CN101446178B - Wind pressure air drilling equipment in downhole soft outbursting coal bed and process matched therewith - Google Patents
Wind pressure air drilling equipment in downhole soft outbursting coal bed and process matched therewith Download PDFInfo
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Abstract
The invention relates to wind pressure air drilling equipment in a downhole soft outbursting coal bed and a process matched therewith. At present, as the consequent layer drilling characterized by high construction speed, low cost and high gas extraction efficiency becomes the primary option for coal control and gas control in coal mines, for soft outbursting coal beds, the gas extraction efficiency is directly dependant upon the pore-forming rate of the consequent layer drilling. The equipment comprises a boring machine, an air compressor, an orifice dust collection and dust removal device, a high-strength large through-hole drill rod, a drill bit with an inner core which can automatically fall off, and an antistatic explosion-protection PVC sieve tube; the boring machine which has large power and large torque supplies power to drilling construction; the orifice dust collection and dust removal device collects and eliminates slack carried out by wind from the orifice during drilling; and the antistatic explosion-protection PVC sieve tube is transferred from the interior of the high-strength large through-hole drill rod to the bottom of the orifice without lifting a drill on the completion of drilling, and at last remains in the orifice, thereby ensuring the completeness of drilling. The equipment and the process matched therewith provided by the invention has the advantages of increasing the pore-forming rate of the consequent layer drilling in soft outbursting coal beds, improving the effect of gas extraction, improving the working atmosphere of downhole air drilling, and protecting the production safety of outbursting coal mines.
Description
Technical field
The present invention relates to creep under the coal mine equipment and process matching, be specifically related to soft projecting coal bed middle blast air drilling equipment in a kind of down-hole and process matched therewith.
Technical background
Control coal and gas are outstanding to be the great task that China's coal-mine faces, and is the essential measure of guaranteeing mine safety and carry out gas pumping.Since country's promulgation control of coalmine gas policy, the gas pumping technology is growing.The particularly intensive application of wearing layer hole of grid type for alleviating soft projecting coal bed gas control pressure, improve gas pumping efficient, reducing coal and gas outburst risk, has been played positive effect.But wear the great in constructing amount of layer hole simultaneously, the cost height, speed is low.And compare with wearing a layer hole, with the obvious advantage along the gas pumping of layer boring: as all to be in inside, coal seam along layer boring, effectively extraction rate height; Fast along layer drilling construction speed, cost is low.For the advantage of maximum performance, must improve hole depth and aperture along layer boring along layer boring.For soft projecting coal bed for, regularity of coal seam is poor, the gas bearing capacity height, pressure is big, along the hole lock of tool drilling that easily collapses in the layer drilling construction process, has limited to the application in suitable layer of hole so again.At present, domestic governing problem for soft projecting coal bed gas adopts the indirect layer hole method of wearing mostly; And adopt a mine along layer hole pumping and mining gas, and it is limited along layer drilling construction degree of depth, and substantially all below 100m, and boring aperture is less.How improving soft projecting coal bed gas control efficient is the important topic of studying at present.
From present technical development situation, the main selection that speed of application is fast, cost is low, the gas pumping rate is high along layer boring will becoming colliery control coal and gas control.For soft projecting coal bed, the one-tenth porosity of holing along layer has just directly determined gas pumping efficient especially.In order to improve the one-tenth porosity of weak seam, need present conventional construction equipment and process matched therewith be improved along layer boring.
Summary of the invention
The invention provides soft projecting coal bed middle blast air drilling equipment in a kind of down-hole and process matched therewith, can improve a present suitable layer hole construction method at soft projecting coal bed gas control, increase effective hole depth in suitable layer hole, raising is along a layer hole one-tenth porosity; Help the coal-bed gas extraction, reduce the outstanding disaster occurrence probability of coal and gas; Reduce the protrusion-dispelling cost, improve safety production efficiency.
