CN103161402B - Coal seam high-pressure hydraulic concordant is bored and is cut pressure relief method - Google Patents
Coal seam high-pressure hydraulic concordant is bored and is cut pressure relief method Download PDFInfo
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- CN103161402B CN103161402B CN201310103655.7A CN201310103655A CN103161402B CN 103161402 B CN103161402 B CN 103161402B CN 201310103655 A CN201310103655 A CN 201310103655A CN 103161402 B CN103161402 B CN 103161402B
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Abstract
The invention discloses a kind of coal body high-pressure hydraulic concordant brill and cut pressure relief method, including: help the surface of coal body and coal body of meeting head on to lay multiple drilling hole position respectively in the high stress concentrations region two of driving face haulage gate；Adopting hydraulic drill rig to be drilled in drilling hole position, drilling direction, horizontal by predetermined inclination, retreats brill when boring reaches projected depth；Drill rod end at hydraulic drill rig connects ejector, ejector and drilling rod is sent in the lump in the boring accomplished fluently；Open hydraulic drill rig, drive drilling rod and ejector rotates and carries out slot operation, in coal body, finally form release cavity；Repeat the above steps, implements other drilling hole position to drill, slot operation respectively, finally realizes the release to whole coal body.The coal seam high pressure water conservancy concordant of the present invention is bored and is cut pressure relief method, and it effectively shifts and reduces coal body local stress, it is achieved high stress concentrations region entirety release effect, decreases and presses number of times, reduces ground pressure strength and destructiveness, it is ensured that safety in production.
Description
Technical field
The present invention relates to mining industry strong ore deposit pressure diaster prevention and control technical field, be specifically related to a kind of coal seam high-pressure hydraulic concordant brill and cut pressure relief method.
Background technology
In recent years, along with the raising of China's Mining Market ability, mining rate is gradually increased, and mining depth is also deepened therewith, and so more strong pressure visualization area, ore deposit is just obvious all the more.The stress in coal bed of pressure visualization area, strong ore deposit is general very big, and exploitation link is dealt with improperly and is easy to produce ore deposit pressure disaster.The production exploiting field in Yan Bei colliery is affected by factors such as tectonic stress, roof Stress and protection coal pillar; mining process easily frequently occurs coal big gun phenomenon; there is strong ore deposit pressure to manifest generation, easily cause injury to personnel, roadway deformation, device damage etc., drastically influence the safety in production of mine.For above-mentioned situation, although taking the pressure prophylactico-therapeutic measures of some ore deposits at present, but being respectively arranged with its specific adaptations condition, obtaining less effective, it is impossible to effectively reduce and press number of times and reduce ground pressure strength and destructiveness, still can not fundamentally ensure the safety in production in colliery.
Summary of the invention
For overcoming the deficiency existed in existing unloading technology, the invention provides a kind of coal seam high-pressure hydraulic concordant brill and cut pressure relief method, it can effectively shift and reduce coal body local stress, realize high stress concentrations region entirety release effect, decrease and press number of times, reduce ground pressure strength and destructiveness, it is ensured that production safety.
For realizing the above-mentioned purpose of the present invention, the coal seam high pressure water conservancy concordant brill of the present invention cuts pressure relief method and comprises the following steps: 1) helps coal body and the surface met head on to lay multiple drilling hole position respectively in the high stress concentrations region two of driving face haulage gate, keeps preset space length between adjacent drilling hole position；2) adopting hydraulic drill rig to be drilled in drilling hole position, drilling direction, horizontal by predetermined inclination, retreats brill when boring reaches projected depth；3) connecting ejector at the drill rod end of hydraulic drill rig, send in the boring accomplished fluently in the lump by ejector and drilling rod, the feeding degree of depth of ejector keeps preset distance with aperture；4) open hydraulic drill rig, drive drilling rod and ejector rotates and carries out slot operation, in coal body, finally form release cavity, it is achieved the release to local coal body；5) repeat the above steps 2)～step 4), implement respectively other drilling hole position to drill, slot operation, finally realize the release to whole coal body.
Preferably, hydraulic slotted liner technique operation described in step 4) includes: adopts whole section of coal body slot cutting within the scope of distance aperture 15～30m, and adopts the cutting of segmentation coal body slot within the scope of distance aperture 4～15m.
