CN107023295A - A kind of hard coal erosion control destressing borehole construction method and equipment - Google Patents
A kind of hard coal erosion control destressing borehole construction method and equipment Download PDFInfo
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- CN107023295A CN107023295A CN201710245236.5A CN201710245236A CN107023295A CN 107023295 A CN107023295 A CN 107023295A CN 201710245236 A CN201710245236 A CN 201710245236A CN 107023295 A CN107023295 A CN 107023295A
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- 239000003245 coal Substances 0.000 title claims abstract description 144
- 230000003628 erosive effect Effects 0.000 title claims abstract description 52
- 238000010276 construction Methods 0.000 title claims abstract description 35
- 238000005553 drilling Methods 0.000 claims abstract description 114
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000005516 engineering process Methods 0.000 claims abstract description 34
- 239000002817 coal dust Substances 0.000 claims abstract description 14
- 238000004080 punching Methods 0.000 claims abstract description 12
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 16
- 239000011159 matrix material Substances 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 239000011435 rock Substances 0.000 abstract description 31
- 238000007710 freezing Methods 0.000 abstract description 11
- 230000008014 freezing Effects 0.000 abstract description 11
- 239000000843 powder Substances 0.000 abstract description 9
- 238000001816 cooling Methods 0.000 abstract description 8
- 238000000151 deposition Methods 0.000 abstract description 8
- 239000000428 dust Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 20
- 230000000694 effects Effects 0.000 description 16
- 238000005065 mining Methods 0.000 description 7
- 230000009467 reduction Effects 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000010534 mechanism of action Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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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Abstract
The invention discloses a kind of hard coal erosion control destressing borehole construction method and equipment, the coal seam erosion control drilling drilling technology crept into using machinery drilling and hydraulic jet, coal breakage body is rushed first with high-pressure water jet and forms borehole profile, drill bit is recycled to crush the coal body that punching falls, then coal dust is taken out of using water under high pressure backflow, so as to form " waterpower falls rock, mechanical rock breaking, backflow band rock " three-level drilling drilling technology, play a part of drilling, pore-forming, depositing dust, row's powder, cooling." first rush and break afterwards " drilling technology changes mechanical drill mode, remains Mechanical Crushing characteristic, improves drilling drilling efficiency, has merged waterpower erosion control characteristic, so as to effectively solve the problems such as poorly efficient drilling of coal seam erosion control drilling, bit freezing lose bar, accumulated powder poly- dirt.
Description
Technical field
The present invention relates to coal mine rock burst Prevention Technique field, more particularly to a kind of hard coal erosion control destressing borehole construction
Method and apparatus.
Background technology
Bump is one of dynamic disaster the most serious that China's coal-mine faces.With superficial part coal resource reserve by
Decrescence few, mining depth constantly increases, according to statistics, and the coal resources reserves that China's buried depth exceedes km account for coal resources total amount
53%, the colliery of super km exploitation is more than 45 at present, and maximum mining depth is close to 1500 meters；Easily adopt coal resources gradually
Exhaustion, yield proportion increase that complexity is exploited, difficulty cuts coal.With the increase of coal mining intensity and Circumstances of Coal Mining
Deteriorate, rock blast hazard is on the rise, whole nation bump mine is more than 160 at present.China's coal-mine exploits geology bar
Part is complicated, and induced factors of pressure bump is more, and effective difficulty of prevention and cure is big, seriously constrains mine safety and efficiently produces.Therefore, deeply
Research colliery Controlling of Coal Outburst technology has great importance.
It is believed that bump is stress problem, i.e., occurs limit stress when the stress in coal body meets bump
Bump will occur during condition.Therefore, the key of preventing and treating bump is to change stress in coal bed state, reduction coal body impact
Tendentiousness, i.e., by destroying Coal Pore Structure, weakening coal body accumulation of energy performance, reduce the possibility that impact occurs.
