强突出松软煤层气动定向钻孔超前卸压试验研究

doi:10. 11799/ ce202508009

摘要/Abstract

摘要：

针对在强突出松软煤层瓦斯治理中，采用常规的穿层液动回转钻进施工存在钻孔堵孔、瓦斯积聚、喷孔严重、瓦斯超限频发的问题，为保障区域瓦斯治理安全进行，通过全螺旋气动定向钻具选配，气动定向成孔工艺参数及松软煤层卸压掏煤技术研究，形成了一套气动定向钻孔配套掏煤卸压技术来进行超前卸压，并在九里山矿进行了现场试验。试验表明，采用气动定向钻进技术施工超前卸压钻孔可有效解决松软煤层堵孔和喷孔情况，试验期间未发生明显喷孔，通过多种掏煤技术组合的应用，每米掏煤干重超过0.1t，有效增大了卸压空间，提高了瓦斯抽采效果，监测期间前3个月单孔瓦斯抽采纯量均超过2.2万m³，控制范围理论瓦斯预抽率达37.97%，为后续区域瓦斯治理提供了安全保障。

关键词:

强突出 , 松软煤层 , 气动定向 , 掏煤技术 , 超前卸压

Abstract:

Aiming at gas control in strong outburst soft coal seam, there is a serious problems of hole block and methane accumulation and serious orifice and gas overflow frequently. In order to ensure the safety of regional gas management, through match the full spiral pneumatic directional drilling tool, research on technical parameters of pneumatic directional hole forming and coal cutting technology of soft coal seam with pressure relief, a set of pneumatic directional drilling supporting coal cutting pressure relief technology is formed to carry out advanced pressure relief, the field tests have been carried out in JIU Lishan Mine. Test shows that the use of pneumatic directional drilling technology in advance pressure relief drilling can effectively solve the problem of plugging and spraying holes in soft coal seams, no obvious orifice was found during the test. Through a variety of coal cutting technology combination application, the dry weight of coal per meter is more than 0.1t, effectively increase the pressure relief space and improved the gas extraction effect. In the first three months of the monitoring period, the net volume of gas extraction in a single hole exceeded 22,000 square meters, the theoretical gas pre-pumping rate of the control range is 37.97 , it provides a safety guarantee for the subsequent regional gas control.

中图分类号:

"> TD712

管强盛. 强突出松软煤层气动定向钻孔超前卸压试验研究[J]. 煤炭工程, 2025, 57(8): 57-63.

