CN103195467A - Hydraulic fracturing and grouting solidification combined rock cross-cut coal uncovering method - Google Patents
Hydraulic fracturing and grouting solidification combined rock cross-cut coal uncovering method Download PDFInfo
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- CN103195467A CN103195467A CN2013101121210A CN201310112121A CN103195467A CN 103195467 A CN103195467 A CN 103195467A CN 2013101121210 A CN2013101121210 A CN 2013101121210A CN 201310112121 A CN201310112121 A CN 201310112121A CN 103195467 A CN103195467 A CN 103195467A
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- 239000003245 coal Substances 0.000 title claims abstract description 100
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000011435 rock Substances 0.000 title abstract description 10
- 238000007711 solidification Methods 0.000 title abstract description 5
- 230000008023 solidification Effects 0.000 title abstract description 5
- 239000002002 slurry Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000002347 injection Methods 0.000 claims abstract description 8
- 239000007924 injection Substances 0.000 claims abstract description 8
- 238000005187 foaming Methods 0.000 claims abstract description 4
- 230000035515 penetration Effects 0.000 claims abstract description 4
- 238000007569 slipcasting Methods 0.000 claims description 23
- 238000004080 punching Methods 0.000 claims description 15
- 239000004575 stone Substances 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 6
- 238000000605 extraction Methods 0.000 claims description 5
- 238000007796 conventional method Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 230000008595 infiltration Effects 0.000 claims description 3
- 238000001764 infiltration Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000010412 perfusion Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000005641 tunneling Effects 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract 2
- 238000005553 drilling Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 238000005086 pumping Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000008033 biological extinction Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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Abstract
The invention discloses a hydraulic fracturing and grouting solidification combined rock cross-cut coal uncovering method which includes that when roadway drivage reaches a 10m coal layer vertical distance, fracturing holes of a coal layer are drilled, the coal layer is subjected to hydraulic fracturing, and the water injection amount reaches the preset value after above 3MPa pressure drop appears in fracturing; a plurality of grouting holes are drilled when the roadway drivage reaches a 5m coal layer vertical distance; coal layer methane gases are extracted through the fracturing holes and the grouting holes; the coal layer is subjected to quantitative grouting through the grouting holes with grouting pressure to be above 15MPa; and roadway drivage is continued after grouting solidification, and rock cross-cut coal uncovering is completed. Single hole grouting amount includes grouting hole grouting amount M1 and coal layer permeation grouting amount M2 and is calculated in the following formula, and grouting density, storage coefficient, grouting foaming expansion rate, drilling diameter, grouting hole length, penetration radius of slurry in the coal layer, length of the grouting holes in the coal layer and coal layer porosity are included in the formula. The hydraulic fracturing and grouting solidification combined rock cross-cut coal uncovering method has the advantages of being capable of fast and safely performing rock cross-cut coal uncovering, avoiding re-handling, and improving social benefit.
Description
Technical field
The present invention relates to a kind of stone door punching coal method, especially a kind of being applicable to has the quick stone door punching coal method that the fracturing of the low-permeable weak seam of prominent danger by force combines with slip casting curing.
