CN101975023A - Method and device for drilling deep and long gas drainage hole in soft coal seam along layers - Google Patents
Method and device for drilling deep and long gas drainage hole in soft coal seam along layers Download PDFInfo
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Abstract
The invention relates to a method and a device for drilling a deep and long gas drainage hole in a soft coal seam along layers. In the method, the characteristics that holes can be formed in hard coal layers and a roof-to-floor plate and soft coals have layered gas content are used to ensure that gas pre-drainage holes are drilled in the hard coal layers and the roof-to-floor plate, the length of the hole can meet requirements on gas pre-drainage, then high-pressure pulsed water jets are used for cutting through the hard coal layers to soft coal layers, and a deep notch of which the diameter is 1 to 2 meters is formed in the soft coal layers, so the exposed area of the soft coal layers is increased in favor of gas emission from the soft coal layers. The method and the device solve the problems of small gas pre-drainage hole drainage range, poor gas pre-drainage effect and the like caused by drill pipe sticking, hole collapse and hole jetting, and simultaneously fulfill the aims of increasing the length of the pre-drainage hole and improving the coal seam air permeability.
Description
Technical field
The present invention relates to a kind of safety of coal mines control device and method thereof, relate in particular to a kind of method and device that creeps into the profound gas pumping of weak seam hole along layer.
Background technology
Most of colliery, China southwest is a coal and gas outburst mine, and along with coal production increase and mine extend to the deep, coal and gas outburst mine increases gradually.Coal and gas outstanding problem become the principal element of influence safety in production.The measure of control gas at present mainly contains the exploitation topping and takes out coal-bed gas in advance.But southwestern most of colliery has not had the coal seam to can be used as topping, and taking out the coal seam in advance becomes unique measure of administering gas.Pre-gas pumping mode mainly contains wears a layer extraction, this layer extraction, goaf extraction etc., wherein this layer extraction effect optimum.Mining area coal seam, southwest is soft and gas bearing capacity is high, very easily occurs phenomenons such as bit freezing, the hole of collapsing, spray orifice in the process of creeping into, and it is less to cause gas to take out hole extraction scope in advance, occurs gas drainage under suction " blank tape " in the coal seam easily.Though can creep into deep and long hole in the hard layering in coal seam, gas bearing capacity is less in the hard layering, does not still reach the requirement that draws out methane on a large scale.
" the long-range gas pressure relief extraction of the soft high seam of the high gas of low-permeable put method (application number: 03113094.1) " of Yuan Liang, " goaf gas drainage method of stope working surface of coal mines (application number: 200710054520.0) " of Guo Guozheng is only applicable to soft high seam, and mainly be by changing bore arrangement mode, improve the extraction amount of gas, but it is shallow to exist drilling depth, drill hole density is big, shortcomings such as the effective range of firedamp drainage is little, and cherry coal and projecting coal bed in drill and often cause the hole of collapsing, stick of tool, crown drill, spray orifice phenomenon and because drill bit, the rubbing action of drilling rod and coal petrography causes drill bit drilling rod temperature too high and quickened the rate of wear of drill bit.Because the gas permeability in coal seam is low, the extraction effect of existing drilling method is undesirable, with the coal mine gas hazard management requirement of gas drainage under suction is compared, and weak seam extraction effect in colliery, China southwest has much room for improvement.
Summary of the invention
The present invention is in order to overcome the deficiencies in the prior art, and a kind of method and the device that creeps into the profound gas pumping of weak seam hole along layer that provides, avoid that hole extraction scope is little, gas is taken out problems such as weak effect in advance because of the gas that bit freezing, the hole of collapsing, spray orifice cause is taken out in advance, reach the purpose that increase is taken out hole length in advance, improved gas permeability of coal seam simultaneously.
