CN106437521B - A kind of underground self-advancing type high-pressure abrasive material gas jet drilling prosthetic device and method - Google Patents
A kind of underground self-advancing type high-pressure abrasive material gas jet drilling prosthetic device and method Download PDFInfo
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- CN106437521B CN106437521B CN201611113553.3A CN201611113553A CN106437521B CN 106437521 B CN106437521 B CN 106437521B CN 201611113553 A CN201611113553 A CN 201611113553A CN 106437521 B CN106437521 B CN 106437521B
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- high pressure
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- gas
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
- E21B10/602—Drill bits characterised by conduits or nozzles for drilling fluids the bit being a rotary drag type bit with blades
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
- E21B10/61—Drill bits characterised by conduits or nozzles for drilling fluids characterised by the nozzle structure
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/16—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using gaseous fluids
-
- 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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/02—Fluid rotary type drives
Abstract
A kind of underground self-advancing type high-pressure abrasive material gas jet drilling prosthetic device and method, described device include high pressure gas portion, drill bit and hose；Drill bit includes shell, air inlet, driving nozzle, mixing chamber, rotary body and preposition nozzle, and a rotating body is provided with rotating drum, and high pressure gas portion is connected to air inlet by hose；Shell head end is additionally provided with postposition nozzle；Housing sidewall is provided through suction passage；Impeller is provided in rotating drum；The described method includes: 1) prepare high pressure gas；2) high pressure gas enters the air inlet of drill bit；3) high pressure gas is sprayed from driving nozzle；4) high pressure gas and coal dust act on impeller；5) high pressure gas drive coal dust from impeller come out after from preposition nozzle spray；6) operation is completed.Device and method of the present invention realizes the repair of collapse hole, plug-hole, can obtain higher broken coal impact force, is conducive to the reparation of drilling, improves the service efficiency of drilling.
Description
Technical field
The invention belongs to coal mine gas drainage drilling recovery technique fields, and in particular to a kind of underground self-advancing type high pressure mill
Expect gas jet drilling prosthetic device and method.
Background technique
In recent years, with the increase of pit mining depth, gas drainage condition tends to be complicated, such as in high-ground stress, country rock
When carrying out gas drainage in cranny development area and weak seam, by crustal stress and outer force-disturbance, often occur in drilling collapse hole,
Phenomena such as plug-hole, leads to gas drainage channel blockage, greatly reduces gas extraction flow and concentration.For this problem, often
Method is to carry out redrilling according to former drilling parameter with drilling machine.This method is not only time-consuming, at high cost, but also is constructed
Condition and capacity of equipment limitation, secondary drilling actual parameter differ larger with former drilling parameter, be easy to cause string hole, increase gas
Extraction difficulty.In addition to this, cinder, landwaste in drilling are sucked out using negative pressure, this method is only applicable to the lesser coal that is scattered of particle
Bulk cinder, sillar and coal slime caused by collapse hole can not be discharged in slag.Landwaste, cinder in drilling how are removed, hole pumping and mining is restored
Ability is the premise for guaranteeing drilling high-efficiency use, the efficient extraction of gas.
Drilling recovery technique can extend boring service life, improve the quality for effective extraction that drills, have and widely answer
Use prospect.But the reparation of failure drilling always is global technical problem, related scholar for this problem carried out compared with
More researchs.The patent of Patent No. CN201420843765.7 discloses " a kind of down-hole coal bed mash gas pumping drilling prosthetic device "
And the patent of Patent No. CN201210489910.1 discloses a kind of " drilling of coal mine down-hole drilling, anti-reflection, reparation and gas
The above two patent of drive displacement integrated approach " is all based on waterpower measure reparation failure drilling.Studies have shown that especially in concordant
Waterpower measure is used in drilling, is unfavorable for the stability of drilling, and drilling will continue to the hole that collapses occur under the action of creep stress
Phenomena such as.In addition to this, the presence of water generates negative influence to desorption of mash gas and migration in coal body.Studies have shown that coal body is low
Hole, hypotonic feature, keep water-blocking effect especially prominent.For coal body under the influence of different hydraulic pressure, water energy enough enters facing for coal body
Boundary's pore scale reduces desorption of mash gas rate.And the postposition intrusion of water can make desorption of mash gas terminate time advance.For hole of bowing,
Bottom hole ponding be easy to cause coal body argillization, blocks gas drainage channel.