At present, Deep Mine rock blast hazard is extremely serious, prevents and treats arduous task.Domestic and foreign scholars have been carried out a large amount of anti-
Rush the research in terms of technology and means.The core concept of Controlling of Coal Outburst is exactly that the region of high stress is shifted to coal body deep, drop
Stress concentration area peak stress, weakens coal body Burst Tendency, reduces the accumulation of energy of area of stress concentration.This is to this problem
Propose regional and locality erosion control measure.Regional erosion control measure has exploitation protective layer, rationally developing, optimizing exploitation order,
Roadway layout, coal winning technology etc.；Locality erosion control measure has coal seam explosion, coal-bed flooding, drilling release etc..Exploit protective layer pair
Controlling of Coal Outburst can play a part of essence, but it has applicable elements, must meet condition of coal seam occurrence, and scene is main
Regional preventing and treating is carried out with optimizing exploitation order, roadway layout, coal winning technology by rationally opening up, such as away from tomography exploitation, two
The wing alternately exploitation, working face order mining, full-seam mining etc..
These erosion control technologies all have some limitations, and such as release efficiency is low, it is serious to lose drilling rod, dangerous, nothing of constructing
Method fully meets quick, the safety solution danger demand in danger of burst area.Especially hard coal, hard coal refers generally to Protodyakonov coefficient f>2.Using
The method of conventional drilling machine construction drilling, because coal body is harder, coal body breaking size is larger, and cinder excludes drilling and had some setbacks, and leads
Cause drill bit bit freezing, fall the phenomenons such as brill, drilling construction efficiency is low, the loss of drill bit, drilling rod is big.
(1) coal seam unloading pressure by blasting
Unloading pressure by blasting refers in foot of hole concentrated charge explosion, coal body continuity is destroyed, so that high stress in coal body
State is changed, and stress is shifted to country rock deep, while controlledly release is stored in the elastic energy in coal body.When quick-fried
When breaking raw, explosive is exploded in coal body, centered on demolition point, and destructiveness is gradually reduced coal body from inside to outside, its
Coverage can be divided into three regions：Crush zone, Fractured zone and vibrations area.
Relieving shot is disadvantageous in that this method is only applicable to the coal rock layer that crustal stress is big, ature of coal is hard.In addition,
A large amount of kinetic energy can be discharged during explosive charge, if design parameter is improper, release effect is not had not only, punching may be conversely induced
Press with hitting, in addition, easily causing residual big gun, blind race in implementation process, threaten site operation personal security.Therefore, this method has one
Fixed danger.
(2) coal-bed flooding
Coal-bed flooding is directed in coal seam note water under high pressure, pressure break coal body, and destroys Coal Pore Structure, is held so as to reduce coal body
Loading capability, in addition, the injection of water can reduce the physico-mechanical properties of coal body.This method have cost it is low, simple to operate, adapt to
The characteristics of property is strong.
It is not good using the method effect in hard coal seam but coal-bed flooding measure applies in general to bibulous coal seam.
(3) hydraulic fracturing, hydraulic slotted liner technique release
Hydraulic fracturing just allows for the physico-mechanical properties of coal body, using the effect of High-Pressure Water, is extruded in coal seam
Crack, and constantly extend, the coal body of crack periphery is more crushed, and then discharge the elastic energy inside coal body；The high injection of coal body
Stream brill cuts release, is that, using coal column as safety curtain, when water jet drills, coal, water are discharged by drilling to outside hole, around drilling
Coal body is acutely moved to duct direction, while occurring the dilatancy of coal body and the opposite displacement of roof and floor, is caused around drilling
A range of stress reduction, and high stress is shifted to coal body deep, so as to play a part of the local release of coal body.
Hydraulic fracturing, hydraulic slotted liner technique release technique it is slightly different, application field is also different.The type method construction technology
It is complex, there is the problem of technology and equipment is not matched, imperfection etc. is all many-sided in practical engineering application, and be difficult
Pressure break scope is controlled, uniform release is realized.
