CN110497320A - Mixing high-pressure abrasive material gas jet coal seam cutting pressure relief device and slotting process afterwards - Google Patents
Mixing high-pressure abrasive material gas jet coal seam cutting pressure relief device and slotting process afterwards Download PDFInfo
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- CN110497320A CN110497320A CN201910927451.2A CN201910927451A CN110497320A CN 110497320 A CN110497320 A CN 110497320A CN 201910927451 A CN201910927451 A CN 201910927451A CN 110497320 A CN110497320 A CN 110497320A
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- 239000003082 abrasive agent Substances 0.000 title claims abstract description 111
- 239000003245 coal Substances 0.000 title claims abstract description 56
- 238000005520 cutting process Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000008569 process Effects 0.000 title abstract description 6
- 238000005553 drilling Methods 0.000 claims abstract description 56
- 239000002245 particle Substances 0.000 claims abstract description 24
- 239000004576 sand Substances 0.000 claims description 10
- 230000035699 permeability Effects 0.000 claims description 7
- 239000003599 detergent Substances 0.000 claims description 6
- 230000006872 improvement Effects 0.000 claims description 5
- 238000013461 design Methods 0.000 claims description 3
- 230000003628 erosive effect Effects 0.000 claims description 3
- 238000011017 operating method Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 230000036346 tooth eruption Effects 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 2
- 241001074085 Scophthalmus aquosus Species 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 12
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000004080 punching Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/04—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass
- B24C1/045—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass for cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C3/00—Abrasive blasting machines or devices; Plants
- B24C3/02—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
- B24C3/04—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other stationary
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
- B24C7/0053—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier with control of feed parameters, e.g. feed rate of abrasive material or carrier
- B24C7/0061—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier with control of feed parameters, e.g. feed rate of abrasive material or carrier of feed pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
Abstract
Release after punching the invention belongs to underground coal mine is anti-reflection and gas takes out technical field, specifically disclose a kind of mixing high-pressure abrasive material gas jet coal seam cutting pressure relief device and slotting process afterwards, device includes gas generating assembly, the feeding abrasive material component being connected with gas generating assembly outlet side, conveyer is rotated with the gas-particle two-phase that gas generating assembly and feeding abrasive material module outlet are connected simultaneously, the gas-particle two-phase rotation conveyer outlet is equipped with the first double-layer drill rod, the outlet of first double-layer drill rod is equipped with drilling machine, the drilling machine outlet is additionally provided with the second double-layer drill rod, second double-layer drill rod end is equipped with the rear Mixed drilling bit for coal seam cutting, the pressure that air compressor provides is divided into biggish two gas circuits of pressure difference by pressure reducing valve by the present apparatus, and low pressure abrasive material gas and high pressure gas are delivered to simultaneously using gas-particle two-phase rotation conveyer In double-layer drill rod in the present invention, finally mixing generates good slot effect after bit head is carried out using jet pump technology.
Description
Technical field
The invention belongs to after underground coal mine punching release is anti-reflection and gas take out technical field more particularly to it is a kind of after it is mixed
Formula high-pressure abrasive material gas jet coal seam cutting pressure relief device and slotting process.
Background technique
Coal and gas are one of accidents common in coal mine, the exploitation of coal resources in China are drastically influenced, by height
It constructs in gas, low air permeability coal seam extraction borehole, carrying out gas drainage is control coal mine gas disaster, realizes that the gas energy is comprehensive
Close the important means utilized.But as mining depth increases, the further complexity of geological conditions keeps underground gas extraction more tired
It is difficult, it is therefore desirable to further to strengthen gas drainage technology.Underground uses waterpower measure by increasing cracks in coal seam number more at present
Amount, improves coal seam permeability to strengthen gas pumping effect at release stress of coal seam, but the waterpower release skill in weak seam
Art will lead to collapse hole, plug-hole phenomenon reduces gas pumping effect instead, and parsing and migration meeting of the water to gas in coal seam
Have an adverse effect, research shows that after the outside fluids invaded coal layer such as hydraulic fracturing, since capillary force delay acts on, hole
Outside fluid cannot be completely exhausted out coal seam by negative pressure, increase coal seam water saturation, and gas permeation rate reduces, after water
Setting intrusion not only can be such that desorption of mash gas amount greatly reduces, but also can make the termination time advance of gasresolution, mixed before existing
Formula high-pressure abrasive material gas jet is difficult to apply in underground site actual production, and preceding mixing feed is very tight to pipeline abrasion
Weight.