Summary of the invention
The present invention is intended to provide the underground self-advancing type high-pressure abrasive material gas jet drilling prosthetic device that a kind of using effect is good
And method.
In order to solve the above technical problems, the present invention provides the following technical solutions: a kind of underground self-advancing type high-pressure abrasive material
Gas jet drilling prosthetic device, including high pressure gas portion, drill bit and hose；Drill bit include shell and from shell head end extremely
Air inlet, driving nozzle, mixing chamber, rotary body and the preposition nozzle that end was set gradually be connected, a rotating body setting
There is rotating drum, high pressure gas portion is connected to air inlet by hose；Shell head end is additionally provided with the postposition spray being connected to air inlet
Mouth, the air-flow sprayed in the direction of the air-flow sprayed in postposition nozzle and preposition nozzle it is contrary；Housing sidewall, which runs through, to be set
It is equipped with the suction passage being connected to mixing chamber；It is provided with impeller in rotating drum, at least three cutting is distributed on rotary body outer wall.
Front end closing, open-ended coal dust flow guiding sleeve are arranged with outside shell, coal dust flow guiding lower cartridge is provided with coal
Slag, discharge are provided with towards the atomizer on the outside of coal dust flow guiding sleeve on cinder, discharge.
Impeller rear portion is provided with the air balance chamber along the setting of shell length direction.
The internal diameter of postposition nozzle and preposition nozzle inlet gradually becomes smaller, and the internal diameter of outlet becomes larger；Driving nozzle
Interior import without leave to outlet gradually become smaller.
High pressure gas portion includes air compressor machine and the gas cylinder with the outlet connection of air compressor machine, and the outlet of gas cylinder is connected by hose
Air inlet on drill bit.
High pressure gas portion further include capstan winch and drive capstan winch rotation power device, hose include quiet hose and with quiet hose
The dynamic hose connected by rotating seal；Dynamic hose is set around on capstan winch；The outlet of quiet hose connection gas cylinder, moves the end of hose
The air inlet of end connection drill bit.
It is installed with hose locating ring in front of drill bit, dynamic hose is arranged in hose locating ring.
A kind of underground self-advancing type high-pressure abrasive material gas jet drilling restorative procedure that above-mentioned apparatus carries out, successively includes as follows
Step:
1) high pressure gas is prepared, the pressure for the high pressure gas prepared is 5 ~ 25Mpa；
2) high pressure gas enters the air inlet of drill bit, and a part of high pressure gas is sprayed from drill bit by postposition nozzle；Separately
Outer a part of high pressure gas enters driving nozzle；
3) high pressure gas is sprayed from driving nozzle, and coal dust is drawn into mixing chamber under high pressure gas drainage by suction passage
In, the flow of the coal dust sucked in suction passage is 0.01~0.02kg/s；
4) impeller rotates under high pressure gas and coal dust effect, and impeller drives rotary body and cutting rotation；
5) it is sprayed after high pressure gas drives coal dust to pass through impeller from preposition nozzle；
6) operation is completed, and stops the preparation of high pressure gas, and drill bit resets.
Path of the step 2 mesohigh gas in postposition nozzle first gradually becomes smaller, after become larger；Step 2 mesohigh
Path of the gas in driving nozzle gradually becomes smaller；The path of step 5) mesohigh gas and coal dust in preposition nozzle is first gradually
Become smaller, after become larger.
The mixed airflow of step 5) mesohigh gas and coal dust is entered after impeller by linear air balance chamber
Preposition nozzle.
