CN103352718B - Fully-sealed wind power slagging gas-drainage deep well drilling system and method - Google Patents
Fully-sealed wind power slagging gas-drainage deep well drilling system and method Download PDFInfo
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- CN103352718B CN103352718B CN201310321778.8A CN201310321778A CN103352718B CN 103352718 B CN103352718 B CN 103352718B CN 201310321778 A CN201310321778 A CN 201310321778A CN 103352718 B CN103352718 B CN 103352718B
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Abstract
The invention discloses a fully-sealed wind power slagging gas-drainage deep well drilling system and method. The fully-sealed wind power slagging gas-drainage deep well drilling system comprises a drilling rod with inner holes, an inverted-spinning smashing dust-collection drill is arranged at the front end of the drilling rod, and the rear portion of the drilling rod is connected to a drilling machine. An orifice-sealed pipe, sealing fillers and a sealed pressing cover are arranged on the drilling rod. An air inlet portion with annular section is formed between the orifice-sealed pipe and the outer wall of the drilling rod, and the air inlet portion is connected with a movable type air compressor through a first connecting pipe. The rear end of the drilling rod is connected with a second connecting pipe through a pneumatic rotary connector, the second connecting pipe is connected with a drainage conveying pipeline slagging device, and the slagging port of the slagging device is connected with a slagging cylinder. The air outlet of the slagging cylinder is connected with a gas drainage pump through a third connecting pipe, and the gas drainage pump is connected with a gas drainage pipe. According to the fully-sealed wind power slagging gas-drainage deep well drilling system and method, pressing feeding type wind force in the outer annular space of the drilling rod and the drainage type wind force of the inner holes of the drilling rod can be utilized to discharge the coal scraps smoothly to carry out solid-gas separation, fully-sealed type wind power scrap discharge is achieved, the fact that hole-drilling operation is conducted continuously and safely is ensured, and working efficiency is improved.
Description
Technical field
The present invention relates to colliery soft projecting coal bed draw out methane hole-drilling system and method, particularly relate to the deep well drilling pore-forming system and method polluted without coal dust and drawing-off gas for the soft projecting coal bed totally-enclosed wind power slag-discharging in colliery.
Background technology
Adopting boring to carry out gas pumping is one of main method of gas control, is also the basis of comprehensive utilization gas.At the single coal bed exploitation projecting mine of high methane, coal and gas outburst mine and unprotect layer exploitation; the main region outburst prevention measures that coal-bed gas is stope is taken out in the boring of construction concordant in advance, and the degree of depth of holing in coal seam then determines the extraction efficiency of gas and the significant degree of improvement.
China soft projecting coal bed in drilling depth major part below 100 meters, trace it to its cause, just be soft projecting coal bed in pyrolysis, suffer architectonic destruction, ature of coal is soft, and gas permeability of coal seam is low, and gas bearing capacity is high, coal seam has the softening feature of moisture expantion, rib opposing external environment disturbance ability.Utilize conventional bore operation method when soft projecting coal bed middle construction extraction borehole, the phenomenons such as frequent generation collapse hole, plug-hole, spray orifice and crown drill, also do not improve the technical requirements that feasible technology and supporting drilling tool meet the soft projecting coal bed deep hole pore-forming of holing that draws out methane at present.
Because weak seam has the softening feature of moisture expantion, current conventional bore operation method all adopts the dry method drilling technique of compressed air drifting dust, namely utilize compressed air to blow at the bottom of hole from the endoporus of drilling rod, the ickings produced when drill bit is crept into and compressed air are carried along the annular space (annular space) between drilling rod and hole wall together.Due to the coarse injustice of hole wall, in pneumatic convey ickings process, comparison of resistance is large, and oarse-grained ickings easily produces local accumulation in annular space, thus causes the phenomenon such as plug-hole and crown drill.Meanwhile, the air-flow containing ickings along annular space ejection can cause the operating environment of work plane to pollute, and causes serious harm to the healthy of operating personnel.
