CN203224428U - Experimental device for cracking low-permeability coal body to increase permeability by circulation pulse of high-pressure gas - Google Patents

Experimental device for cracking low-permeability coal body to increase permeability by circulation pulse of high-pressure gas Download PDF

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CN203224428U
CN203224428U CN 201320206034 CN201320206034U CN203224428U CN 203224428 U CN203224428 U CN 203224428U CN 201320206034 CN201320206034 CN 201320206034 CN 201320206034 U CN201320206034 U CN 201320206034U CN 203224428 U CN203224428 U CN 203224428U
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CN
China
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cylinder
hole
coal
pressure
gas
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CN 201320206034
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Chinese (zh)
Inventor
赵宝友
贾廷贵
张立新
李刚
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辽宁工程技术大学
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Priority to CN 201320206034 priority Critical patent/CN203224428U/en
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Publication of CN203224428U publication Critical patent/CN203224428U/en

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Abstract

The utility model discloses an experimental device for cracking a low-permeability coal body to increase permeability by the circulation pulse of a high-pressure gas, and belongs to the technical field of reinforcing and permeability-increasing for low-permeability coal seams. The experimental device disclosed by the utility model is used for enabling the high-pressure gas to cyclically impact the coal body for many times to crack to increase permeability via a force electro-induction electric control valve, as well as is simple to operate, low in cost, and obvious in permeability-increasing effect. The experimental device disclosed by the utility model comprises a coal body test sample, a blasting cylinder mechanism, a triaxial loading system, a high-pressure gas impact system and a coal body permeability measurement system, wherein the coal body test sample is composed of a coal briquette and a protection layer; the blasting cylinder mechanism is composed of an upper cylinder cover, a lower cylinder cover, a cylinder barrel, an upper press head and a lower press head; the triaxial loading system is composed of an axial pressure loading system and a confining pressure loading system; the high-pressure gas impact system is composed of a gas blasting gun, the force electro-induction electric control valve, a high-pressure gas storage tank, a multi-way valve, an air compressor and a gas source bottle; and the coal body permeability measurement system is composed of a methane gas bottle arranged outside the blasting cylinder mechanism, a water groove and a measuring cylinder.

Description

The anti-reflection experimental provision of hyposmosis coal body gases at high pressure cycle pulse fracturing
Technical field
The utility model belongs to this coal seam of hyposmosis and strengthens anti-reflection technical field, particularly relates to the anti-reflection experimental provision of a kind of hyposmosis coal body gases at high pressure cycle pulse fracturing.
Background technology
This coal seam of China's hyposmosis is strengthened anti-reflection technology and is mainly comprised wellhole blasting, waterfrac treatment etc.But wellhole blasting has the shortcoming that produces spark and can not repeat powder charge, and the expansion of waterfrac treatment crackle has terrestrial stress susceptibility and coal seam susceptibility, and the antireflective effect that makes above-mentioned this coal seam strengthen anti-reflection technology is undesirable, and the technology more complicated of above-mentioned technology.
The utility model content
Problem at the prior art existence, the utility model provides a kind of hyposmosis coal body gases at high pressure cycle pulse fracturing anti-reflection experimental provision, this device makes gases at high pressure by power electro-induction electrically-controlled valve, and repeatedly circulation impact coal body fracturing is anti-reflection, simple to operate, cost is low, antireflective effect is obvious.