By above technical scheme, the invention has the benefit that the 1, apparatus structure is simple, setting rationally, can
With the efficient reparation for completing failure drilling；It can continuously suck coal dust, ensure that the continuous addition of abrasive material, realize abrasive material gas
Jet stream can complete the broken of slump coal cinder so that broken coal ability is stronger；Drill bit may be implemented voluntarily in the postposition nozzle of setting
Into；And the crushing of coal cinder may be implemented in cutting, and then improves the repairing effect of drilling.2, coal dust flow guiding set is arranged with outside shell
Cylinder, the discharge of coal dust cinder is realized by coal dust flow guiding sleeve；The atomizer of setting can avoid coal dust by atomized water
It arbitrarily drifts, improves working environment.3, impeller rear portion is provided with the air balance chamber along the setting of shell length direction, so that
The air-flow for flowing through impeller tends towards stability.4, the internal diameter of postposition nozzle and preposition nozzle inlet gradually becomes smaller, and the internal diameter of outlet is equal
It becomes larger；Interior import without leave to the outlet of driving nozzle gradually becomes smaller；And then improve the speed for the air-flow that postposition nozzle sprays；
Preposition nozzle and driving nozzle interaction, improve the speed of the air-flow sprayed from preposition nozzle, and then high pressure gas and coal dust
The function and effect of mixture.5, high pressure gas portion further includes capstan winch and the power device for driving capstan winch rotation, and hose includes quiet soft
Pipe and the dynamic hose that is connect with quiet hose by rotating seal, so as to avoid influence of the traveling to hose of drill bit.6, it bores
Head front is installed with hose locating ring, and dynamic hose is arranged in hose locating ring, and the outlet and drilling for guaranteeing hose are in same water
Horizontal line.7, method of the present invention realizes the continuous sucking of coal dust, ensure that the continuous addition of abrasive material, realizes abrasive material gas
Jet stream efficiently completes the repair of drilling, improves drilling repair effect.8, step 5) mesohigh gas and coal dust is mixed
It closes air-flow and preposition nozzle is entered by linear air balance chamber after impeller, make to tend to be steady by the abrasive material gas of impeller
It is fixed, to improve the function and effect for the air-flow that preposition nozzle sprays.9, the flow of the coal dust sucked in suction passage in step 3)
For 0.01~0.02kg/s when implementing, when pulverized coal flow is excessively high, acceleration of the nozzle to coal dust is influenced, erosion is imitated
Fruit is poor；When pulverized coal flow is lower, coal dust can sufficiently accelerate, but integral energy is lower, influence brokenly coal effect；Hose mesohigh
Gas pressure is 5~20Mpa, to guarantee repairing effect while guaranteeing pressure.
Detailed description of the invention
Fig. 1 is apparatus structure schematic diagram of the present invention；
Fig. 2 is drill bit structure schematic diagram；
Fig. 3 is the method for the invention flow chart.
Specific embodiment
A kind of underground self-advancing type high-pressure abrasive material gas jet drilling prosthetic device, as shown in Figure 1, include high pressure gas portion,
High pressure gas portion is for generating high pressure gas.
Wherein, it includes air compressor machine 1 and at least one gas cylinder 3, gas cylinder in the present embodiment that high pressure gas portion, which includes high pressure gas portion,
3 quantity is 3.The outlet of air compressor machine 1 connects the entrance of each gas cylinder 3, so that the gas in air compressor machine enters gas
In bottle.For the ease of the control of gas, valve 2 is provided on the entrance and exit of gas cylinder 3, by the unlatching of valve 2 or
Close the control process for facilitating gas transport.Meanwhile hose is connected in the outlet of gas cylinder 3, pressure gauge is provided on hose
4, the pressure of the gas in hose can be learnt by pressure gauge 4, it, can be in time to entire work by the monitoring to gas parameter
It is adjusted as process, guarantees its efficient working condition.