Summary of the invention
The object of the present invention is to provide a kind of rear mixing high-pressure abrasive material gas jet coal seam cutting pressure relief device and slot sides
Method.
In order to achieve the above objectives, the technical solution adopted by the present invention is that:
Mixing high-pressure abrasive material gas jet coal seam cutting pressure relief device after a kind of, including gas generating assembly, with gas generation group
The connected feeding abrasive material component in part outlet side, the gas-particle two-phase being connected simultaneously with gas generating assembly and feeding abrasive material module outlet
Conveyer is rotated, the gas-particle two-phase rotation conveyer outlet is equipped with the first double-layer drill rod, and the outlet of the first double-layer drill rod, which is equipped with, bores
Machine, the drilling machine outlet are additionally provided with the second double-layer drill rod, and the second double-layer drill rod end is equipped with bores for the rear mixing of coal seam cutting
Head.
Further, the gas generating assembly includes screw air compressor, is passed through with screw air compressor
Pipeline connected air accumulator is additionally provided with pressure gauge, air accumulator both ends on the pipeline between screw air compressor and air accumulator
Import and export be equipped with needle-valve, pipeline is divided into low pressure air delivering pipeline and high pressure gas pipeline road by threeway by reservoir outlet,
The high pressure gas pipeline road is equipped with the first pressure reducing valve, and low pressure air delivering pipeline is equipped with the second pressure reducing valve, the low pressure appendix
Road is connected with feeding abrasive material component, and the high pressure gas pipeline road is connected with gas-particle two-phase rotation conveyer.
Further, the feeding abrasive material component includes the low pressure gas circuit one being connected with low pressure air delivering pipeline, low pressure gas circuit
Two and abrasive can, the low pressure gas circuit one and low pressure gas circuit second is that distinguish connection by threeway by low pressure air delivering pipeline, it is described
Be additionally provided with abrasive inlet on abrasive can, abrasive material pot bottom is equipped with abrasive material flow control valve, the low pressure gas circuit one by threeway with
The abrasive material outlet conduit of abrasive material flow control valve lower end is connected, and low pressure gas circuit two is connected with abrasive can inlet ductwork, abrasive material outlet
Pipeline is connected with gas-particle two-phase rotation conveyer, and the low pressure gas circuit one is equipped with third pressure reducing valve, and low pressure gas circuit two is equipped with
4th pressure reducing valve.
Further, the gas-particle two-phase rotation conveyer includes shell, and the supply air line being connected with shell and confession
Sandpipe road, the supply air line are connected with high pressure gas pipeline road, and the sand supplying pipeline is connected with abrasive material export pipeline, described
It is additionally provided with rotating seal component in shell, is equipped with inside the rotating seal component and is respectively communicated with supply air line and sand supplying pipeline
Channel, rotating seal component outlet be equipped with first double-layer drill rod being connected with its internal pipeline, the first double-layer drill rod
And second be connected between double-layer drill rod by a drilling machine.
Further, first double-layer drill rod and the second double-layer drill rod include outer bar and interior bar, and interior bar is high pressure gas
Road is low pressure abrasive material gas circuit between interior bar and outer bar, and described outer bar one end is equipped with outer bar female connector, and the outer bar other end is equipped with outer bar
Pin end is equipped with interior bar pin end close to outer bar female connector one end in the interior bar, sets in interior bar close to outer bar pin end one end
There is interior bar female connector, is equipped with annular groove on the right side of interior bar pin end in the interior bar, is also set between the interior bar and outer bar
There is drilling rod baffle.
Further, the drilling rod baffle is circle, and drilling rod baffle center is equipped with high-pressure gas circuit air hole, drilling rod baffle circle
Week is equipped with multiple low pressure abrasive airs Reuter stomata.
Further, the rear Mixed drilling bit includes drill body, the cutting teeth on the right side of drill body, drill body
Left-side center is axially arranged with high-pressure gas pipeline, and the high-pressure gas pipeline is connected to the high-pressure gas circuit of the second double-layer drill rod and sets
It sets, high-pressure gas pipeline end radial symmetric is provided with jet stream Unit injector, is equipped with low pressure on the outside of drill body high-pressure gas pipeline
Abrasive material gas piping, forms one outlet channel between the low pressure abrasive material gas tube outlet and jet stream Unit injector, outlet is logical
Road root forms the suction chamber of a rectangle, and exit passageway side wall forms horn-like exit passageway by the throat being arranged, out
The mouth most narrow place in channel is mixing tube, is diffuser on the outside of mixing tube, the low pressure abrasive material gas piping and the second double-layer drill rod are most
Right end low pressure abrasive material gas circuit is connected.