Further, described whole section of coal body slot is cut into ejector and moves along borehole axial and whole section of coal body is carried out uninterrupted radial cuts, ultimately forms the porous release cavity with certain diameter.
Further, described segmentation coal body slot is cut into ejector and moves along borehole axial, first to the uninterrupted radial cuts of a bit of coal body, form first disc type release cavity, move slot drilling rod afterwards to another segment and uninterruptedly to cut, forming second disc type release cavity, repeat the above steps does the uninterrupted cutting of multiple segment, ultimately forms the disc type release cavity of some segments.
Preferably, often the spacing of adjacent two described disc type release cavitys is 2～4m, and the coal output of each described disc type release cavity is 0.15～0.3t；The radius of described hole formula release cavity is 0.3～0.4m, and every meter of coal output is 0.4～0.7t.
Particularly, often the spacing of adjacent two described disc type release cavitys is 2.5m.
Preferably, described whole section of coal body slot cutting and the cutting of described segmentation coal body slot be all contained on construction tunneling direction every meter no less than the static slot of 15min fixed point with no less than the slot step that before and after 10min, dynamic slot combines repeatedly, the static slot every meter of 15min fixed point is divided into 3 sections, and every slot period is no less than 5min.
Preferably, preset space length described in step 1) is 3.2～5m；Step 2) described in projected depth be 0～30m；Step 2) described in predetermined inclination include in two the first predetermined inclination helping coal body with in the second predetermined inclination of coal body of meeting head on, wherein said first predetermined inclination is 5 °～7 °, and described second predetermined inclination is 2 °～3 °；Preset distance described in step 3) includes at two the first preset distances helping coal body with at the second preset distance of coal body of meeting head on, and wherein said first preset distance is 3～5m, and described second preset distance is 4～6m.
Particularly, described first preset distance is 4m, and described second preset distance is 5m.
Preferably, step 2) described in hydraulic drill rig be emulsification pump hydraulic drill rig；The pressure of slot operation described in step 4) is not less than 28MP.
Compared with prior art, the coal seam high pressure water conservancy concordant of the present invention is bored and is cut pressure relief method and have the advantage that
1) coal seam of the present invention high-pressure hydraulic concordant bores that to cut the processing step of pressure relief method clear, easy to operate, practical；
2) present invention passes through Reasonable Arrangement drilling hole column pitch and drilling depth, and help and meet head on into a fixed angle of altitude enforcement to hole to coal body two, choose best drilling depth simultaneously and implement slot operation, reach the release effect become apparent from so that actual job is more safe and reliable；
3) present invention by adopting difference to bore mode of cutting to different hole depth position sections, and reasonable distribution is bored and cut the time, it is determined that best release scheme, improves brill and cuts speed, reduces brill and cut risk factor that may be present in operation；
4) coal seam of the present invention high-pressure hydraulic concordant is bored and is cut pressure relief method and can effectively shift and reduce coal body local stress, it is achieved high stress concentrations region entirety release effect, decreases and presses number of times, reduces ground pressure strength and destructiveness, it is ensured that safety in production.
Below in conjunction with accompanying drawing, the present invention is further detailed explanation.
Accompanying drawing explanation
Fig. 1 is that coal body high-pressure hydraulic concordant of the present invention bores the erosion control simulation schematic diagram cutting pressure relief method；
Fig. 2 a helps the boring layout of coal body and brill to cut schematic diagram in driving face haulage gate high stress concentrations region two；
Fig. 2 b is the left view of Fig. 2 a；
Fig. 3 meets head on the boring layout of coal body and brill cuts schematic diagram in driving face haulage gate high stress concentrations region；
Fig. 4 is the structural representation adopting whole section of incising coal seam mode to carry out slot operation；
Fig. 5 is the structural representation adopting segmentation incising coal seam mode to carry out slot operation.
Description of reference numerals: 1-water pipe；2-water tank；3-connecting tube；4-Pressure gauge；5-water injecting pump；6-water meter；7-relief valve；8-high pressure line；9-blowout hookup；10-rock mass；11-coal body；12-holes；13-two helps coal body；14-meets head on coal body；15-disc type release cavity；16-porous release cavity；α-predetermined inclination.