Soft projecting coal bed middle blast air drilling equipment under the coal mine of the present invention, comprise rig, air compressor machine, aperture control of dust dust arrester, high strength large through-hole drilling rod, inner core come off automatically drill bit and antistatic explosion-proof PVC screen casing, it is characterized in that: the air compressor machine air outlet directly is connected with drilling rod with high-voltage tube, provides the pressure wind regime by drill pipe bore in boring.
Soft projecting coal bed middle blast air drilling equipment under the described coal mine, its aperture control of dust dust arrester directly is connected with orifice tube, and borehole sealing is become a confined space, helps the unified collection and treatment of cinder in the hole.
Under the described coal mine soft projecting coal bed in blast air drilling equipment, its aperture control of dust dust arrester when work, by shower nozzle to dust arrester internal spray water smoke to help the dirt that disappears.
Soft projecting coal bed middle blast air drilling equipment under the described coal mine, its high strength large through-hole drilling rod internal diameter is greater than antistatic explosion-proof PVC screen casing external diameter, can satisfy the intensity needs that normally creep into, also can satisfy the space requirement of carrying antistatic explosion-proof PVC screen casing in the drilling rod.
Soft projecting coal bed middle blast air drilling equipment under the described coal mine, its antistatic explosion-proof PVC screen casing is to punch to form on antistatic explosion-proof pvc pipe tube wall, makes it have gas permeability; Drilling and forming hole finishes the back and does not carry earlier brill, to carrying antistatic explosion-proof PVC screen casing at the bottom of the hole and it being stayed in the hole, guarantees the integrality of soft projecting coal bed boring by high strength large through-hole drilling rod inside, improves gas pumping efficient.
Soft projecting coal bed middle blast air drilling equipment under the described coal mine, its inner core drill bit that comes off automatically is made up of inner core and bit body two parts, at the bottom of being transported to the hole, antistatic explosion-proof PVC screen casing carries when boring, inner core be subjected to antistatic explosion-proof PVC screen casing responsive to axial force automatically and bit body come off, open passage thus antistatic explosion-proof PVC screen casing can be stayed in the hole in putting forward the brill process smoothly.
The process matched therewith of soft projecting coal bed middle blast air drilling equipment under the coal mine of the present invention may further comprise the steps:
The first step, the location and installation rig: fixing rig, according to the position of drill site situation reasonable Arrangement air compressor machine;
Second step connected footpath at a gulp drill bit by crossover sub on high strength large through-hole drilling rod, perforate makes it satisfy orifice tube requirement down;
In the 3rd step, following orifice tube is installed aperture control of dust dust arrester;
In the 4th step, replacing connects the drill bit that comes off automatically, connects air supply device, beginning is normally crept into: the unit head speed of gyration is controlled between the 120-200r/min, creeps into feeding rate and is controlled between the 1-2m/min, and air feed pressure maximum can reach 1.2MPa, at the uniform velocity creep into, until creeping into to the target hole depth;
The 5th step, reach drilling depth, stop boring, remove air supply device, begin to carry antistatic explosion-proof PVC screen casing from high strength large through-hole drilling rod is inner at the bottom of the hole in the hole, carry brill, come off the automatically inner core of drill bit of inner core is come off by the automatic and bit body of antistatic explosion-proof PVC screen casing responsive to axial force, guarantee that antistatic explosion-proof PVC screen casing stays in the hole simultaneously, normally carry brill;
The 6th step, carry brill and finish, remove facility, intact hole.
The present invention compared with prior art, and is practical, and easy to maintenance, can satisfy the soft projecting coal bed requirement of creeping into along the coal-bed gas extraction borehole under the coal mine fully; Adopted the air compressor machine of independent air feed, its air feed pressure and air quantity are more than the twice of at present most of used mine system wind regimes, under being used of aperture control of dust dust arrester, greatly reduce the work plane dust, big latus rectum drilling rod of Cai Yonging and the automatic separation-type drill bit of inner core have strengthened conveying screen casing operability simultaneously, effectively raise the one-tenth porosity along layer hole, improve soft projecting coal bed gas control efficient greatly, ensured the mine production safety.
