CN108343378B - A kind of coal seam rapid drilling method of the mechanical drilling of electric pulse auxiliary - Google Patents
A kind of coal seam rapid drilling method of the mechanical drilling of electric pulse auxiliary Download PDFInfo
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- CN108343378B CN108343378B CN201810081618.3A CN201810081618A CN108343378B CN 108343378 B CN108343378 B CN 108343378B CN 201810081618 A CN201810081618 A CN 201810081618A CN 108343378 B CN108343378 B CN 108343378B
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- coal
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- 238000005553 drilling Methods 0.000 title claims abstract description 94
- 239000003245 coal Substances 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000005684 electric field Effects 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 38
- 238000002347 injection Methods 0.000 claims description 25
- 239000007924 injection Substances 0.000 claims description 25
- 239000000243 solution Substances 0.000 claims description 10
- 238000009413 insulation Methods 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims description 8
- 238000002788 crimping Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims description 2
- 238000007654 immersion Methods 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 6
- 230000035515 penetration Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
Classifications
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Earth Drilling (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
A kind of coal seam rapid drilling method of the mechanical drilling of electric pulse auxiliary, the coal body in drilling front is impregnated first with the conductive ion solution with certain pressure, enhance coal body electric conductivity, then high electric field pulse generator is utilized, is discharged drilling front coal body, is generated huge energy and act directly on coal body, coal body is set to generate crack, to reduce mechanical drilling resistance, finally starts drilling machine, further extend drilling.One aspect of the present invention is remarkably improved the rate of penetration of profound drilling, guarantees the construction efficiency of drilling, on the other hand can effectively extend the service life of drilling tool.
Description
Technical field
The present invention relates to a kind of boring method suitable for the profound drilling in coal seam, especially a kind of electric pulse assists power auger
Into coal seam rapid drilling method.
Background technique
China's geological condition of coal mine is complicated, and with being continuously increased for pit mining depth, Gas Disaster has become restriction coal
One big factor of the safe and efficient production of mine, gas drainage are to administer the important means of Gas Disaster, are directed to apply to coal seam
Work mash gas pumping drilling, boring method efficiently, safe have important influence to gas drainage efficiency.
The tradition machinery drilling method that coal mine drilling uses at present, mainly using bore tooth to the impact of coal body, scraping and
Shear action is crushed coal body, to promote drilling, this method structure is simple, easy to operate, but in deep well drilling, with brill
The increase of hole depth, the torque and pulling force that drilling rod is born incrementally increase, and difficulty of construction significantly increases, and construction efficiency is caused to reduce,
Drill tool wear is serious.
Summary of the invention
In order to overcome the above-mentioned deficiency of the prior art, the coal seam that the present invention provides a kind of mechanical drilling of electric pulse auxiliary is quick
Boring method, this method can either significantly improve the rate of penetration of profound drilling, guarantee the construction efficiency of drilling, and can effectively prolong
The service life of long drilling tool.
The technical solution used to solve the technical problems of the present invention is that: it is molten first with the conductive ion with certain pressure
Liquid impregnates the coal body in drilling front, enhances coal body electric conductivity, then utilizes high electric field pulse generator, to drilling front coal body
It discharges, generates huge energy and act directly on coal body, coal body is made to generate crack, reduce mechanical drilling resistance, finally
Start drilling machine, further extends drilling.
Compared with prior art, the coal seam rapid drilling method of the mechanical drilling of a kind of electric pulse of the invention auxiliary, first with
The electric conductivity of conductive ion solution enhancing coal body with certain pressure, recycles high electric field pulse generator to generate huge energy
Amount directly acts on coal body, carries out preparatory fracturing to coal seam, so that drilling front coal body is generated crack, reduces mechanical drilling
Resistance effectively increases drilling efficiency, extends the service life of drill bit, solves the problems, such as that profound drilling drilling is difficult.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the construction schematic diagram of one embodiment of the invention.
Fig. 2 is I-I sectional view in Fig. 1.
In figure: the coal seam 1-, 2- drilling, 3- drill bit, 4- auger stem, 5- drilling machine, 6- hole packer, the needle-shaped positive electrode of 7-, 8-
Needle-shaped negative electrode, 9- insulation piston, 10- insulated spring, 11- insulated spring bracket, 12- cable, 13- crimping nose, 14- high pressure
Electric pulse generator, 15- high-pressure pipe connector, 16- high pressure water injection pipe, 17- pressure gauge, 18- water filling switch, 19- high pressure water-injection pump
It stands, 20- drainage switch, 21- drainage pumping plant.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without making creative work, belongs to protection scope of the present invention.