Hose includes quiet hose 31, and quiet hose 31 is connect with the gas outlet of gas cylinder 3.The end of quiet hose 31 be connected with move it is soft
Pipe 32, is connected with rotating seal 6 between quiet hose 31 and dynamic hose 32, and rotating seal 6 realizes dynamic hose and quiet soft
The connection of pipe, for the mature prior art.
Dynamic hose 32 is wound around on capstan winch 5, power device 7 is sequentially connected on capstan winch 5, power device 7 realizes strand
The rotation of disk, to realize the folding and unfolding of dynamic hose 32.When implementing, power device can select hydraulic motor.
5 rear of capstan winch is provided with bracket 12, hose locating ring 8 is installed at the top of bracket 12, dynamic hose 32 is arranged in soft
In pipe locating ring 8, to realize the positioning to dynamic hose by hose locating ring 8, guarantee the direction of travel of drill bit.
The rear of hose locating ring 8 is provided with drill bit 11, drill bit 11 is as shown in Fig. 2, include shell 14, in shell 14
Front end is provided with air inlet 15, the center line of air inlet 15 be overlapped with the center line on shell length direction air inlet 15 with move it is soft
The end of pipe 32 connects, so that the high pressure gas that dynamic hose 32 comes out can be entered in shell 14 by air inlet 15.
15 rear portion of air inlet is provided with air-inlet cavity 20, the high pressure gas entered from air inlet 15 can enter air-inlet cavity
In 20.There are 3 paths that can high pressure gas be passed through on the end of air-inlet cavity 20.3 paths of 20 end of air-inlet cavity,
In two connection air-out chambers 19, the airflow direction in air-out chamber 19 is opposite with the airflow direction in air-inlet cavity 20.Two air-out chambers
19 are symmetrical arranged relative to air-inlet cavity 20, to guarantee air balance.
It is connected between air-inlet cavity 20 and air-out chamber 19 by arc transiting surface 21, to guarantee the stability of air-flow.Two
The end of a air-out chamber 19 is connected separately with postposition nozzle 16, and two postposition nozzles 16 are symmetrical arranged relative to air inlet 15, after
The contrary of the air-flow sprayed in the direction and preposition nozzle of the air-flow sprayed in nozzle is set, to spray by gas from postposition
It is sprayed in mouth, brings power to the traveling of shell 14.In addition, postposition nozzle 16 is fixed on shell 14 by end cap 17, simultaneously
Sealing ring 18 is provided between shell 14 and postposition nozzle 16, thus by sealing ring 18 guarantee postposition nozzle and shell 14 it
Between sealing.
Wherein, the internal diameter of postposition nozzle and preposition nozzle inlet gradually becomes smaller, and the internal diameter of outlet becomes larger, thus
Air-flow is accelerated, the function and effect of air-flow are improved.
In 3 paths of 20 end of air-inlet cavity, remaining connection driving nozzle 22, driving nozzle 22 is also by sealing
Circle 18 is realized with shell 14 and is tightly connected.Wherein, interior import without leave to the outlet of driving nozzle 22 gradually becomes smaller, and guarantees gas stream
Fair speed can be obtained through this driving nozzle, generates negative pressure, coal dust is made to enter mixing chamber by suction passage to increase air-flow
Pressure improves air velocity.Meanwhile the driving nozzle can be matched with preposition nozzle, guarantee the mixed of coal dust and high pressure gas
Supersonic speed can be obtained through preposition nozzle by closing air-flow, and abrasive material is made to accelerate to higher speed, obtain biggish broken coal impact force, in turn
Coal cinder in device to hole is crushed.
The rear portion of driving nozzle 22 is provided with mixing chamber 26, is provided through suction passage on the side wall of mixing chamber 26
24, suction passage 24 is arranged radially along shell 14.The end of suction passage 24 is provided with sieve 25, it can be right by sieve
The coal dust being drawn into mixing chamber 26 is filtered, and big coal cinder is prevented to be also drawn into mixing chamber 26.
