CN108301807A - Hole wall fixing device and construction method for weak seam mash gas pumping drilling - Google Patents
Hole wall fixing device and construction method for weak seam mash gas pumping drilling Download PDFInfo
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- CN108301807A CN108301807A CN201810377317.5A CN201810377317A CN108301807A CN 108301807 A CN108301807 A CN 108301807A CN 201810377317 A CN201810377317 A CN 201810377317A CN 108301807 A CN108301807 A CN 108301807A
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- 238000005553 drilling Methods 0.000 title claims abstract description 122
- 238000010276 construction Methods 0.000 title claims abstract description 26
- 238000005086 pumping Methods 0.000 title claims abstract description 26
- 239000003245 coal Substances 0.000 claims abstract description 44
- 239000007788 liquid Substances 0.000 claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 29
- 239000000654 additive Substances 0.000 claims abstract description 6
- 230000000996 additive effect Effects 0.000 claims abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 6
- 239000004411 aluminium Substances 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 4
- 239000004568 cement Substances 0.000 claims abstract description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 31
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 8
- 238000009530 blood pressure measurement Methods 0.000 claims description 7
- 238000000605 extraction Methods 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 7
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 2
- 239000011575 calcium Substances 0.000 claims description 2
- 229910052791 calcium Inorganic materials 0.000 claims description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 2
- 239000000292 calcium oxide Substances 0.000 claims description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 2
- UFLSLGGVXPPUDQ-UHFFFAOYSA-N dicalcium oxygen(2-) Chemical compound [O--].[O--].[Ca++].[Ca++] UFLSLGGVXPPUDQ-UHFFFAOYSA-N 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 239000003292 glue Substances 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 9
- 239000000243 solution Substances 0.000 description 5
- 230000006641 stabilisation Effects 0.000 description 5
- 238000011105 stabilization Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 238000007569 slipcasting Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 241000721047 Danaus plexippus Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
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Classifications
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- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention belongs to technical field of mine safety,It is related to a kind of hole wall fixing device and construction method for weak seam mash gas pumping drilling,Include the hollow drill pipe for being inserted into coal seam and the drill bit mounted on drilling rod front end,The middle and back of drilling rod is arranged with hole packer,Hole packer Grouting Pipe is connected on hole packer,The rear end of drilling rod is equipped with the high-pressure rotary water tail communicated with drilling rod,It is connected with high-pressure rubber pipe on high-pressure rotary water tail,Reinforcing liquid is placed in high-pressure rubber pipe,It reinforces when liquid penetrates into coal seam less than in 0.1mm and narrower crack and solidifies at once,It is that ash and water are mixed according to 1: 1 ratio to reinforce liquid,Wherein ash composition is cement 85~90%,Aluminium base additive 0.9~1.1%,Sodium silicate 9~11%,Collapse hole is serious during solving the problems, such as weak seam mash gas pumping drilling in the prior art.
Description
Technical field
The invention belongs to technical field of mine safety, it is related to a kind of hole wall for weak seam mash gas pumping drilling and fixes
Device and construction method.
Background technology
95% or more high methane of China and projecting mine belong to low air permeability coal seam, and coal quality is soft, and gas bearing capacity is big.Underground
All kinds of long range horizontal drilling mash gas extractions play in mine disaster is prevented, gas resources develop and use and environmental protection
Important function, rationally efficiently mash gas extraction can greatly solve the problems, such as mine safety production, alleviate energy supply and demand anxiety
Situation.It is influenced by borehole stability difference factor, soft high gas layer gas control difficulty is big, therefore studies weak seam and bore
Hole control instability method is even more important, and presently disclosed method has two classes：After hole wall stabilization technique and pore-forming in drilling process
Hole wall stabilization technique.Hole wall stabilization technique after pore-forming, the hole wall that can also be taken into account in drilling process are stablized.Hole after pore-forming
Wall stabilization technique state of development at this stage and brief protocol mainly have following several：
Screen casing guard aperture is inserted into the drilling of pore-forming, country's experiment is that coal industry western horse coal mine in Shenyang imitates doctor earlier
Field bypass surgery method, i.e., screen casing is sent into hole by artificial work after pore-forming, and this method is just touched sending the pipe stage into hole
To larger problem, mainly hole wall most cases are imperfect, are easy card pipe, are generally sent to 20m and just can't get into, effect is undesirable
(Xu Qingwu, kingdom monarch, Dong Li etc..Firedamp taking-out discharging drilling guard aperture Discussion on Technology.Safety of coal mines, 2007 (1) 39-40).This method
The shortcomings that be frequent card resistance during sending pipe into drilling, 20m is at most sent into, even if adding directive wheel at most only to pipe front end
It is sent into 50m, and construction is more difficult, cost is higher, can not achieve the desired results after sealing of hole.