Background technology
In the roadway construction in the high mine of outburst hazard, extensive, the high-intensity coal of the easiest generation and gas were outstanding when crossdrift was exposed the coal seam, were seriously restricting the safe and efficient production of mine.Crossdrift protrusion-dispelling method for uncovering coal of the prior art is more, comprises pre-gas pumping destressing method, coal body solidification method etc.All must contain in the whole bag of tricks according to " coal and gas outburst prevention treatment regulation ", in the step of taking off construction gas pumping hole and mash gas extraction before the crossdrift of carrying out according to a conventional method in the tunnelling process.Yet along with the increase of the coal mining degree of depth, coal and gas outstanding problem seem more and more serious, take single extinction measure to be difficult to reach the purpose of safety, quick exposed coal.Chinese patent publication number CN101598030A; open December 9 2009 date; invention and created name " method for realizing fast coal exposing of coal seam rock cross with outburst danger "; a kind of method that pre-gas pumping release and coal body are fixedly combined is disclosed; comprise by the high-pressure water jet slot; technology such as hydraulic flushing in hole or loosening big gun is destroyed the coal seam in crossdrift periphery certain limit; carry out the gas pumping release then; make a stiffening ring by grout injection in the certain thickness coal seam of crossdrift periphery again; thereby form a protection structure; to guarantee to take off crossdrift safety, this method is applicable to the stone door punching coal with strong prominent dangerous coal seam.Yet, this takes off the crossdrift method in implementation process, technology such as the high-pressure water jet slot, hydraulic flushing in hole or the loosening big gun that adopt are limited to the damage envelope of coal body and the crack that produces in damage envelope, and, weigh the aeration level in coal seam and be to guarantee the key element taking off crossdrift safety and raise the efficiency to the reasonability that parameters such as coal seam grouting amount are selected, but it is also unexposed in this technical scheme, therefore, the colleague also need carry out necessary groping and the experiment experience accumulation in specific implementation process, be not easy to directly apply., require further improvement for this reason, directly adopt with convenient colleague's same nature colliery, avoid the duplication of labour, improve industry and take off the crossdrift level, improve social benefit.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, provide the coal seam fracturing of a kind of outburst danger to solidify the stone door punching coal method that combines with coal body, with the purpose that reaches fast, safety is exposed coal and gas is projecting coal bed, simultaneously, be convenient to go together and directly adopt, avoid the duplication of labour, improve social benefit.
For achieving the above object, the present invention adopts following technical scheme.
A kind of fracturing is solidified the stone door punching coal method that combines with slip casting, may further comprise the steps:
A, when tunnelling when hanging down apart from 10m apart from the coal seam, creep into the pressure break hole along the tunnelling direction, until penetrating the coal seam, sealing of hole is carried out in the pressure break hole to be handled, and by the pressure break hole fracturing is carried out in coal-bed flooding, after frac pressure continues to rise to the pressure that a setting value occurs and falls △ P, stop pressure break after keeping pressure break to water injection rate to reach predicted value;
B, in tunnelling when hanging down apart from 5m apart from the coal seam, two help to expand earpick shape drill site in the tunnel, construction penetrates a plurality of injected holes in coal seam, the boring scope of injected hole is the outer 2～2.5m of drift section outline line;
C, in injected hole, install Grouting Pipe, injected hole carried out sealing of hole handle, and by pressure break hole and injected hole extraction coal-bed gas to setting requirement;
D, select arbitrary injected hole for the treatment of slip casting, the slurries that can reinforce the coal seam after solidifying to its hole internal pressure perfusion by Grouting Pipe, and interim shutoff all the other treat the injected hole of slip casting; Its grouting pressure when reaching the setting grouting amount, stops slip casting more than 15MPa;
E, circulation step d are until the slip casting of finishing all injected holes;
F, treat slurries solidify and check up to standard after, carry out tunnelling and pass the coal seam according to conventional method, finish stone door punching coal work;
Described pressure falls △ P and is generally more than the 3MPa; Described grouting amount comprises the grouting amount M in the injected hole
1Grouting amount M with infiltration diffusion in the coal seam
2, its single hole slip casting total amount is calculated as follows:
In the formula:
-serum density, kg/m
3
-injected hole length, the m of unit;
The penetration radius of-slurries in the coal seam determined the m of unit by ocurrence of coal seam feature and fracturing effect;
Described fracturing estimates that water injection rate should be definite according to institute's concrete feature in pressure break coal seam; Described pressure break bore dia is 95mm; Described injected hole diameter is 75mm; It is the seamless steel pipe of 12.5mm that described Grouting Pipe adopts diameter.