A kind of slotting process using rear mixing high-pressure abrasive material gas jet coal seam cutting release permeability improvement device, including it is following
Step:
(1) drill hole of drilling machine is used, design hole depths is drilled into and stops boring, move back and be drilled at required slot position；
(2) screw air compressor and storage cylinder are opened, the first, second, third pressure reducing valve is adjusted, close the 4th pressure reducing valve and
Abrasive material flow control valve utilizes high pressure gas detergent line, double-layer drill rod and drill bit.
(3) abrasive material is added in abrasive can in advance, adjusting first and second pressure reducing valve makes two pipelines form high and low calm the anger
Body adjusts third, the 4th pressure reducing valve makes two pressure of low pressure gas circuit keep abrasive material suitable greater than air pressure in the control abrasive can of low pressure gas circuit one
Gas circuit is added in benefit, further adjusts abrasive material mass flow, low pressure abrasive material gas and high pressure in abrasive material flow control valve control gas circuit
Gas Mixed drilling bit after double-layer drill rod is delivered to carries out erosion to coal seam after nozzle sprays, with bit in drilling
High pressure annular abradant jet is formed to incising coal seam, under situation of observation drilling orifice producing coal continues after aperture gushes out without slack coal
Slot operation is carried out at one position, closes all pressure reducing valves and air screw compression after completing the slot of the drilling coal section
Machine；
(4) operating procedure in (2) is repeated after the completion of use to move back using high pressure gas detergent line, double-layer drill rod, rear Mixed drilling bit
It bores and repeats the slot operation that step (3) carry out next hole.
Further, step (2) the mesohigh airline pressure is 4MPa, abrasive material quality stream when low pressure gas circuit is 0.3MPa
Amount is 10g/s, and slot depth is 1m, and during slot, gently to press slow-speed.
Present invention has the advantage that
1. the pressure that air compressor provides is divided into biggish two gas circuits of pressure difference by pressure reducing valve by the present apparatus, and uses gas
Low pressure abrasive material gas and high pressure gas are delivered in the double-layer drill rod in the present invention simultaneously Gu two-phase rotates conveyer, finally existed
Mixing generates good slot effect after bit head is carried out using jet pump technology；
2. being mixed after transporting abrasive material and high pressure gas respectively at the drill bit using gas-particle two-phase rotation conveyer and double-layer drill rod
Method can effectively reduce the abrasion to drilling rod and pipeline compared to preceding mixed method, reduce the pressure drop of high pressure gas, reduce
It improves the effect that coal is broken in abrasive material gas jet along journey energy loss；
3. Mixed drilling bit uses jet pump technology after, more safe and efficient, can adjust high-pressure gas circuit pressure and low by valve body
The mass flow of abrasive material gas is pressed to adapt to different broken coal modes, improves coal seam cutting effect；
It, can be to mixed height 4. the mixing tube that drill bit side wall is radially arranged, diffuser compound action are equivalent to Laval-cavity nozzle
Pressure abrasive material gas further speeds up so as to improve slot effect；
5. collapse hole, plug-hole etc. can be effectively reduced now by carrying out slot using high-pressure abrasive material gas jet compared to waterpower measure
As avoiding water lock situation from occurring, improving coal seam pressure relief and permeability improvement effect, can further strengthen gas drainage efficiency.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is that gas-particle two-phase rotates conveyer sectional view in the present invention；
Fig. 3 is double-layer drill rod sectional view in the present invention；
Fig. 4 is double-layer drill rod baffle schematic diagram in the present invention；
Fig. 5 is rear Mixed drilling bit sectional view in the present invention；
1, screw air compressor；2, pressure gauge；3, air accumulator；4, needle-valve；5, the first pressure reducing valve；6, the second pressure reducing valve；7,
Low pressure air delivering pipeline；8, high pressure gas pipeline road；9, third pressure reducing valve；10, the 4th pressure reducing valve；11, abrasive can；12, abrasive material flow
Control valve；13, gas-particle two-phase rotates conveyer；13.1, supply air line；13.2, sand supplying pipeline；13.3, shell；13.4, rotation
Seal assembly；14, drilling machine；15, the second double-layer drill rod；15.1, outer bar female connector；15.2, interior bar pin end；15.3, annular is recessed
Slot；15.4, drilling rod baffle；15.41, low pressure abrasive air Reuter stomata；15.42, high-pressure gas circuit air hole；15.5, low pressure abrasive material
Gas circuit；15.6, high-pressure gas circuit；15.7, outer bar pin end；15.8, interior bar female connector；16, rear Mixed drilling bit；16.1, low pressure is ground
Expect gas piping；16.2, high-pressure gas pipeline；16.3, suction chamber；16.4, jet stream Unit injector；16.5, mixing tube；16.6, expand
Separate tube；17, the first double-layer drill rod.