Sian Branch Of China Coal Research Institute have developed a kind of soft projecting coal bed middle wind pressure air drilling technique and
Relevant equipment.It does not pull out of hole when drill bit gets into whole Kong Houxian from aperture, guard aperture screen casing is sent by drill pipe bore, is pulled out of hole later.
Guard aperture screen casing is stayed in across the openable drill bit of inner core in hole.The technology has carried out field test in mining areas such as the Huaibei, Huainan
(Yin Xinsheng, all east, Yao Ke etc..Soft projecting coal bed middle wind pressure air drilling technique and relevant equipment.Coal science and technology.
2009(09)72-74).Although screen casing can be sent into bottom hole by this method, due to being from drilling rod inner lower tube, the smaller screen number of caliber
Measure limited, extracting result is undesirable.
Hunan Province coal Science Insitute has developed drawing type setting of casing method and apparatus, i.e., in serious spray orifice area using set
Pipe follow-up hole forming method.Drilling rod cannot be retracted after follow-up hole to there is serious spray orifice drilling rod in drilling construction, change the outfit and turn in aperture
To expansion bit and casing, drilling rod and casing manually are sent into hole end simultaneously directly into drilling.Again drilling machine is imported, is continued
Slow uniform drilling well, ratchet is inwardly dragged by drill bit drilling well on the pipe sleeve that casing passes through drilling rod, and institute's setting of casing is dragged mounted in spray orifice
Position guard aperture.Drilling complete casing guard aperture after, operate drilling rod retraction, ratchet reset, leave casing, theoretically drill bit can continue to
Deep drilling well.It drills after the completion of serious spray orifice section retaining wall work, special expansion bit is exited across casing with drilling rod after reducing
Drilling, casing, which is retained, continues retaining wall (Zhou Songyuan, Zhao Jun, Liu Xue clothes etc. in hole.Serious spray orifice weak seam pore-forming technique and equipment
Research.2011 (04) 11-16 of University Of Science and Technology Of Hunan's journal (natural science edition)).This method site technique is complicated, cumbersome,
Do not have practical reference value.
Lu Yiyu etc. discloses a kind of coal mine gas drainage holes scouring bit, hole cleaning device and borehole cleaning method.The party
Method makes collapse hole accumulation coal body smash into particle for collapse hole section coal body using the method for water jet, then uses jet stream high pressure water flow will
Particle is taken away, then in collapse hole segment sync tripping in gas pumping screen casing (Lu Yiyu, Tang Jiren, Zhang Xinwei etc..A kind of underground coal mine
Gas pumping hole scouring bit, hole cleaning device and borehole cleaning method, 2014).This method is hydraulic flushing in hole, be easy to cause large area and collapses
The additional accident such as hole, plug-hole, does not have promotional value.
Lin Baiquan, Yao Xiangrong, Jiang Chenglin and Zhai at etc. successively test technology to boring grouting reinforcing hole wall, will be certain
The slurries or curing agent of pressure are injected into drilling, using in its own pressure permeation to drilling surrounding crack, are artificially improved
Drilling coffer mechanics intensity (Yao Xiangrong, Shi Biming, Wang Yongbao etc..In the weak structure coal petrography of deep mash gas pumping drilling slip casting at
Hole technology, coal science and technology, 2010 (06) 67-70).This method grouting pressure is smaller, and slurries depth of penetration is inadequate, it is not easy to
Firm hole wall is formed, and needs disposable slip casting success after pore-forming, it cannot be preferable for the collapse hole phenomenon of drilling process
Control.Foreign countries are less to the research of soft high gas layer, and the mode for being inserted into screen casing into drilling is mainly taken to control collapse hole.