Figures 1 and 2 show that the structural schematic diagram of a preferred embodiment of the invention, one of Fig. 1 electric pulse are auxiliary
Help the mechanical coal seam rapid drilling method crept into, the specific steps are as follows:
A, the drilling 2 for a 2m depth of constructing in coal seam 1；
B, high electric field pulse generator 14, high-pressure water injecting pump station 19 and drainage pumping plant 21 are installed, drill bit 3, auger are connected
Bar 4 and drilling machine 5 inlay needle-shaped positive electrode 7, needle-shaped negative electrode 8 and high pressure water injection pipe 16, needle-shaped 7 He of positive electrode inside drill bit 3
Needle-shaped negative electrode 8 is embedded in one end of 3 tail portion inner cavity of drill bit through cable 12 and crimping nose 13 and high electric field pulse generator 14
The other end that positive and negative anodes connection, needle-shaped positive electrode 7 and needle-shaped negative electrode 8 stretch out drill bit 3 is located next to coal seam 1, high pressure water injection pipe 16
High-pressure water injecting pump station 19 and drainage pumping plant 21 are connected to through high-pressure pipe connector 15；Wherein, the drill bit 3 has a centre bore,
Four side holes are uniformly distributed around centre bore, centre bore is embedded in needle-shaped positive electrode 7, and four side holes are embedded in needle-shaped negative electrode 8, are boring
Any position on first 3 is additionally provided with one for being embedded in the side hole of high pressure water injection pipe 16, and the setting on the side hole meets high pressure water injection
Pipe 16 is protruded by 3 tail portion inner cavity of drill bit and is stretched out by 3 front end of drill bit；Needle-shaped positive electrode 7, needle-shaped negative electrode 8 and high pressure injection
Water pipe 16 is fixed on insulation piston 9, and insulation piston 9 is connected with insulated spring 10, and insulated spring 10 is fixed on insulated spring branch
On frame 11, needle-shaped positive electrode 7 and needle-shaped negative electrode 8 are connect with cable 12 respectively；The auger stem 4 is hollow drill pipe, center
High pressure water injection pipe 16 and cable 12 are installed；
C, it is sealed using 6 pairs of hole packer drillings 2, opens water filling switch 18, pass through high-pressure water injecting pump station 19 and high pressure
The solion that the injection pressure into drilling 2 of water injection pipe 16 is 30MPa, observes pressure gauge 17, keeps 2 internal water pressures of drilling constant
Water filling switch 18 is closed after 2h, and passes through the ion in drainage switch 20, drainage pumping plant 21, the extraction of high pressure water injection pipe 16 drilling 2
Solution, to improve the electric conductivity of 2 front coal bodies of drilling；
D, open high electric field pulse generator 14 charged (such as 100kV) pass through needle when voltage reaches setting value
Shape positive electrode 7 and 8 pairs of needle-shaped negative electrode 2 front coal bodies of drilling discharge, and huge energy directly acts on coal body, makes coal body
A large amount of cracks are generated, to reduce mechanical drilling resistance, after multiple discharge, close high electric field pulse generator 14；The electric discharge
Number can be 50 times；
E, start drilling machine 5, continue to promote drilling 2 using auger stem 4 and drill bit 3, when drilling resistance increases, bed drain purge subtracts
When small, stop drilling；During drilling, stretching structure is used for guard electrode, electrode can be made to retract, i.e., when needle-shaped positive electricity
Pole 7 and needle-shaped negative electrode 8 are contracted in hole under the action of insulated spring 10 after encountering coal body, to avoid abrasion；
F, when 4 length of auger stem is inadequate, stop creeping into, continued access auger stem 4, pass through spiral shell between multiple auger stems 4
Line connection, their internal cables 12 and high pressure water injection pipe 16 are connected with crimping nose 13 and high-pressure pipe connector 15 respectively, installation
After the completion, continue to creep into；
G, step c, d, e, f are repeated, until drilling 2 reaches predetermined depth.
In the present embodiment, 3 tail portion of drill bit is equipped with a cavity, is equipped with stretching structure, stretching structure packet in cavity
Insulated spring bracket 11, insulated spring 10 and insulation piston 9 are included, the installation of insulation piston 9 is in the cavity, needle-shaped positive electrode 7, needle-shaped
One end that negative electrode 8 and high pressure water injection pipe 16 protrude into cavity is fixed on insulation piston 9, and insulate piston 9 and 10 phase of insulated spring
Even, insulated spring 10 is fixed on insulated spring bracket 11, and insulated spring bracket 11 is supported on the end face of cavity bottom, it is needle-shaped just
Electrode 7 and needle-shaped negative electrode 8 are connect with cable 12 respectively.
