摘要
一、工作面顶底板情况及生产条件合山局柳矿621回采面位于该矿斜井西翼,开采水平为±0至-60m,上覆顶板岩层平均厚度为150m,开采煤层为四煤上层,煤层平均厚度为1.7m,倾角约7°,f=1～2,上覆顶板岩层主要由燧石灰岩组成。各煤、岩层情况见图1。621回采工作面采用倾斜长壁式仰斜采煤法。
Aiming at the soft floor in the district of He shan Mining Administration, authors of thepaper practically measured the ground pressureon Face 621at Liu mine by means of groundpressure observation to make clear the move-ment regularity of the strata above the upperlayer of Seam 4. Based on the regularity thesupporting parameters and roof control methodwere determined. Besides, by analysing thesinking of prop into the floor, that causes theroof control difficult,authors of the paper putforward the corresponding prevention measures.
出处
《矿山压力与顶板管理》
1992年第4期52-57,81,共6页
Ground Pressure and Strata Control