The present invention can solve the technical problem of the hole wall stabilization after extraction borehole pore-forming, if collapse hole is tight in drilling process
Weight, can take segmentation reinforce measure, for take the anti-reflection measure extraction borehole of waterpowerization, gas bearing capacity measure drilling, watt
The case where this piezometry drilling etc. is difficult to pore-forming can be with effective solution.
Invention content
In view of this, the present invention is serious in order to solve collapse hole during weak seam drilling well for gas drainage in the prior art
Problem provides a kind of hole wall fixing device and construction method for weak seam mash gas pumping drilling.
In order to achieve the above objectives, it is solid to provide a kind of hole wall for soft coal bed in coal mine mash gas pumping drilling by the present invention
Determine device, include the hollow drill pipe for being inserted into coal seam and the drill bit mounted on drilling rod front end, the middle and back of drilling rod is arranged with envelope
Hole device is connected with hole packer Grouting Pipe on hole packer, and the rear end of drilling rod is equipped with the high-pressure rotary water tail communicated with drilling rod, high pressure
It is connected with high-pressure rubber pipe on rotation water tail, reinforcing liquid is placed in high-pressure rubber pipe, liquid is reinforced and penetrates into coal seam less than 0.1mm
And solidified at once when in narrower crack, it is that ash and water are mixed according to 1: 1 ratio to reinforce liquid, and wherein ash composition is cement
85~90%, aluminium base additive 0.9~1.1%, sodium silicate 9~11%.
Further, it is mounted on force (forcing) pump on hole packer Grouting Pipe and high-pressure rotary water tail.
Further, aluminium base additive plays expansion, is three kinds of calcium oxide, calcium sulphoaluminate and calcium oxide-calcium sulphoaluminate objects
Any one in matter.
Further, the front end of drill bit is uniformly provided with several spray holes.
A kind of construction method of hole wall fixing device for weak seam mash gas pumping drilling, includes the following steps：
A, the coal seam spudded in will be needed using the drill bit of the larger-diameter drill bit drilling coal seam 10m backed off after random diameter, more
It changes into and meets the drill bit of design bore diameter and apply brills, the large diameter borehole section of this section of aperture 10m is used to install hole packer, wait for
When drilling construction to projected depth, hole packer is installed at once in the middle and back of drilling rod；
B, the force (forcing) pump in hole packer Grouting Pipe is opened, by the hole packer Grouting Pipe that is connected on hole packer into hole packer
The water for injecting 6~8MPa carries out sealing of hole；
C, behind aperture all closing, the force (forcing) pump on high-pressure rotary water tail is opened, the high-pressure rotary of drilling rod tail end is passed through
Water tail and high-pressure rubber pipe are injected into hole reinforces liquid, and the injection pressure for reinforcing liquid is 3~5MPa, is reinforcing liquid injection stream
After amount goes to zero and stablizes 5~10min, hole packer pressure release is removed；
D, hole packer remove after i.e. into hole injected clear water with rinse in drilling rod reinforce liquid and drilling in reinforcing liquid；
E, drilling is reinforced and is terminated, you can carries out the anti-reflection measure of waterpowerization or the subsequent operations such as content are surveyed in pressure measurement.
Further, hole packer and drilling rod are separate structure, and hole packer does not influence the construction of drill bit on drilling rod.
Further, liquid pressing is reinforced using same force (forcing) pump in water pressurization and high-pressure rubber pipe in hole packer.
Further, which is suitable for being segmented multiple reinforcing during coal-bed gas Completion of Drilling Hole, i.e. step D terminates
The reinforcing for the drilling first stage terminates afterwards, after the drilling first stage reinforces, repeats step A~step D up to drilling is applied
Work is to projected depth, you can carries out the anti-reflection measure of waterpowerization or the subsequent operations such as content are surveyed in pressure measurement.
The beneficial effects of the present invention are：
1, the hole wall fixing device disclosed in this invention for weak seam mash gas pumping drilling, drill bit are taken with drilling rod
It is threadedly coupled, the parts 8~10m of aperture carry out reaming using reaming bit, so that hole packer is entered, hole packer is sleeved on drilling rod
On；Brill hole to be drilled of applying terminates, and hole packer is sleeved on the drilling rod of bore portions, is injected into hole packer by hole packer Grouting Pipe
Then the orifice sealing of drilling is reinforced liquid by the water of 8MPa pressure by being injected in high-pressure rubber pipe and high-pressure rotary water Caudad hole
Body, reinforcing hydraulic coupling are 5Mpa, are fixed drilling by reinforcing liquid.It is a kind of non-in steel or rubber etc. wherein to reinforce liquid
The liquid for not solidifying in the container of coal substance, but instantaneously being solidified in the 0.1mm in coal seam grades or smaller crack, should
The hole wall after pore-forming can be stablized by reinforcing in liquid injection hole, prevent the collapse hole phenomenon after drilling from occurring, and reinforce liquid
Concocting method it is simple, strong applicability, suitable for being widely popularized.