To achieve these goals, the utility model adopts following technical scheme: the anti-reflection experimental provision of a kind of hyposmosis coal body gases at high pressure cycle pulse fracturing comprises coal body sample, explosion cylinder mechanism, three loading systems, gases at high pressure impact system and coal body permeability determination systems;
Described coal body sample is made up of coal cinder and protective seam, and described protective seam is arranged on the coal cinder sidewall all around;
Described explosion cylinder mechanism is made up of upper and lower cylinder head, cylinder barrel and upper and lower pressure head, cylinder barrel vertically arranges, be provided with therapeutic method to keep the adverse qi flowing downward cylinder cap in the bottom of cylinder barrel, be provided with the upper cylinder lid at the top of cylinder barrel, described upper and lower cylinder head and cylinder barrel form seal cavity; Be provided with axial compression at the middle part of upper cylinder lid and load through hole, be provided with the loam cake groove at the bottom center place of upper cylinder lid, the top of described seaming chuck is arranged in the loam cake groove, and the middle part on the seaming chuck vertical direction is provided with the seaming chuck through hole; Center of top place at therapeutic method to keep the adverse qi flowing downward cylinder cap is provided with the lower cover groove, and the bottom of described push-down head is provided with projection, and the projection of push-down head is arranged in the lower cover groove; Middle part on push-down head and therapeutic method to keep the adverse qi flowing downward cylinder cap vertical direction is respectively arranged with push-down head through hole and therapeutic method to keep the adverse qi flowing downward cylinder cap through hole, and push-down head through hole and therapeutic method to keep the adverse qi flowing downward cylinder cap through hole are connected; Be provided with the coal body sample between described upper and lower pressure head, the coal cinder of coal body sample is provided with vertical blast hole, and described blast hole is connected with the seaming chuck through hole;
Described three loading systems are made up of axial compression loading system and confined pressure loading system, described axial compression loading system is arranged on the top of seaming chuck, and the top of described axial compression loading system loads the outside that through hole is arranged on the explosion cylinder mechanism by the axial compression of upper cylinder lid in the explosion cylinder mechanism; Be provided with three through holes in the axial compression loading system, three through holes are made up of first, second, third through hole, and described first, second, third through hole is connected, and first through hole wherein is connected with the seaming chuck through hole of seaming chuck in the explosion cylinder mechanism; Described confined pressure loading system is arranged on the outside of explosion cylinder mechanism, the confined pressure loading system is connected with explosion cylinder mechanism inner space by the confined pressure connecting pipe, the confined pressure connecting pipe is provided with the 3rd hand control valve, between the 3rd hand control valve and the confined pressure loading system, be provided with the 3rd digital pressure gauge near the confined pressure connecting pipe of confined pressure loading system;
Described gases at high pressure impact system is made up of the gas explosion rifle that is arranged on explosion cylinder mechanism inside and the power electro-induction electrically-controlled valve, high pressure tank, multiport valve, air compressor machine and the gas source of the gas bottle that are arranged on explosion cylinder mechanism outside; The rifle head of described gas explosion rifle is arranged in the blast hole of coal body sample, is filled with the sealing of sealing of hole cementing agent between porch, gas explosion rifle and the blast hole of blast hole; One end of the gas piping that gas explosion gun breech portion is interior with being arranged on the seaming chuck through hole is connected, the other end of described gas piping is arranged in first through hole of three through holes by the seaming chuck through hole, second through hole of three through holes is connected by gas piping with an end of power electro-induction electrically-controlled valve, the other end of described power electro-induction electrically-controlled valve is connected by gas piping with an end of high pressure tank, and the other end of described high pressure tank is connected by gas piping with a port of multiport valve; Two ports in addition of described multiport valve are connected by gas piping with air compressor machine, gas source of the gas bottle respectively; Between power electro-induction electrically-controlled valve and the high pressure tank, be provided with the 5th digital pressure gauge near the gas piping of high pressure tank, gas piping between multiport valve and the gas source of the gas bottle is provided with the 4th hand control valve, between the 4th hand control valve and the gas source of the gas bottle, be provided with the 4th digital pressure gauge near the gas piping of gas source of the gas bottle;
Described coal body permeability determination system is made up of the methane gas cylinder, tank and the graduated cylinder that are arranged on explosion cylinder mechanism outside; Be connected by the methane gas piping between the third through-hole of three through holes in described methane gas cylinder and the axial compression loading system, the methane gas piping is provided with first hand control valve, between first hand control valve and the methane gas cylinder, be provided with first digital pressure gauge near the methane gas piping of methane gas cylinder; Be inverted in described tank and be provided with graduated cylinder, an end of methane wireway is connected with therapeutic method to keep the adverse qi flowing downward cylinder cap through hole, and the other end is arranged in the graduated cylinder; The methane wireway is provided with second hand control valve, between second hand control valve and the therapeutic method to keep the adverse qi flowing downward cylinder cap through hole, be provided with second digital pressure gauge near the methane wireway of therapeutic method to keep the adverse qi flowing downward cylinder cap through hole.