Specific embodiment
As shown, mixing high-pressure abrasive material gas jet coal seam cutting pressure relief device after a kind of, including gas generating assembly,
The feeding abrasive material component being connected with gas generating assembly outlet side, with gas generating assembly and the same phase of feeding abrasive material module outlet
Gas-particle two-phase even rotates conveyer 13, and the gas-particle two-phase rotation conveyer 13, which exports, is equipped with the first double-layer drill rod 17, and first
The outlet of double-layer drill rod 17 is equipped with drilling machine 14, and the outlet of drilling machine 14 is additionally provided with the second double-layer drill rod 15,15 end of the second double-layer drill rod
Portion is equipped with the rear Mixed drilling bit 16 for coal seam cutting.
The gas generating assembly includes screw air compressor 1, is connected with screw air compressor 1 by pipeline
Air accumulator 3, be additionally provided with pressure gauge 2 on the pipeline between screw air compressor 1 and air accumulator 3,3 both ends of air accumulator into
Exit is equipped with needle-valve 4, and pipeline is divided into low pressure air delivering pipeline 7 and high pressure gas pipeline road 8 by threeway by the outlet of air accumulator 3,
The high pressure gas pipeline road 8 is equipped with the first pressure reducing valve 5, and low pressure air delivering pipeline 7 is equipped with the second pressure reducing valve 6, and the low pressure is defeated
Air pipe 7 is connected with feeding abrasive material component, and the high pressure gas pipeline road 8 is connected with gas-particle two-phase rotation conveyer 13, specifically makes
Used time by decompression valve regulation formed high and low pressure gas circuit, then through in air delivering pipeline low pressure air delivering pipeline 7 and high pressure gas pipeline road
High and low pressure gas is delivered to feeding abrasive material component and gas-particle two-phase rotation conveyer 13 by 8.
Further, the feeding abrasive material component includes the low pressure gas circuit one being connected with low pressure air delivering pipeline 7, low pressure gas circuit
Two and abrasive can 11, the low pressure gas circuit one and low pressure gas circuit second is that passing through threeway by low pressure air delivering pipeline 7 distinguish connection, institute
It states and is additionally provided with abrasive inlet on abrasive can 11,11 bottom of abrasive can is equipped with abrasive material flow control valve 12, and abrasive material flow control valve can
To control in gas circuit abrasive material mass flow so as to improve slot effect, the low pressure gas circuit one passes through threeway and abrasive material flow control
The abrasive material outlet conduit of 12 lower end of valve is connected, and low pressure gas circuit two is connected with 11 inlet ductwork of abrasive can, abrasive material outlet conduit and gas
It is connected Gu two-phase rotates conveyer 13, the low pressure gas circuit one is equipped with third pressure reducing valve 9, and low pressure gas circuit two is equipped with the 4th and subtracts
Pressure valve 10, it is controllable by adjusting the low pressure gas circuit one that the 4th pressure reducing valve makes two pressure of low pressure gas circuit be greater than the control of third pressure reducing valve
Air pressure makes abrasive material that gas circuit smoothly be added in abrasive can.
Further, the gas-particle two-phase rotation conveyer 13 includes shell 13.3, and the confession being connected with shell 13.3
Air pipe 13.1 and sand supplying pipeline 13.2, the supply air line 13.1 are connected with high pressure gas pipeline road 8, the sand supplying pipeline
13.2 are connected with abrasive material export pipeline, and rotating seal component 13.4, the rotatory sealing group are additionally provided in the shell 13.3
The channel being respectively communicated with supply air line 13.1 and sand supplying 13.2 is equipped with inside part 13.4, the outlet of rotating seal component 13.4 is equipped with
One the first double-layer drill rod 17 being connected with its internal pipeline, passes through between the first double-layer drill rod 17 and the second double-layer drill rod 15
One drilling machine 14 is connected.
