大兴煤矿北一东采区2_(-3)煤上行开采数值模拟  

Numerical simulation on upward mining of n1e 2_(-3) coal seam in Daxing mine

作　　者：白国良 

机构地区：[1]中国煤炭科工集团唐山研究院有限公司,河北唐山063012

出　　处：《辽宁工程技术大学学报（自然科学版）》2014年第2期157-161,共5页Journal of Liaoning Technical University (Natural Science)

基　　金："十二五"国家科技支撑计划重点基金资助项目(2012BAC13B03)

摘　　要：针对铁煤集团大兴煤矿北一东2_(-3)煤层上行开采工程,采用FLAC^(3D)计算程序对2_(-3)煤层上行开采条件下煤层及顶底板塑性破坏、下沉、应力变化规律进行了数值模拟与分析结果表明:4_(-2)煤是2_(-3)煤层上行开采的主要影响煤层,下部4_(-2)与7_(-2)煤层工作面的交错布置及工作面跳采方式的应用使2_(-3)煤层的不均匀变形和应力集中现象得到有效改善,下部两煤层开采后2_(-3)煤层是连续的,未出现断失或台阶状下沉的现象,2_(-3)煤上行开采是可行的.The law of plastic failure, subsidence and stress were simulated and analyzed for 2.3 coal seam up mining with the FLAC3D software combining with the N1E coal seam upward mining engineering in Daxing Mine of Tiefa Coal Industry Group Co. Ltd. The results show that the 4.2 coal seam is the main impact coal seam of the upward mining, the inhomogeneous deformation and stress concentration phenomenon of 2-3 coal seam is effectively improved with the application of working face inner crossing layout and the skip-mining method during the lower 4.2 and 7.2 coal seam mining, 2-3 coal seam was continuous after the lower two seam mined out, no loss or step sinking phenomenon appeared at 2-3 coal seam. The project of 2-3 coal seam upward mining is feasible.

关 键 词：上行开采 FLAC^(3D) 数值模拟 塑性破坏 应力 变形 跳采 内错布置 

分 类 号：TD823[矿业工程—煤矿开采]