摘要
通过初步理论计算与分析 ,把握在房柱开采中 4 #煤顶板及上方岩层跨落与煤柱受载等情况 ,以此为基本依据来确定 4
The rational technological parameters are determined for mining room and pillar in 4# coal seam bases under the conditions of the roof and the rock fall as well as the bearing load of the pillar ,considering the parimary calculation and analysis.
出处
《河北煤炭》
2001年第2期1-2,共2页
Hebei Coal