The technical solution used in the present invention:
A kind of device that creeps into the profound gas pumping of weak seam hole along layer, it comprises fluid box, be connected with hydraulic pump by pipeline on the fluid box, first pipeline of hydraulic pump rear end is provided with switch, divide on the pipeline between hydraulic pump and the switch and be connected to second pipeline, second pipeline is provided with overflow valve, switch punishment is provided with the 3rd pipeline, the 3rd pipeline is provided with globe valve, first pipeline of switch rear end is provided with the sealing transfusion device, sealing transfusion device rear end is connected with rig, and described rig comprises the drill bit of drilling rod and drilling rod rear end, and the drilling rod front end is connected with the sealing transfusion device, the drilling rod outside is provided with handle, be provided with automatic switchover formula joint-cutting device between drilling rod and the drill bit, the drill bit afterbody is provided with axial nozzle, and automatic switchover formula joint-cutting device is provided with radial nozzles and pick.
Be provided with pressure meter on above-mentioned first pipeline between switch and sealing transfusion device.
The number of above-mentioned axial nozzle is a plurality of, and one of them is in bit central, and all the other are circle distribution at the drill bit periphery.
The second above-mentioned pipeline all is connected with fluid box with the 3rd pipeline.
Utilize above-mentioned arbitrary described device to carry out creeping into along layer the method in the profound gas pumping of weak seam hole, this method is carried out as follows:
1) select bore mode: investigate to analyze to execute and bore the place condition of coal seam occurrence, if soft, hard layering layering is clear in the coal seam, described soft layering mostly is powder coal-full fine coal, its solid coefficient
fBetween being between 0.25 ~ 0.2525, hard layering mostly is non-destruction coal-destruction coal, its solid coefficient
fGreater than 0.2525, then be chosen in and creep in the hard layering, if hierarchical fuzzy is chosen in and creeps in the roof and floor along layer hole along layer hole;
2) preparation of being correlated with before the boring: check the firm and sealing of each connecting line in the pre-gas pumping device of coal bed drilling, and rationally arrange the distance of hydraulic pump and job location, coal seam, the primer fluid press pump, the working flow of regulator solution press pump and pressure are respectively its nominal operation flow and rated operating pressure, close the overflow valve on second pipeline, open the globe valve on the 3rd pipeline, Closing Switch, liquid in the hydraulic fluid tank is after the hydraulic pump pressurization, a part flows back to hydraulic fluid tank through overflow valve, a part flows to drilling rod through first pipeline and switch, and the liquid that flows to drilling rod flows out by the axial nozzle outflow of drill bit and/or the radial nozzles in the automatic switchover formula joint-cutting device;
3) rig advances, holes: start rig, regulate globe valve, control pump is pressed in about 5MPa, close the radial nozzles of automatic switchover formula joint-cutting device, open the axial nozzle of drill bit, highly pressurised liquid enters the sealing transfusion device through first pipeline, pass through drilling rod again, highly pressurised liquid is assisted through axial nozzle formation pulsing jet impact coal body and is crept into, when needs are changed drilling rod, and trip switch, stopping rig advancing, rotates, unload the lower seal transfusion device, add a new drilling rod, repeat successively;
4) judge whether rig continues to creep into:, then continue repeating step 3) if drilling depth does not reach desired depth; When drilling depth reaches desired depth or boring and passes whole coal seam, stop to creep into;
5) coal body is carried out slot: creep into when finishing, maintained switch is in closure state, regulate globe valve, control pump is pressed in 25 ~ 30MPa, the radial nozzles of formula joint-cutting device of automaticallying switch this moment is opened, the axial nozzle 14 of drill bit is closed, highly pressurised liquid forms pulsing jet through radial nozzles, rotary drill rod, begin coal body is cut, the pick on the automatic switchover formula joint-cutting device will cut to be come to the bulk coal cinder to grind to form diameter is that the fine particle of 0.1 ~ 5mm is discharged smoothly with backwater, after slot is finished, according to the coal seam and the different of angle of holing, can form diameter in the coal seam be the deep trouth of 1 ~ 2m;
5) judge whether to need to continue slot: limpid in the slot process if occur returning water in the boring, no cinder returns out, can illustrate that then slot finishes, trip switch, unload the lower seal transfusion device, unload many drilling rods, will remain drilling rod again and be connected with the sealing transfusion device, Closing Switch is carried out the cutting of another seam to coal body; Cinder continues to occur in the liquid if return in the slot, but the slot time surpass one hour, can think that slot finishes this moment, and prepare next bar slit is cut that circulation is according to this taken out the terminal 5m of pipe place in advance until distance gas and stopped joint-cutting; Otherwise continue coal body is cut;
6) whole hole: regulate globe valve 6, make pressure reduce to 0MPa, close rig, close the hydraulic pump pump.