Further, first double-layer drill rod 17 and the second double-layer drill rod 15 include outer bar and interior bar, and interior bar is height
Pressure gas channel 15.6 is low pressure abrasive material gas circuit 15.5 between interior bar and outer bar, and described outer bar one end is equipped with outer bar female connector 15.1, outside
The bar other end is equipped with outer bar pin end 15.7, and close 15.1 one end of outer bar female connector is equipped with interior bar pin end in the interior bar
15.2, interior bar female connector 15.8 is equipped with close to 15.7 one end of outer bar pin end in interior bar, close to interior bar pin end in the interior bar
15.2 right sides are equipped with annular groove 15.3, and drilling rod baffle 15.4 is additionally provided between the interior bar and outer bar;Further, described
Drilling rod baffle 15.4 is circle, and 15.4 center of drilling rod baffle is equipped with high-pressure gas circuit air hole 15.42, and 15.4 circumference of drilling rod baffle is set
There is multiple low pressure abrasive airs Reuter stomata 15.41.
Further, the rear Mixed drilling bit includes drill body, the cutting teeth on the right side of drill body, drill body
Left-side center is axially arranged with high-pressure gas pipeline 16.2, the high pressure gas of the high-pressure gas pipeline 16.2 and the second double-layer drill rod 15
The connection setting of road 15.6,16.2 end radial symmetric of high-pressure gas pipeline are provided with jet stream Unit injector 16.4, drill body high pressure
Low pressure abrasive material gas piping 16.1, the outlet of low pressure abrasive material gas piping 16.1 and jet pump are equipped on the outside of gas piping 16.2
One outlet channel is formed between nozzle 16.4, exit passageway root forms the suction chamber 16.3 of a rectangle, exit passageway side
Wall forms horn-like exit passageway by the throat being arranged, and the most narrow place of exit passageway is mixing tube 16.5, outside mixing tube 16.5
Side is diffuser 16.6,15 right end low pressure abrasive material gas circuit 15.5 of the low pressure abrasive material gas piping 16.1 and the second double-layer drill rod
It is connected.
A kind of slotting process using rear mixing high-pressure abrasive material gas jet coal seam cutting release permeability improvement device, including it is following
Step:
(1) drill hole of drilling machine is used, design hole depths is drilled into and stops boring, move back and be drilled at required slot position；
(2) screw air compressor and storage cylinder are opened, the first, second, third pressure reducing valve is adjusted, close the 4th pressure reducing valve and
Abrasive material flow control valve utilizes high pressure gas detergent line, double-layer drill rod and drill bit；
(3) abrasive material is added in abrasive can in advance, adjusting first and second pressure reducing valve makes two pipelines form high and low pressure gas, adjusts
Section third, the 4th pressure reducing valve, which make two pressure of low pressure gas circuit be greater than air pressure in the control abrasive can of low pressure gas circuit one, is added abrasive material smoothly
Gas circuit, further adjust abrasive material flow control valve control gas circuit in abrasive material mass flow (in high-pressure gas circuit pressure 4MPa, low pressure gas
When the 0.3MPa of road abrasive material mass flow be 10g/s when the best slot depth of device using effect up to 1m), low pressure abrasive material gas and
High pressure gas Mixed drilling bit after double-layer drill rod is delivered to carries out erosion to coal seam after nozzle sprays, with drill bit in drilling
Rotation forms high compression ring shape abradant jet to incising coal seam (during slot, it should be noted that gently press slow-speed), observes drilling orifice and goes out
Coal situation is until aperture continues to carry out slot operation at next position after gushing out without slack coal, after the slot for completing the drilling coal section
Close all pressure reducing valves and screw air compressor；
(4) operating procedure in (2) is repeated after the completion of use to move back using high pressure gas detergent line, double-layer drill rod, rear Mixed drilling bit
It bores and repeats the slot operation that step (3) carry out next hole.
