【摘 要】
：
针对神东矿区活鸡兔井在沟谷地形下工作面动载矿压灾害问题,通过力学分析和物理模拟实验,就沟谷地形的坡角对工作面动载矿压的影响进行了研究.结果表明:当工作面推进到覆岩主
【机 构】
：
中国矿业大学煤炭资源与安全开采国家重点实验室,新疆大学地质与勘查工程学院
论文部分内容阅读
针对神东矿区活鸡兔井在沟谷地形下工作面动载矿压灾害问题,通过力学分析和物理模拟实验,就沟谷地形的坡角对工作面动载矿压的影响进行了研究.结果表明:当工作面推进到覆岩主关键层被侵蚀的沟谷地形时,临近上坡面的主关键层破断块体侧向水平挤压力作用较小；随坡角增大,主关键层上覆岩层载荷逐渐增大,块体结构不能满足砌体梁的“S-R”稳定条件而滑落失稳,使亚关键层结构块体承受的载荷迅速增大,导致工作面活柱急剧下缩片帮冒顶严重而发生动载矿压；当坡角小于15°时,工作面一般不会发生动载矿压显现灾害事故.理论分析和模拟结果与现场实测吻合良好.
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