The end of mixing chamber 26 is provided with rotary body 27, rotary body 27 is connect by bearing 31 with shell 1, to guarantee
Stability in 27 rotation process of rotary body.It is wherein provided with rotating drum 28 in rotary body 27, is provided with impeller in rotating drum 28
29, cutting 30 is provided on 27 outer wall of rotary body, cutting 30 can be crushed the coal cinder in drilling, guarantee borehole cleaning effect.Wherein, it cuts
The quantity of tooth 30 is at least 3, and the quantity of cutting is selected as 3 in the present embodiment, and cutting shape is top in the rectangular of bladed
Body.
The air balance chamber 23 along the setting of shell length direction, the air balance chamber of setting are connected at the rear portion of impeller 29
23 can make to tend towards stability by the mixed airflow of impeller, improve the function and effect of mixed airflow.
The end of air balance chamber 23 is provided with preposition nozzle 32, preposition nozzle 32 is the same with postposition nozzle, also by
End cap is connect with shell, while the sealing of both sealing ring realizations junction being arranged between preposition nozzle and shell.
In addition, being arranged with coal dust flow guiding sleeve 10, coal dust flow guiding set outside the shell of drill bit 11 to improve function and effect
Cylinder for realizing cinder, coal dust discharge.The lower part of coal dust flow guiding sleeve is provided with cinder, discharge 13, in drilling
Cinder, coal dust are discharged by cinder, discharge 13.It is provided on cinder, discharge 13 towards coal dust flow guiding sleeve 10
The atomizer 9 in outside, atomizer 9 connects water source when in use, so that atomized water is formed at discharge 13, into
And make the spray for dust suppression of coal dust, cinder, improve working environment.
In the present embodiment, connect because preposition nozzle and postposition nozzle pass through end cap with shell, thus preposition nozzle and
Postposition nozzle is all replaceable, and user can select the nozzle of different model according to different operating condition, to obtain different push away
Power and broken coal impact force.
When work, high pressure gas enters air inlet by hose, and a part of high pressure gas is sprayed by postposition nozzle
Out, power is provided to the traveling of shell；Another part high pressure gas is sprayed by driving nozzle, so that coal dust is logical from sucking
Road is drawn into mixing chamber, while suction passage continuously sucks coal dust, ensure that the continuous addition of abrasive material, realizes that abrasive material gas is penetrated
Stream can complete the broken of slump coal cinder so that broken coal ability is stronger；；The mixed airflow of high pressure gas and coal dust passes through impeller
It is sprayed afterwards from preposition nozzle；Mixed airflow will drive rotary body rotation after impeller, so that cutting can be crushed drilling
Interior coal cinder completes drilling repair.
Present apparatus structure is simple, realizes the repair of collapse hole, plug-hole, is simple and efficient, and passes through replacement postposition or preceding
Set nozzle, different thrust and broken coal impact force may be implemented, make it is suitable under different condition failure drilling reparation；It keeps away
The shortcomings that exempting from secondary drilling and waterpower measure reparation drilling, and higher broken coal impact force can be obtained, be conducive to drill
Reparation, improve the service efficiency of drilling.
A kind of underground self-advancing type high-pressure abrasive material gas jet drilling restorative procedure carried out using above-mentioned apparatus, such as Fig. 3 institute
Show, in turn include the following steps:
1) high pressure gas is prepared；The high pressure gas prepared will guarantee that the pressure entered in hose is 5 ~ 25Mpa, thus
Improve the function and effect of high pressure gas.
Method are as follows: the high pressure gas come out from air compressor machine enters in gas cylinder, and air compressor machine realizes the supply of high pressure gas,
And gas cylinder realizes the stability of high pressure gas, improves the function and effect of high pressure gas.