Another embodiment can also be done, place unlike the embodiments above is only that, the pressure of the conductive ion solution
Power takes 12MPa, i.e., by high-pressure water injecting pump station 19 and high pressure water injection pipe 16, into drilling 2, injection pressure is that the ion of 12MPa is molten
Liquid, then pressure gauge 17 is observed, water filling switch 18 is closed after keeping the drilling constant 1h of 2 internal water pressures；The high electric field pulse occurs
The discharge frequency that device 14 is set is set as 15Hz, and discharge voltage takes 25kV.
Further embodiment is also only with the embodiment difference of front two, the conductive ion solution
Pressure takes 45MPa, i.e., the ion that injection pressure is 45MPa into drilling 2 by high-pressure water injecting pump station 19 and high pressure water injection pipe 16
Water, then pressure gauge 17 is observed, water filling switch 18 is closed after keeping the drilling constant 1.5h of 2 internal water pressures；The high electric field pulse hair
The discharge frequency that raw device 14 is set is set as 50Hz, and discharge voltage takes 180kV.
Three embodiments of the invention can use high-pressure ion solution quickly to penetrate into 2 front coal bodies of drilling, effectively be promoted
The conductivity of front coal body is discharged using 14 pairs of front coal bodies of high electric field pulse generator later, it is direct to generate huge energy
It acts on coal body, makes the 2 front coal bodies generation crack that drills, reduce the resistance of mechanical drilling, elevating mechanism drilling efficiency is reduced
Drill tool wear, the fast and efficient construction for the profound drilling in coal seam provide important technological means.
The above is only presently preferred embodiments of the present invention, not does limitation in any form to the present invention, it is all according to
According to technical spirit of the invention, any simple modification and same variation are made to above embodiments, each fall within guarantor of the invention
Within the scope of shield.
Claims (6)
1. a kind of coal seam rapid drilling method of the mechanical drilling of electric pulse auxiliary, first with the conductive ion for having certain pressure
Solution impregnates the coal body in drilling front, enhances coal body electric conductivity, then utilizes high electric field pulse generator, to drilling front coal
Body discharges, and generates huge energy and acts directly on coal body, and coal body is made to generate crack, reduces mechanical drilling resistance, most
After start drilling machine, further extend drilling；It is characterized in that: specific steps are as follows:
A, the drilling (2) for a 2m depth of constructing in coal seam (1)；
B, high electric field pulse generator (14), high-pressure water injecting pump station (19) and drainage pumping plant (21) are installed, drill bit (3), spiral shell are connected
Rotary drill bar (4) and drilling machine (5) inlay needle-shaped positive electrode (7), needle-shaped negative electrode (8) and high pressure water injection pipe inside drill bit (3)
(16), one end of needle-shaped positive electrode (7) and needle-shaped negative electrode (8) insertion drill bit (3) tail portion inner cavity is through cable (12) and crimping nose
Sub (13) are connect with the positive and negative anodes of high electric field pulse generator (14), and needle-shaped positive electrode (7) and needle-shaped negative electrode (8) stretch out drill bit
(3) the other end is located next to coal seam (1), and high pressure water injection pipe (16) is connected to high-pressure water injecting pump station (19) through high-pressure pipe connector (15)
With drainage pumping plant (21)；
C, drilling (2) is sealed using hole packer (6), by high-pressure water injecting pump station (19) and high pressure water injection pipe (16) to brill
The solion of injection certain pressure in hole (2), keeps the drilling constant 1-2h of (2) internal water pressure, then passes through drainage pumping plant
(21) the residual ion solution in extraction drilling (2), to make (2) front coal body immersion conductive ion solution that drills；
D, high electric field pulse generator (14) are opened to charge, when voltage reaches setting value, by needle-shaped positive electrode (7) and
Needle-shaped negative electrode (8) discharges to coal body in front of drilling (2), after multiple discharge, closes high electric field pulse generator (14)；
E, drilling machine (5) are opened, continues to promote drilling (2) using auger stem (4) and drill bit (3), when drilling resistance increases, deslagging
When amount reduces, stop drilling；
F, when auger stem (4) length is inadequate, stop drilling, continued access auger stem (4), when installation, by cable (12) and height
Pressure injection water pipe (16) is connected with crimping nose (13) and high-pressure pipe connector (15) respectively, after being installed, continues to creep into；
G, c-d-e-f is repeated, until drilling (2) reaches predetermined depth.
