摘要
针对察哈素煤矿开采过程中软岩煤巷受采动影响产生的围岩变形和支护困难问题,以3101回顺巷道变形为研究背景,分析巷道片帮和底臌机理,并在原支护方案的基础上设计改进支护方案。研究结果表明:巷道底板底鼓为膨胀-挠曲复合型底鼓,采用"补打底角锚杆+增加两帮支护密度+增加锚杆/索长度"、辅以局部强化支护的综合补强措施,可有效控制现场围岩变形和破坏。
In light of the coal roadway deformation in soft rock conditions with dynamic pressure influence during the process of mining in Chahasu coal mine, this research was made on the governance practices in No.3101 working face, the floor heave and spalling mechanism were analyzed and bolt-cable coupling improvement support projects were designed on the basis of the original support plan. The study result shows that it could reduce the impact of the surrounding rock pressure of two sides on the floor by increasing coal pillar size to 25 m, using 'add floor rock bolt & increase support density in two sides of roadway & enlarge anchor length' and supplementing by intensified support in local location comprehensive reinforced support means.
出处
《山东煤炭科技》
2016年第6期22-24,共3页
Shandong Coal Science and Technology
关键词
软岩煤巷
围岩控制
补强支护
煤柱宽度
Soft coal roadway
Surrounding rock control
Reinforced support
Coal pillar width
