摘要
为了揭示煤层群开采煤柱集中应力与地表下沉破坏的耦合控制关系,以柠条塔煤矿北翼东区浅埋煤层群为背景,采用UDEC软件计算了不同煤柱错距和工作面走向错距时的覆岩应力场、破坏区和位移场的关系,确定了兼顾减缓地下煤柱集中应力和地表裂隙控制的工作面区段煤柱合理错距和同采工作面合理错距。数值计算表明,柠条塔煤矿1-2煤层与2^-2煤层合理区段煤柱错距为40 m,2^-2煤层工作面与1-2煤层工作面走向错距应大于80 m。
In order to reveal the coupling control relationship between the concentrated stress of coal pillars and the subsidence failure of the surface in coal seam group mining,taking the shallow coal seam group mining in Ningtiaota coal mine as the background,using UDEC software,the stress field,failure area and displacement field of overburden rock under different coal pillar staggered distance and working face strike staggered distance are calculated,and the reasonable coal pillar staggered distance between working faces and the reasonable staggered distance of the mining faces are determined.The numerical calculation shows that the reasonable coal pillar staggered distance between 1-2 coal seam and 2^-2 coal seam is 40 m,and the strike staggered distance between 2^-2 coal seam working face and 1-2 coal seam working face should be more than 80 m in Ningtiaota coal mine.
作者
刘辉
陈菲
冯雄
LIU Hui;CHEN Fei;FENG Xiong(Shaanxi Coal Group Shenmu Ningtiaota Mining Co. ,Ltd. ,Yulin 719300,China)
出处
《陕西煤炭》
2020年第5期83-87,共5页
Shaanxi Coal
关键词
煤层群
煤柱错距
数值计算
煤柱应力
coal seam group
coal pillar staggered distance
numerical calculation
coal pillar stress