(4) slotting release
Slotting release is a kind of effective pressure relief method of deformation controlling for rock surrounding gateways, and its mechanism of action is pressure relief groove
After digging, stress in coal bed is shifted to deep, expand relief range, the elasticity in coal body is released, and absorb big
The rock deformation of amount, changes the distribution of surrounding medium stress field.
The quality of slotting release effect depends on the relief range size formed after pressure relief groove is excavated.
(5) coal bed drilling release
Using the mode of drilling, the region of high stress forms a drilling scope of freedom in coal body, makes the intensity of the region coal body weak
Change and form local weakening region or reduction band, provide compensation for the dilatancy that coal body is produced during stress release empty
Between, i.e. " coal seam, which increases, to be become " release effect, and make supporting pressure peak be shifted to country rock deep reduces high stress and roadway is broken
Bad effect.
According to " transfer of stress three-dimensionalization " principle, to being entered with the dangerous regional area of bump using large diameter borehole
Row release, causes tunnel certain depth country rock recurring structure destruction, forms a reduction band, causes in tunnel-surrounding country rock
High stress is shifted to deep, so that nearby country rock is in low stress area, when impacting, one side major diameter to tunnel-surrounding
The space of drilling can absorb the coal dust gone out, and prevent coal body from going out, and the closure of roof and floor produces " wedge in another aspect distressed zone
Shape " resistance band, can prevent coal body from going out to a certain degree.
According to the field practice and comparative analysis carried out to all kinds of unloading pressure means, as a result show, coal bed drilling can be deep enough
High stress band, release effect is good, flexibility and reliability, the release solution danger for the coal seam region of high stress that is particularly suitable for use in.But field application is simultaneously
Also indicate that, the technology still suffers from certain defect：One is, existing drilling technique does not have due release effect, this and drilling matter
Amount, drilling efficiency etc. are closely related；Two are, drilling efficiency is low, the drilling rod loss that bit freezing is caused easily occur；Three are, construction environment
In the case of undesirable, it is impossible to realize the continuous drilling of large diameter, deep borehole；In addition, during solution danger, there is peace in workmen
Full hidden danger.
Shown by a large amount of field applications, the above method improves the Burst Tendency of coal body to a certain extent, that is, passes through
Destroy Coal-body Structure, weaken the elastic potential energy of aggregation in coal and rock, reduce the possibility that impact occurs, but due to all kinds of methods
Limitation, such as release efficiency is low, effect is poor and the uneasy congruence of construction is more, and these methods is not fully met, deep-well is high to answer
The demand of power area release.Therefore, it is necessary to develop a set of efficient, safe coal seam pressure relief skill for being directed to deep impact mine
Art.The technology should meet the primary demand of live erosion control, while significantly improving the efficiency of construction of coal seam erosion control drilling, drop again
Low drilling cost, lifts level of security.
The content of the invention
The present invention provides a kind of hard coal erosion control destressing borehole construction method and equipment aiming at above-mentioned defect.
The present invention is improved to existing coal bed drilling unloading technology, proposes that a kind of combine drilling and hydraulic jet are crept into new
Coal seam erosion control drilling drilling technology, i.e., " first rush and break afterwards " coal seam erosion control drilling drilling technology.Specially rushed first with High-Pressure Water
Coal breakage body simultaneously forms borehole profile, recycles drill bit to crush the coal body that punching falls, and then takes coal dust out of using water under high pressure backflow, from
And " waterpower falls rock, mechanical rock breaking, backflow band rock " three-level drilling drilling technology is formed, play drilling, pore-forming, depositing dust, arrange powder, cold
But effect." first rush and break afterwards " drilling technology changes mechanical drill mode, remains Mechanical Crushing characteristic, improves drilling and bores
Enter efficiency, merged waterpower erosion control characteristic, gather so as to effectively solve the poorly efficient drilling of coal seam erosion control drilling, bit freezing and lose bar, accumulated powder
The problems such as dirt.
The core concept of Controlling of Coal Outburst is exactly that the region of high stress is shifted to coal body deep, reduces area of stress concentration stress
Peak value, weakens coal body Burst Tendency, reduces the accumulation of energy of area of stress concentration.
