千米深井孤岛工作面软岩巷道支护技术试验
Shandong Coal Science and Technology(2020)
Abstract
为有效控制孤岛工作面两巷围岩,对孤岛工作面煤柱留设进行了类比分析研究,确定孤岛工作面切眼煤柱30m、风巷煤柱20m、机巷煤柱15m;提出了锚网索联合支护,在煤柱侧进行深浅孔注浆加固方案.注浆加固后锚杆受力提高一倍,煤柱侧锚索受力提高45%,巷道底鼓量减少39%,煤柱侧位移减少27%,顶板下沉量和回采侧位移也均有减少.
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