The technique effect that the present invention obtains:
Compared with prior art, the present invention utilizes in hard coal layering, the roof and floor characteristics of easy pore-forming and cherry coal layering gas bearing capacity, be chosen in and creep into gas in hard coal layering, the roof and floor and take out the hole in advance, its length can meet the requirement that gas is taken out in advance, has avoided holing in the cherry coal layering occurring the problems such as hole, bit freezing of collapsing easily.Utilize the high-voltage pulse water jet to cut simultaneously and wear the hard coal layering to the cherry coal layering, forming a diameter in the cherry coal layering is the deep trouth of 1 ~ 2m, increased the exposed area of cherry coal layering, helping cherry coal layering gas gushes out, avoid that hole extraction scope is little, gas is taken out problems such as weak effect in advance because of the gas that bit freezing, the hole of collapsing, spray orifice cause is taken out in advance, reach the purpose that increase is taken out hole length in advance, improved gas permeability of coal seam simultaneously.And this technology adopts hydraulic pump to drilling rod, automatic switchover formula joint-cutting device and drill bit feed flow, highly pressurised liquid forms pulsing jet through nozzle, the impact grinding coal petrography, in hard layering or roof and floor, hole, in the hole, be ground into tiny coal grain subsequently under the effect of liquid and rotary drilling-head by the coal petrography of high-voltage pulse jet crushing and discharge boring with liquid in the hole, after boring is finished, from boring end, switch by automatic switchover formula joint-cutting device jet, the high-voltage pulse water jet that is produced by radial nozzles cuts coal body and meets, it has prolonged the cut drill life-span, drilling depth and speed have been improved, avoid bit freezing, collapse hole and prevent drill bit and coal petrography friction produces high temperature or spark and causes the gas combustion accident, it is particularly useful for the soft low air permeability coal seam in colliery and bores the pre-gas pumping of deep and long hole.
Description of drawings
Figure l is the binding schematic diagram of the embodiment of the invention 1 device.
Fig. 2 is the process chart of the embodiment of the invention 2.
Fig. 3 is that the embodiment of the invention 2 coal bed drillings are arranged front view.
Fig. 4 is that the embodiment of the invention 2 coal bed drillings are arranged sectional drawing.
Wherein, 1-fluid box, 2-hydraulic pump, 3-first pipeline, 4-overflow valve, 5-foot switch, 6-globe valve.The 7-pressure meter, 8-seals transfusion device, 9-rig, 10-high pressure sealing drilling rod, 11-automatic switchover formula joint-cutting device, 12-drill bit, 13-radial nozzles, the axial nozzle of 14-, the 15-pick, 16-second pipeline, 17-the 3rd pipeline, 18-handle, 19-roof, 20-seat earth, the 21-coal seam, 22-boring, 23-are the slit.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the present invention are described further.
Referring to Fig. 1, a kind of device that creeps into the profound gas pumping of weak seam hole along layer, it comprises fluid box 1, be connected with hydraulic pump 2 by pipeline on the fluid box, first pipeline 3 of hydraulic pump rear end is provided with switch 5, divides on the pipeline between hydraulic pump and the switch to be connected to second pipeline 16, second pipeline is provided with overflow valve 4, switch punishment is provided with the 3rd pipeline 17, the three pipelines and is provided with globe valve 6, and described second pipeline all is connected with fluid box with the 3rd pipeline.First pipeline of switch rear end is provided with sealing transfusion device 8, is provided with pressure meter 7 on first pipeline between switch and the sealing transfusion device.Sealing transfusion device rear end is connected with rig 9, described rig comprises the drill bit 12 of drilling rod 10 and drilling rod rear end, the drilling rod front end is connected with the sealing transfusion device, the drilling rod outside is provided with handle 18, be provided with automatic switchover formula joint-cutting device 11 between drilling rod and the drill bit, the drill bit afterbody is provided with axial nozzle 14, and the number of described axial nozzle is a plurality of, one of them is in bit central, and all the other are circle distribution at the drill bit periphery.Automatic switchover formula joint-cutting device is provided with radial nozzles 13 and pick 15.
