多年冻土层覆盖矿井开采上限实验研究

Study on Rational Exploiting Elevation Limit of Coal Mine with Permafrost Layer

矿井开采上限不但对矿井生产安全、资源回收率具有重要影响,也对有效控制和减小煤炭地下开采对环境损害程度具有重要影响。提出了多年冻土层覆盖下矿井合理开采上限的确定原则,采用相似材料模拟实验方法研究了覆岩及多年冻土层的破坏特征和采动裂隙带发育特征,得出矿井合理开采上限为+3 760 m。这一结果已经被实际采用。

Not only the exploiting elevation rational limit of the mine has an important influence for the producing safety and resource recovery, but also for effectively to control and reduce the damaged degree of the ecological environment due by the underground mining. It is put forward that the principles to determine the exploiting elevation rational limit of the mine with the permafrost layer, and based on the mining fracture characteristics are researched by the similar material simulation experiment, it is found that the exploiting elevation rational limit of the mine is +3 760 m. This result has been actually used.