摘要
马兰矿12504和12503工作面间留设的窄小煤柱在经历12503回采时,煤柱上受有较大的载荷,但煤柱留设为8m时,其稳定性良好。窄小煤柱在工作面回采后,煤体上形成了大范围的破坏区,但破坏区域并未贯通,可适当对煤柱进行加强支护。12503工作面回采时,靠近采空区的回采巷道,尤其是靠近采空区的帮部和顶板,应该进行加强支护。
The small and narrow coal pillars beared larger loads, which were remained between N0.12504 coal face and N0.12503 coal face when mining NO.12503 coal face. When the coal pillars were remained 8m wide, their stability was good. After mining the coal face, the large damage areas was formed in the coal body, but the damage areas were not link up, the coal pillars were appropriately supported. When mining NO.12503 coal face, the mining roadways near the goaf, should reinforce support, especially at the side and roof near the goaf.
出处
《煤炭技术》
CAS
北大核心
2012年第10期67-69,共3页
Coal Technology
关键词
沿空留巷
煤柱
巷道
稳定性
数值计算
retaining roadway along goaf
coal pillar
roadway
stability
numerical simulation