Referring to Fig. 2-4, utilize the method for creeping into weak seam gas pumping hole along layer, it is in use in K1 coal seam, two lanes, Sichuan plum a strip of land between hills mine south, and this method is carried out as follows:
1) selects bore mode: investigate to analyze to execute and bore the place condition of coal seam occurrence,, be chosen in and creep in the hard layering, if hierarchical fuzzy is chosen in and creeps in the roof and floor along layer hole along layer hole if soft, hard layering layering is clear in the coal seam;
2) preparation of being correlated with before the boring: check the firm and sealing of each connecting line in the pre-gas pumping device of coal bed drilling, and rationally arrange the distance of hydraulic pump and job location, coal seam, primer fluid press pump pump, the working flow of regulator solution press pump 2 and pressure are respectively its nominal operation flow and rated operating pressure, close the overflow valve 4 on second pipeline 16, open the globe valve 6 on the 3rd pipeline 17, Closing Switch 5, liquid in the hydraulic fluid tank 1 is after hydraulic pump 2 pressurizations, a part flows back to hydraulic fluid tank through overflow valve, a part is through first pipeline 3 and switch 5, flow to drilling rod 10, the liquid that flows to drilling rod 10 flows out by axial nozzle 14 outflows of drill bit 12 and/or the radial nozzles 13 in the automatic switchover formula joint-cutting device 11;
3) rig advances, holes: start rig 9, regulate globe valve 6, control pump is pressed in left and right sides 5MPa, close the radial nozzles 13 of automatic switchover formula joint-cutting device 11, open the axial nozzle 14 of drill bit 12, highly pressurised liquid enters sealing transfusion device 8 through first pipeline 3, again by drilling rod 10, highly pressurised liquid is assisted through axial nozzle 14 formation pulsing jets impact coal bodies and is crept into, when needs are changed drilling rod, and trip switch, stopping rig advancing, rotates, unload lower seal transfusion device 8, add a new drilling rod 10, repeat successively;
4) judge whether rig continues to creep into:, then continue repeating step 3) if drilling depth does not reach desired depth; When drilling depth reaches desired depth or boring and passes whole coal seam, stop to creep into;
5) coal body is carried out slot: creep into when finishing, maintained switch 5 is in closure state, regulate globe valve 6, control pump is pressed in 25 ~ 30MPa, the radial nozzles 13 of formula joint-cutting device 11 of automaticallying switch this moment is opened, the axial nozzle 14 of drill bit 12 is closed, highly pressurised liquid forms pulsing jet through radial nozzles, rotary drill rod 10, begin coal body is cut, the pick 15 on the automatic switchover formula joint-cutting device 11 will cut to be come to the bulk coal cinder to grind to form diameter is that the fine particle of 0.1 ~ 5mm is discharged smoothly with backwater;
5) judge whether to need to continue slot: limpid in the slot process if occur returning water in the boring, no cinder returns out, can illustrate that then slot finishes, trip switch 5, unload lower seal transfusion device 8, unload many drilling rods 10, will remain drilling rod again and be connected with sealing transfusion device (8), Closing Switch 5 is carried out the cutting of another seam to coal body; Cinder continues to occur in the liquid if return in the slot, but the slot time surpass one hour, can think that slot finishes this moment, and prepare next bar slit is cut, circulate successively and take out the terminal 5m of pipe place in advance until distance gas, stop joint-cutting; Otherwise continue coal body is cut;
6) whole hole: regulate globe valve 6, make pressure reduce to 0MPa, close rig, close the hydraulic pump pump.