Bottom margin at described upper cylinder lid is provided with upper groove, be provided with low groove in the top of described therapeutic method to keep the adverse qi flowing downward cylinder cap, and upper and lower groove location is corresponding; The top of described cylinder barrel and bottom are separately positioned in the upper and lower groove.
Cover at described lower cylinder and to be provided with the cylinder hydraulic hand-hole, described confined pressure connecting pipe is connected with explosion cylinder mechanism inner space by the cylinder hydraulic hand-hole.
Be provided with groove in the lower surface of described seaming chuck and the upper surface of push-down head, the two ends of described coal body sample are separately positioned in the groove.
In described high pressure tank outer setting over-pressure safety device is arranged.
The hole depth of described blast hole is 2/3 of coal body specimen height.
The seal length of the sealing of hole cementing agent between described gas explosion rifle and the blast hole is 1/3 of blast hole hole depth.
Described gas explosion rifle rifle head is arranged on 1/2~2/3 position of blast hole hole depth.
The beneficial effects of the utility model:
The utility model provides a kind of hyposmosis coal body gases at high pressure cycle pulse fracturing anti-reflection experimental provision, and this device makes gases at high pressure by power electro-induction electrically-controlled valve, and repeatedly circulation impact coal body fracturing is anti-reflection, simple to operate, cost is low, antireflective effect is obvious.
Description of drawings
Fig. 1 is the structural representation of the anti-reflection experimental provision of hyposmosis coal body gases at high pressure cycle pulse fracturing of the present utility model;
Wherein, 1--coal cinder, 2--protective seam; the 3--blast hole, 4--gas explosion rifle, 5--sealing of hole cementing agent; the 6--cylinder barrel, 7--upper cylinder lid, 8--therapeutic method to keep the adverse qi flowing downward cylinder cap; the 9--seaming chuck, 10--push-down head, 11--upper cylinder cap bolt; 12--lower cylinder cap bolt, 13--push-down head bolt, 14--axial compression loading system; the 15--O-ring seal, 16--three through holes, 17--push-down head through hole; 18--cylinder hydraulic hand-hole, 19-the first hand control valve, 20-the second hand control valve; 21-the three hand control valve, 22-the four hand control valve, 23--power electro-induction electrically-controlled valve; 24-the first digital pressure gauge, 25-the second digital pressure gauge, 26-the three digital pressure gauge; 27-the four digital pressure gauge, 28-the five digital pressure gauge, 29--methane gas cylinder; 30--methane gas piping; 31--methane wireway, 32--tank, 33--graduated cylinder; 34--confined pressure loading system; 35--gas source of the gas bottle, 36--air compressor machine, 37--multiport valve; the 38--gas piping; the 39--high pressure tank, 40--over-pressure safety device, 41-seaming chuck through hole; 42--therapeutic method to keep the adverse qi flowing downward cylinder cap through hole; the 43--axial compression loads through hole, 44--loam cake groove, 45--lower cover groove; the 46--upper groove; 47-low groove, 48--projection, 49-confined pressure connecting pipe.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
As shown in Figure 1, the anti-reflection experimental provision of a kind of hyposmosis coal body gases at high pressure cycle pulse fracturing comprises coal body sample, explosion cylinder mechanism, three loading systems, gases at high pressure impact system and coal body permeability determination systems;
Described coal body sample is made up of coal cinder 1 and concrete cover 2, and described concrete cover 2 is arranged on coal cinder 1 sidewall all around;
Described explosion cylinder mechanism is made up of upper and lower cylinder head, cylinder barrel 6 and upper and lower pressure head, cylinder barrel 6 vertically arranges, be provided with therapeutic method to keep the adverse qi flowing downward cylinder cap 8 in the bottom of cylinder barrel 6, be provided with upper cylinder lid 7 at the top of cylinder barrel 6, described upper and lower cylinder head and cylinder barrel 6 form seal cavity; Be provided with axial compression at the middle part of upper cylinder lid 7 and load through hole 43, bottom center place at upper cylinder lid 7 is provided with loam cake groove 44, the top of described seaming chuck 9 is arranged in the loam cake groove 44, and the middle part on seaming chuck 9 vertical directions is provided with seaming chuck through hole 41; Center of top place at therapeutic method to keep the adverse qi flowing downward cylinder cap 8 is provided with lower cover groove 44, and the bottom of described push-down head 10 is provided with projection 48, and the projection 48 of push-down head 10 is arranged in the lower cover groove 45; Middle part on push-down head 10 and therapeutic method to keep the adverse qi flowing downward cylinder cap 8 vertical directions is respectively arranged with push-down head through hole 17 and therapeutic method to keep the adverse qi flowing downward cylinder cap through hole 42, and push-down head through hole 17 and therapeutic method to keep the adverse qi flowing downward cylinder cap through hole 42 are connected; Be provided with the coal body sample between described upper and lower pressure head, the coal cinder 1 of coal body sample is provided with vertical blast hole 3, and described blast hole 3 is connected with seaming chuck through hole 41;