A kind of hard coal erosion control destressing borehole construction method and equipment and technology scheme of the present invention is, using machinery drilling and water
The coal seam erosion control drilling drilling technology of power jet drilling, rushes coal breakage body first with High-Pressure Water and forms borehole profile, recycle
Drill bit crushes the coal body that punching falls, and then takes coal dust out of using water under high pressure backflow.So as to be formed, " waterpower falls rock, mechanical rock breaking, returned
Stream band rock " three-level drilling drilling technology, plays a part of drilling, pore-forming, depositing dust, row's powder, cooling." first rush and break afterwards " drilling technology
Mechanical drill mode is changed, Mechanical Crushing characteristic is remained, drilling drilling efficiency is improved, waterpower erosion control characteristic has been merged,
So as to effectively solve the problems such as poorly efficient drilling of coal seam erosion control drilling, bit freezing lose bar, accumulated powder poly- dirt.
Hydraulic jet one side drill pore-forming, improves drilling efficiency, while providing cooling, lubricating effect for drilling rod operation；
On the other hand, drilling inner high voltage current are conducive to coal dust guide and depositing dust；In addition, hydraulic jet rushes coal breakage body in advance, reduce
Drilling rod confined pressure, is prevented effectively from bit freezing and loses bar；Hydraulic jet has the function of coal-bed flooding erosion control simultaneously.
Prevent in a kind of described hard coal erosion control destressing borehole construction method, the coal seam crept into using machinery drilling and hydraulic jet
Drill hole drilling technology, step is：
(1) rush coal breakage body first with High-Pressure Water and form borehole profile；
(2) rig is recycled to crush the coal body that punching falls；
(3) and then using current flushed zone coal dust is gone out.
The hard coal refers to Protodyakonov coefficient f>2.
In step (1), High-Pressure Water pressure is more than the compression strength of coal body, and no more than 30MPa.
In step (1), the bore diameter after punching is 100~150mm.
A kind of hard coal erosion control destressing borehole construction equipment that above-mentioned construction method is used, including rig, the brill being sequentially connected
Bar, drill bit and brill tooth, drill bit and brill tooth front end are provided with high pressure nozzle ejector, and drilling rod is internally provided with water inlet pipe, water inlet
Pipe one end is connected with high-pressure water pipe through rig, and the water inlet pipe other end with drill bit and bores the high pressure nozzle ejector of tooth front end respectively
Connection.
The chisel edge is provided with more than 3 and penetrated by the center of circle of bit central in the outer ring high pressure nozzle of circular distribution
Device is flowed, tooth front end is bored and is provided with more than 3 by the center of circle of bit central in the circular inner ring high pressure nozzle ejector being distributed, it is interior
The annular radii for enclosing the formation of high pressure nozzle ejector is less than the annular radii of outer ring high pressure nozzle ejector formation.
The drill bit is PDC drill bit (polycrystalline diamond compact bit).
A diameter of 100mm of drill bit.
The brill tooth includes the matrix being fixedly connected with drill bit and the wing for protruding from matrix surface, and inner ring high pressure nozzle is penetrated
Flow device be located at wing outside matrix surface, the wing helically formula distribution (spiral wing can reduce bit convolution work
With contributing to landwaste to discharge).
The brill serrated knife wing surface is provided with PDC teeth.
Beneficial effects of the present invention are：" first rush and bore afterwards " coal seam erosion control drilling drilling technology of the present invention is to be directed to high stress
Area's drilling release efficiency is low, the not good phenomenon of effect is proposed, this method combines the characteristic of drilling release and water filling release, tool
There are the multi-efficiencies such as coal dust guide, depositing dust, drilling rod cooling, reduce the generation that bit freezing loses bar phenomenon, significantly improve the region of high stress
The drilling efficiency and pore-forming effect of coal bed drilling.The present invention will prevent and treat for coal mine rock burst and provide important technological means and dress
It is standby.On the one hand, the application of the technology is remarkably improved the drilling efficiency of erosion control drilling, it is ensured that the erosion control effect in danger of burst area；
Two are, reduce region release cost；Three are, application of the invention will further lift mine safety production level.