Detailed description of the invention
As shown in FIG. 1 to 3, coal body high-pressure hydraulic concordant of the present invention is bored the step cutting pressure relief method and is included: 1) helps in the high stress concentrations region two of driving face haulage gate the surface of coal body 13 and coal body 14 of meeting head on to lay multiple drilling hole position respectively, keeps preset space length between adjacent drilling hole position；2) adopting hydraulic drill rig to be drilled in drilling hole position, drilling direction, horizontal by predetermined inclination, retreats brill when boring 12 reaches projected depth；3) connecting ejector at the drill rod end of hydraulic drill rig, send in the boring 12 accomplished fluently in the lump by ejector and drilling rod, the feeding degree of depth of ejector keeps preset distance with aperture；4) open hydraulic drill rig, drive drilling rod and ejector rotates and carries out slot operation, in coal body 11, finally form release cavity, it is achieved the release to local coal body；5) repeat the above steps, implements other drilling hole position to drill, slot operation respectively, finally realizes the release to whole coal body.
Specifically, in step 4), hydraulic slotted liner technique operation includes: adopts whole section of coal body slot cutting within the scope of distance aperture 15～30m, adopts the cutting of segmentation coal body slot within the scope of distance aperture 4～15m.
Embodiment one
As it is shown in figure 1, the equipment of the present embodiment and technique are as follows respectively:
1) equipment
Slot pump: model BRW400/31.5 moulded coal mine-used emulsion pump, rated pressure 31.5Mpa, metered flow 400L/min；
Water tank: irony, volume 3m3；
Pressure gauge: model YHY60(B) Mine-used I. S digital pressure gauge.
2) pipeline
Pressure duct: selecting internal diameter respectively Φ 32mm and Φ 19mm, compressive resistance is not less than the high-pressure rubber pipe of 35MPa.
3) drilling tool
Rig: climb formula hydraulic drill rig ZYJ-680 type, drilling rod Φ 50mm, drill bit Φ 94mm, for hole 12 construction, slot shower nozzle selects upper three aperture, hole standards to be 2.0,2.5,3.0.
4) technological process
Water pipe 1 → water tank, 2 → connecting tube, 3 → water injecting pump 5(Pressure gauge 4 is measured) → high pressure line 8(water meter 6 measures, and has relief valve 7) → rig and brill cut device → blowout hookup 9 → boring, 12 → coal body 11.
As shown in Figure 4, within the scope of distance aperture 15～30m, ejector moves axially along boring 12 and whole section of coal body within the scope of this is carried out uninterrupted radial cuts, ultimately form the porous release cavity 16 with certain diameter, the radius of porous release cavity is preferably 0.3～0.4m, every meter of coal output is 0.4～0.7t, and total coal output controls at 6～10.5t.
Embodiment two
The equipment of the present embodiment and technique are with embodiment one.
As shown in Figure 5, within the scope of distance aperture 8～15m, ejector moves axially along boring 12, first to the uninterrupted radial cuts of a bit of coal body, form first disc type release cavity 15, move slot drilling rod afterwards and to another segment and uninterruptedly cut, form second disc type release cavity 15, repeat the above steps does the uninterrupted cutting of multiple segment, ultimately forms the disc type release cavity 15 of some segments.Often the spacing of adjacent two disc type release cavitys 15 is preferably 2～4m, it is preferred to 2.5m, and the coal output of each disc type release cavity 15 is 0.15～0.3t, and total coal output controls at about 0.6～1.2t.
In order to reach more preferably slot effect, the present invention whole section of coal body slot cutting in embodiment one and the segmentation coal body slot cutting in embodiment two all have employed on construction tunneling direction every meter no less than the static slot of 15min fixed point with no less than the slot step that before and after 10min, dynamic slot combines repeatedly, the static slot every meter of 15min fixed point is divided into 3 sections, every slot period is no less than 5min, it is preferred to 5min.
Embodiment three
The equipment of the present embodiment and technique are with embodiment one.
