| Citation: |
ZHANG Xingrun，PAN Bojie，ZHANG Yongbin，et al. Integrated prevention and control technology of unloading pressure from boreholes and high-efficiency extraction for compound power disasters[J]. Coal Science and Technology，2025，53（S1）：33−41. DOI: 10.12438/cst.2024-0941
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Addressing the technical challenges posed by the compound disaster of intense mining pressure and high gas concentration, this study developed a novel viscous sealing material based on cellulose ether. Experimental analyses were conducted to evaluate the expansion, water retention, and penetration capabilities of the sealing material. An integrated system for drilling pressure relief and efficient gas extraction prevention and control technology was established. The spacing of pressure relief sections and the effective extraction radius were determined under various conditions, optimizing technical parameters for integrated boreholes. The effectiveness of the technology in pressure relief and extraction was assessed, achieving multipurpose use of boreholes and simultaneous management of mining pressure and gas. Results indicate that the new viscous sealing material exhibits a 14.2% expansion coefficient, with only a 5% water loss rate over 30 days and a penetration radius up to 1.0 m, demonstrating superior expansion, water retention, and penetration performance. By combining pressure relief and extraction holes and strategically placing viscous sealing sections in stress concentration areas, the technology utilizes principles such as “solid sealing fluid, liquid sealing fluid” to ensure effective pressure sealing without compromising drilling efficacy. The spacing of pressure relief sections correlates inversely with mining pressure hazard levels and directly with borehole diameter, determined by drilling cuttings and borehole conditions. Extraction timings for different boreholes were determined using a differential pressure method, considering varying extraction radii and pressure relief effects. Evaluation of borehole pressure relief through surface displacement observations and drill cutting indicators confirms the technology effectively reduces mining pressure hazards and controls tunnel deformation. Integrating the new viscous sealing material in boreholes increased average gas extraction concentrations from 32.9% to 64.87%, nearly doubling the average pure gas flow rate, highlighting the effectiveness of the integrated drilling pressure relief and high-efficiency extraction technology in preventing and controlling complex dynamic disasters involving intense mining pressure and high gas levels. These findings provide crucial technical support for safe and efficient mining operations facing compound disasters.
| [1] |
袁亮. 我国深部煤与瓦斯共采战略思考[J]. 煤炭学报,2016,41(1):1−6.
YUAN Liang. Strategic thinking of simultaneous exploitation of coal and gas in deep mining[J]. Journal of China Coal Society,2016,41(1):1−6.
|
| [2] |
翟成,丛钰洲,陈爱坤,等. 中国煤矿瓦斯突出灾害治理的若干思考及展望[J]. 中国矿业大学学报,2023,52(6):1146−1161.
ZHAI Cheng,CONG Yuzhou,CHEN Aikun,et al. Reflection and prospect on the prevention of gas outburst disasters in China’s coal mines[J]. Journal of China University of Mining & Technology,2023,52(6):1146−1161.
|
| [3] |
张自政,柏建彪,王襄禹,等. 我国沿空留巷围岩控制技术研究进展与展望[J]. 煤炭学报,2023,48(11):3979−4000.
ZHANG Zizheng,BAI Jianbiao,WANG Xiangyu,et al. Review and development of surrounding rock control technology for gob-side entry retaining in China[J]. Journal of China Coal Society,2023,48(11):3979−4000.
|
| [4] |
柏建彪,张自政,王襄禹,等. 高水材料充填沿空留巷应力控制与围岩强化机理及应用[J]. 煤炭科学技术,2022,50(6):16−28.
BAI Jianbiao,ZHANG Zizheng,WANG Xiangyu,et al. Stress control and surrounding rock strengthening mechanism of gob-side entry retaining with high-water content material filling and its application[J]. Coal Science and Technology,2022,50(6):16−28.
|
| [5] |
李泉新,许超,刘建林,等. 煤矿井下全域化瓦斯抽采定向钻进关键技术与工程实践[J]. 煤炭学报,2022,47(8):3108−3116.
LI Quanxin,XU Chao,LIU Jianlin,et al. Key technology and practice of directional drilling for gas drainage in all the mining time and space in underground coal mine[J]. Journal of China Coal Society,2022,47(8):3108−3116.
|
| [6] |
聂百胜,马延崑,何学秋,等. 煤与瓦斯突出微观机理探索研究[J]. 中国矿业大学学报,2022,51(2):207−220.