When specifically used, gas-particle two-phase rotation is accessed through pipeline by abrasive material flow control valve through mixed low pressure abrasive material gas
Turn the sand supplying pipeline 13.2 in conveyer 13, high-pressure gas circuit enters gas-particle two-phase by supply air line 13.1 and rotates conveyer, gas
Gu the high pressure gas and low pressure abrasive material gas in two-phase rotation conveyer are defeated respectively after rotating seal component 13.4 and drilling machine 14
It send into the high-pressure gas circuit 15.6 of double-layer drill rod 15 and low pressure abrasive material gas circuit 15.5, passes through high-pressure gas circuit in the second double-layer drill rod
15.6 and low pressure abrasive material gas circuit 15.5 realize that the layering transport of high pressure gas and low pressure abrasive material gas reduces the abrasion to drilling rod
The pressure drop for consuming and reducing high-pressure gas circuit reduces it along journey energy loss, be equipped in bar drilling rod ring baffle 15.4 its
On be provided with low pressure abrasive air Reuter stomata 15.41 guarantee abrasive material normal transport.Interior bar, outer bar between double-layer drill rod are all made of fastly
Quick coupling connection is provided in annular groove 15.3 on interior bar pin end 15.2 and sets sealing ring and guarantee that itself and interior bar female connector 15.8 connect
The air-tightness connect passes through low pressure abrasive material gas piping 16.1, high-pressure gas pipeline 16.2, low pressure mill in the second double-layer drill rod end
Material gas and high pressure gas enter drill bit, and high pressure gas forms negative pressure after the ejection of jet stream Unit injector 16.4, and outer layer drilling rod is low
The negative pressure of abrasive material gas and high-pressure gas jet is pressed to generate larger pressure difference, to drive abrasive material to enter suction chamber 16.3, through mixing
Pipe 16.5 is crushed coal body along the ejection of diffuser 16.6 after being sufficiently mixed, and the pressure that the present apparatus provides air compressor is led to
It crosses pressure reducing valve and is divided into biggish two gas circuits of pressure difference, and rotate conveyer for low pressure abrasive material gas and high pressure using gas-particle two-phase
Gas is delivered in the double-layer drill rod in the present invention simultaneously, and finally mixing generation is good after bit head is carried out using jet pump technology
Good slot effect.
Claims (9)
1. mixing high-pressure abrasive material gas jet coal seam cutting pressure relief device after a kind of, it is characterised in that: including gas generating assembly,
The feeding abrasive material component being connected with gas generating assembly outlet side, with gas generating assembly and the same phase of feeding abrasive material module outlet
Gas-particle two-phase rotation conveyer even, the gas-particle two-phase rotation conveyer outlet are equipped with the first double-layer drill rod, the first double-deck brill
Bar outlet is equipped with drilling machine, and the drilling machine outlet is additionally provided with the second double-layer drill rod, and the second double-layer drill rod end is equipped with and cuts for coal seam
The rear Mixed drilling bit of seam.
2. mixing high-pressure abrasive material gas jet coal seam cutting pressure relief device after as described in claim 1, it is characterised in that: described
Gas generating assembly includes screw air compressor, the air accumulator being connected with screw air compressor by pipeline, screw rod
Pressure gauge is additionally provided on pipeline between formula air compressor and air accumulator, the import and export at air accumulator both ends is equipped with needle-valve,
Pipeline is divided into low pressure air delivering pipeline and high pressure gas pipeline road by threeway by reservoir outlet, and the high pressure gas pipeline road is equipped with
First pressure reducing valve, low pressure air delivering pipeline are equipped with the second pressure reducing valve, and the low pressure air delivering pipeline is connected with feeding abrasive material component, institute
High pressure gas pipeline road is stated to be connected with gas-particle two-phase rotation conveyer.
3. mixing high-pressure abrasive material gas jet coal seam cutting pressure relief device after as claimed in claim 2, it is characterised in that: described
Feeding abrasive material component includes the low pressure gas circuit one, low pressure gas circuit two and abrasive being connected with low pressure air delivering pipeline, the low pressure gas
Road one and low pressure gas circuit second is that distinguish connection by threeway by low pressure air delivering pipeline, be additionally provided on the abrasive can abrasive material into
Mouthful, abrasive material pot bottom is equipped with abrasive material flow control valve, and the low pressure gas circuit one passes through threeway and abrasive material flow control valve lower end
Abrasive material outlet conduit is connected, and low pressure gas circuit two is connected with abrasive can inlet ductwork, and abrasive material outlet conduit rotates defeated with gas-particle two-phase
Device is sent to be connected, the low pressure gas circuit one is equipped with third pressure reducing valve, and low pressure gas circuit two is equipped with the 4th pressure reducing valve.
