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大倾角超宽断面条件下切眼安全施工工程实践

Zhaohai LYU,Zhenfei ZHANG,Hua JIN,Tao LIU,Yaodong FENG,Jinhong ZHANG,Xiaojun YUE

Journal of North China Institute of Science and Technology（2020）

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Abstract
金家渠煤矿110302工作面切眼倾角36°～40°、断面跨度8.3～9.3m,综合分析大倾角、超宽断面、富含水层等条件因素,按'导硐'和'扩帮'两阶段作业,以减少巷道围岩扰动尺度,切眼导硐阶段选用'上山式'、扩帮阶段选用'下山式'的作业方式;并通过围岩极限平衡区范围确定了顶板载荷及'锚杆'加'锚索桁架'联合支护方案,该工艺安全可靠、巷道围岩变形可控,为工作面的如期安装创造了条件.
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