2. the coal seam rapid drilling method of a kind of mechanical drilling of electric pulse auxiliary according to claim 1, it is characterized in that: institute
The pressure limit for stating conductive ion solution is 10-50MPa.
3. the coal seam rapid drilling method of a kind of mechanical drilling of electric pulse auxiliary according to claim 1, it is characterized in that: institute
Discharge frequency that high electric field pulse generator (14) is set is stated as 10-50Hz, voltage range 20-200kV.
4. the coal seam rapid drilling method of a kind of mechanical drilling of electric pulse auxiliary according to claim 1, it is characterized in that: institute
Drill bit (3) to be stated with a centre bore, are uniformly distributed four side holes around centre bore, centre bore is embedded in needle-shaped positive electrode (7), and four
A side hole is embedded in needle-shaped negative electrode (8), and one is additionally provided on drill bit (3) for being embedded in the side hole of high pressure water injection pipe (16).
5. the coal seam rapid drilling method of a kind of mechanical drilling of electric pulse auxiliary according to claim 1, it is characterized in that: institute
Drill bit (3) tail portion is stated equipped with a cavity, is equipped with stretching structure in cavity, stretching structure includes insulated spring bracket (11), absolutely
Edge spring (10) and insulation piston (9), insulation piston (9) installation in the cavity, needle-shaped positive electrode (7), needle-shaped negative electrode (8) and
One end that high pressure water injection pipe (16) protrudes into cavity is fixed in insulation piston (9), and insulate piston (9) and insulated spring (10) phase
Even, insulated spring (10) is fixed on insulated spring bracket (11), and insulated spring bracket (11) is supported on the end face of cavity bottom,
Needle-shaped positive electrode (7) and needle-shaped negative electrode (8) are connect with cable (12) respectively.
6. a kind of coal seam rapid drilling method of mechanical drilling of electric pulse auxiliary according to claim 4 or 5, feature
Be: the auger stem (4) is hollow drill pipe, and middle part is equipped with high pressure water injection pipe (16) and cable (12), multiple spirals
Drilling rod is connected through a screw thread between (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810081618.3A CN108343378B (en) | 2018-01-29 | 2018-01-29 | A kind of coal seam rapid drilling method of the mechanical drilling of electric pulse auxiliary |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810081618.3A CN108343378B (en) | 2018-01-29 | 2018-01-29 | A kind of coal seam rapid drilling method of the mechanical drilling of electric pulse auxiliary |
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| CN108343378B true CN108343378B (en) | 2019-09-03 |
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| CN109372514A (en) * | 2018-11-12 | 2019-02-22 | 中铁工程装备集团有限公司 | Based on high pressure pulse discharge-mechanically combining broken rock novel silo drilling machine |
| CN110656879B (en) * | 2019-09-30 | 2021-07-30 | 中国铁建重工集团股份有限公司 | Electric pulse drill bit |
| CN110630173B (en) * | 2019-09-30 | 2021-03-23 | 中国铁建重工集团股份有限公司 | Core drilling machine |
| CN110485940B (en) * | 2019-09-30 | 2023-06-13 | 中国铁建重工集团股份有限公司 | Rock drilling trolley |
| CN111101868B (en) * | 2019-11-14 | 2021-04-06 | 中国石油大学(北京) | Jet flow PDC drill bit |
| CN111042732B (en) * | 2020-01-15 | 2020-10-30 | 中国矿业大学 | High-voltage electric pulse drilling device and using method thereof |
| CN113216853B (en) * | 2020-01-21 | 2023-04-11 | 新奥科技发展有限公司 | Composite drill bit and rock drilling device |
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| CN106988680A (en) * | 2017-05-27 | 2017-07-28 | 湖南科技大学 | Ice pellets abradant jet Aided Machine drills and coal seam cutting method |
| CN107630717A (en) * | 2017-09-18 | 2018-01-26 | 中国矿业大学 | The coal seam anti-reflection method that a kind of electric pulse mutually cooperates with coal-bed flooding |
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|---|---|---|---|---|
| CN202023547U (en) * | 2011-04-29 | 2011-11-02 | 中国矿业大学 | Coal mine underground pulsed hydraulic fracturing equipment |
| CN105275443A (en) * | 2015-11-06 | 2016-01-27 | 中国矿业大学 | Coal mine underground high-power electric knock assisted hydraulic fracturing permeability enhancement method |
| CN105298462A (en) * | 2015-11-06 | 2016-02-03 | 中国矿业大学 | High-power electric knocking assisted hydrofracture coal seam permeability increase method for end-located drainage roadway |
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