti-reflection device for the coal mine is used for enabling coal seam to be subjected to anti-reflection and pressure relief, the coal seam is provided with a drill hole, and the water-sand-gunpowder coupling blasting anti-reflection device for the coal mine comprises a coupling blasting anti-reflection assembly, a foot line and an exploder, wherein
The coupling blasting anti-reflection assembly comprises a water sand bag, detonators, wires and gunpowder rolls, wherein the bag body of the water sand bag is made of elastic materials, the water sand bag is in a strip shape, the water sand bag is positioned on the inner side end face of a drill hole to be closed, the water sand bag is positioned on the outer side of the drill hole to be opened, an inner ring space of the water sand bag extending along a length square is formed at the center of the water sand bag, the detonators and the gunpowder rolls form a blasting tube, the blasting tube is inserted in the inner ring space of the water sand bag, a plurality of detonators are connected with one another through the wires, and the detonator positioned on the outermost side of the blasting tube is electrically connected with the blaster through a leg wire;
The water sand bag is filled with a mixture of solid gravel and water, a water injection pipe is arranged in the outer end face of the water sand bag, and a water injection valve is arranged at the outer end of the water injection pipe.
In the first technical scheme, preferably, the outer diameter of the blasting tube is smaller than the inner diameter of the inner ring space of the water sand bag by 1cm-3cm, and the outer diameter of the water sand bag is smaller than the diameter of the fracturing hole by 1cm-3cm.
In the first technical scheme, preferably, the overall length of the water sand bag is smaller than 4m-6m of the drilling length.
In the first technical scheme, preferably, the outer side and the inner side of the water sand bag can be expanded by 3 cm to 5cm, and the pressure resistance is 0.2 MPa to 0.5MPa.
In the first technical aspect, preferably, the length of the blasting tube is equal to the space length of the inner ring of the water sand bag.
In the first technical scheme, preferably, the volume ratio of the water filled in the water sand bag to the solid gravel is between 5:1 and 3:1.
In the first technical scheme, preferably, the solid gravel is quartz sand or haydite, and the diameter of the solid gravel is 0.4mm-0.9mm; when the ground stress is less than 15MPa or the burial depth is less than 600m, quartz sand is selected as the solid gravel; and when the ground stress is larger than 15MPa or the burial depth is larger than 600m, the solid gravel is selected from the stone ceramsite.
In the second technical scheme, the method for using the coal mine water-sand-gunpowder coupling blasting anti-reflection device is characterized in that any one of the first technical scheme is used:
step 1: feeding the coupling blasting anti-reflection component into a drill hole for filling, wherein a water injection valve is sequentially connected with a high-pressure rubber tube, a water pressure regulating pump, a pressure gauge, a high-pressure stop valve and a downhole water supply pipe, and the pressure resistance of the high-pressure rubber tube is 10-100 MPa;
Step 2: opening a water pressure regulating pump, regulating the water outlet pressure to be 0.2-0.3MPa according to the number of pressure gauges, then opening a high-pressure stop valve, communicating the water pressure regulating pump with a downhole water supply pipe, opening a water injection valve after the water pressure regulating pump shows that the water pressure is stable to be 0.2-0.3MPa, starting to inject water into a water sand bag, gradually expanding the volume of the water sand bag along with the increase of the water filling amount, tightly attaching the outer side of a drill hole and tightly holding a blasting pipe on the inner side of the water sand bag;
Step 3: when the water pressure regulating pump shows that the water pressure is close to 0.35MPa, the water injection valve is closed, water injection is stopped, then the high-pressure stop valve and the water pressure regulating pump are sequentially closed, and the blasting pipe is fully wrapped by the water sand bag;
Step 4: filling prepared stemming into a drill hole for plugging, wherein the plugging length is not less than 5m, guiding a foot line to a safe detonation zone according to the relevant regulations of underground gunpowder blasting of a coal mine in accordance with the safety regulations of the coal mine, connecting a detonator for detonation, and then removing a blasting device by a professional blasting technical engineer to finish all blasting anti-reflection procedures.
The beneficial effects of using the invention are as follows:
(1) The water-sand-gunpowder coupling blasting anti-reflection device adopts liquid water to replace air as an energy wave transmission medium, utilizes the incompressibility characteristic of the liquid water, avoids energy opposite impact caused by compression and contact reflection of energy waves in water, reduces impact strength, and simultaneously can further improve the impact strength by superposition of the energy waves in water, thereby comprehensively improving the energy utilization rate.
