CN105221150B - A kind of method of horizontal jet grouting stake reinforced stone door punching coal - Google Patents
A kind of method of horizontal jet grouting stake reinforced stone door punching coal Download PDFInfo
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- CN105221150B CN105221150B CN201510607942.0A CN201510607942A CN105221150B CN 105221150 B CN105221150 B CN 105221150B CN 201510607942 A CN201510607942 A CN 201510607942A CN 105221150 B CN105221150 B CN 105221150B
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- exposed
- horizontal jet
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- 239000003245 coal Substances 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000004080 punching Methods 0.000 title claims abstract description 12
- 239000004575 stone Substances 0.000 title claims abstract description 12
- 238000005553 drilling Methods 0.000 claims abstract description 27
- 238000010276 construction Methods 0.000 claims abstract description 17
- 238000005086 pumping Methods 0.000 claims abstract description 5
- 239000004568 cement Substances 0.000 claims description 22
- 239000011440 grout Substances 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 230000003014 reinforcing effect Effects 0.000 abstract description 12
- 239000000463 material Substances 0.000 abstract description 3
- 238000007596 consolidation process Methods 0.000 abstract 1
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010339 dilation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Earth Drilling (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention discloses a kind of method of horizontal jet grouting stake reinforced stone door punching coal, suitable for the horizontal jet grouting stake reinforced stone door punching coal of the medium-thickness seam with outburst hazard.Stop driving before exposed coal working face is less than 7 meters from the minimum normal distance of institute's exposed coal layer, pass through the drilling of roof in exposed coal work surface construction using rig, connection gas pumping pipe carries out gas pumping.In the range of gas bearing capacity and gas pressure are down to permission, horizontal jet grouting construction is carried out to each drilling using rotary churning pile machine, firm horizontal jet grouting stake is formed in drilling, significantly improves the reinforcing scope and fastening strength in coal seam, reduces the outburst hazard in coal seam.It can continue to tunnel forward after horizontal jet grouting stake thoroughly consolidation, until completing whole exposed coal process.This method not only can safely, quickly finish exposed coal work, and also reduce the input of human and material resources and financial resources.
Description
Technical field
It is especially a kind of to be applied to the medium-thickness seam with outburst hazard the present invention relates to a kind of method of stone door punching coal
Horizontal jet grouting stake reinforced stone door punching coal method.
Background technology
So far, projecting coal bed method for uncovering coal mainly from release and reinforce coal seam the two aspect progress, coal seam is unloaded
Press anti-reflection mode mainly there are the measures such as hydraulic flushing in hole, hydraulic fracturing and hydraulic slotted liner technique, mainly have metallic framework in terms of the reinforcing of coal seam
With the measure such as grouting and reinforcing.These measures achieve some effects in stone door punching coal protrusion-dispelling, but there is also deficiency, especially exist
It is even more so in terms of the reinforcing of coal seam.Conventional grouting and reinforcing can improve coal strength to a certain extent, but due to coal body
Crack is smaller, and cement grout dilation angle is limited, can only small range raising exposed coal regional coal-seam intensity, larger area can not be realized
The reinforcing in domain.Accordingly, it is desirable to provide a kind of coal uncovering method, can strengthen reinforcing coal strength and expand reinforcing scope,
Realize safely and fast exposed coal.
The content of the invention
Technical problem：The purpose of invention is overcome the deficiencies in the prior art part, there is provided a kind of method is simple, can significantly carry
The method of the horizontal jet grouting stake reinforced stone door punching coal of high reinforcing scope and fastening strength.
Technical scheme：A kind of method of horizontal jet grouting stake reinforced stone door punching coal of patent of the present invention, comprises the following steps：
A. before exposed coal working face is less than 7 meters from the minimum normal distance of institute's exposed coal layer, adjusted using messenger wire and horizon rule
Examination installs hole making drill, carries out pre-drilled cavity to coal seam direction, the hole that a root long degree is slightly less than perforate length is buried in pre-drilled cavity
Mouth pipe, and it is bonded and sealed with hole wall using resin, then constructed through multiple drillings in coal seam, applied along pre-drilled cavity with rig
Work carries out gas pumping after terminating to drilling；
B. when the gas pressure and gas bearing capacity in coal seam are down to below prominent boundary line, using rotary churning pile machine to it is each drill into
The flat rotary-spraying construction of water-filling, the drill bit of the rotary churning pile machine and drilling rod use can spray high-pressure water jet, compressed air, cement grout
Triple tubular constructions of jet, wherein the nozzle of 2 playpipes cuts coal to high-pressure water jet and compressed air while horizontal churning
Body, and discharge coal slime by compressed air；Meanwhile the churning of cement grout jet is injected coal body by the nozzle of another playpipe
In, cement grout is mixed to form horizontal jet grouting stake with coal body, so as to reinforce coal seam and reduce the outburst hazard in coal seam；
C. start exposed coal after horizontal jet grouting stake solidification, exposed coal since exposed coal working face up through roof when stop
Only, whole exposed coal work is completed.