The invention has the beneficial effects as follows: the present invention is by at first carrying out fracturing to coal and rock, impel coal body to produce a large amount of perforation cracks, coal and rock is on a large scale behind the release mash gas extraction, again to this zone boring grouting reinforcing, improved the intensity of coal and rock greatly, thereby the outstanding and percussion when effectively resisting exposed coal reaches the purpose of exposed coal fast and safely.When fracturing makes coal and rock produce a large amount of crack, discharged the stress primitively of a part, guaranteed that slurries inject smoothly, and enlarged the scope of grouting and reinforcing.This cover method is being guaranteed under the prerequisite of safe exposed coal, can reduce the extinction engineering quantity, shorten construction period, has satisfied the needs of strong projecting coal bed stone door punching coal fast and safely.Simultaneously, the pressure drop values when the present invention has provided pressure break and the grouting pressure of slip casing by pressure and grouting amount avoid the colleague to carry out the duplication of labour, can bring remarkable social benefit.
Description of drawings
Fig. 1 is the arrangement schematic diagram that pressure break hole 3, injected hole 4 and tunnel in the stone door punching coal method that combines are solidified in fracturing of the present invention and slip casting.
Fig. 2 is the A-A sectional drawing among Fig. 1.
Fig. 3 is the B-B sectional drawing among Fig. 1.
Fig. 4 is that the position of injected hole 4 and Grouting Pipe 7 concerns schematic diagram.
The specific embodiment
The present invention is further illustrated below in conjunction with accompanying drawing, but therefore do not limit the present invention among the described scope of embodiments.
Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, a kind of fracturing is solidified the stone door punching coal method that combines with slip casting, it is characterized in that, may further comprise the steps:
A, when tunnel 6 driving to apart from the coal seam 1 when hanging down apart from 10m, 6 tunneling directions creep into pressure break hole 3 along the tunnel, until penetrating coal seam 1, sealing of hole is carried out in pressure break hole 3 to be handled, and carry out fracturing by 3 pairs of coal seam 1 water fillings in pressure break hole, after frac pressure continues to rise to the pressure that a setting value occurs and falls △ P, stop pressure break after keeping pressure break to water injection rate to reach predicted value;
B, 6 drivings are to apart from the coal seam 1 when hanging down apart from 5m in the tunnel, and 6 liang of groups expand earpick shape drill sites 5 in the tunnel, and construction penetrates a plurality of injected holes 4 in coal seam 1, and the boring scope of injected hole 4 is the outer 2～2.5m of tunnel 6 range line profiles;
C, in injected hole 4, install Grouting Pipe 7, injected hole 4 carried out sealing of hole handle and form sealing of hole section 8, and by pressure break hole 3 and injected hole 4 extraction coal seams 1 gas to setting requirement;
D, select arbitrary injected hole 4 for the treatment of slip casting, the slurries that can reinforce the coal seam after solidifying to its hole internal pressure perfusion by Grouting Pipe 7, and interim shutoff all the other treat the injected hole 4 of slip casting; Its grouting pressure when reaching the setting grouting amount, stops slip casting more than 15MPa;
E, circulation step d are until the slip casting of finishing all injected holes 4;
F, treat slurries solidify and check up to standard after, carry out tunnelling and pass the coal seam according to conventional method, finish stone door punching coal work;
Described pressure falls △ P and is generally more than the 3MPa; Described grouting amount comprises the grouting amount M in the injected hole 4
1Grouting amount M with infiltration diffusion in the coal seam 1
2, its single hole slip casting total amount is calculated as follows:
In the formula:
-serum density, kg/m
3
-injected hole 4 length, the m of unit;
Described fracturing estimates that water injection rate should be definite according to institute's concrete feature in pressure break coal seam; Described pressure break hole 3 diameters are 95mm; Described injected hole 4 diameters are 75mm; It is the seamless steel pipe of 12.5mm that described Grouting Pipe 7 adopts diameter.
Though more than combine accompanying drawing and described embodiments of the present invention, but those of ordinary skill in the art can recognize also in the scope to claims and make various variations or modification that these modifications and variations are interpreted as within scope of the present invention and intention.