In addition, the air-flow gas density of ejection is high, when running into the conditions such as high temperature, electrostatic and naked light, has the danger that gas and coal-dust explosion occur.At present, main employing arranges orifice dust catcher method in aperture carries out depositing dust, as multi-stage non-powered orifice dust remover (200920032546.X), mine wet-type tying deduster (200620110816.0) and extraction drilling dust collecting device (201110296642.7) etc.Special mining suction drill for coal mine (201110075077.1) then utilizes laying dust bag to realize the object reducing coal dust.But the said equipment is large due to volume, removes fast, fills and difficult, be difficult to the demand that adaptation bore position is frequently changed.Meanwhile, the air-flow sprayed by the annular space between drilling rod and hole wall, after dedusting, is still discharged in the air of operating environment, causes face gas concentration high, when running into the conditions such as high temperature, electrostatic and naked light, has the danger that gas explosion occurs.In addition, special mining suction drill for coal mine (201110075077.1) although be set with multi-stage filter core in the cavity at drill bit position, but in the process of creeping into continuously, filter core just can block by oarse-grained ickings very soon, ickings drill bit being cut fall cannot be siphoned away by wind-force, and what make drill bit cannot realize holing creeps into operation continuously.
Summary of the invention
A kind of totally-enclosed wind power slag-discharging is the object of the present invention is to provide to draw out methane deep well drilling system.
For achieving the above object, the draw out methane structure of deep well drilling system of totally-enclosed wind power slag-discharging of the present invention is: be forward direction with drilling direction, and comprise the drilling rod being provided with endoporus, this drilling rod comprises more than the two sections hollow drill pipe sections be screwed together successively; The front end of drilling rod is provided with backpitch and pulverizes dust suction drill bit, and the rear portion of drilling rod is connected on rig; On the drilling rod at drilling orifice place, coaxial sleeve is provided with orifice sealing pipe, and orifice sealing pipe extends to outside boring in holing, and the drilling rod of orifice sealing pipe rear end is provided with airtight and watertight padding and airtight and watertight padding is pressed on the gland between drilling rod and orifice sealing pipe; The ringwise inlet section of Formation cross-section between orifice sealing pipe and drilling-rod external wall, inlet section is connected with portable air compressor by the first tube connector; Drilling rod rear end is connected with the second tube connector by Pneumatic rotary joint, the other end of the second tube connector is connected with pump drainage transfer pipeline slag-discharging device, pump drainage transfer pipeline slag-discharging device has a slag-drip opening and a gas outlet, described slag-drip opening is connected with dregs discharge tube downwards, dregs discharge tube is interval with valve and lower valve; Described gas outlet is connected with gas suction pump by the 3rd tube connector, and gas suction pump is connected with drawing-off gas pipe.
Described backpitch is pulverized dust suction drill bit and is comprised connecting rod and more than three the backpitch wings evenly arranged, and the rib portion of each backpitch wing is equipped with blade; The rear end of each backpitch wing is all connected to the front end of described connecting rod, and the rear portion diameter of connecting rod is less than the main diameter of connecting rod and the connection part formed for jointed rod, and the peripheral surface of connection part is provided with connection screw thread; The axial air flue of through connecting rod before and after being provided with in axis position in described connecting rod, the front-end and back-end of axial air flue are all provided with horn mouth; The radial air flue be connected with described axial air flue is provided with, the radially through described connecting rod of radial air flue and its two ends are provided with horn mouth in described connecting rod; The horn mouth of axial air flue rear end is used for being connected with drilling rod, and the horn mouth of axial air flue front end and the horn mouth at radial air flue two ends are as air entry.
Described orifice sealing pipe is provided with the pressure meter for measuring described inlet section place blast.
Described Pneumatic rotary joint is provided with vacuum meter.
Mine car is provided with below described lower valve.
Described drawing-off gas pipe is provided with methane Concentration Measurement instrument.
Described pump drainage transfer pipeline slag-discharging device is provided with anti-clogging qi of chong channel ascending adversely mouth in its filter screen place, is connected with the 4th tube connector between described first tube connector and described anti-clogging qi of chong channel ascending adversely mouth; Described dregs discharge tube is provided with tempered glass observation panel.
The present invention also aims to provide a kind of totally-enclosed wind power slag-discharging to draw out methane deep well drilling method.