The present invention utilizes in hard coal layering, the roof and floor characteristics of easy pore-forming and cherry coal layering gas bearing capacity, in hard coal layering, roof and floor, creep into gas and take out the hole in advance, its length can meet the requirement that gas is taken out in advance, utilize the high-voltage pulse liquid jet to cut then and wear the hard coal layering to the cherry coal layering, forming a diameter in the cherry coal layering is the deep trouth of 1 ~ 2m, increased the exposed area of cherry coal layering, helped cherry coal layering gas and gush out.Axial nozzle in drilling process on the drill bit can produce the pulsing jet broken coal, creep into pilot hole, cutting tool on the drill bit further grinds cinder and pilot hole is enlarged, more traditional hard coal layering drilling process, improved rate of penetration, reduced the loss of drill bit, improve the application life of cut drill greatly.Begin coal body is carried out slot to prescribed depth when holing, the pulsing jet that highly pressurised liquid produces by the radial nozzles on the automatic switchover formula joint-cutting device also acts on coal body, coal body is carried out joint-cutting, cut the bulk coal cinder that falls and ground to form tiny particle by pick, and with outside the liquid tap, this has just improved the smoothness of deslagging, and has played the effect of depositing dust, has improved the operating environment of job site simultaneously.
The present invention shows in the applicable cases in plum a strip of land between hills colliery, Sichuan, and in roof and coal seam layering place boring, it is thick entirely to penetrate the coal seam substantially, and average hole depth is 138.2m, is 2.7 times of former technology; Average hundred meters boring gas drainage under suction amounts are 1.872 m/min, are 7.2 times of former technology; Average single hole gas density is 66.8%, is 3.5 times of former technology, and gas permeability of coal seam and gas pumping rate have obtained effective raising.
Protection scope of the present invention is not limited to the above embodiments, and obviously, those skilled in the art can carry out various changes and distortion and do not depart from the scope of the present invention and spirit the present invention.If these changes and distortion belong in the scope of claim of the present invention and equivalent technologies thereof, then the intent of the present invention also comprises these changes and is out of shape interior.
Claims (5)
1. one kind is crept into the device in the profound gas pumping of weak seam hole along layer, it is characterized in that: it comprises fluid box (1), be connected with hydraulic pump (2) by pipeline on the fluid box, first pipeline (3) of hydraulic pump rear end is provided with switch (5), divide on the pipeline between hydraulic pump and the switch (5) and be connected to second pipeline (16), second pipeline (16) is provided with overflow valve (4), switch punishment is provided with the 3rd pipeline (17), the 3rd pipeline (17) is provided with globe valve (6), first pipeline (3) of switch rear end is provided with sealing transfusion device (8), sealing transfusion device (8) rear end is connected with rig (9), described rig comprises the drill bit (12) of drilling rod (10) and drilling rod rear end, the drilling rod front end is connected with sealing transfusion device (8), the drilling rod outside is provided with handle (18), be provided with automatic switchover formula joint-cutting device (11) between drilling rod and the drill bit, the drill bit afterbody is provided with axial nozzle (14), and automatic switchover formula joint-cutting device (11) is provided with radial nozzles (13) and pick (15).
2. suitable layer according to claim 1 creeps into the device in the profound gas pumping of weak seam hole, it is characterized in that: be provided with pressure meter (7) on first pipeline (3) between switch (5) and the sealing transfusion device (8).
3. creep into the device in the profound gas pumping of weak seam hole according to the described suitable layer of claim 1-2, it is characterized in that: the number of described axial nozzle (14) is a plurality of, and one of them is in bit central, and all the other are circle distribution at the drill bit periphery.
4. creep into the device in the profound gas pumping of weak seam hole according to the described suitable layer of claim 1-2, it is characterized in that: described second pipeline (16) all is connected with fluid box (1) with the 3rd pipeline (17).