Described three loading systems are made up of axial compression loading system 14 and confined pressure loading system 34, and described axial compression loading system 14 and confined pressure loading system 34 all adopt the loading system of MTS815.03 rock triaxial test device; Described axial compression loading system 14 is arranged on the top of seaming chuck 9, and the top of described axial compression loading system 14 loads the outside that through hole 43 is arranged on the explosion cylinder mechanism by the axial compression of upper cylinder lid 7 in the explosion cylinder mechanism; In axial compression loading system 14, be provided with three through holes 16, three through holes 16 are made up of first, second, third through hole, described first, second, third through hole is connected, and first through hole wherein is connected with the seaming chuck through hole 41 of seaming chuck 9 in the explosion cylinder mechanism; Described confined pressure loading system 34 is arranged on the outside of explosion cylinder mechanism, confined pressure loading system 34 is connected with cylinder hydraulic hand-hole 18 by confined pressure connecting pipe 49, confined pressure connecting pipe 49 is provided with between the 3rd hand control valve 21, the three hand control valves 21 and the confined pressure loading system 34, the confined pressure connecting pipe 49 of close confined pressure loading system 34 is provided with the 3rd digital pressure gauge 26;
Described gases at high pressure impact system is made up of the gas explosion rifle 4 that is arranged on explosion cylinder mechanism inside and the power electro-induction electrically-controlled valve 23, high pressure tank 39, multiport valve 37, air compressor machine 36 and the gas source of the gas bottle 35 that are arranged on explosion cylinder mechanism outside; The rifle head of described gas explosion rifle 4 is arranged in the blast hole 3 of coal body sample, is filled with 5 sealings of sealing of hole cementing agent between porch, gas explosion rifle 4 and the blast hole 3 of blast hole 3; Gas explosion rifle 4 afterbodys are connected with a end of gas piping 38 in being arranged on seaming chuck through hole 41, the other end of described gas piping 38 is arranged in first through hole of three through holes 16 by seaming chuck through hole 41, second through hole of three through holes 16 is connected by gas piping 38 with an end of power electro-induction electrically-controlled valve 23, the other end of described power electro-induction electrically-controlled valve 23 is connected by gas piping 38 with an end of high pressure tank 39, and the other end of described high pressure tank 39 is connected by gas piping 38 with a port of multiport valve 37; Described power electro-induction electrically-controlled valve 23 discharges the gases at high pressure circulation impact coal cinder 1 in the high pressure tank 39 automatically, it is anti-reflection to make coal cinder 1 crack fracturing, and two ports in addition of described multiport valve 37 are connected by gas piping 38 with air compressor machine 36, gas source of the gas bottle 35 respectively; Between power electro-induction electrically-controlled valve 23 and the high pressure tank 39, be provided with the 5th digital pressure gauge 28 near the gas piping 38 of high pressure tank 39, gas piping 38 between multiport valve 37 and the gas source of the gas bottle 35 is provided with between the 4th hand control valve 22, the four hand control valves 22 and the gas source of the gas bottle 35, the gas piping 38 of close gas source of the gas bottle 35 is provided with the 4th digital pressure gauge 27;
Described coal body permeability determination system is made up of the methane gas cylinder 29 that is arranged on explosion cylinder mechanism outside, tank 32 and graduated cylinder 33; Be connected by methane gas piping 30 between the third through-hole of three through holes 16 in described methane gas cylinder 29 and the axial compression loading system, methane gas piping 30 is provided with between first hand control valve, 19, the first hand control valves 19 and the methane gas cylinder 29, the methane gas piping 30 of close methane gas cylinder 29 is provided with first digital pressure gauge 24; Be inverted in described tank 32 and be provided with graduated cylinder 33, an end of methane wireway 31 is connected with therapeutic method to keep the adverse qi flowing downward cylinder cap through hole 42, and the other end is arranged in the graduated cylinder 33; Methane wireway 31 is provided with between second hand control valve, 20, the second hand control valves 20 and the therapeutic method to keep the adverse qi flowing downward cylinder cap through hole 42, the methane wireway 31 of close therapeutic method to keep the adverse qi flowing downward cylinder cap through hole 42 is provided with second digital pressure gauge 25.
