摘要
22202工作面为大柳塔矿22煤二盘区已回采的大采高综采工作面,22202工作面开采区域正上方为12煤房采采空区,12煤与22煤层间距25.8m^30.37m;在回顺14联行靠近2-2煤火烧边界顶帮煤层局部松散变软。根据22202工作面上方采空区煤柱的特点,运用FLAC3D建模分析不同煤柱情况下工作面开挖过程中煤壁超前应力分布特征、工作面开挖过程中上方采空区煤柱失稳特征和工作面顶板压力及下沉量,得出工作面超前应力分布规律及煤层顶板下沉量变化规律。
No. 22202 working face is a large-mining-height fully-mechanized mining face in the second panel, No. 22 coal seam, Daliuta Mine. The mining area of the No. 22202 working face is directly under the chamber mining goal of No. 12 coal seam. The interval between No. 12 and No. 22 coal seam ranges from 25.8 m to 30.37 m. The coal roof and wall turns loose at 2-2 coal fire boundary of No. 14 air return roadway. Based on the coal pillars of the goaf above the No. 22202 working face, FLACaD is used to analyze, under different coal pillars, pre-stress distribution of the coal wall, the instability of the coal pillars in the above goaf, and the stress and subsidence of the coal roof in order to achieve the pre-stress distribution and subsidence variation of the coal roof.
作者
李志伟
缑子锦
LI Zhiwei GOU Zijin(Dongfeng Coal Mine Co. , Ltd. , Shanxi Lanhua Group, Jincheng 048000, Chin)
出处
《山西煤炭》
2017年第3期4-7,22,共5页
Shanxi Coal
关键词
大柳塔矿
采空区煤柱
超前应力分布
煤矿失稳
下沉量
Daliuta Mine
coal pillars in goaf
pre-stress distribution
instability of mine
subsidence