As can be seen here, " first rush and bore afterwards " coal seam erosion control drilling drilling technology of the invention is administered applied to bump, tool
There are significant economic benefit and social benefit, and with wide market popularization value, to ensureing that rock burst coal seam safety is high
Effect exploitation has highly important meaning, to promoting deep-well safety in production major accident preventing and treating to have facilitation.
Brief description of the drawings：
Fig. 1 show hard coal erosion control destressing borehole device structure schematic diagram of the present invention；
Fig. 2 show part A enlarged drawing；
Fig. 3 show drill bit positive structure schematic；
1- high-pressure water pipes, 2- rigs, 3- drill bits, 4- drilling rods, 5- water inlet pipes, 6- drill bits, 7- outer rings high pressure nozzle ejector,
8- inner ring high pressure nozzle ejectors, 9-PDC teeth, 10- bores tooth, 11- wings, 12- matrixes.
Embodiment：
For a better understanding of the present invention, technical scheme is described in detail with instantiation below, but originally
Invention is not limited thereto.
Embodiment 1
Shandong Province Yuncheng colliery is as typical deep mine (adopting deep breakthrough 1000m), and the underground hazard that is hit threatens serious.
Over the past two years, Yuncheng field with "nine squares" was pressed and shown with occurring 6 Secondary Shocks, causes hundreds of meters of tunnel damages, larger warp is brought to bargh
Ji loss, while the also life security of serious threat personnel in the pit.
Yuncheng colliery minable coal seam is 3 coal seams, and average thickness 6.3m, unidirectional compression strength is 15MPa, tunnelling and work
Threat is pressed in the exploitation process of face with being hit.Yuncheng colliery is constructed using frame column type pressure-relief drill rig originally, three artificial one
Individual class, in next class's 3 destressing boreholes of construction of the normal condition of not bit freezing, i.e. 75m.
Major diameter destressing borehole, hole depth 25m, bore diameter 150mm, Kong Jian are implemented to roadway's sides using the inventive method
Away from 2m.After present invention construction, next class of normal condition can be constructed 4 destressing boreholes, i.e. 100m, efficiency is improved
33.3%.
Concrete scheme is as follows：
Prevent in a kind of described hard coal erosion control destressing borehole construction method, the coal seam crept into using machinery drilling and hydraulic jet
Drill hole drilling technology, step is：
(1) rush coal breakage body first with High-Pressure Water and form borehole profile；High-Pressure Water pressure is more than the pressure resistance of coal body
Degree, and no more than 30MPa.Bore diameter after punching is 100~150mm.
(2) rig is recycled to crush the coal body that punching falls；
(3) and then using current flushed zone coal dust is gone out.
A kind of hard coal erosion control destressing borehole construction equipment that above-mentioned construction method is used, including rig 2, the brill being sequentially connected
Bar 4, drill bit 6 and brill tooth 10, drill bit 6 and brill tooth 10 front end are provided with high pressure nozzle ejector, and drilling rod 4 is internally provided with into water
Pipe 5, one end of water inlet pipe 5 is connected with high-pressure water pipe 1 through rig 2, and the other end of water inlet pipe 5 is respectively with drill bit 6 and boring the front end of tooth 10
High pressure nozzle ejector connection.
The front end of drill bit 3 is provided with more than 3 by the center of circle of the center of drill bit 3 in the circular outer ring high pressure nozzle being distributed
Ejector 7, it is in that the circular inner ring high pressure nozzles being distributed are penetrated by the center of circle of the center of drill bit 3 to bore the front end of tooth 10 and be provided with more than 3
Device 8 is flowed, the annular radii of the formation of inner ring high pressure nozzle ejector 8 is less than the annular radii of the formation of outer ring high pressure nozzle ejector 7.
The drill bit 3 is PDC drill bit (polycrystalline diamond compact bit).