(2) The blasting tube in the fracturing hole is filled with liquid water, the liquid flow characteristic is exerted in the limited space, the omnibearing transmission of energy waves is realized, the inner wall of the drill hole is ensured to be impacted by energy in all directions at the same time, the uniform distribution of the new-born cracks around the hole wall is promoted, and the permeability and pressure relief effect of the coal body is improved.
(3) The solid gravel has high strength, forms a high-energy scattering effect when impacting along with energy waves to the inner wall of the drill hole, greatly improves the hammering force of the shock waves, and can greatly enhance the pressure relief and anti-reflection effects; meanwhile, when the solid gravel and the energy waves impact the hole wall together, part of the gravel also enters the newly-generated cracks, so that the support function is exerted, the detonation vibration damage is prevented, the newly-generated cracks are closed and blocked secondarily, and the stability and smoothness of the cracks are continuously ensured.
Drawings
FIG. 1 is a schematic diagram of a water-sand-gunpowder coupled blasting anti-reflection device for a coal mine.
FIG. 2 is a field process diagram of a method of using the water-sand-gunpowder coupled blasting anti-reflection device provided by the invention.
The reference numerals include:
In the figure: 1-a water sand bag; 2-blasting tube; 3-detonator; 4-conducting wires; 5-gunpowder roll; 6-water sand bag inner ring space; 7-water; 8-solid gravel; 9-a water filling valve; 10-a water injection pipe; 11-foot line; 12-drilling holes; 13-stemming; 14-coal wall; 15-a downhole water supply pipe; 16-an initiator; 17-coal seam; 18-high-pressure rubber tube; 19-a water pressure regulating pump; 20-a pressure gauge; 21-a high pressure shut-off valve; 101-coupling blasting anti-reflection component.
Detailed Description
In order to make the objects, technical solutions and advantages of the present technical solution more apparent, the present technical solution is further described in detail below in conjunction with the specific embodiments. It should be understood that the description is only illustrative and is not intended to limit the scope of the present technical solution.
Example 1
As shown in fig. 1, the water-sand-gunpowder coupling blasting permeability-increasing device for coal mines provided by the embodiment is used for increasing permeability and relieving pressure of a coal seam 17, the coal seam 17 is provided with a drill hole 12, the water-sand-gunpowder coupling blasting permeability-increasing device for coal mines comprises a coupling blasting permeability-increasing component 101, a foot line 11 and an exploder 16, wherein the coupling blasting permeability-increasing component 101 comprises a water sand bag 1, a detonator 3, a wire 4 and a gunpowder roll 5, the bag body of the water sand bag 1 is made of an elastic material, the water sand bag 1 is in a strip shape, the water sand bag 1 is sealed at the inner end face of the drill hole 12, the water sand bag 1 is positioned at the outer side opening of the drill hole 12, a water sand bag inner ring space 6 extending along a length square is formed at the center of the water sand bag, the detonator 3 and the gunpowder roll 5 form a blasting tube 2, the blasting tube 2 is inserted into the water sand bag inner ring space 6, the detonators 3 are connected with each other through the wire 4, and the detonators 3 are electrically connected with the exploder 16 through the foot line 11 and the detonators 3 positioned at the outermost side of the blasting tube 2; the mixture of solid gravel 8 and water 7 is filled in the water sand bag, a water injection pipe 10 is arranged in the outer end face of the water sand bag 1, and a water injection valve 9 is arranged at the outer end of the water injection pipe 10.
The outer diameter of the blasting tube 2 is smaller than the inner diameter of the inner ring space 6 of the water sand bag by 1cm-3cm, the outer diameter of the water sand bag 1 is smaller than the diameter of the fracturing hole by 1cm-3cm, and the whole length of the water sand bag 1 is smaller than the length of the drilling hole 12 by 4cm-6m.
The water sand bag 1 is made of elastic materials, the outer side and the inner side of the water sand bag can be expanded by 3cm-5cm, the pressure resistance is 0.2MPa-0.5MPa, the inner side of the end face of the water sand bag 1 is closed, the outer side of the water sand bag is opened, a detonator 3, a wire 4 and a gunpowder roll 5 contained in the blasting tube 2 are filled from the side opening of the end face B, and the length of the blasting tube 2 is equal to the length of an inner ring space 6 of the water sand bag. The water sand bag 1 in the embodiment is a rubber bag.