2, the construction method of the hole wall fixing device disclosed in this invention for weak seam mash gas pumping drilling, can be with
The technical problem that hole wall is stablized after solution extraction borehole pore-forming can take segmentation to reinforce if collapse hole is serious in drilling process
Measure.So that the anti-reflection measure extraction borehole of waterpowerization, gas bearing capacity measure drilling, gas pressure measurement drilling etc. and are difficult to pore-forming
The case where can be with effective solution.
3, the construction method of the hole wall fixing device disclosed in this invention for weak seam mash gas pumping drilling, effectively
Solve constructional difficulties of the existing technology, complex process, fall flat, cause additional accident, hole wall firm
Effect difference and cannot be segmented with beat with it is solid the problems such as.
Description of the drawings
In order to keep the purpose of the present invention, technical solution and advantageous effect clearer, the present invention provides following attached drawing and carries out
Explanation：
Fig. 1 is structural representation of the present invention for the hole wall fixing device of soft coal bed in coal mine mash gas pumping drilling
Figure.
Specific implementation mode
Below in conjunction with attached drawing, the preferred embodiment of the present invention is described in detail.
Reference numeral in Figure of description includes：
Coal seam 1, drill bit 2, drilling rod 3, hole packer 4, hole packer Grouting Pipe 5, high-pressure rotary water tail 6, high-pressure rubber pipe 7.
Hole wall fixing device for soft coal bed in coal mine mash gas pumping drilling as shown in Figure 1, including be used to insert
Entering the hollow drill pipe 3 in coal seam 1 and the drill bit 2 mounted on 3 front end of drilling rod, drill bit 2 is taken with drilling rod 3 and is threadedly coupled, aperture 8~
The parts 10m carry out reaming using reaming bit 2, and the hole packer 4 of 3 middle and back of drilling rod is enable to enter drilling, the pressure foot of 5MPa
The residual in 2 hole of drill bit to be reinforced in liquid indentation coal body.The middle and back of drilling rod 3 is arranged with hole packer 4, hole packer 4 and brill
Bar 3 is separate structure, and hole packer 4 does not influence the construction of drill bit 2 on drilling rod 3.The hole packer with force (forcing) pump is connected on hole packer 4
4 Grouting Pipes, the rear end of drilling rod 3 are equipped with the high-pressure rotary water tail 6 with force (forcing) pump communicated with drilling rod 3, on high-pressure rotary water tail 6
It is connected with high-pressure rubber pipe 7, reinforcing liquid is placed in high-pressure rubber pipe 7, reinforcing liquid is one kind in the non-coal object such as steel or rubber
The liquid for not solidifying in the container of matter, but instantaneously being solidified in the 0.1mm in coal seam 1 grades or smaller crack is reinforced
Liquid be ash and water according to 1: 1 ratio mix, wherein ash composition be cement 85~90%, aluminium base additive 0.9~
1.1%, sodium silicate 9~11%.
Embodiment 1
It is disposably reinforced after pore-forming
A kind of construction method of hole wall fixing device for 1 mash gas pumping drilling of weak seam, includes the following steps：
A, the coal seam 1 spudded in will be needed to creep into the drill bit 2 of the coal seam 10m backed off after random diameter using larger-diameter drill bit 2,
It is replaced with and meets the drill bit 2 of design bore diameter and apply brills, the large diameter borehole section of this section of aperture 10m is used to install hole packer
4, when construction hole to be drilled is to projected depth, hole packer 4 is installed at once in the middle and back of drilling rod 3；
B, the force (forcing) pump in 4 Grouting Pipe of hole packer is opened, by 4 Grouting Pipe of hole packer that is connected on hole packer 4 to sealing of hole
The water of injection 8MPa carries out sealing of hole in device 4；
C, behind aperture all closing, the force (forcing) pump on high-pressure rotary water tail 6 is opened, is revolved by the high pressure of 3 tail end of drilling rod
Turn water tail 6 and high-pressure rubber pipe 7 and inject reinforcing liquid into hole, the injection pressure for reinforcing liquid is 5MPa, is reinforcing liquid injection
After flow goes to zero and stablizes 5~10min, 4 pressure release of hole packer is removed；
D, hole packer 4 remove after i.e. into hole injected clear water with rinse in drilling rod 3 reinforce liquid and drilling in reinforcing liquid
Body；
E, drilling is reinforced and is terminated, you can carries out the anti-reflection measure of waterpowerization or the subsequent operations such as content are surveyed in pressure measurement.