A diameter of 100mm of drill bit 3.
The brill tooth 10 includes the matrix 12 being fixedly connected with drill bit 6 and the wing 11 for protruding from the surface of matrix 12, inner ring
High pressure nozzle ejector 8 is located at the surface of matrix 12 outside wing 11, and helically formula is distributed (spiral wing 11 to the wing 11
Bit convolution effect can be reduced, contributes to landwaste to discharge).
The surface of the brill serrated knife wing 11 is provided with PDC teeth.
A kind of hard coal erosion control destressing borehole construction method of the present invention, the coal seam crept into using machinery drilling and hydraulic jet
Erosion control drilling drilling technology, rushes coal breakage body first with High-Pressure Water and forms borehole profile, recycles drill bit to rush the coal body of falling
It is broken, then take coal dust out of using water under high pressure backflow.So as to form " waterpower falls rock, mechanical rock breaking, backflow band rock " three-level drilling
Drilling technology, plays a part of drilling, pore-forming, depositing dust, row's powder, cooling." first rush and break afterwards " drilling technology changes mechanical drilling
Pattern, remains Mechanical Crushing characteristic, improves drilling drilling efficiency, waterpower erosion control characteristic has been merged, so as to effectively solve coal
The problems such as poorly efficient drilling of layer erosion control drilling, bit freezing lose bar, accumulated powder poly- dirt.
Hydraulic jet one side drill pore-forming, improves drilling efficiency, while providing cooling, lubricating effect for drilling rod operation；
On the other hand, drilling inner high voltage current are conducive to coal dust guide and depositing dust；In addition, hydraulic jet rushes coal breakage body in advance, reduce
Drilling rod confined pressure, is prevented effectively from bit freezing and loses bar；Hydraulic jet has the function of coal-bed flooding erosion control simultaneously.
The generation tool that the present invention prevents and treats Yuncheng field with "nine squares" rock blast hazard is of great significance, while the phase obtained
Closing achievement and other mining area rock blast hazards are prevented and treated also has certain impetus.Project achievement in research has huge push away
Wide application value.
Embodiment 2
Prevent in a kind of described hard coal erosion control destressing borehole construction method, the coal seam crept into using machinery drilling and hydraulic jet
Drill hole drilling technology, step is：
(1) rush coal breakage body first with High-Pressure Water and form borehole profile；High-Pressure Water pressure is more than the pressure resistance of coal body
Degree, and no more than 30MPa.Bore diameter after punching is 100~150mm.
(2) rig is recycled to crush the coal body that punching falls；
(3) and then using current flushed zone coal dust is gone out.
The hard coal refers to Protodyakonov coefficient f>2.
A kind of hard coal erosion control destressing borehole construction method of the present invention, the coal seam crept into using machinery drilling and hydraulic jet
Erosion control drilling drilling technology, rushes coal breakage body first with High-Pressure Water and forms borehole profile, recycles drill bit to rush the coal body of falling
It is broken, then take coal dust out of using water under high pressure backflow.So as to form " waterpower falls rock, mechanical rock breaking, backflow band rock " three-level drilling
Drilling technology, plays a part of drilling, pore-forming, depositing dust, row's powder, cooling.Hydraulic jet one side drill pore-forming, improves drilling effect
Rate, while providing cooling, lubricating effect for drilling rod operation；On the other hand, drilling inner high voltage current are conducive to coal dust guide and drop
Dirt.
Above-mentioned construction method uses ZQJG-580/10.0 type pneumatic drilling machines.Using the rig, the bit freezing of appearance loses bar phenomenon
Will more frequently relative to a kind of hard coal erosion control destressing borehole construction method in the embodiment of the present invention 1.
Claims (10)
1. a kind of hard coal erosion control destressing borehole construction method, it is characterised in that the coal crept into using machinery drilling and hydraulic jet
Layer erosion control drilling drilling technology, step is：
(1) rush coal breakage body first with High-Pressure Water and form borehole profile；
(2) rig is recycled to crush the coal body that punching falls；
(3) and then using current flushed zone coal dust is gone out.