For achieving the above object, the totally-enclosed wind power slag-discharging of the present invention deep well drilling method that draws out methane utilizes the above-mentioned totally-enclosed wind power slag-discharging deep well drilling system that draws out methane to carry out, step is as follows: one, on soft projecting coal bed rib, be drilled with a sector hole and be inserted in this hole by orifice sealing tube portion, and seal or shutoff between orifice sealing pipe and hole wall, form orifice sealing; Insertion aperture, the drill bit side sealed tube of the hollow drill pipe two, clamped by rig, installs airtight and watertight padding, and uses gland to compress between drilling rod and orifice sealing pipe; Three, the first tube connector is utilized to be connected with portable air compressor by the pressure wind air inlet port on orifice sealing pipe; Four, in the rear end of the hollow drill pipe of rig clamping, Pneumatic rotary joint is installed, and utilizes the second tube connector to be connected with pump drainage transfer pipeline slag-discharging device by Pneumatic rotary joint; Five, close the lower valve on dregs discharge tube, open valve; Six, the 3rd tube connector is utilized the outlet of pump drainage transfer pipeline slag-discharging device to be connected with the air inlet port of portable gas suction pump.Seven, the gas bearing capacity in the portable gas suction pump institute pump drainage gas detected by methane Concentration Measurement instrument, draws out methane in pipeline system or nearest mine return air tunnel by drawing-off gas pipe access mine; Eight, open portable gas suction pump, observe numerical value shown in vacuum meter; Nine, open portable air compressor, observe numerical value shown in pressure meter; Ten, start rig and drive drilling rod, for drilling rod provides moment of torsion and thrust to carry out creeping into operation; 11, after rod boring reaches certain length, the Pneumatic rotary joint of hollow drill pipe is backed out, utilize thread connection that the new hollow drill pipe section of one joint is installed at the end of hollow drill pipe, drilling rod is lengthened, and Pneumatic rotary joint and tube connector are connected in the end of the hollow drill pipe of lengthening, further creep into operation; 12, after completing required drilling depth, drilling rod is risen and pulls out.
Creeping in operation process, observing the ickings amount in slag-discharging device by tempered glass observation panel on dregs discharge tube, operator determines whether deslagging according to ickings amount; During deslagging, first close and close valve, then open lower valve and carry out deslagging, ickings directly loads mine car; After ickings discharge terminates, first close lower valve, then open valve.
Utilize the 4th tube connector to connect the anti-clogging qi of chong channel ascending adversely mouth of the first tube connector and pump drainage transfer pipeline slag-discharging device, regularly utilize compressed air to wash away cleaning to the filter screen in slag-discharging device creeping in operation process, prevent filter net jam.
The present invention has following advantage:
(1) the totally-enclosed wind power slag-discharging of the present invention deep well drilling system and method that draws out methane adopts backpitch to pulverize dust suction drill bit to carry out brokenly rock and creep into operation, and coal petrography gets off from cut rib by the blade on drill bit wing.The ickings that particle is large is reversed under the effect of backpitch wing pushes hole ground coal wall to, under the common extruding and cut of backpitch wing and blade, the large ickings of particle is by further fragmentation, form the tiny coal dust of particle being suitable for gas conveying, thus can air-flow be utilized swimmingly to be extracted out by ickings.
(2) this system carries out pressure sending type Geldart-D particle by the annular space (annular space) between hollow drill pipe and hole wall, pump-drainage type Geldart-D particle is carried out by the endoporus of hollow drill pipe, rotate at drilling rod, under the acting in conjunction of positive and negative blast and backpitch wing, drill bit place at the bottom of coal bed drilling hole forms strong air-flow vortex, the coal dust making particle tiny suspends in the gas flow fully, and under the gas negative pressure effect of hollow drill pipe endoporus, the endoporus that tiny coal dust is inhaled into drilling rod through air entry discharges.The phenomenons such as the channel of chip removal blocking that the chip removal mode of this system can be avoided causing because of collapse hole in conventional borehole operation process and bit freezing.Meanwhile, in air-flow vortex and hollow drill pipe endoporus gas negative pressure effect under, the gas that rib can be parsed promptly discharges through hollow drill pipe endoporus, thus avoids the generation of the phenomenons such as crown drill, spray orifice and coal big gun.