4. mixing high-pressure abrasive material gas jet coal seam cutting pressure relief device after as claimed in claim 3, it is characterised in that: described
It includes shell that gas-particle two-phase, which rotates conveyer, and the supply air line and sand supplying pipeline that are connected with shell, the supply air line and
High pressure gas pipeline road is connected, and the sand supplying pipeline is connected with abrasive material export pipeline, is additionally provided with rotatory sealing in the shell
Component, the rotating seal component inside are equipped with the channel being respectively communicated with supply air line and sand supplying pipeline, rotating seal component
Outlet is equipped with first double-layer drill rod being connected with its internal pipeline, leads between the first double-layer drill rod and the second double-layer drill rod
A drilling machine is crossed to be connected.
5. mixing high-pressure abrasive material gas jet coal seam cutting pressure relief device after as claimed in claim 4, it is characterised in that: described
First double-layer drill rod and the second double-layer drill rod include outer bar and interior bar, and it is low between interior bar and outer bar that interior bar, which is high-pressure gas circuit,
Abrasive material gas circuit is pressed, described outer bar one end is equipped with outer bar female connector, and the outer bar other end is equipped with outer bar pin end, close in the interior bar
Outer bar female connector one end is equipped with interior bar pin end, and close outer bar pin end one end is equipped with interior bar female connector, the interior bar in interior bar
It is upper that annular groove is equipped on the right side of interior bar pin end, drilling rod baffle is additionally provided between the interior bar and outer bar.
6. mixing high-pressure abrasive material gas jet coal seam cutting pressure relief device after as claimed in claim 5, it is characterised in that: described
Drilling rod baffle is circle, and drilling rod baffle center is equipped with high-pressure gas circuit air hole, and drilling rod baffle circumference is equipped with multiple low pressure abrasive airs
Reuter's stomata.
7. mixing high-pressure abrasive material gas jet coal seam cutting pressure relief device after as claimed in claim 6, it is characterised in that: described
Mixed drilling bit includes drill body afterwards, and the cutting teeth on the right side of drill body, drill body Left-side center is axially arranged with high pressure
Gas piping, the high-pressure gas pipeline are connected to setting, high-pressure gas pipeline end diameter with the high-pressure gas circuit of the second double-layer drill rod
To jet stream Unit injector is symmetrically arranged with, low pressure abrasive material gas piping, the low pressure are equipped on the outside of drill body high-pressure gas pipeline
One outlet channel is formed between abrasive material gas tube outlet and jet stream Unit injector, exit passageway root forms the suction of a rectangle
It enters the room, exit passageway side wall forms horn-like exit passageway by the throat being arranged, and the most narrow place of exit passageway is mixing tube, mixes
Closing is diffuser on the outside of pipe, and the low pressure abrasive material gas piping is connected with the second double-layer drill rod right end low pressure abrasive material gas circuit.
8. utilizing the rear mixing high-pressure abrasive material gas jet coal seam cutting release permeability improvement device slot as claimed in claim 1 to 7
Method, which comprises the following steps:
(1) drill hole of drilling machine is used, design hole depths is drilled into and stops boring, move back and be drilled at required slot position；
(2) screw air compressor and storage cylinder are opened, the first, second, third pressure reducing valve is adjusted, close the 4th pressure reducing valve and
Abrasive material flow control valve utilizes high pressure gas detergent line, double-layer drill rod and drill bit.
(3) abrasive material is added in abrasive can in advance, adjusting first and second pressure reducing valve makes two pipelines form high and low pressure gas, adjusts
Section third, the 4th pressure reducing valve, which make two pressure of low pressure gas circuit be greater than air pressure in the control abrasive can of low pressure gas circuit one, is added abrasive material smoothly
Gas circuit further adjusts abrasive material mass flow in abrasive material flow control valve control gas circuit, low pressure abrasive material gas and high pressure gas warp
Double-layer drill rod is delivered to rear Mixed drilling bit and carries out erosion to coal seam after nozzle sprays, as bit forms height in drilling
Pressure ring shape abradant jet observes drilling orifice and produces coal situation until next position is continued after gushing out without slack coal in aperture to incising coal seam
It sets place and carries out slot operation, close all pressure reducing valves and screw air compressor after completing the slot of the drilling coal section；
(4) operating procedure in (2) is repeated after the completion of use to move back using high pressure gas detergent line, double-layer drill rod, rear Mixed drilling bit
It bores and repeats the slot operation that step (3) carry out next hole.