2. a kind of hard coal erosion control destressing borehole construction method according to claim 1, it is characterised in that the hard coal refers to
Protodyakonov coefficient f>2.
3. a kind of hard coal erosion control destressing borehole construction method according to claim 1, it is characterised in that in step (1), high
Water flow pressure is pressed to be more than the compression strength of coal body, and no more than 30MPa.
4. a kind of hard coal erosion control destressing borehole construction method according to claim 1, it is characterised in that in step (1), punching
Bore diameter behind hole is 100~150mm.
5. a kind of hard coal erosion control destressing borehole construction equipment, it is characterised in that including the rig being sequentially connected, drilling rod, drill bit and
Tooth is bored, drill bit and brill tooth front end are provided with high pressure nozzle ejector, and drilling rod is internally provided with water inlet pipe, and water inlet pipe one end is passed through
Rig is connected with high-pressure water pipe, and high pressure nozzle ejector of the water inlet pipe other end respectively with drill bit and brill tooth front end is connected.
6. a kind of hard coal erosion control destressing borehole construction equipment according to claim 5, it is characterised in that the chisel edge
More than 3 are provided with by the center of circle of bit central in the circular outer ring high pressure nozzle ejector being distributed, tooth front end is bored and is provided with 3
Inner ring high pressure nozzle ejector more than individual by the center of circle of bit central in circular distribution, inner ring high pressure nozzle ejector is formed
Annular radii be less than outer ring high pressure nozzle ejector formation annular radii.
7. a kind of hard coal erosion control destressing borehole construction equipment according to claim 5, it is characterised in that the drill bit is
PDC drill bit.
8. a kind of hard coal erosion control destressing borehole construction equipment according to claim 5, it is characterised in that drill bit it is a diameter of
100mm。
9. a kind of hard coal erosion control destressing borehole construction equipment according to claim 6, it is characterised in that the brill tooth includes
The matrix that is fixedly connected with drill bit and the wing for protruding from matrix surface, inner ring high pressure nozzle ejector are located at the base outside wing
Body surface face, helically formula is distributed the wing.
10. a kind of hard coal erosion control destressing borehole construction equipment according to claim 7, it is characterised in that the brill serrated knife
Wing surface is provided with PDC teeth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710245236.5A CN107023295B (en) | 2017-04-14 | 2017-04-14 | Hard coal erosion-prevention pressure-relief drilling construction method and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710245236.5A CN107023295B (en) | 2017-04-14 | 2017-04-14 | Hard coal erosion-prevention pressure-relief drilling construction method and equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107023295A true CN107023295A (en) | 2017-08-08 |
| CN107023295B CN107023295B (en) | 2021-05-28 |
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| CN201710245236.5A Active CN107023295B (en) | 2017-04-14 | 2017-04-14 | Hard coal erosion-prevention pressure-relief drilling construction method and equipment |
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| CN111810057A (en) * | 2020-07-06 | 2020-10-23 | 山东科技大学 | Use method of advancing type full-automatic controllable reducing pressure relief connecting rod drill bit structure |
| CN113323660A (en) * | 2021-07-21 | 2021-08-31 | 辽宁工程技术大学 | High-stress high-hydraulic coal breaking and reaming device |
| CN115788286A (en) * | 2022-12-16 | 2023-03-14 | 中国矿业大学 | Coal rock body pressure relief type oval drilling guide slotting pressure relief method |
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| CN111810057A (en) * | 2020-07-06 | 2020-10-23 | 山东科技大学 | Use method of advancing type full-automatic controllable reducing pressure relief connecting rod drill bit structure |
| CN113323660A (en) * | 2021-07-21 | 2021-08-31 | 辽宁工程技术大学 | High-stress high-hydraulic coal breaking and reaming device |
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| CN115788286B (en) * | 2022-12-16 | 2023-10-31 | 中国矿业大学 | Coal rock mass pressure relief quasi-elliptic drilling guide slotting pressure relief method |
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