The water sand bag 1 is filled with solid gravel 8 in advance as a crack propping agent, the volume ratio of water 7 to the solid gravel 8 in the water sand bag 1 is 5:1-3:1, the solid gravel 8 comprises quartz sand or ceramsite, the diameter is about 0.4mm-0.9mm, and when the local stress is less than 15MPa (the burial depth is less than 600 m), the solid gravel 8 is quartz sand; when the ground stress is larger than 15MPa (the burial depth is larger than 600 m), the solid gravel 8 is selected from the stone ceramsite.
Example 2
As shown in fig. 2, the method for using the water-sand-gunpowder coupling blasting anti-reflection device for coal mine provided in the embodiment 1 is as follows:
and constructing the drilling holes 12 to the coal body at the position of the coal wall 14 in front of the mining, wherein the lengths of the drilling holes 12 are more than 10m, and the diameters of the drilling holes are not less than 42mm.
The coupling blasting anti-reflection component 101 is sent into a drill hole 12 for filling, a water injection valve 9 is sequentially connected with a high-pressure rubber tube 18, a water pressure regulating pump 19, a pressure gauge 20, a high-pressure stop valve 21 and a downhole water supply pipe 15, and the compressive strength of the high-pressure rubber tube 18 is 10-100MPa.
The water pressure regulating pump 19 is turned on, the water outlet pressure is regulated to be 0.2MPa-0.3MPa according to the indication of the pressure gauge 20, then the high-pressure stop valve 21 is turned on, the water pressure regulating pump 19 is communicated with the underground water supply pipe 15, after the water pressure regulating pump 19 shows that the water pressure is stabilized to be 0.2MPa-0.3MPa, the water injection valve 9 is turned on, water injection 7 is started to be implemented into the water sand bag 1, the volume of the water sand bag 1 is gradually expanded along with the increase of the water filling amount, the outer side of the water sand bag 1 is tightly attached to the outer wall of the drill hole 12, and the inner side of the water sand bag tightly holds the blasting pipe 2.
When the water pressure regulating pump 19 shows that the water pressure is close to 0.35MPa, the water injection valve 9 is closed, water injection is stopped, then the high-pressure stop valve 21 and the water pressure regulating pump 19 are sequentially closed, and the water sand bag 1 fully wraps the blasting pipe 2.
And filling the prepared stemming 13 into the drill hole 12 for plugging, wherein the plugging length is not less than 5m, guiding the foot line 11 to a safe detonation zone according to the relevant regulations of underground powder blasting of coal mine in the 'coal mine safety regulations', connecting the blaster 16 for detonation, and then removing the blasting device by a professional blasting technical engineer to finish all blasting anti-reflection procedures.
The foregoing is merely exemplary of the present invention, and those skilled in the art can make many variations in the specific embodiments and application scope according to the spirit of the present invention, as long as the variations do not depart from the spirit of the invention.
Claims (3)
1. The utility model provides a colliery water-sand-gunpowder coupling blasting anti-reflection device for make coal seam anti-reflection release, drilling, its characterized in that are seted up to the coal seam: the coal mine water-sand-gunpowder coupling blasting anti-reflection device comprises a coupling blasting anti-reflection component, a foot line and an exploder, wherein
The coupling blasting anti-reflection assembly comprises a water sand bag, detonators, wires and gunpowder rolls, wherein the bag body of the water sand bag is made of elastic materials, the water sand bag is in a strip shape, the water sand bag is positioned on the inner side end face of a drill hole to be closed, the water sand bag is positioned on the outer side of the drill hole to be opened, an inner ring space of the water sand bag extending along a length square is formed at the center of the water sand bag, the detonators and the gunpowder rolls form a blasting tube, the blasting tube is inserted in the inner ring space of the water sand bag, a plurality of detonators are connected with one another through the wires, and the detonator positioned on the outermost side of the blasting tube is electrically connected with the blaster through a leg wire;
The water sand bag is filled with a mixture of solid gravel and water, a water injection pipe is arranged in the outer end face of the water sand bag, and a water injection valve is arranged at the outer end of the water injection pipe;
The outer diameter of the blasting tube is smaller than the inner diameter of the inner ring space of the water sand bag by 1cm-3cm, and the outer diameter of the water sand bag is smaller than the diameter of the fracturing hole by 1cm-3cm;
The overall length of the water sand bag is smaller than the drilling length by 4m-6m;
the outer side and the inner side of the water sand bag can be expanded by 3-5cm, and the pressure resistance is 0.2-0.5MPa;
the length of the blasting tube is equal to the space length of the inner ring of the water sand bag;
The volume ratio of water filled in the water sand bag to the solid gravel is between 5:1 and 3:1.