Bottom margin at described upper cylinder lid 7 is provided with upper groove 46, be provided with low groove 47 in the top of described therapeutic method to keep the adverse qi flowing downward cylinder cap 8, and upper and lower groove location is corresponding; The top of described cylinder barrel 6 and bottom are separately positioned in the upper and lower groove.
Described upper cylinder lid 7 is connected by upper cylinder cap bolt 11 with cylinder barrel 6, and therapeutic method to keep the adverse qi flowing downward cylinder cap 8 is connected by lower cylinder cap bolt 12 with cylinder barrel 6, is connected by push-down head bolt 13 between push-down head 10 and the therapeutic method to keep the adverse qi flowing downward cylinder cap 8.
Described therapeutic method to keep the adverse qi flowing downward cylinder cap 8 is provided with cylinder hydraulic hand-hole 18, and described confined pressure connecting pipe 49 is connected with explosion cylinder mechanism inner space by cylinder hydraulic hand-hole 18.
Be provided with the groove of dark 5mm in the upper surface of the lower surface of described seaming chuck 9 and push-down head 10, the two ends of described coal body sample are separately positioned in the groove.
Described coal body sample is by highly being that 300mm, width are that the regular hexahedron coal cinder 1 of 300mm and concrete cover 2 that thickness is 50mm constitute.
In described high pressure tank 39 outer setting over-pressure safety device 40 is arranged.
The hole depth of described blast hole 3 is 2/3 of coal body specimen height.
The diameter of described blast hole 3 is 20mm.
Axial compression between described axial compression loading system 14 and upper cylinder lid 7 loads in the through hole 43 and is provided with O-ring seal 15.
Described sealing of hole cementing agent 5 adopts high-strength concrete or the high-strength resin glue of rapid hardening, and sealed borehole length is 1/3 of blast hole 3 hole depths.
Described methane gas piping 30, methane wireway 31, confined pressure connecting pipe 49 and gas piping 38 are steel pipe.
Described gas source of the gas bottle 35 adopts the nitrogen gas cylinder.
Described gas explosion rifle 4 rifle heads place 1/2~2/3 position of blast hole 3 hole depths.
Described over-pressure safety device 40 is the closed circular tubular, adopts high-strength steel sheet parcel high pressure tank 39 seamless being welded.
Air compressor machine 36 models that the utility model adopts are W-2.0/400; Power electro-induction electrically-controlled valve 23 models are SVY series high voltage type solenoid valve; High pressure tank 39 models are HJL400-106~180-5.6.
Below in conjunction with a description of drawings use of the present utility model:
Open first, second hand control valve, 0.2~0.4MPa methane gas enters in the blast hole 3 of coal cinder 1 by methane gas piping 30, in coal cinder 1, ooze out again, in methane wireway 31 enters graduated cylinder 33 in the tank 32, be full of water in tank 32 and the graduated cylinder 33, and graduated cylinder 33 is inverted in the tank 32, adopt draining water gathering of gas law can measure anti-reflection before or anti-reflection after the coal body permeability; Close first, second hand control valve, open the 3rd hand control valve 21, start three loading systems, slowly synchronously three on coal body sample is loaded on (axial compression 6MPa after setting shaft, the confined pressure value, confined pressure 4MPa), open the 4th hand control valve 22, start air compressor machine 36, the gas in the gas source of the gas bottle 35 is pressurized and be delivered in the high pressure tank 39.When the gaseous tension in the high pressure tank 39 reaches preset value (15MPa), power electro-induction electrically-controlled valve 23 is opened automatically, gases at high pressure in the high pressure tank 39 through gas piping 38 by the blast hole 3 of gas explosion rifle 4 in coal cinder 1 in abrupt release, impact coal cinder 1, air compressor machine 36 continues pressure gas, after the gaseous tension in the high pressure tank 39 reaches preset value (15MPa) again, discharge and impact coal cinder 1 again, so move in circles and impact coal cinder 1, make coal cinder 1 produce a large amount of quick-fried living cracks, obtain the antireflective effect of expection.