2) high pressure gas enters the air inlet of drill bit, and a part of high pressure gas is sprayed from drill bit by postposition nozzle；Separately
Outer a part of high pressure gas enters driving nozzle；
High pressure gas enters by hose the air inlet of drill bit after coming out from gas cylinder, enter in the air inlet of drill bit
Air-inlet cavity；A part of high pressure gas enters air-out chamber by air-inlet cavity, is sprayed by postposition nozzle, and high pressure gas is sprayed in postposition
Path in mouth are as follows: first gradually become smaller, after become larger, to improve air velocity.The air-flow sprayed from postposition nozzle is to brill
The traveling of head brings power；Another part high pressure gas enters in driving nozzle, road of the high pressure gas in driving nozzle
Diameter gradually becomes smaller, to improve the speed of high pressure gas, negative pressure is formed after driving nozzle, ensure that the suction process of coal dust.
Wherein, hose mesohigh gas pressure is 5~20Mpa, can be with when for bow hole or drilling, resistance is smaller and weak seam
Smaller pressure is chosen, range is 5 ~ 15Mpa, and low energy consumption, can also repair gas failure drilling；For lateral aperture or on to
Drilling and coal seam are harder, can select elevated pressures, and range is 15 ~ 20Mpa, and the coal cinder that can be effectively crushed in drilling reaches
To drilling repairing effect.
3) high pressure gas is sprayed from driving nozzle, and coal dust is drawn into mixing chamber under high pressure gas drainage by suction passage
In；During high pressure gas is sprayed from driving nozzle, negative pressure can be formed after driving nozzle, and mixing chamber is located at driving nozzle
Rear portion, therefore, coal dust can enter in the suction passage being connected to mixing chamber, finally enter in mixing chamber from suction passage, coal
Powder is mixed to form mixed airflow with high pressure gas in mixing chamber.Wherein, the flow of the coal dust sucked in suction passage is 0.01
~0.02kg/s, preferably 0.015 kg/s.When pulverized coal mass flow is excessively high, acceleration of the nozzle to coal dust is influenced, erosion is made
Effect is poor；When pulverized coal mass flow is lower, coal dust can sufficiently accelerate, but integral energy is lower, influence brokenly coal effect.
4) impeller rotates under the action of the mixed airflow that high pressure gas and coal dust are formed, and impeller drives rotary body and cutting
Rotation；
Under the action of the mixed airflow that high pressure gas and coal dust are formed, impeller rotates, rotary body and impeller synchronous rotary,
Cutting on rotary body outer wall is crushed coal cinder, to improve repairing effect.
5) high pressure gas drive coal dust from impeller come out after from preposition nozzle spray；
Firstly, impeller drives rotary body rotation, cutting is crushed the coal cinder in drilling；
Then, the mixed airflow that high pressure gas and coal dust are formed passes through air balance chamber, and air balance chamber makes air-flow become
In stabilization；
Finally, being sprayed by the high pressure gas of air balance chamber and the mixed airflow of coal dust by preposition nozzle, mesohigh
The path of gas and coal dust in preposition nozzle first gradually becomes smaller, after become larger, so that preposition nozzle and driving nozzle match
It closes, improves the speed of air-flow.
Drilling can be repaired after the ejection of preposition nozzle in the mixed airflow of high pressure gas and coal dust；Then, it is rushed
The mixed airflow hit back can enter coal dust flow guiding sleeve, come out from cinder, the discharge of coal dust flow guiding sleeve；Mist after out
Change nozzle to be atomized coal dust, cinder.
6) operation is completed, and stops the preparation of high pressure gas, and drill bit resets.
Firstly, closing air compressor machine, drill bit, disassembly & recycling device are taken out in power device reversion.
Method of the present invention realizes the repair of collapse hole, plug-hole, is simple and efficient, can to avoid secondary drilling with
The shortcomings that waterpower measure reparation drills, and higher broken coal impact force can be obtained, be conducive to the reparation of drilling, improve and bore
The service efficiency in hole.