2. The coal mine water-sand-gunpowder coupled blasting anti-reflection device according to claim 1, wherein: the solid gravel is quartz sand or haydite, and the diameter of the solid gravel is 0.4mm-0.9mm; when the ground stress is less than 15MPa or the burial depth is less than 600m, quartz sand is selected as the solid gravel; and when the ground stress is larger than 15MPa or the burial depth is larger than 600m, the solid gravel is selected from the stone ceramsite.
3. A method for using the water-sand-gunpowder coupling blasting anti-reflection device for coal mines, which is characterized in that the water-sand-gunpowder coupling blasting anti-reflection device for coal mines is used according to any one of claims 1-2, and is characterized in that:
step 1: feeding the coupling blasting anti-reflection component into a drill hole for filling, wherein a water injection valve is sequentially connected with a high-pressure rubber tube, a water pressure regulating pump, a pressure gauge, a high-pressure stop valve and a downhole water supply pipe, and the pressure resistance of the high-pressure rubber tube is 10-100 MPa;
Step 2: opening a water pressure regulating pump, regulating the water outlet pressure to be 0.2-0.3MPa according to the number of pressure gauges, then opening a high-pressure stop valve, communicating the water pressure regulating pump with a downhole water supply pipe, opening a water injection valve after the water pressure regulating pump shows that the water pressure is stable to be 0.2-0.3MPa, starting to inject water into a water sand bag, gradually expanding the volume of the water sand bag along with the increase of the water filling amount, tightly attaching the outer side of a drill hole and tightly holding a blasting pipe on the inner side of the water sand bag;
Step 3: when the water pressure regulating pump shows that the water pressure is close to 0.35MPa, the water injection valve is closed, water injection is stopped, then the high-pressure stop valve and the water pressure regulating pump are sequentially closed, and the blasting pipe is fully wrapped by the water sand bag;
Step 4: filling prepared stemming into a drill hole for plugging, wherein the plugging length is not less than 5m, guiding a foot line to a safe detonation zone according to relevant regulations of underground gunpowder blasting of a coal mine, connecting a detonator for detonation, and then removing a blasting device by a professional blasting technical engineer to finish all blasting anti-reflection procedures.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011391370.4A CN112412454B (en) | 2020-12-01 | 2020-12-01 | Water-sand-gunpowder coupling blasting anti-reflection device for coal mine and use method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011391370.4A CN112412454B (en) | 2020-12-01 | 2020-12-01 | Water-sand-gunpowder coupling blasting anti-reflection device for coal mine and use method |
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| CN112412454A CN112412454A (en) | 2021-02-26 |
| CN112412454B true CN112412454B (en) | 2024-04-30 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500019A (en) * | 2014-11-18 | 2015-04-08 | 辽宁工程技术大学 | Reinforced anti-reflection method for promoting gas extraction |
| CN206330497U (en) * | 2016-12-09 | 2017-07-14 | 魏华昌 | A kind of device for clogging blasthole |
| CN210289738U (en) * | 2019-08-20 | 2020-04-10 | 河南理工大学 | Coal seam hydraulic fracturing and hydraulic blasting coupling permeability increasing device |
| CN214247323U (en) * | 2020-12-01 | 2021-09-21 | 煤科集团沈阳研究院有限公司 | Water-sand-gunpowder coupling blasting permeability increasing device for coal mine |
-
2020
- 2020-12-01 CN CN202011391370.4A patent/CN112412454B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500019A (en) * | 2014-11-18 | 2015-04-08 | 辽宁工程技术大学 | Reinforced anti-reflection method for promoting gas extraction |
| CN206330497U (en) * | 2016-12-09 | 2017-07-14 | 魏华昌 | A kind of device for clogging blasthole |
| CN210289738U (en) * | 2019-08-20 | 2020-04-10 | 河南理工大学 | Coal seam hydraulic fracturing and hydraulic blasting coupling permeability increasing device |
| CN214247323U (en) * | 2020-12-01 | 2021-09-21 | 煤科集团沈阳研究院有限公司 | Water-sand-gunpowder coupling blasting permeability increasing device for coal mine |
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| CN112412454A (en) | 2021-02-26 |
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