NIE Baisheng,MA Yankun,HE Xueqiu,et al. Micro-scale mechanism of coal and gas outburst:A preliminary study[J]. Journal of China University of Mining & Technology,2022,51(2):207−220.
|
| [7] |
窦林名,田鑫元,曹安业,等. 我国煤矿冲击地压防治现状与难题[J]. 煤炭学报,2022,47(1):152−171.
DOU Linming,TIAN Xinyuan,CAO Anye,et al. Present situation and problems of coal mine rock burst prevention and control in China[J]. Journal of China Coal Society,2022,47(1):152−171.
|
| [8] |
ZHAO T B,GUO W Y,YU F H,et al. Numerical investigation of influences of drilling arrangements on the mechanical behavior and energy evolution of coal models[J]. Advances in Civil Engineering,2018,2018(1):3817397. doi: 10.1155/2018/3817397
|
| [9] |
贾传洋,蒋宇静,张学朋,等. 大直径钻孔卸压机理室内及数值试验研究[J]. 岩土工程学报,2017,39(6):1115−1122.
JIA Chuanyang,JIANG Yujing,ZHANG Xuepeng,et al. Laboratory and numerical experiments on pressure relief mechanism of large-diameter boreholes[J]. Chinese Journal of Geotechnical Engineering,2017,39(6):1115−1122.
|
| [10] |
王猛,司英涛,胡景宝,等. 深部巷道围岩卸压协调控制技术[J]. 河南理工大学学报(自然科学版),2017,36(5):9−16.
WANG Meng,SI Yingtao,HU Jingbao,et al. The coordination control technology of pressure relief and its application in deep roadway[J]. Journal of Henan Polytechnic University (Natural Science),2017,36(5):9−16.
|
| [11] |
刘天啸,闫帅,韩力. 高应力大变形巷道卸压让压联合控制技术[J]. 煤炭科学技术,2020,48(S2):269−276.
LIU Tianxiao,YAN Shuai,HAN Li. Joint control technology of pressure relief and yield in high stress and large deformation roadway[J]. Coal Science and Technology,2020,48(S2):269−276.
|
| [12] |
朱斯陶,董续凯,姜福兴,等. 硫磺沟煤矿巨厚强冲击煤层掘进工作面超前钻孔卸压失效机理研究[J]. 采矿与安全工程学报,2022,39(1):45−53.
ZHU Sitao,DONG Xukai,JIANG Fuxing,et al. Failure mechanism of pressure relief with advance drilling in driving face of strong burst ultra thick coal seam in Liuhuanggou coal mine[J]. Journal of Mining & Safety Engineering,2022,39(1):45−53.
|
| [13] |
康永水,耿志,刘滨,等. 煤矿深部巷道软弱围岩密集钻孔卸压技术与应用[J]. 岩石力学与工程学报,2024,43(S1):3187−3194.
KANG Yongshui,GENG Zhi,LIU Bin,et al. Application of intensive drilling technology for unloading pressure in soft and weak surrounding rocks in deep roadway of coal mine[J]. Chinese Journal of Rock Mechanics and Engineering,2024,43(S1):3187−3194.
|
| [14] |
张寅,尹立冬,张季平,等. 动力扰动下高应力巷道钻孔消能机制的数值研究[J]. 中国安全生产科学技术,2023,19(9):61−68.
ZHANG Yin,YIN Lidong,ZHANG Jiping,et al. Numerical study on energy dissipation mechanism of high stress tunnel borehole under dynamic disturbance[J]. Journal of Safety Science and Technology,2023,19(9):61−68.
|
| [15] |
于洋,柏建彪,王襄禹,等. 残留煤柱工作面巷道布置及卸压控制研究[J]. 煤炭学报,2020,45(S1):49−59.
YU Yang,BAI Jianbiao,WANG Xiangyu,et al. Study on roadway layout and pressure relief control of residual coal pillar working face[J]. Journal of China Coal Society,2020,45(S1):49−59.
|
| [16] |
杨宏民,任发科,王兆丰,等. 瓦斯抽采钻孔封孔质量检测及定量评价方法[J]. 煤炭学报,2019,44(S1):164−170.
