摘要
采用理论分析和三维有限差分数值模拟等手段,结合3g临界加速度判据,对济宁二号井八里铺断层以东、F_(56)^(12)断层以西孤岛工作面开采过程中硕板、煤柱和断层的活动规律进行分析。研究结果表明在工作面推进至约50 m、370 m及480 m时易发生顶板型冲击;工作面推进至10~130m阶段_(56)^(12)断层保护煤柱前方和推进至230~310 m阶段采煤面前方煤岩易发生煤柱冲击;在工作面推进至10~100m、150 m及180 m区域时,F_(56)^(12)断层附近易发生断层冲击。
Through theoretical analysis and three dimensional finite difference numerical simulation, and taking triple gravitational acceleration as critical acceleration criterion, the activity rules of roof, coal pillar and fault were analyzed in the process of mining in isolated working face which located to the east of Balipu fault and to the west of F56^12 fault in No. 2 mine of Jining Mine. The research results showed that when the face advanced about 50 m, 370 m and 480 m from the cut-hole, the rock burst caused by roof movement was easy to occur; The rock burst caused by coal pillar was easy to occur in the area in front o{ the protecting pillar of F56^12 fault when the face advanced 10-130 m from the cut-hole, and when the face advanced 230-310 m, this kind of rock burst was also easy to occur. When the face advanced 10-100 m, 150 m and 180 m, the rock burst caused by fault was easy to occur around the F56^12 fault.
出处
《中国煤炭》
北大核心
2016年第1期52-57,共6页
China Coal
关键词
近断层开采
孤岛工作面
冲击地压
数值模拟
冲击类型
时空特征
near-fauh exploitation, isolated bursting type, spatial-temporal feature working face, rock burst, numerical simulation,