The multiple pre-drilled cavities constructed to coal seam direction are 4, and perforate depth is 1~1.5m.
The ratio of mud of described cement grout is 1:1.
The pressure of described high-pressure water jet is 5~8MPa, flow 20L/min, the pressure of compressed air for 0.5~
1MPa, flow 0.5m3/ min, cement grout jet pressure are 1~2MPa, flow 20L/min, the pull rate of drilling rod
0.4~0.8m/min, 10~15r/min of rotary speed.
In the journey of the construction drill, the measurement of 2m use levels guide instrument is often crept into once, to prevent hole scattering.
Beneficial effect：By adopting the above-described technical solution, when the present invention solves current stone door punching coal, conventional slip casting
The problems such as reinforcing scope that coal seam occurs is smaller, fastening strength is not high is reinforced, rotary churning pile machine produces high-pressure water jet and compression is empty
Gas is cut coal body and expands the diameter of drilling, while produces cement grout and coal body is further cut and formed
Horizontal jet grouting stake, and caused high pressure can promote cement grout to enter in the crack of coal body.The horizontal jet grouting so formed
Stake can not only expand the reinforcing scope in coal seam, moreover it is possible to improve the fastening strength in coal seam.This method not only can safely, quickly it is complete
Worked into exposed coal, and also reduce the input of human and material resources and financial resources, there is wide applicability.
Brief description of the drawings
Fig. 1 be the present invention drilling machine construction after formed drill structural representation.
Fig. 2 is the structural representation after the completion of horizontal jet grouting stake of the present invention.
Fig. 3 is that the present invention completes the structural representation after whole exposed coal.
Fig. 4 is the arrangement schematic diagram that the present invention carries out high-pressure rotary-spray in drilling
In figure：1- digging laneways, 2- exposed coal working faces, 3- drillings, 4- coal seams, 5- horizontal jet grouting stakes, 6- cement
Slurries jet, 7- high-pressure water jets and compressed air, 8- drilling rods, 9- drill bits.
Embodiment
One embodiment of patent of the present invention is further described below in conjunction with the accompanying drawings：
The method of the horizontal jet grouting stake reinforced stone door punching coal of the present invention, using devices such as rig, high-pressure horizontal rotary churning pile machines
Tool, and use high-pressure water jet and compressed air, cement grout to be comprised the following steps that as churning material：
Tunneled along the exposed coal working face 2 in the front of digging laneway 1, in minimum normal direction of the exposed coal working face 2 from the coal seam 4 taken off
Distance is less than before 7 meters, using messenger wire and the good hole making drill of horizon rule adjustment and installation, to the multiple pre-drilled cavities of coal seam direction construction, institute
It is 4 to state the multiple pre-drilled cavities constructed to coal seam direction, and perforate depth is 1~1.5m, as shown in Figure 1.In each pre-drilled cavity
An embedded root long degree is slightly less than the orifice tube of perforate length, and orifice tube is bonded and sealed with hole wall using resin, then with brill
Machine is constructed through the drilling 3 in coal seam 4 along pre-drilled cavity forward horizontal, during construction drill 3, often creeps into 2m horizontally-guided instrument
Measurement once, to prevent hole scattering, once finding that deflection will rectify a deviation in time, after the construction of drilling 3 terminates, routinely arranges extraction
Pipe carries out gas pumping to drilling；
When the gas pressure and gas bearing capacity in coal seam 4 are down to below prominent boundary line, i.e., when gas bearing capacity and gas pressure drop
To permission, horizontal jet grouting construction is carried out in drilling 3 using rotary churning pile machine, by the drill bit 9 of rotary churning pile machine, drilling rod 8
3 bottoms of drilling are extended, are lifted outward on one side, one side churning high-pressure water jet and compressed air, cement grout.The rotary churning pile machine
Drill bit 9 and the use of drilling rod 8 can spray triple tubular constructions of high-pressure water jet, compressed air, cement grout jet, such as Fig. 4 institutes
Show, wherein the nozzle of 2 playpipes is to high-pressure water jet and compressed air 7, while horizontal churning cutting coal body, and by compression
Air discharges coal slime；Meanwhile the nozzle of another playpipe injects the churning of cement grout jet 6 in coal body, makes cement grout
Horizontal jet grouting stake 5 is mixed to form with coal body, as shown in Fig. 2 this can not only play the effect of reaming, and is formed in drilling
Firm horizontal jet grouting stake, the reinforcing scope and fastening strength in coal seam are significantly improved, so as to reinforce coal seam 4 and reduce coal seam 4
Outburst hazard；According to the ratio of mud 1 before construction：1 prepares cement grout, and slurries stirring must stir evenly, and mixing time must not be low
In 5 minutes, once stir usage time and also control within 3h；The pressure of described high-pressure water jet is 5~8MPa, and flow is
20L/min, the pressure of compressed air is 0.5~1MPa, flow 0.5m3/ min, the pressure of cement grout jet 6 are 1~2MPa,
Flow is 20L/min, 0.4~0.8m/min of pull rate of drilling rod 8,10~15r/min of rotary speed；
Start exposed coal after the solidification of horizontal jet grouting stake 5, exposed coal since exposed coal working face 2 up through 4 top plate of coal seam when
Stop, as shown in figure 3, completing whole exposed coal work.
