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The dynamic impact of rock burst induced by the fracture of the thick and hard key stratum

机译：厚重和密钥层骨折引起的岩爆动态影响

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摘要

To reveal the dynamic impact of rock bursting induced by the thick and hard roof of gravel as key stratum fractured, based on the key strata and rock control theories, combined with the mechanical load-based dynamic loading with the Law of Conservation of Energy in a system, this paper analysed the static stability and the processing of energy conversion within the system when the key stratum was fracturing. And the key stratum dynamic model of fracturing was established. The results indicate that large amounts of strain energy would be forced into the rock during the process as the key stratum fractures and becomes unstable. The greater the dynamic load factor is, the more elastic energy is forced into the lower rock strata of the key stratum, and the more obvious the dynamic impact of the lower rock strata would be. The size of the dynamic load factor relates to the aspect ratio of key rock masses, the thickness of the overburden, the mining height, the height of the fragmentized rock at the bottom of key stratum and the compaction coefficient of the fragmentized rock under the static during loading conditions. According to the calculation of actual work, the results are consistent with the field tests approximately. The results can provide references to similar conditions.
机译：为了揭示由砾石的厚度和硬顶引起的岩石爆裂的动态影响，作为裂缝的关键地层，基于关键的地层和岩石控制理论，结合了基于机械负荷的动态负载与储存的能量守恒系统，本文分析了静态稳定性和系统内能量转换的加工，当钥匙层进行压裂时。建立了压裂的关键地层动态模型。结果表明，在工艺期间，将在岩石中被迫进入岩石中的大量应变能量，并变得不稳定。动态负荷因子越大，强力越多地被迫进入钥匙层的下岩层，越明显的下岩层的动态撞击就越明显。动态载荷因子的尺寸涉及关键岩体的纵横比，覆盖层的厚度，矿山高度，折叠岩石底部的碎片化岩石的高度以及静态下碎片化岩石的压实系数在装载条件下。根据实际工作的计算，结果与现场测试一致。结果可以提供对类似条件的引用。

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