5. utilize the described device of the arbitrary claim of claim 1-4 to carry out creeping into along layer the method in the profound gas pumping of weak seam hole, it is characterized in that: this method is carried out as follows:
1) selects bore mode: investigate to analyze to execute and bore the place condition of coal seam occurrence, if soft, hard layering layering is clear in the coal seam, described soft layering mostly is powder coal-full fine coal, hard layering mostly is non-destruction coal-destruction coal, be chosen in and creep in the hard layering along layer hole, if hierarchical fuzzy is chosen in and creeps in the roof and floor along layer hole;
2) the preceding relevant preparation of boring: check the firm and sealing of creeping into each connecting line in the profound gas pumping aperture apparatus of weak seam along layer, and rationally arrange the distance of hydraulic pump and job location, coal seam, the primer fluid press pump, the working flow of regulator solution press pump (2) and pressure are respectively its nominal operation flow and rated operating pressure, close the overflow valve (4) on second pipeline (16), open the globe valve (6) on the 3rd pipeline (17), Closing Switch (5), liquid in the hydraulic fluid tank (1) is after hydraulic pump (2) pressurization, a part flows back to hydraulic fluid tank through overflow valve, a part is through first pipeline (3) and switch (5), flow to drilling rod (10), the liquid that flows to drilling rod (10) flows out by axial nozzle (14) outflow of drill bit (12) and/or the radial nozzles (13) in the automatic switchover formula joint-cutting device (11);
3) rig advances, boring: start rig (9), regulate globe valve (6), control pump is pressed in about 5MPa, close the radial nozzles (13) of automatic switchover formula joint-cutting device (11), open the axial nozzle (14) of drill bit (12), highly pressurised liquid enters sealing transfusion device (8) through first pipeline (3), again by drilling rod (10), highly pressurised liquid is assisted through axial nozzle (14) formation pulsing jet impact coal body and is crept into, when needs are changed drilling rod, and trip switch, stopping rig advancing, rotation, unload lower seal transfusion device (8), add a new drilling rod (10), repeat successively;
4) judge whether rig continues to creep into:, then continue repeating step 3) if drilling depth does not reach desired depth; When drilling depth reaches desired depth or boring and passes whole coal seam, stop to creep into;
5) coal body is carried out slot: creep into when finishing, maintained switch (5) is in closure state, regulate globe valve (6), control pump is pressed in 25 ~ 30MPa, the radial nozzles (13) of formula joint-cutting device (11) of automaticallying switch this moment is opened, the axial nozzle (14) of drill bit (12) is closed, highly pressurised liquid forms pulsing jet through radial nozzles, rotary drill rod (10), begin coal body is cut, pick (15) on the automatic switchover formula joint-cutting device (11) will cut to be come to the bulk coal cinder to grind to form diameter is that the fine particle of 0.1 ~ 5mm is discharged smoothly with backwater, after slot is finished, according to the coal seam and the different of angle of holing, can form diameter in the coal seam be the deep trouth of 1 ~ 2m;
6) judge whether to need to continue slot: limpid in the slot process if occur returning water in the boring, no cinder returns out, can illustrate that then slot finishes, trip switch (5), unload lower seal transfusion device (8), unload many drilling rods (10), will remain drilling rod again and be connected with sealing transfusion device (8), Closing Switch (5) is carried out the cutting of another seam to coal body; Cinder continues to occur in the liquid if return in the slot, but the slot time surpass one hour, can think that slot finishes this moment, and prepare next bar slit is cut that circulation is according to this taken out the terminal 5m of pipe place in advance until distance gas and stopped joint-cutting; Otherwise continue coal body is cut;