Claims (8)

1. the anti-reflection experimental provision of hyposmosis coal body gases at high pressure cycle pulse fracturing is characterized in that comprising coal body sample, explosion cylinder mechanism, three loading systems, gases at high pressure impact system and coal body permeability determination systems;
Described coal body sample is made up of coal cinder and protective seam, and described protective seam is arranged on the coal cinder sidewall all around;
Described explosion cylinder mechanism is made up of upper and lower cylinder head, cylinder barrel and upper and lower pressure head, cylinder barrel vertically arranges, be provided with therapeutic method to keep the adverse qi flowing downward cylinder cap in the bottom of cylinder barrel, be provided with the upper cylinder lid at the top of cylinder barrel, described upper and lower cylinder head and cylinder barrel form seal cavity; Be provided with axial compression at the middle part of upper cylinder lid and load through hole, be provided with the loam cake groove at the bottom center place of upper cylinder lid, the top of described seaming chuck is arranged in the loam cake groove, and the middle part on the seaming chuck vertical direction is provided with the seaming chuck through hole; Center of top place at therapeutic method to keep the adverse qi flowing downward cylinder cap is provided with the lower cover groove, and the bottom of described push-down head is provided with projection, and the projection of push-down head is arranged in the lower cover groove; Middle part on push-down head and therapeutic method to keep the adverse qi flowing downward cylinder cap vertical direction is respectively arranged with push-down head through hole and therapeutic method to keep the adverse qi flowing downward cylinder cap through hole, and push-down head through hole and therapeutic method to keep the adverse qi flowing downward cylinder cap through hole are connected; Be provided with the coal body sample between described upper and lower pressure head, the coal cinder of coal body sample is provided with vertical blast hole, and described blast hole is connected with the seaming chuck through hole;
Described three loading systems are made up of axial compression loading system and confined pressure loading system, described axial compression loading system is arranged on the top of seaming chuck, and the top of described axial compression loading system loads the outside that through hole is arranged on the explosion cylinder mechanism by the axial compression of upper cylinder lid in the explosion cylinder mechanism; Be provided with three through holes in the axial compression loading system, three through holes are made up of first, second, third through hole, and described first, second, third through hole is connected, and first through hole wherein is connected with the seaming chuck through hole of seaming chuck in the explosion cylinder mechanism; Described confined pressure loading system is arranged on the outside of explosion cylinder mechanism, the confined pressure loading system is connected with explosion cylinder mechanism inner space by the confined pressure connecting pipe, the confined pressure connecting pipe is provided with the 3rd hand control valve, between the 3rd hand control valve and the confined pressure loading system, be provided with the 3rd digital pressure gauge near the confined pressure connecting pipe of confined pressure loading system;
Described gases at high pressure impact system is made up of the gas explosion rifle that is arranged on explosion cylinder mechanism inside and the power electro-induction electrically-controlled valve, high pressure tank, multiport valve, air compressor machine and the gas source of the gas bottle that are arranged on explosion cylinder mechanism outside; The rifle head of described gas explosion rifle is arranged in the blast hole of coal body sample, is filled with the sealing of sealing of hole cementing agent between porch, gas explosion rifle and the blast hole of blast hole; One end of the gas piping that gas explosion gun breech portion is interior with being arranged on the seaming chuck through hole is connected, the other end of described gas piping is arranged in first through hole of three through holes by the seaming chuck through hole, second through hole of three through holes is connected by gas piping with an end of power electro-induction electrically-controlled valve, the other end of described power electro-induction electrically-controlled valve is connected by gas piping with an end of high pressure tank, and the other end of described high pressure tank is connected by gas piping with a port of multiport valve; Two ports in addition of described multiport valve are connected by gas piping with air compressor machine, gas source of the gas bottle respectively; Between power electro-induction electrically-controlled valve and the high pressure tank, be provided with the 5th digital pressure gauge near the gas piping of high pressure tank, gas piping between multiport valve and the gas source of the gas bottle is provided with the 4th hand control valve, between the 4th hand control valve and the gas source of the gas bottle, be provided with the 4th digital pressure gauge near the gas piping of gas source of the gas bottle;
Described coal body permeability determination system is made up of the methane gas cylinder, tank and the graduated cylinder that are arranged on explosion cylinder mechanism outside; Be connected by the methane gas piping between the third through-hole of three through holes in described methane gas cylinder and the axial compression loading system, the methane gas piping is provided with first hand control valve, between first hand control valve and the methane gas cylinder, be provided with first digital pressure gauge near the methane gas piping of methane gas cylinder; Be inverted in described tank and be provided with graduated cylinder, an end of methane wireway is connected with therapeutic method to keep the adverse qi flowing downward cylinder cap through hole, and the other end is arranged in the graduated cylinder; The methane wireway is provided with second hand control valve, between second hand control valve and the therapeutic method to keep the adverse qi flowing downward cylinder cap through hole, be provided with second digital pressure gauge near the methane wireway of therapeutic method to keep the adverse qi flowing downward cylinder cap through hole.