Description of drawings
Fig. 1 is a drill site construction schematic top plan view of the present invention.
Fig. 2 is an aperture control of dust dust arrester schematic diagram.
Fig. 3 is the tear-away drill bit structure schematic diagram of inner core.
Fig. 4 is the cross section view for Fig. 3.
Fig. 5 is antistatic explosion-proof PVC screen construction schematic diagram.
Specific embodiment
Referring to Fig. 1, soft projecting coal bed middle blast air drilling equipment under the coal mine of the present invention, comprise rig, air compressor machine, aperture control of dust dust arrester, high strength large through-hole drilling rod, inner core come off automatically drill bit and antistatic explosion-proof PVC screen casing, it is characterized in that: the air compressor machine air outlet directly is connected with drilling rod with high-voltage tube, provides the pressure wind regime by drill pipe bore in boring.
Referring to Fig. 2, soft projecting coal bed middle blast air drilling equipment under the described coal mine, its aperture control of dust dust arrester directly is connected with orifice tube, and borehole sealing is become a confined space, helps the unified collection and treatment of cinder in the hole.Under the coal mine soft projecting coal bed in blast air drilling equipment, its aperture control of dust dust arrester when work, by shower nozzle to dust arrester internal spray water smoke to help the dirt that disappears.
Soft projecting coal bed middle blast air drilling equipment under the described coal mine, its high strength large through-hole drilling rod internal diameter is greater than antistatic explosion-proof PVC screen casing external diameter, can satisfy the intensity needs that normally creep into, also can satisfy the space requirement of carrying antistatic explosion-proof PVC screen casing in the drilling rod.
Referring to Fig. 5, soft projecting coal bed middle blast air drilling equipment under the described coal mine, its antistatic explosion-proof PVC screen casing is to punch to form on antistatic explosion-proof pvc pipe tube wall, makes it have gas permeability; Drilling and forming hole finishes the back and does not carry earlier brill, to carrying antistatic explosion-proof PVC screen casing at the bottom of the hole and it being stayed in the hole, guarantees the integrality of soft projecting coal bed boring by high strength large through-hole drilling rod inside, improves gas pumping efficient.
Referring to Fig. 3, Fig. 4, soft projecting coal bed middle blast air drilling equipment under the described coal mine, its inner core drill bit that comes off automatically is made up of inner core and bit body two parts, at the bottom of being transported to the hole, antistatic explosion-proof PVC screen casing carries when boring, inner core be subjected to antistatic explosion-proof PVC screen casing responsive to axial force automatically and bit body come off, open passage thus antistatic explosion-proof PVC screen casing can be stayed in the hole in putting forward the brill process smoothly.
The process matched therewith of soft projecting coal bed middle blast air drilling equipment under the coal mine of the present invention may further comprise the steps:
The first step, the location and installation rig: fixing rig, according to the position of drill site situation reasonable Arrangement air compressor machine;
Second step connected footpath at a gulp drill bit by crossover sub on high strength large through-hole drilling rod, perforate makes it satisfy orifice tube requirement down;
In the 3rd step, following orifice tube is installed aperture control of dust dust arrester;
In the 4th step, replacing connects the drill bit that comes off automatically, connects air supply device, beginning is normally crept into: the unit head speed of gyration is controlled between the 120-200r/min, creeps into feeding rate and is controlled between the 1-2m/min, and air feed pressure maximum can reach 1.2MPa, at the uniform velocity creep into, until creeping into to the target hole depth;
The 5th step, reach drilling depth, stop boring, remove air supply device, begin to carry antistatic explosion-proof PVC screen casing from high strength large through-hole drilling rod is inner at the bottom of the hole in the hole, carry brill, come off the automatically inner core of drill bit of inner core is come off by the automatic and bit body of antistatic explosion-proof PVC screen casing responsive to axial force, guarantee that antistatic explosion-proof PVC screen casing stays in the hole simultaneously, normally carry brill;
The 6th step, carry brill and finish, remove facility, intact hole.