Embodiment 2
It is segmented in pore forming process and repeatedly reinforces
A kind of construction method of hole wall fixing device for 1 mash gas pumping drilling of weak seam, includes the following steps：
A, the coal seam 1 spudded in will be needed to creep into the drill bit 2 of the coal seam 10m backed off after random diameter using larger-diameter drill bit 2,
It is replaced with and meets the drill bit 2 of design bore diameter and apply brills, the large diameter borehole section of this section of aperture 10m is used to install hole packer
4, when construction hole to be drilled is to projected depth, hole packer 4 is installed at once in the middle and back of drilling rod 3；
B, the force (forcing) pump in 4 Grouting Pipe of hole packer is opened, by 4 Grouting Pipe of hole packer that is connected on hole packer 4 to sealing of hole
The water of injection 8MPa carries out sealing of hole in device 4；
C, behind aperture all closing, the force (forcing) pump on high-pressure rotary water tail 6 is opened, is revolved by the high pressure of 3 tail end of drilling rod
Turn water tail 6 and high-pressure rubber pipe 7 and inject reinforcing liquid into hole, the injection pressure for reinforcing liquid is 5MPa, is reinforcing liquid injection
After flow goes to zero and stablizes 5~10min, 4 pressure release of hole packer is removed；
D, hole packer 4 remove after i.e. into hole injected clear water with rinse in drilling rod 3 reinforce liquid and drilling in reinforcing liquid
Body；
E, after the reinforcing of drilling first stage, step A~step D is repeated up to drilling construction to projected depth, you can
It carries out the anti-reflection measure of waterpowerization or the subsequent operations such as content is surveyed in pressure measurement.
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical
It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (8)
1. the hole wall fixing device for weak seam mash gas pumping drilling, which is characterized in that include for being inserted into coal seam
Empty drilling rod and drill bit mounted on drilling rod front end, the middle and back of drilling rod are arranged with hole packer, and hole packer note is connected on hole packer
Slurry pipe, the rear end of drilling rod is equipped with the high-pressure rotary water tail communicated with drilling rod, high-pressure glue is connected on the high-pressure rotary water tail
It manages, reinforcing liquid is placed in the high-pressure rubber pipe, the reinforcing liquid, which penetrates into coal seam, to be less than in 0.1mm and narrower crack
When solidify at once, it is described reinforce liquid be ash and water according to 1: 1 ratio mix, wherein ash composition be cement 85~90%,
Aluminium base additive 0.9~1.1%, sodium silicate 9~11%.
2. being used for the hole wall fixing device of weak seam mash gas pumping drilling as described in claim 1, which is characterized in that described
It is mounted on force (forcing) pump on hole packer Grouting Pipe and high-pressure rotary water tail.
3. being used for the hole wall fixing device of weak seam mash gas pumping drilling as claimed in claim 2, which is characterized in that described
Aluminium base additive plays expansion, for any one in three kinds of calcium oxide, calcium sulphoaluminate and calcium oxide-calcium sulphoaluminate substances.
4. being used for the hole wall fixing device of weak seam mash gas pumping drilling as claimed in claim 3, which is characterized in that described
The front end of drill bit is uniformly provided with several spray holes.