参考文献

[1]王恩元，张国锐，张超林，等. 我国煤与瓦斯突出防治理论技术研究进展与展望[J]. 煤炭学报，2022，47（1）：297-322.
WANG Eenyuan，ZHANG Guorui，ZHANG Chaolin，et al.Reasearch progress and prospect on theory and technology for coal and gas outburst control and protection in China[J]. Journal of China Coal Society，2022，47（1）：297-322.
[2]贾明魁，李学臣，郭艳飞，等. 定向长钻孔超前预抽煤层瓦斯区域治理技术[J]. 煤矿安全，2018，49（12）：68-71.
JIA Mingkui， LI Xuechen，GUO Yanfei，et al. Regional Control Technology for Gas Pre-drainage in Coal Seam by Directional Long Borehole[J]. Safety in Coal Mines，2018，49（12）：68-71.
[3]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.
[4]吴冬梅，赵伟，侍大军，等. 本煤层超前卸压瓦斯渗流规律的影响因素研究[J]. 煤矿安全，2019，50（4）：14-18.
WU Dongmei，ZHAO Wei，SHI Dajun，et al. Influencing Factors of Gas Seepage Flow in Advance Pressure Relief Area of a Mining Seam[J]. Safety in Coal Mines，2019，50（4）：14-18.
[5]张杰，王毅，黄寒静. 软煤气动螺杆钻具定向钻进技术与装备[J]. 煤田地质与勘探，2020，48（2）：36-41.
ZHANG Jie，WANG Yi，HUANG Hanjing. Directional drilling technology and equipment of pneumatic screw motor in soft seam[J]. Coal Geology & Exploration，2020，48（2）：36-41.
[6]王力，姚宁平，姚亚峰，等. 煤矿井下碎软煤层顺层钻完孔技术研究进展[J]. 煤田地质与勘探，2021，49（1）：285-296.
WANG Li，YAO Ningping，YAO Yafeng，et al. Research progress of drilling and borehole completion technologies in broken soft coal seam in underground coal mine[J]. Coal Geology & Exploration，2021，49(1)：285–296.
[7]张杰. 气动定向钻进技术在松软煤层条带瓦斯预抽中的应用[J]. 煤田地质与勘探，2021，49（3）：256-261.
ZHANG Jie. The application of pneumatic directional drilling technology in gas pre-drainage of strips in soft coal seams[J]. Coal Geology & Exploration，2021，49（3）：256-261.
[8]方俊，刘飞，李泉新，等. 煤矿井下碎软煤层空气复合定向钻进技术与装备[J]. 煤炭科学技术，2019，47（2）：224-229.
FANG Jun，LIU Fei，LI Quanxin，et al. Air compound directional drilling technology and equipment for soft－fragmentized seam underground coal mine[J]. Coal Science and Technology，2019，47（2）：151-158.
[9]刘飞，梁道富，刘建林，等. 碎软煤层空气复合定向钻进工艺技术[J]. 煤矿安全，2019，50（7）：116-119.
LIU Fei，LIANG Daofu，LIU Jianlin，et al. Air Compound Directional Drilling Technology in Broken Soft Seam[J]. Safety in Coal Mines，2019，50（7）：116-119.
[10]田宏亮，陈建，张杰，等. 淮南矿区软煤气动定向钻进技术与装备研究及应用[J]. 煤田地质与勘探，2022，50（10）：151-158.
TIAN Hongliang，CHEN Jian，ZHANG Jie，et al. Research and application of air-driven directional drilling technology and equipment in soft seam of Huainan mining area[J]. Coal Geology & Exploration，2022，50（10）：151-158.
[11]赵继展. 井下瓦斯抽采钻孔机械造穴技术研究[J]. 矿业安全与环保，2015，42（6）：66-68，72.
ZHAO Jizhan. Study of Mechanical Cavity －forming Technology for Underground Gas Drainage Hole Drilling[J]. MINING SAFETY & ENVIRONMENTAL PROTECTION，2015，42（6）：125-131.
[12]牟全斌. 我国煤层造穴增渗技术研究现状与进展[J]. 煤矿机械，2023，44（2）：65-68.
MOU Quanbin. Research Status and Progress of Cavitation Permeability-increasing Technology for Coal Seam in China[J]. Coal Mine Machinery，2023，44（2）：65-68.
[13]于宝种. 松软低透煤层高压射流造穴强化抽采技术研究[J]. 矿业安全与环保，2019，46（6）：42-46.
YU Baozhong. Enhanced Extraction Technology of High Pressure Jet in Soft and Low Permeability Coal Seam[J]. Ming Safety ＆ Environmental Protection，2019，46（6）：42-46.
[14]王海春，雷东记，代振华，等. 机械扩孔煤体增透应力变化规律研究[J].煤矿安全，2024，55（1）：28-33.
WANG Haichun，LEI Dongji，DAI Zhenhua，et al. Study on stress change law of coal body permeability improvement by mechanical reaming[J]. Safety in Coal Mines，2024，55（1）：28-33.
[15]魏启磊，杜晨军，冯小军. 风力卸压增透技术在提高“ 三软” 煤层瓦斯透气性方面的应用[J].煤炭科技，2023，44（3）：148-153.
WEI Qilei，DU Chenjun，FENG Xiaojun. Application of wind pressure relief and permeability enhancement technology in improving gas permeability of “Three Soft”coal seams[J]. COAL SCIENCE ＆ TECHNOLOGY MAGAZINE，2023，44（3）：148-153.
[16]刘勇，张汶定，陈长江，等. 松软煤层无水化增透理论及技术发展趋势[J/OL].煤炭学报.
LIU Yong，ZHANG Wending，CHEN Changjiang，et al. Prospects for the development of the theory and technology of non-hydration penetration enhancement in soft coal seams [J/OL]. Journal of China Coal Society.