Claims (5)
1. the soft projecting coal bed middle blast air drilling in down-hole is equipped, comprise rig (1), air compressor machine (2), aperture control of dust dust arrester (3), high strength large through-hole drilling rod (4), inner core come off automatically drill bit (5) and antistatic explosion-proof PVC screen casing (6), it is characterized in that: described air compressor machine (2) air outlet by high-voltage tube with in boring, provide the high strength large through-hole drilling rod (4) of pressure wind regime to be connected; Described high strength large through-hole drilling rod (4) internal diameter is greater than antistatic explosion-proof PVC screen casing (6) external diameter; The described inner core drill bit (5) that comes off automatically is made up of inner core and bit body two parts, can separate with bit body when inner core is subjected to axial force.
2. the soft projecting coal bed middle blast air drilling equipment in down-hole according to claim 1, it is characterized in that: described aperture control of dust dust arrester (3) is connected with orifice tube, constitutes a confined space.
3. the soft projecting coal bed middle blast air drilling equipment in down-hole according to claim 1 and 2 is characterized in that: the shower nozzle (7) to dust arrester internal spray water smoke is set in the described aperture control of dust dust arrester (3).
4. the soft projecting coal bed middle blast air drilling equipment in down-hole according to claim 3, it is characterized in that: described antistatic explosion-proof PVC screen casing (6) is for being provided with the antistatic explosion-proof pvc pipe of air-vent on the tube wall.
5. the process matched therewith of soft projecting coal bed middle blast air drilling equipment, it is characterized in that: its operation may further comprise the steps:
The first step, the location and installation rig: fixing rig (1), according to the position of drill site situation reasonable Arrangement air compressor machine (2);
Second step, go up connection footpath at a gulp drill bit at high strength large through-hole drilling rod (4), perforate makes it satisfy orifice tube requirement down;
In the 3rd step, following orifice tube is installed aperture control of dust dust arrester (3);
The 4th step, change to connect the inner core drill bit (5) that comes off automatically, connect air supply device, beginning is normally crept into: the unit head speed of gyration is controlled between the 120-200r/min, creeping into feeding rate is controlled between the 1-2m/min, air feed pressure maximum can reach 1.2MPa, at the uniform velocity creeps into, until creeping into to the target hole depth;
The 5th step, reach drilling depth, stop boring, remove air supply device, begin to carry antistatic explosion-proof PVC screen casing (6) from high strength large through-hole drilling rod (4) is inner at the bottom of the hole in the hole, carry brill, come off the automatically inner core (8) of drill bit (5) of inner core is come off by the automatic and bit body (9) of antistatic explosion-proof PVC screen casing (6) responsive to axial force, guarantee that antistatic explosion-proof PVC screen casing (6) stays in the hole simultaneously, normally carry brill;
The 6th step, carry brill and finish, remove facility, intact hole.
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| CN200810232256XA CN101446178B (en) | 2008-11-13 | 2008-11-13 | Wind pressure air drilling equipment in downhole soft outbursting coal bed and process matched therewith |
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| CN200810232256XA CN101446178B (en) | 2008-11-13 | 2008-11-13 | Wind pressure air drilling equipment in downhole soft outbursting coal bed and process matched therewith |
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| CN101446178B true CN101446178B (en) | 2011-11-16 |
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Owner name: XI AN RESEARCH INSTITUTE OF CHINA COAL TECHNOLOGY Free format text: FORMER NAME: SIAN BRANCH OF CHINA COAL RESEARCH INSTITUTE |
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Address after: 710075 Xi'an high tech Industrial Development Zone, Shaanxi, Jin Jin Road, No. 82 Patentee after: Xi'an Research Institute, CCTEG Address before: 710054 No. 52, Yanta Road, Xi'an, Shaanxi Patentee before: Sian Branch Of China Coal Research Institute |