YANG Hongmin,REN Fake,WANG Zhaofeng,et al. Quality inspection and quantitative evaluation method for borehole sealing in gas drainage[J]. Journal of China Coal Society,2019,44(S1):164−170.
|
| [17] |
王清峰,史书翰,辛德忠,等. 煤矿井下瓦斯抽采钻孔三段式自动封孔器研究[J]. 煤田地质与勘探,2023,51(9):147−155.
WANG Qingfeng,SHI Shuhan,XIN Dezhong,et al. Research on three-stage automatic hole packer for gas extraction drilling in underground coal mine[J]. Coal Geology & Exploration,2023,51(9):147−155.
|
| [18] |
马智会,潘荣锟,马智勇,等. 顺层钻孔瓦斯抽采漏气规律及封孔技术研究[J]. 煤炭科学技术,2020,48(8):90−96.
MA Zhihui,PAN Rongkun,MA Zhiyong,et al. Study on gas leakage law and hole sealing technology of gas drainage in layered drilling[J]. Coal Science and Technology,2020,48(8):90−96.
|
| [19] |
程健维,赵刚,刘雨涛,等. 瓦斯抽采钻孔非凝固材料性能与智能封孔装置研究[J]. 煤炭科学技术,2020,48(2):131−135.
CHENG Jianwei,ZHAO Gang,LIU Yutao,et al. Study on the properties of non-solidified materials and intelligent hole sealing device for gas drainage drilling[J]. Coal Science and Technology,2020,48(2):131−135.
|
| [20] |
张超,延婧,李树刚,等. 瓦斯抽采钻孔动态密封黏液型材料实验研究[J]. 采矿与安全工程学报,2022,39(5):1033−1040.
ZHANG Chao,YAN Jing,LI Shugang,et al. Experimental study on dynamic sealing of mucilage material in gas extraction borehole[J]. Journal of Mining & Safety Engineering,2022,39(5):1033−1040.
|
| [21] |
司磊磊,师伟峰,魏建平,等. 基于自修复效应的封孔材料裂隙自愈合特性[J]. 煤炭学报,2023,48(11):4097−4111.
SI Leilei,SHI Weifeng,WEI Jianping,et al. Self-healing characteristics of fracture in sealing materials based on self-healing effect[J]. Journal of China Coal Society,2023,48(11):4097−4111.
|
| [22] |
王小朋,林桂玲. 瓦斯抽采钻孔封孔用新型胶体材料性能及其封堵效果[J]. 矿业安全与环保,2019,46(5):56−59,65.
WANG Xiaopeng,LIN Guiling. Properties and sealing effect of new colloidal materials for drilling and sealing for gas extraction[J]. Mining Safety & Environmental Protection,2019,46(5):56−59,65.
|
| [23] |
宋吴兵,林柏泉,郝志勇,等. 瓦斯抽采钻孔新型高水材料封孔性能的研究与应用[J]. 煤炭工程,2015,47(9):94−96.
SONG Wubing,LIN Baiquan,HAO Zhiyong,et al. Research and application of new high water material sealing performance in gas drainage borehole[J]. Coal Engineering,2015,47(9):94−96.
|
| [24] |
张天军,包若羽,李树刚,等. 新型CF封孔材料膨胀及蠕变特性试验研究[J]. 采矿与安全工程学报,2019,36(1):175−183.
ZHANG Tianjun,BAO Ruoyu,LI Shugang,et al. Experimental study on expansion and creep characteristics of new CF sealing material[J]. Journal of Mining & Safety Engineering,2019,36(1):175−183.
|
| [25] |
翟成,向贤伟,余旭,等. 瓦斯抽采钻孔柔性膏体封孔材料封孔性能研究[J]. 中国矿业大学学报,2013,42(6):982−988.
ZHAI Cheng,XIANG Xianwei,YU Xu,et al. Sealing performance of flexible gel sealing material of gas drainage borehole[J]. Journal of China University of Mining & Technology,2013,42(6):982−988.
|
| [26] |
国家市场监督管理总局,国家标准化管理委员会. 冲击地压测定、监测与防治方法 第10部分:煤层钻孔卸压防治方法:GB/T 25217.10—2019[S]. 北京:中国标准出版社,2019.
|
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