Brill for guaranteeing the present invention cuts construction and plays expection release effect, carry out repeatedly testing to pressure relief method, preferred means of testing includes: the preset space length in step 1) is maintained at 3.2～5m, step 2) in projected depth preferably 0～30m, step 2) in predetermined inclination α include in two the first predetermined inclination helping coal body 13 with in the second predetermined inclination of coal body 14 of meeting head on, wherein the first predetermined inclination preferably 5 °～7 °, second inclines predetermined angle preferably 2 °～3 °, preset distance in step 3) includes at two the first preset distances helping coal body 13 with at the second preset distance of coal body 14 of meeting head on, wherein the first preset distance is preferably 3～5m, preferably 4m, second preset distance is for being preferably 4～6m, preferably 5m.Additionally, pressure has been also carried out control by the present invention in construction, by studying prior art, in conjunction with the construction characteristic of the present invention, in construction, the pressure of slot operation is preferably 28MP, it is desirable on 28MP.
By above-mentioned several embodiments and draw according to field practice, every meter of best coal output is up to 0.4～0.7t, forming radius in coal seam is the cavity of 0.3～0.4m, and in implementation process mesopore, have little detonans, every day, with KBD-5 electromagnetic radiation instrument supervision and inspection, is drawn by Monitoring Data statistics: boring and cutting front electromagnetic radiation value meansigma methods is 34mV, and boring and cutting rear electromagnetic radiation meansigma methods is 19mV, brill cuts before rear electromagnetic radiation value is cut than brill and is substantially reduced, it was demonstrated that actually reach release effect.High-pressure hydraulic concordant is bored the enforcement cutting pressure relief method and is increased water component, decreases and presses number of times, reduces ground pressure strength.
It is clear that coal seam of the present invention high-pressure hydraulic concordant bores the processing step cutting pressure relief method, easy to operate, practical；By Reasonable Arrangement drilling hole column pitch and drilling depth, and coal body two helped and meets head on into a fixed angle of altitude enforcement boring, choosing best drilling depth simultaneously and implement slot operation, reach the release effect become apparent from so that actual job is more safe and reliable；By different hole depth position sections adopts difference bore mode of cutting, and reasonable distribution is bored and is cut the time, it is determined that best release scheme, improves brill and cuts speed, reduces brill and cut risk factor that may be present in operation；Additionally, high-pressure hydraulic concordant brill in coal seam of the present invention cuts pressure relief method and effectively shifts and reduce coal body 11 local stress, it is achieved high stress concentrations region entirety release effect, decrease and press number of times, ground pressure strength and destructiveness, it is ensured that safety in production.
It should be noted that; although the present invention has been described above with particularity; but the invention is not restricted to this; those skilled in the art can according to the present invention record in perhaps principle modify; therefore, all record according to the present invention in various amendments that perhaps principle carries out all should be understood to fall into protection scope of the present invention.
Claims (9)
1. the coal body high-pressure hydraulic concordant for reducing pressure visualization area, strong ore deposit coal body local stress is bored and is cut pressure relief method, it is characterised in that comprise the following steps:
1) multiple drilling hole position is laid on the surface helping coal body and coal body of meeting head in the high stress concentrations region two of driving face haulage gate respectively, keeps preset space length between adjacent drilling hole position；
2) adopt hydraulic drill rig that high stress concentrations region two is helped the drilling hole position of coal body and coal body of meeting head on drill, when drilling, two to help the drilling direction of coal body and coal body horizontal plane be 5 °～7 ° inclination angles, meet head on drilling direction and the coal body horizontal plane of coal body be 2 °～3 inclination angles, retreats brill when boring reaches projected depth；
3) after boring is accomplished fluently, drill rod end at described hydraulic drill rig connects ejector, ejector and drilling rod are sent in the boring accomplished fluently in the lump, make the feeding degree of depth and described two first preset distances helping the drilling orifice of coal body to keep 4～5m of ejector, make the feeding degree of depth of ejector keep second preset distance of 4～6m with the drilling orifice of described coal body of meeting head on；
4) open hydraulic drill rig, drive drilling rod and ejector rotates and carries out slot operation, in the coal body of high stress concentrations region, finally form release cavity, it is achieved the release of portion's coal body of playing a game in high stress concentrations region；
5) repeat the above steps 2)～step 4), implement respectively other drilling hole position to drill, slot operation, finally realize the release to whole coal body；
Wherein, step 4) described hydraulic slotted liner technique operation includes:
Whole section of coal body slot cutting is adopted within the scope of distance aperture 15～30m, and
The cutting of segmentation coal body slot is adopted within the scope of distance aperture 4～15m.