Claims (3)
1. a fracturing is solidified the stone door punching coal method that combines with slip casting, it is characterized in that, may further comprise the steps:
A, when tunnel (6) driving when (1) hangs down apart from 10m apart from the coal seam, (6) tunneling direction creeps into pressure break hole (3) along the tunnel, until penetrating coal seam (1), pressure break hole (3) are carried out sealing of hole handles, and by pressure break hole (3) fracturing is carried out in coal seam (1) water filling, after frac pressure continues to rise to the pressure that a setting value occurs and falls △ P, stop pressure break after keeping pressure break to water injection rate to reach predicted value;
B, in the tunnel (6) driving when (1) hangs down apart from 5m apart from the coal seam, (6) two help to expand earpick shape drill site (5) in the tunnel, construction penetrates a plurality of injected holes (4) in coal seam (1), and the boring scope of injected hole (4) is the outer 2～2.5m of tunnel (6) range line profile;
C, in injected hole (4), install Grouting Pipe (7), injected hole (4) carried out sealing of hole handle, and by pressure break hole (3) and injected hole (4) extraction coal seam (1) gas to setting requirement;
D, select arbitrary injected hole (4) for the treatment of slip casting, the slurries that can reinforce the coal seam after solidifying to its hole internal pressure perfusion by Grouting Pipe (7), and interim shutoff all the other treat the injected hole (4) of slip casting; Its grouting pressure when reaching the setting grouting amount, stops slip casting more than 15MPa;
E, circulation step d are until the slip casting of finishing all injected holes (4);
F, treat slurries solidify and check up to standard after, according to the conventional method digging laneway and pass the coal seam, finish stone door punching coal work;
It is more than the 3MPa that △ P falls in described pressure; Described grouting amount comprises the grouting amount M in the injected hole (4)
1And the grouting amount M of infiltration diffusion in coal seam (1)
2, its single hole slip casting total amount is calculated as follows:
In the formula:
-serum density, kg/m
3
-bore diameter, the mm of unit;
-injected hole (4) length, the m of unit;
2. fracturing according to claim 1 is solidified the stone door punching coal method that combines with slip casting, it is characterized in that described pressure break hole (3) diameter is 95mm; Described injected hole (4) diameter is 75mm; It is the seamless steel pipe of 12.5mm that described Grouting Pipe (7) adopts diameter.
3. fracturing according to claim 1 is solidified the stone door punching coal method that combines with slip casting, it is characterized in that, described fracturing estimates that water injection rate should be definite according to institute's concrete feature in pressure break coal seam.
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| CN201310112121.0A CN103195467B (en) | 2013-04-02 | 2013-04-02 | Hydraulic fracturing and grouting solidification combined rock cross-cut coal uncovering method |
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| CN103195467B CN103195467B (en) | 2015-02-25 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103510957A (en) * | 2013-10-08 | 2014-01-15 | 中国矿业大学 | Combined rock cross-cut coal uncovering method |
| CN103899348A (en) * | 2014-04-23 | 2014-07-02 | 重庆市能源投资集团科技有限责任公司 | Method for fast extracting gas on coalface |
| CN104213921A (en) * | 2014-08-07 | 2014-12-17 | 中国矿业大学 | Freezing-type stone door cross-measure coal uncovering method based on hydraulic seam cutting |
| CN104213932A (en) * | 2014-08-07 | 2014-12-17 | 中国矿业大学 | Outburst coal bed hydraulic phase change cracking cross-cut coal uncovering method |
| CN105003294A (en) * | 2015-07-30 | 2015-10-28 | 山东科技大学 | Method for coal uncovering in cross cut by hydrothermal coupling based coal fracturing |
