摘要
以五沟煤矿地质条件为背景,采用三维有限差分数值软件FLAC3D的固液耦合模式,在煤层埋深、岩溶溶洞顶面与煤层间距不同时,对煤层带压开采过程中煤层底板及岩溶溶洞周围岩体的应力及塑性破坏变化规律进行分析,结果表明:在其他工况条件相同时,煤层埋深越大,应力集中程度越大,煤层底板及岩溶溶洞周围岩体的塑性破坏越严重,越易发生突水事故;岩溶溶洞顶面与煤层间距越小,岩溶溶洞活化程度越高,越易发生突水事故,岩溶溶洞顶面与煤层间距对煤层底板及岩溶溶洞周围的垂向集中应力影响较小。
Based on geological condition of Wugou Mine, utilizing solid-liquid coupling mode of FLAC3D software to analyze stress and plastic failure change regularity of coal seam floor and karst carve surrounding rock during pressurized mining associat- ed with different mining depth and distances between carve top face and coal seam. The results indicated that when the coal seam is deeper, the stress is more concentrated, plastic failure of coal seam floor and karst carve surrounding rock is more serious, and water inrush accident is more likely to happen~ when the distance between carve top face and coal seam is smaller, activation ex- tent of karst carve is higher, and water inrush accident is more likely to happen. The distance between carve top face and coal seam has little influence on vertical concentrated stress of coal seam floor and surroundings of karst carves.
作者
杨耀文
阚忠辉
解建
刘世方
Yang Yaowen Kan Zhonghui Xie Jian Liu Shifang(Wugou Mine, Anhui Hengyuan Coal-electricity Group Co. , Ltd. , Suzhou, Anhui 234000, China College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China)
出处
《中国煤炭》
北大核心
2017年第2期97-99,113,共4页
China Coal
基金
国家自然基金项目(51379119
51109124
51509149
41472281)
教育部博士点新教师基金项目(20113718120009)
山东省高等学校优秀骨干教师国际合作培养项目
煤矿安全高效开采省部共建教育部重点实验室开放基金(JYBSYS2014106)
"群星计划"重点项目(qx2013102)
关键词
突水事故
煤层埋深
岩溶溶洞
带压开采
垂向集中应力
数值模拟
water inrush accident, coal seam depth, karst carve, pressurized mining, certical concentrated stress, numerical simulation