2. coal body high-pressure hydraulic concordant according to claim 1 is bored and is cut pressure relief method, it is characterized in that, described whole section of coal body slot is cut into ejector and moves along borehole axial and whole section of coal body is carried out uninterrupted radial cuts, ultimately forms the porous release cavity with certain diameter.
3. coal body high-pressure hydraulic concordant according to claim 2 is bored and is cut pressure relief method, it is characterized in that, described segmentation coal body slot is cut into ejector and moves along borehole axial, first to the uninterrupted radial cuts of a bit of coal body, form first disc type release cavity, move slot drilling rod afterwards and to another segment and uninterruptedly cut, form second disc type release cavity, repeat the above steps does the uninterrupted cutting of multiple segment, ultimately forms the disc type release cavity of some segments.
4. coal body high-pressure hydraulic concordant according to claim 3 is bored and is cut pressure relief method, it is characterised in that often the spacing of adjacent two described disc type release cavitys is 2～4m, and the coal output of each described disc type release cavity is 0.15～0.3t；The radius of described hole formula release cavity is 0.3～0.4m, and every meter of coal output is 0.4～0.7t.
5. coal body high-pressure hydraulic concordant according to claim 4 is bored and is cut pressure relief method, it is characterised in that often the spacing of adjacent two described disc type release cavitys is 2.5m.
6. coal body high-pressure hydraulic concordant according to claim 2 is bored and is cut pressure relief method, it is characterized in that, described whole section of coal body slot cutting and the cutting of described segmentation coal body slot be all contained on construction tunneling direction every meter no less than the static slot of 15min fixed point with no less than the slot step that before and after 10min, dynamic slot combines repeatedly, the static slot every meter of 15min fixed point is divided into 3 sections, and every slot period is no less than 5min.
7. coal body high-pressure hydraulic concordant according to claim 1 is bored and is cut pressure relief method, it is characterised in that
Step 1) described in preset space length be 3.2～5m；
Step 2) described in projected depth be 0～30m.
8. coal body high-pressure hydraulic concordant according to claim 7 is bored and is cut pressure relief method, it is characterised in that described first preset distance is 4m, and described second preset distance is 5m.
9. coal body high-pressure hydraulic concordant according to claim 1 is bored and is cut pressure relief method, it is characterised in that
Step 2) described in hydraulic drill rig be emulsification pump hydraulic drill rig；
Step 4) described in the pressure of slot operation be not less than 28MP.
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| CN201310103655.7A CN103161402B (en) | 2013-03-27 | 2013-03-27 | Coal seam high-pressure hydraulic concordant is bored and is cut pressure relief method |
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| CN106930691B (en) * | 2017-04-25 | 2018-09-28 | 山东科技大学 | A kind of drilling construction method in driving along next gob unloading blast hole |
| CN109898994A (en) * | 2019-03-21 | 2019-06-18 | 程领存 | A kind of coal seam pressure relief method and device thereof |
| CN110259377B (en) * | 2019-05-27 | 2022-04-19 | 天地科技股份有限公司 | Method for preventing and controlling coal and rock dynamic disasters of coal mine excavation roadway |
| CN117189112B (en) * | 2023-11-07 | 2024-01-12 | 中国矿业大学(北京) | System and method for directional drilling and reaming-different Kong Chuzha collaborative hole making and unloading control of residual coal pillar |
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| SE447502B (en) * | 1982-06-22 | 1986-11-17 | Cerac Inst Sa | FEEDING DEVICE AT THE MOUNTAIN DRILL CONDITION FOR DRILLING WITH SCREWS |
| CN102086760B (en) * | 2010-12-20 | 2013-02-20 | 郑州大学 | Method for mining coalbed methane through regional underground high-pressure hydraulic drilling and pressure relief |
| CN102966372B (en) * | 2012-12-17 | 2016-03-02 | 中国矿业大学 | A kind of complicated seam slot induced flow release anti-reflection method |
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| Title |
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| 松藻煤矿快速石门揭煤技术研究;龙建明等;《煤炭科学技术》;20110725;第39卷(第7期);第37页第3.2节及附图2、3 * |
| 高压水力割缝在孟津煤矿的应用;王迪;《硅谷》;20121123(第22期);第133页第1.2节 * |
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