2. the anti-reflection experimental provision of hyposmosis coal body gases at high pressure cycle pulse fracturing according to claim 1, it is characterized in that being provided with upper groove at the bottom margin of described upper cylinder lid, top at described therapeutic method to keep the adverse qi flowing downward cylinder cap is provided with low groove, and upper and lower groove location is corresponding; The top of described cylinder barrel and bottom are separately positioned in the upper and lower groove.
3. the anti-reflection experimental provision of hyposmosis coal body gases at high pressure cycle pulse fracturing according to claim 1, it is characterized in that covering at described lower cylinder and be provided with the cylinder hydraulic hand-hole, described confined pressure connecting pipe is connected with explosion cylinder mechanism inner space by the cylinder hydraulic hand-hole.
4. the anti-reflection experimental provision of hyposmosis coal body gases at high pressure cycle pulse fracturing according to claim 1, it is characterized in that being provided with groove in the lower surface of described seaming chuck and the upper surface of push-down head, the two ends of described coal body sample are separately positioned in the groove.
5. the anti-reflection experimental provision of hyposmosis coal body gases at high pressure cycle pulse fracturing according to claim 1 is characterized in that in described high pressure tank outer setting over-pressure safety device being arranged.
6. the anti-reflection experimental provision of hyposmosis coal body gases at high pressure cycle pulse fracturing according to claim 1, the hole depth that it is characterized in that described blast hole is 2/3 of coal body specimen height.
7. the anti-reflection experimental provision of hyposmosis coal body gases at high pressure cycle pulse fracturing according to claim 1, the seal length that it is characterized in that the sealing of hole cementing agent between described gas explosion rifle and the blast hole is 1/3 of blast hole hole depth.
8. the anti-reflection experimental provision of hyposmosis coal body gases at high pressure cycle pulse fracturing according to claim 1 is characterized in that described gas explosion rifle rifle head is arranged on 1/2~2/3 position of blast hole hole depth.
CN 201320206034 2013-04-22 2013-04-22 Experimental device for cracking low-permeability coal body to increase permeability by circulation pulse of high-pressure gas CN203224428U (en)

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Application Number Priority Date Filing Date Title
CN 201320206034 CN203224428U (en) 2013-04-22 2013-04-22 Experimental device for cracking low-permeability coal body to increase permeability by circulation pulse of high-pressure gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320206034 CN203224428U (en) 2013-04-22 2013-04-22 Experimental device for cracking low-permeability coal body to increase permeability by circulation pulse of high-pressure gas

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103234890A (en) * 2013-04-22 2013-08-07 辽宁工程技术大学 Low-permeability coal high-pressure gas cycle pulse fracturing anti-reflection experimental device
CN103940719A (en) * 2014-04-15 2014-07-23 西安科技大学 Coal body permeability characteristic testing system and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103234890A (en) * 2013-04-22 2013-08-07 辽宁工程技术大学 Low-permeability coal high-pressure gas cycle pulse fracturing anti-reflection experimental device
CN103940719A (en) * 2014-04-15 2014-07-23 西安科技大学 Coal body permeability characteristic testing system and method

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