Claims (8)
- The prosthetic device 1. a kind of underground self-advancing type high-pressure abrasive material gas jet drills, it is characterised in that: including high pressure gas portion, bore Head and hose；Drill bit include shell and the air inlet being connected set gradually from shell head end to end, driving nozzle, Mixing chamber, rotary body and preposition nozzle, a rotating body are provided with rotating drum, high pressure gas portion and air inlet and are connected by hose It is logical；Shell head end is additionally provided with the postposition nozzle being connected to air inlet, and the internal diameter of postposition nozzle and preposition nozzle inlet is gradually Become smaller, the internal diameter of outlet becomes larger；Interior import without leave to the outlet of driving nozzle gradually becomes smaller；It is sprayed in postposition nozzle The air-flow sprayed in the direction of air-flow and preposition nozzle it is contrary；Housing sidewall is provided through the suction being connected to mixing chamber Enter channel；It is provided with impeller in rotating drum, at least three cutting is distributed on rotary body outer wall;Impeller rear portion is provided with along shell The air balance chamber of length direction setting.
- The prosthetic device 2. self-advancing type high-pressure abrasive material gas jet in underground as described in claim 1 drills, it is characterised in that: shell It is arranged with front end closing, open-ended coal dust flow guiding sleeve outside, coal dust flow guiding lower cartridge is provided with cinder, discharge, It is provided on cinder, discharge towards the atomizer on the outside of coal dust flow guiding sleeve.
- The prosthetic device 3. self-advancing type high-pressure abrasive material gas jet in underground as claimed in claim 2 drills, it is characterised in that: high pressure Gas portion includes air compressor machine and the gas cylinder with the outlet connection of air compressor machine, and the outlet of gas cylinder connects the air inlet on drill bit by hose Mouthful.
- The prosthetic device 4. self-advancing type high-pressure abrasive material gas jet in underground as claimed in claim 3 drills, it is characterised in that: high pressure Gas portion further includes capstan winch and the power device for driving capstan winch rotation, and hose includes quiet hose and passes through rotatory sealing with quiet hose The dynamic hose of device connection；Dynamic hose is set around on capstan winch；The end connection drill bit of hose is moved in the outlet of quiet hose connection gas cylinder Air inlet.
- The prosthetic device 5. self-advancing type high-pressure abrasive material gas jet in underground as claimed in claim 4 drills, it is characterised in that: drill bit Front is installed with hose locating ring, and dynamic hose is arranged in hose locating ring.
- The reparation side 6. a kind of underground self-advancing type high-pressure abrasive material gas jet carried out using device described in claim 1 is drilled Method, it is characterised in that: in turn include the following steps:1) high pressure gas, is prepared, the pressure for the high pressure gas prepared is 5 ~ 25Mpa；2), high pressure gas enters the air inlet of drill bit, and a part of high pressure gas is sprayed from drill bit by postposition nozzle；Other one Partial high pressure gas enters driving nozzle；3), high pressure gas is sprayed from driving nozzle, and coal dust is drawn into mixing chamber by suction passage under high pressure gas drainage, is inhaled The flow for entering the coal dust sucked in channel is 0.01~0.02kg/s；4), impeller rotates under high pressure gas and coal dust effect, and impeller drives rotary body and cutting rotation；5) it is sprayed after, high pressure gas drives coal dust to pass through impeller from preposition nozzle；6), operation is completed, and stops the preparation of high pressure gas, and drill bit resets.
- The restorative procedure 7. self-advancing type high-pressure abrasive material gas jet in underground as claimed in claim 6 drills, it is characterised in that: step 2) path of the mesohigh gas in postposition nozzle first gradually becomes smaller, after become larger；Step 2 mesohigh gas is in ejection Path in mouth gradually becomes smaller；The path of step 5) mesohigh gas and coal dust in preposition nozzle first gradually becomes smaller, after gradually Become larger.
- The restorative procedure 8. self-advancing type high-pressure abrasive material gas jet in underground as claimed in claim 7 drills, it is characterised in that: step 5) mixed airflow of mesohigh gas and coal dust enters preposition nozzle by linear air balance chamber after impeller.
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