(3) this system is being undertaken in the process of pressure sending type Geldart-D particle by the annular space between hollow drill pipe and hole wall, drill bit can be transported to from the cinder that hole wall drops by because of reasons such as drilling rod vibrations, the ickings that particle is large is pushed to rib under the effect of backpitch wing, under the further extruding and cut of backpitch wing and blade, the large ickings of particle is by further fragmentation, form the tiny coal dust of particle being suitable for gas conveying, the coal dust that particle is little then enters into air-flow vortex, and the endoporus sucking drilling rod through drill bit air entry carries out chip removal.So just exempt from conventional borehole system job process, in the annular space between drilling rod and hole wall, the phenomenon such as collapse hole and plug-hole has occurred.
(4) this system while bore operation, can realize the operation of totally enclosed type deslagging.Utilize pump drainage transfer pipeline slag-discharging device that ickings entrained in delivery air is carried out dust removal by filtration, and ickings is kept in slag-discharging device, wait when reaching certain storage capacity, by operating personnel by the upper and lower valve of operation, ickings is discharged in mine car, realizes the ickings discharge revealed without gas.According to the gas bearing capacity in portable gas suction pump institute pump drainage gas, the drawing-off gas pipe access mine of the delivery air after dust removal by filtration through portable gas suction pump is drawn out methane pipeline system or nearest mine return air tunnel.This system achieves totally enclosed type wind power slag-discharging, and avoiding conventional borehole system transfinites the gas bearing capacity caused in airflow exits gassy to the operating environment in tunnel and the phenomenon such as gas and coal-dust explosion.
(5) compressed air that this system also can utilize portable air compressor to provide regularly carries out fast flush to the filter screen in pump drainage transfer pipeline slag-discharging device by anti-clogging qi of chong channel ascending adversely mouth, avoid the phenomenon that long-play causes filter screen to be blocked by granule coal dust, ensure the unimpeded of wind power slag-discharging transfer pipeline.
The feature that the present invention the gives prominence to pump-drainage type wind-force that to be the pressure sending type wind-force that utilizes portable air compressor to be formed at drilling rod outer ring space formed at drill pipe bore with gas suction pump is by smooth and easy for ickings discharge and carry out solid and gas and be separated, and realizes the chip removal of totally enclosed type wind-force.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation that in the present invention, backpitch pulverizes dust suction drill bit.
Detailed description of the invention
Be forward direction with drilling direction in the present invention.
As depicted in figs. 1 and 2, totally-enclosed wind power slag-discharging of the present invention draws out methane deep well drilling system, and comprise the drilling rod 8 being provided with endoporus, this drilling rod 8 comprises more than the two sections hollow drill pipe sections be screwed together successively; The front end of drilling rod 8 is provided with backpitch and pulverizes dust suction drill bit 13, and the rear portion of drilling rod 8 is connected on rig 7.
On the drilling rod 8 at drilling orifice place, coaxial sleeve is provided with orifice sealing pipe 11, orifice sealing pipe 11 is by extending to outside boring in boring, and the drilling rod 8 of orifice sealing pipe 11 rear end is provided with airtight and watertight padding 10 and airtight and watertight padding 10 is pressed on the gland 9 between drilling rod 8 and orifice sealing pipe 11; The ringwise inlet section 32 of Formation cross-section between orifice sealing pipe 11 and drilling rod 8 outer wall, inlet section 32 is connected with portable air compressor 1 by the first tube connector 14.
Drilling rod 8 rear end is connected with the second tube connector 16 by Pneumatic rotary joint 5, the other end of the second tube connector 16 is connected with pump drainage transfer pipeline slag-discharging device 3, pump drainage transfer pipeline slag-discharging device 3 has slag-drip opening 20 and a gas outlet 21, described slag-drip opening 20 is connected with dregs discharge tube 27 downwards, dregs discharge tube 27 is interval with valve 18 and lower valve 19; The gas outlet 21 of described pump drainage transfer pipeline slag-discharging device 3 is connected with gas suction pump 2 by the 3rd tube connector 22, and gas suction pump 2 is connected with drawing-off gas pipe 23, and drawing-off gas pipe 23 is provided with drawing-off gas valve 24.
