摘要
针对我国深部煤炭开采瓦斯灾害防控难题,以淮南矿区潘三矿为研究对象,采用物理与数值模拟方法,揭示了邻近煤层及复合关键层对采空区瓦斯运移的影响机制。研究表明,邻近煤层(如13-1煤)通过覆岩裂隙向采空区持续涌入瓦斯,造成采空区高位瓦斯浓度升高;低位关键层之下形成空场、高位关键层之上形成低渗透区,导致瓦斯抽采效率降低、回风隅角瓦斯浓度高;提出低位关键层压裂、高位关键层下抽采卸压瓦斯的建议,以提高瓦斯抽采效率,保障煤矿安全生产。
In response to the the difficulties in preventing and controlling gas disaster in deep coal mining in China,taking the Pansan Mine in the Huainan mining area as the research object,using the physical and numerical simulation methods,the influence mechanism of adjacent coal seams and composite key layers on gas migration in goaf was revealed.The results showed that adjacent coal seams(e.g.,the 13-1 coal seam)continuously injected gas into the goaf through overlying rock fractures,leading to elevated gas concentrations in the upper regions of the goaf;an empty cavity formed beneath the lower key stratum,while a low permeability zone developed above the upper key stratum,leading to a decrease in gas extraction efficiency and high gas conentration in the return air corner;the sugges-tions for fracturing low-level key layers and extracting and releasing pressure gas from high-level key layers were proposed,which can improve gas extraction efficiency and ensure coal mine safety production.
作者
程斌
辛欣
Cheng Bin;Xin Xin(CCTEG Xi′an Research Institute(Group)Co.,Ltd.,Xi′an 710077,China)
出处
《能源与环保》
2025年第8期15-21,共7页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
基金
陕西省创新能力支撑计划项目(2024RS-CXTD-44)
中煤科工西安研究院(集团)有限公司科技创新基金项目(2024XAJS02)。
关键词
煤炭开采
瓦斯抽采
复合关键层
上邻近煤层
数值模拟
coal mining
gas extraction
composite key strata
upper adjacent coal seam
numerical simulation
作者简介
程斌(1989-),男,陕西西安人,助理研究员,硕士,2014年毕业于西安科技大学,现从事煤矿灾害治理方面的研究工作。