Claims (1)
- A kind of 1. method of horizontal jet grouting stake reinforced stone door punching coal, it is characterised in that comprise the following steps：A. in exposed coal working face（2）From institute's exposed coal layer（4）Minimum normal distance be less than 7 meters before, using messenger wire and horizon rule The good hole making drill of adjustment and installation, to the multiple pre-drilled cavities of coal seam direction construction, a root long degree is buried in pre-drilled cavity and is slightly less than perforate length The orifice tube of degree, and orifice tube is bonded and sealed with hole wall using resin, then constructed forward through coal along pre-drilled cavity with rig Layer（4）Drilling（3）, the construction drill（3）During, the measurement of 2m use levels guide instrument is often crept into once, to prevent Hole scattering；Construct after terminating to drilling（3）Carry out gas pumping；B. coal seam is worked as（4）Gas pressure and gas bearing capacity be down to below prominent boundary line, using rotary churning pile machine to each drilling （3）Horizontal jet grouting construction is carried out, according to the ratio of mud 1 before construction：1 prepares cement grout, and slurries stirring must stir evenly, mixing time It must not be less than 5 minutes, once stir usage time and also control within 3h；The drill bit (9) of rotary churning pile machine, drilling rod (8) are extended Drill (3) bottom, lifts outward on one side, one side churning high-pressure water jet and compressed air, cement grout；The rotary churning pile machine Drill bit（9）And drilling rod（8）Using the triple tubular constructions that can spray high-pressure water jet, compressed air, cement grout jet, wherein 2 The nozzle of individual playpipe is to high-pressure water jet and compressed air（7）, while horizontal churning cutting coal body, and will by compressed air Coal slime is discharged；Meanwhile the nozzle of another playpipe is by cement grout jet（6）In churning injection coal body, make cement grout and coal Body is mixed to form horizontal jet grouting stake（5）, so as to reinforce coal seam（4）And reduce coal seam（4）Outburst hazard；C. when horizontal jet grouting stake（5）Start exposed coal after solidification, exposed coal is from exposed coal working face（2）Start up through coal seam（4）Top Stop during plate, complete whole exposed coal work；The multiple pre-drilled cavities constructed to coal seam direction are 4, and perforate depth is 1 ~ 1.5m；The pressure of described high-pressure water jet is 5 ~ 8MPa, and flow 20L/min, the pressure of compressed air is 0.5 ~ 1MPa, stream Measure as 0.5m3/min, cement grout jet（6）Pressure is 1 ~ 2MPa, flow 20L/min, drilling rod（8）Pull rate 0.4 ~ 0.8m/min, 10 ~ 15r/min of rotary speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510607942.0A CN105221150B (en) | 2015-09-22 | 2015-09-22 | A kind of method of horizontal jet grouting stake reinforced stone door punching coal |
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| CN201510607942.0A CN105221150B (en) | 2015-09-22 | 2015-09-22 | A kind of method of horizontal jet grouting stake reinforced stone door punching coal |
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| Publication Number | Publication Date |
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| CN105221150B true CN105221150B (en) | 2018-02-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108374672B (en) * | 2018-02-27 | 2019-04-30 | 中国矿业大学 | A method of reinforcing Deep Mine soft coal level roadway surrounding rock |
| CN113236349A (en) * | 2021-06-30 | 2021-08-10 | 西南交通大学 | Construction method of outburst-prevention rotary spraying enclosure pile for coal-series stratum railway gas tunnel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101603431B (en) * | 2009-07-14 | 2011-05-11 | 中国矿业大学 | Method for reinforcing outburst-prone coal seam cross-cut coal uncovering |
| CN101598030B (en) * | 2009-07-14 | 2012-02-01 | 中国矿业大学 | Method for realizing fast coal exposing of coal seam rock cross with outburst danger |
| CN102242640B (en) * | 2011-07-05 | 2013-09-25 | 河南煤业化工集团研究院有限责任公司 | Rapid outburst elimination method for cross cut coal uncovering in coal mine underground |
| CN102536243A (en) * | 2012-02-28 | 2012-07-04 | 重庆市能源投资集团科技有限责任公司 | Coal seam freezing type cross-drift coal uncovering method |
| CN104213921B (en) * | 2014-08-07 | 2016-03-30 | 中国矿业大学 | Based on the freezing type coal uncovering method of hydraulic slotted liner technique |
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