7) whole hole: regulate globe valve (6), make pressure reduce to 0MPa, close rig, close emulsification pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201010512993 CN101975023B (en) | 2010-10-20 | 2010-10-20 | Method and device for drilling deep and long gas drainage hole in soft coal seam along layers |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010512993 CN101975023B (en) | 2010-10-20 | 2010-10-20 | Method and device for drilling deep and long gas drainage hole in soft coal seam along layers |
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| CN101975023A true CN101975023A (en) | 2011-02-16 |
| CN101975023B CN101975023B (en) | 2013-02-20 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748065A (en) * | 2012-07-30 | 2012-10-24 | 武汉大学 | Method for extracting gas of blank zone of working face with large mining length |
| CN104563871A (en) * | 2015-01-15 | 2015-04-29 | 河南理工大学 | Hydraulic punching, dredging and slag discharge integrated device and method |
| CN108763781A (en) * | 2018-05-31 | 2018-11-06 | 中煤科工集团重庆研究院有限公司 | Method for judging blank zone of gas outburst prevention measure of pre-pumping coal seam |
| CN109707371A (en) * | 2018-11-19 | 2019-05-03 | 太原理工大学 | A kind of quickly measurement coal bed drilling depth mechanism and method |
| CN113062763A (en) * | 2021-05-07 | 2021-07-02 | 重庆工程职业技术学院 | Gas extraction device and method for preventing coal and gas outburst |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2731170A1 (en) * | 1977-07-09 | 1979-01-25 | Preussag Ag | Exploratory underground drilling equipment - has boring head mounted on telescopic tube with inner tubes forming hydraulic chambers |
| CN101117893A (en) * | 2007-09-07 | 2008-02-06 | 重庆大学 | Coal bed gas drainage method and device |
| CN101413380A (en) * | 2008-11-20 | 2009-04-22 | 重庆大学 | Multifunctional self-oscillation flow jet flow drill |
| CN201826748U (en) * | 2010-10-20 | 2011-05-11 | 重庆大学 | Device for drilling deep and long gas drainage hole on soft coal seam in bedding way |
-
2010
- 2010-10-20 CN CN 201010512993 patent/CN101975023B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2731170A1 (en) * | 1977-07-09 | 1979-01-25 | Preussag Ag | Exploratory underground drilling equipment - has boring head mounted on telescopic tube with inner tubes forming hydraulic chambers |
| CN101117893A (en) * | 2007-09-07 | 2008-02-06 | 重庆大学 | Coal bed gas drainage method and device |
| CN101413380A (en) * | 2008-11-20 | 2009-04-22 | 重庆大学 | Multifunctional self-oscillation flow jet flow drill |
| CN201826748U (en) * | 2010-10-20 | 2011-05-11 | 重庆大学 | Device for drilling deep and long gas drainage hole on soft coal seam in bedding way |
Non-Patent Citations (1)
| Title |
|---|
| 《煤炭学报》 20100731 刘勇等 高压脉冲水射流顶底板钻孔提高煤层瓦斯抽采率的应用研究 第35卷, 第7期 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748065A (en) * | 2012-07-30 | 2012-10-24 | 武汉大学 | Method for extracting gas of blank zone of working face with large mining length |
| CN104563871A (en) * | 2015-01-15 | 2015-04-29 | 河南理工大学 | Hydraulic punching, dredging and slag discharge integrated device and method |
| CN104563871B (en) * | 2015-01-15 | 2016-09-21 | 河南理工大学 | A kind of hydraulic flushing in hole, desilting and deslagging integrated apparatus and method |
| CN108763781A (en) * | 2018-05-31 | 2018-11-06 | 中煤科工集团重庆研究院有限公司 | Method for judging blank zone of gas outburst prevention measure of pre-pumping coal seam |
| CN108763781B (en) * | 2018-05-31 | 2022-04-05 | 中煤科工集团重庆研究院有限公司 | Method for judging blank zone of gas outburst prevention measure of pre-pumping coal seam |
| CN109707371A (en) * | 2018-11-19 | 2019-05-03 | 太原理工大学 | A kind of quickly measurement coal bed drilling depth mechanism and method |
| CN113062763A (en) * | 2021-05-07 | 2021-07-02 | 重庆工程职业技术学院 | Gas extraction device and method for preventing coal and gas outburst |
| CN113062763B (en) * | 2021-05-07 | 2022-05-20 | 重庆工程职业技术学院 | Gas extraction device and method for preventing coal and gas outburst |
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| Publication number | Publication date |
|---|---|
| CN101975023B (en) | 2013-02-20 |
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