5. the construction party based on any hole wall fixing device for weak seam mash gas pumping drilling of Claims 1 to 4
Method, which is characterized in that include the following steps：
A, the coal seam spudded in will be needed using the drill bit of the larger-diameter drill bit drilling coal seam 10m backed off after random diameter, be replaced with
The drill bit for meeting design bore diameter carries out applying brill, the large diameter borehole section of this section of aperture 10m is hole to be drilled for installing hole packer
When construction is to projected depth, hole packer is installed at once in the middle and back of drilling rod；
B, the force (forcing) pump in hole packer Grouting Pipe is opened, is injected into hole packer by the hole packer Grouting Pipe connected on hole packer
The water of 6~8MPa carries out sealing of hole；
C, behind aperture all closing, the force (forcing) pump on high-pressure rotary water tail is opened, the high-pressure rotary water tail of drilling rod tail end is passed through
It is injected into hole with high-pressure rubber pipe and reinforces liquid, the injection pressure for reinforcing liquid is 3~5MPa, is become reinforcing liquid injection flow
In zero and after stablizing 5~10min, hole packer pressure release is removed；
D, hole packer remove after i.e. into hole injected clear water with rinse in drilling rod reinforce liquid and drilling in reinforcing liquid；
E, drilling is reinforced and is terminated, you can carries out the anti-reflection measure of waterpowerization or the subsequent operations such as content are surveyed in pressure measurement.
6. the construction method for the hole wall fixing device of weak seam mash gas pumping drilling as claimed in claim 5, special
Sign is that the hole packer and drilling rod are separate structure, and hole packer does not influence the construction of drill bit on drilling rod.
7. the construction method for the hole wall fixing device of weak seam mash gas pumping drilling as claimed in claim 6, special
Sign is, liquid pressing is reinforced using same force (forcing) pump in water pressurization and high-pressure rubber pipe in the hole packer.
8. the construction method for the hole wall fixing device of weak seam mash gas pumping drilling as claimed in claim 7, special
Sign is that the construction method is suitable for being segmented repeatedly reinforcing during coal bed gas extraction Completion of Drilling Hole, i.e. is after step D
Drilling the first stage reinforcing terminate, drilling the first stage reinforce after, repeat step A~step D until drilling construction extremely
Projected depth, you can carry out the anti-reflection measure of waterpowerization or the subsequent operations such as content are surveyed in pressure measurement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810377317.5A CN108301807B (en) | 2018-04-24 | 2018-04-24 | Hole wall fixing device for gas extraction drill hole of soft coal seam and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810377317.5A CN108301807B (en) | 2018-04-24 | 2018-04-24 | Hole wall fixing device for gas extraction drill hole of soft coal seam and construction method |
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| Publication Number | Publication Date |
|---|---|
| CN108301807A true CN108301807A (en) | 2018-07-20 |
| CN108301807B CN108301807B (en) | 2020-01-24 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630181A (en) * | 2019-08-27 | 2019-12-31 | 中国矿业大学 | Coal seam reaming and permeability increasing method utilizing pneumatic coupling effect |
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| CN111734345A (en) * | 2020-07-09 | 2020-10-02 | 重庆大学 | Hole drilling and protecting method for soft coal seam based on electrorheological effect |
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| CN110671042A (en) * | 2019-10-14 | 2020-01-10 | 中煤新集能源股份有限公司 | Construction method of fire prevention and extinguishing drill hole casing |
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| CN110821430B (en) * | 2019-11-25 | 2022-07-29 | 中铁十九局集团矿业投资有限公司 | Fixing device for drilling camera hole opening and mounting method |
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| CN111734345B (en) * | 2020-07-09 | 2022-05-17 | 重庆大学 | Hole drilling and protecting method for soft coal seam based on electrorheological effect |
| CN112343659A (en) * | 2020-08-04 | 2021-02-09 | 煤科集团沈阳研究院有限公司 | Coal rock coal directional cross-layer drilling coal seam gas pressure measuring method |
| CN112160728A (en) * | 2020-09-02 | 2021-01-01 | 中煤科工集团西安研究院有限公司 | Treatment method for mine water exploration and drainage drill hole |
| CN111927456A (en) * | 2020-09-10 | 2020-11-13 | 山东科技大学 | Dynamic-loading deep mining area coal pillar instability unloading-fixing-letting multistage prevention and control method |
| CN112267848A (en) * | 2020-10-23 | 2021-01-26 | 中国矿业大学 | Grouting method and device capable of automatically sealing holes and preventing grouting pump pipeline from being blocked |
| CN112267848B (en) * | 2020-10-23 | 2021-11-09 | 中国矿业大学 | Grouting method and device capable of automatically sealing holes and preventing grouting pump pipeline from being blocked |
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