As shown in Fig. 2 and Fig. 1, described backpitch pulverizes the backpitch wing 132 that dust suction drill bit 13 comprises more than connecting rod 135 and three (preferable range is 3-6) evenly setting, and the rib portion of each backpitch wing 132 is equipped with blade 131; The rear end of each backpitch wing 132 is all connected to the front end of described connecting rod 135, and the rear portion diameter of connecting rod 135 is less than the main diameter of connecting rod 135 and the connection part 136 formed for jointed rod 8, and the peripheral surface of connection part 136 is provided with and connects screw thread 134; The axial air flue 137 of through connecting rod 135 before and after being provided with in axis position in described connecting rod 135, the front-end and back-end of axial air flue 137 are all provided with horn mouth; The radial air flue 138 be connected with described axial air flue 137 is provided with, the radially through described connecting rod 135 of radial air flue 138 and its two ends are provided with horn mouth in described connecting rod 135; The horn mouth of axial air flue 137 rear end is used for being connected with drilling rod 8, and the horn mouth of axial air flue 137 front end and the horn mouth at radial air flue 138 two ends are as air entry 133.
Described orifice sealing pipe 11 is provided with the pressure meter 12 for measuring described inlet section 32 place blast.Described Pneumatic rotary joint 5 is provided with vacuum meter 6.Mine car 4 is provided with below described lower valve 19.Described drawing-off gas pipe 23 is provided with methane Concentration Measurement instrument 15.
Described pump drainage transfer pipeline slag-discharging device 3 is provided with anti-clogging qi of chong channel ascending adversely mouth 31 in its filter screen (slag-discharging device 3 filter screen is prior art, and figure does not show) place, is connected with the 4th tube connector 17 between described first tube connector 14 and described anti-clogging qi of chong channel ascending adversely mouth 31; Described dregs discharge tube 27 is provided with tempered glass observation panel (tempered glass observation panel is routine techniques, and figure does not show).
Wherein, pump drainage transfer pipeline slag-discharging device 3 is preferably erected on mine car 4, moves with the position of mine car 4 according to boring.
The invention also discloses a kind of draw out methane totally-enclosed wind power slag-discharging of deep well drilling system of above-mentioned totally-enclosed wind power slag-discharging that uses to draw out methane deep well drilling method, the method is carried out successively according to the following steps:
(1) on soft projecting coal bed rib, be drilled with a sector hole and orifice sealing pipe 11 is inserted partially in this hole, and sealing or shutoff between orifice sealing pipe 11 and hole wall, forming orifice sealing 25.
(2) insertion aperture, the drill bit 13 side sealed tube 11 of the hollow drill pipe 8 clamped by rig 7, installs airtight and watertight padding 10, and uses gland 9 to compress between drilling rod 8 and orifice sealing pipe 11.
(3) the first tube connector 14 is utilized to be connected with portable air compressor 1 by the pressure wind air inlet port 26 on orifice sealing pipe 11.
(4) in the rear end of the hollow drill pipe 8 of rig 7 clamping, Pneumatic rotary joint 5 is installed, and utilizes the second tube connector 16 to be connected with pump drainage transfer pipeline slag-discharging device 3 by Pneumatic rotary joint 5.
(5) close the lower valve 19 on dregs discharge tube 27, open valve 18.
(6) the 3rd tube connector 22 is utilized to be connected by the air inlet port of the outlet of pump drainage transfer pipeline slag-discharging device 3 with portable gas suction pump 2.
(7) gas bearing capacity in 2 the pump drainage gases of the portable gas suction pump detected by methane Concentration Measurement instrument 15, accesses mine and draws out methane in pipeline system or nearest mine return air tunnel by drawing-off gas pipe 23.
(8) open portable gas suction pump 2, observe numerical value shown in vacuum meter 6.
(9) open portable air compressor 1, observe numerical value shown in pressure meter 12.
(10) start rig 7 and drive drilling rod 8, for drilling rod 8 provides moment of torsion and thrust to carry out creeping into operation;
(11) after drilling rod 8 creeps into and reaches certain length, the Pneumatic rotary joint 5 of hollow drill pipe 8 is backed out, utilize thread connection that the new hollow drill pipe section of one joint is installed at the end of hollow drill pipe 8, drilling rod 8 is lengthened, and Pneumatic rotary joint 5 and tube connector 14 are connected in the end of the hollow drill pipe 8 of lengthening, further creep into operation.
