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0.1 t,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m^(3),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。
In gas control in strong outburst soft coal seams,there are serious problems of hole block and methane accumulation and serious orifice and gas overflow frequently.In order to ensure the safety of regional gas control,through match the full spiral pneumatic directional drilling tool,research on technical parameters of pneumatic directional hole forming and coal unstuffing discharge technology of soft coal seam with pressure relief,a set of pneumatic directional drilling supporting coal unstuffing pressure relief technology is formed to carry out advance pressure relief,the field tests were carried out in Jiulishan Mine.The result shows that the use of pneumatic directional drilling technology in advance pressure relief drilling can effectively solve the problem of plugging and blowout in soft coal seam,and no obvious blowout was found during the test.Through a variety of coal unstuffing technology combination application,the dry weight of coal per meter is more than 0.1 t,effectively increases the pressure relief space and improves the gas extraction effect.In the first three months of the monitoring period,the net volume of gas extraction in a single hole exceeded 22000 square meters,the theoretical gas pre-pumping rate of the control range was 37.97.The technolgy has provided a safety guarantee for the subsequent regional gas control.
作者
管强盛
GUAN Qiangsheng(CCTEG Xi’an Research Institute(Group)Co.,Ltd.,Xi’an 710077,China)
出处
《煤炭工程》
北大核心
2025年第8期57-63,共7页
Coal Engineering
基金
陕西省自然科学基础研究计划项目(2023-JC-YB-341)
陕西省重点研发计划项目(2024GX-YBXM-486)
中煤科工集团西安研究院有限公司科技创新基金项目(2021XAYKF09)。
关键词
强突出
松软煤层
气动定向
掏煤技术
超前卸压
strong outburst
soft coal seam
dynamic directional drilling
coal unstuffing technique
advance pressure relief
作者简介
管强盛(1988-),男,湖北公安人,硕士,副研究员,现从事煤矿井下钻探技术研究及推广工作,E-mail:582337046@qq.com。
