河下开采覆岩破坏规律物理模拟研究

Physical simulation study on the pattern of destroy of the covering rock from mining beneath riverbed

西天河下采煤是涉及矿井生产安全和环境安全的技术难题,开采扰动造成的采空区上覆围岩动力失稳很容易演化为衍生灾害,其失稳表现为具有时间效应特征的一个动态过程。采用相似材料模拟实验对开采引起的覆岩断裂破坏和地表移动规律进行预计与分析,其结果为L3414综采工作面制定开采方案提供有力依据,最终实现了安全开采。

Mining beneath riverbed is a technical problem involved with the security of both mining and the environment. The dynamical unbalance of covering rocks above the mining hollow, which is brought from disorder from mining, is quite apt to turn into derivational calamity. This kind of unbalance behaves as a dynamical process with temporal domino offect. Based on simulating experiments on similar material, our study analyzes and forecasts the destroy pattern of covering rock fracture and earth＇s surface movement brought from mining. The conclusion of our study provides potent support for the design of mining scheme of L3414 integrated mining working-face beneath the Xitianhe riverbed, and leads to practical secure mining eventually.