(12), after completing required drilling depth, 8, drilling rod is pulled out.
Creeping in operation process, observing the ickings amount in slag-discharging device 3 by tempered glass observation panel on dregs discharge tube 27, operator determines whether deslagging according to ickings amount; During deslagging, first close close valve 18, then open lower valve 19 carry out deslagging (because upper valve 18 is in closed condition, therefore can realize during deslagging without gas reveal ickings discharge), ickings directly loads mine car 4; After ickings discharge terminates, first close lower valve 19, then open valve 18.
Utilize the 4th tube connector 17 to connect the anti-clogging qi of chong channel ascending adversely mouth 31 of the first tube connector 14 and pump drainage transfer pipeline slag-discharging device 3, regularly utilize compressed air to wash away cleaning to the filter screen in slag-discharging device 3 creeping in operation process, prevent filter net jam.
The present invention utilizes the annular space between drilling rod 8 and hole wall (annular space) to blow, utilize the endoporus of drilling rod 8 rule to be extracted out by ickings, make ickings on transport path can not in the past the same to produce on transport path because of reasons such as the coarse injustice of hole wall, the defeated comparison of resistance of air-flow are large pile up, blocking.The present invention, by being connected with drilling rod 8 endoporus as ickings transfer passage by slag-discharging device 3, avoids in the past along the phenomenon causing work plane operating environment to pollute containing the air-flow of ickings of annular space ejection, thus ensures that the healthy of operating personnel is not endangered.Slagging structure in the present invention (pump drainage transfer pipeline slag-discharging device 3 and corresponding connecting line) volume is little, be easy to install, and can remove fast, fills and carry, can meet the demand that bore position is frequently changed, substantially increase operating efficiency.
Above embodiment is the unrestricted technical scheme of the present invention in order to explanation only, although with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: still can modify to the present invention or equivalent replacement, and not departing from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (9)
1. totally-enclosed wind power slag-discharging draws out methane deep well drilling system, it is characterized in that: take drilling direction as forward direction;
Comprise the drilling rod being provided with endoporus, this drilling rod comprises more than the two sections hollow drill pipe sections be screwed together successively; The front end of drilling rod is provided with backpitch and pulverizes dust suction drill bit, and the rear portion of drilling rod is connected on rig;
On the drilling rod at drilling orifice place, coaxial sleeve is provided with orifice sealing pipe, and orifice sealing pipe extends to outside boring in holing, and the drilling rod of orifice sealing pipe rear end is provided with airtight and watertight padding and airtight and watertight padding is pressed on the gland between drilling rod and orifice sealing pipe; The ringwise inlet section of Formation cross-section between orifice sealing pipe and drilling-rod external wall, inlet section is connected with portable air compressor by the first tube connector;
Drilling rod rear end is connected with the second tube connector by Pneumatic rotary joint, the other end of the second tube connector is connected with pump drainage transfer pipeline slag-discharging device, pump drainage transfer pipeline slag-discharging device has a slag-drip opening and a gas outlet, described slag-drip opening is connected with dregs discharge tube downwards, dregs discharge tube is interval with valve and lower valve; Described gas outlet is connected with gas suction pump by the 3rd tube connector, and gas suction pump is connected with drawing-off gas pipe;
Described pump drainage transfer pipeline slag-discharging device is provided with anti-clogging qi of chong channel ascending adversely mouth in its filter screen place, is connected with the 4th tube connector between described first tube connector and described anti-clogging qi of chong channel ascending adversely mouth; Described dregs discharge tube is provided with tempered glass observation panel.