9. utilizing rear mixing high-pressure abrasive material gas jet coal seam cutting release permeability improvement device slot side as claimed in claim 8
Method, it is characterised in that: step (2) the mesohigh airline pressure is 4MPa, abrasive material mass flow when low pressure gas circuit is 0.3MPa
For 10g/s, slot depth is 1m, and during slot, gently to press slow-speed.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910927451.2A CN110497320A (en) | 2019-09-27 | 2019-09-27 | Mixing high-pressure abrasive material gas jet coal seam cutting pressure relief device and slotting process afterwards |
| ZA2020/02817A ZA202002817B (en) | 2019-09-27 | 2020-05-15 | Coal seam slotting and relieving device with post-mixed high-pressure abrasive gas jet and slotting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910927451.2A CN110497320A (en) | 2019-09-27 | 2019-09-27 | Mixing high-pressure abrasive material gas jet coal seam cutting pressure relief device and slotting process afterwards |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110497320A true CN110497320A (en) | 2019-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910927451.2A Pending CN110497320A (en) | 2019-09-27 | 2019-09-27 | Mixing high-pressure abrasive material gas jet coal seam cutting pressure relief device and slotting process afterwards |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110497320A (en) |
| ZA (1) | ZA202002817B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111042792A (en) * | 2020-01-13 | 2020-04-21 | 煤科集团沈阳研究院有限公司 | Deep drilling longitudinal joint cutting device and method |
| CN113931608A (en) * | 2021-10-13 | 2022-01-14 | 中煤科工集团重庆研究院有限公司 | Rear-mounted binary channels abrasive material efflux slotting device |
| CN114370272A (en) * | 2021-12-30 | 2022-04-19 | 中矿科创(北京)煤炭技术有限公司 | Directional hydraulic top cutting method and device |
| CN114370272B (en) * | 2021-12-30 | 2024-05-07 | 中矿科创(北京)煤炭技术有限公司 | Directional hydraulic roof cutting method and device thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204457849U (en) * | 2015-01-07 | 2015-07-08 | 河南理工大学 | The anti-reflection equipment of coal release is broken in high-pressure abrasive material gas jet |
| CN109441353A (en) * | 2018-12-21 | 2019-03-08 | 河南理工大学 | Device for coal and its broken coal method are broken in compound abrasive gas jet after a kind of |
| CN210790585U (en) * | 2019-09-27 | 2020-06-19 | 河南理工大学 | Rear-mixing type high-pressure abrasive gas jet coal seam slotting pressure relief device |
-
2019
- 2019-09-27 CN CN201910927451.2A patent/CN110497320A/en active Pending
-
2020
- 2020-05-15 ZA ZA2020/02817A patent/ZA202002817B/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204457849U (en) * | 2015-01-07 | 2015-07-08 | 河南理工大学 | The anti-reflection equipment of coal release is broken in high-pressure abrasive material gas jet |
| CN109441353A (en) * | 2018-12-21 | 2019-03-08 | 河南理工大学 | Device for coal and its broken coal method are broken in compound abrasive gas jet after a kind of |
| CN210790585U (en) * | 2019-09-27 | 2020-06-19 | 河南理工大学 | Rear-mixing type high-pressure abrasive gas jet coal seam slotting pressure relief device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111042792A (en) * | 2020-01-13 | 2020-04-21 | 煤科集团沈阳研究院有限公司 | Deep drilling longitudinal joint cutting device and method |
| CN111042792B (en) * | 2020-01-13 | 2021-01-15 | 煤科集团沈阳研究院有限公司 | Deep drilling longitudinal joint cutting device and method |
| CN113931608A (en) * | 2021-10-13 | 2022-01-14 | 中煤科工集团重庆研究院有限公司 | Rear-mounted binary channels abrasive material efflux slotting device |
| CN114370272A (en) * | 2021-12-30 | 2022-04-19 | 中矿科创(北京)煤炭技术有限公司 | Directional hydraulic top cutting method and device |
| CN114370272B (en) * | 2021-12-30 | 2024-05-07 | 中矿科创(北京)煤炭技术有限公司 | Directional hydraulic roof cutting method and device thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA202002817B (en) | 2020-12-23 |
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