| CN105221182A (en) * | 2015-09-21 | 2016-01-06 | 河南理工大学 | Coal uncovering method under the complex geological condition of pole |
| CN104074539B (en) * | 2014-07-22 | 2016-05-11 | 贵州大学 | One is held back gas drainage under suction structure and implementation method thereof |
| CN105781552A (en) * | 2016-03-07 | 2016-07-20 | 安徽理工大学 | Novel high-gas outburst coal seam stereoscopic punching crosscut coal uncovering method |
| CN108386193A (en) * | 2018-02-02 | 2018-08-10 | 陕西煤业化工技术研究院有限责任公司 | A kind of hard integrality top plate chemically expansible pressure break pressure relief method in end |
| CN108590739A (en) * | 2018-04-11 | 2018-09-28 | 中国平煤神马能源化工集团有限责任公司 | A kind of prominent tunnel regionality energy divides source to control anti-burst method |
| CN112855073A (en) * | 2021-02-04 | 2021-05-28 | 河南理工大学 | Device and method for solidifying coal bed by using microorganisms in cross-cut coal uncovering process |
| CN114753849A (en) * | 2022-04-20 | 2022-07-15 | 中国矿业大学 | Soft rock layered grouting reinforcement method based on hydraulic fracturing permeability increase |
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Cited By (16)
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|---|---|---|---|---|
| CN103510957B (en) * | 2013-10-08 | 2016-04-20 | 中国矿业大学 | A kind of combined type coal uncovering method |
| CN103510957A (en) * | 2013-10-08 | 2014-01-15 | 中国矿业大学 | Combined rock cross-cut coal uncovering method |
| CN103899348A (en) * | 2014-04-23 | 2014-07-02 | 重庆市能源投资集团科技有限责任公司 | Method for fast extracting gas on coalface |
| CN104074539B (en) * | 2014-07-22 | 2016-05-11 | 贵州大学 | One is held back gas drainage under suction structure and implementation method thereof |
| CN104213921A (en) * | 2014-08-07 | 2014-12-17 | 中国矿业大学 | Freezing-type stone door cross-measure coal uncovering method based on hydraulic seam cutting |
| CN104213932A (en) * | 2014-08-07 | 2014-12-17 | 中国矿业大学 | Outburst coal bed hydraulic phase change cracking cross-cut coal uncovering method |
| CN105003294A (en) * | 2015-07-30 | 2015-10-28 | 山东科技大学 | Method for coal uncovering in cross cut by hydrothermal coupling based coal fracturing |
| CN105003294B (en) * | 2015-07-30 | 2017-09-29 | 山东科技大学 | One kind is based on hydrothermal reaction coupling pressure break coal body coal uncovering method |
| CN105221182B (en) * | 2015-09-21 | 2017-11-17 | 河南理工大学 | Coal uncovering method under the complex geological condition of pole |
| CN105221182A (en) * | 2015-09-21 | 2016-01-06 | 河南理工大学 | Coal uncovering method under the complex geological condition of pole |
| CN105781552A (en) * | 2016-03-07 | 2016-07-20 | 安徽理工大学 | Novel high-gas outburst coal seam stereoscopic punching crosscut coal uncovering method |
| CN108386193A (en) * | 2018-02-02 | 2018-08-10 | 陕西煤业化工技术研究院有限责任公司 | A kind of hard integrality top plate chemically expansible pressure break pressure relief method in end |
| CN108590739A (en) * | 2018-04-11 | 2018-09-28 | 中国平煤神马能源化工集团有限责任公司 | A kind of prominent tunnel regionality energy divides source to control anti-burst method |
| CN112855073A (en) * | 2021-02-04 | 2021-05-28 | 河南理工大学 | Device and method for solidifying coal bed by using microorganisms in cross-cut coal uncovering process |
| CN112855073B (en) * | 2021-02-04 | 2022-09-20 | 河南理工大学 | Device and method for solidifying coal bed by using microorganisms in cross-cut coal uncovering process |
| CN114753849A (en) * | 2022-04-20 | 2022-07-15 | 中国矿业大学 | Soft rock layered grouting reinforcement method based on hydraulic fracturing permeability increase |
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Effective date of registration: 20170109 Address after: Nanbin road 400060 Chongqing Nan''an District No. 162 Building 2 floor 12 Patentee after: CHONGQING ENERGY INVESTMENT GROUP TECHNOLOGY Co.,Ltd. Patentee after: Chongqing University Address before: Nanping Nan''an District of Chongqing City Road 400060 No. 8 19 floor Patentee before: CHONGQING ENERGY INVESTMENT GROUP TECHNOLOGY Co.,Ltd. |
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