2. totally-enclosed wind power slag-discharging according to claim 1 draws out methane deep well drilling system, it is characterized in that: described backpitch is pulverized dust suction drill bit and comprised connecting rod and more than three the backpitch wings evenly arranged, and the rib portion of each backpitch wing is equipped with blade; The rear end of each backpitch wing is all connected to the front end of described connecting rod, and the rear portion diameter of connecting rod is less than the main diameter of connecting rod and the connection part formed for jointed rod, and the peripheral surface of connection part is provided with connection screw thread; The axial air flue of through connecting rod before and after being provided with in axis position in described connecting rod, the front-end and back-end of axial air flue are all provided with horn mouth; The radial air flue be connected with described axial air flue is provided with, the radially through described connecting rod of radial air flue and its two ends are provided with horn mouth in described connecting rod; The horn mouth of axial air flue rear end is used for being connected with drilling rod, and the horn mouth of axial air flue front end and the horn mouth at radial air flue two ends are as air entry.
3. totally-enclosed wind power slag-discharging according to claim 2 draws out methane deep well drilling system, it is characterized in that: described orifice sealing pipe is provided with the pressure meter for measuring described inlet section place blast.
4. totally-enclosed wind power slag-discharging according to claim 3 draws out methane deep well drilling system, it is characterized in that: described Pneumatic rotary joint is provided with vacuum meter.
5. totally-enclosed wind power slag-discharging according to claim 4 draws out methane deep well drilling system, it is characterized in that: be provided with mine car below described lower valve.
6. totally-enclosed wind power slag-discharging according to any one of claim 1 to 5 draws out methane deep well drilling system, it is characterized in that: described drawing-off gas pipe is provided with methane Concentration Measurement instrument.
7. utilize the draw out methane totally-enclosed wind power slag-discharging of deep well drilling system of totally-enclosed wind power slag-discharging described in claim 6 to draw out methane deep well drilling method, it is characterized in that carrying out according to the following steps successively:
One, on soft projecting coal bed rib, be drilled with a sector hole and orifice sealing tube portion is inserted in this hole, and sealing or shutoff between orifice sealing pipe and hole wall, forming orifice sealing;
Insertion aperture, the drill bit side sealed tube of the hollow drill pipe two, clamped by rig, installs airtight and watertight padding, and uses gland to compress between drilling rod and orifice sealing pipe;
Three, the first tube connector is utilized to be connected with portable air compressor by the pressure wind air inlet port on orifice sealing pipe;
Four, in the rear end of the hollow drill pipe of rig clamping, Pneumatic rotary joint is installed, and utilizes the second tube connector to be connected with pump drainage transfer pipeline slag-discharging device by Pneumatic rotary joint;
Five, close the lower valve on dregs discharge tube, open valve;
Six, the 3rd tube connector is utilized the outlet of pump drainage transfer pipeline slag-discharging device to be connected with the air inlet port of portable gas suction pump;
Seven, the gas bearing capacity in the portable gas suction pump institute pump drainage gas detected by methane Concentration Measurement instrument, draws out methane in pipeline system or nearest mine return air tunnel by drawing-off gas pipe access mine;
Eight, open portable gas suction pump, observe numerical value shown in vacuum meter;
Nine, open portable air compressor, observe numerical value shown in pressure meter;
Ten, start rig and drive drilling rod, for drilling rod provides moment of torsion and thrust to carry out creeping into operation;
11, after rod boring reaches certain length, the Pneumatic rotary joint of hollow drill pipe is backed out, utilize thread connection that the new hollow drill pipe section of one joint is installed at the end of hollow drill pipe, drilling rod is lengthened, and Pneumatic rotary joint and tube connector are connected in the end of the hollow drill pipe of lengthening, further creep into operation;
12, after completing required drilling depth, drilling rod is risen and pulls out.
8. totally-enclosed wind power slag-discharging according to claim 7 draws out methane deep well drilling method, it is characterized in that:
Creeping in operation process, observing the ickings amount in slag-discharging device by tempered glass observation panel on dregs discharge tube, operator determines whether deslagging according to ickings amount; During deslagging, first close and close valve, then open lower valve and carry out deslagging, ickings directly loads mine car; After ickings discharge terminates, first close lower valve, then open valve.
9. totally-enclosed wind power slag-discharging according to claim 8 draws out methane deep well drilling method, it is characterized in that: utilize the 4th tube connector to connect the anti-clogging qi of chong channel ascending adversely mouth of the first tube connector and pump drainage transfer pipeline slag-discharging device, regularly utilize compressed air to wash away cleaning to the filter screen in slag-discharging device creeping in operation process, prevent filter net jam.
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