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随着有色冶金原料基地的发展,埋藏在深部的有用矿物矿床得到开发。开采这类矿床是比较复杂的,因为地压显现强烈,其中最危险的是冲击地压。在高应力条件下的弹性、脆性破坏的岩石区作业时,会发生冲击地压。岩石在未采动的岩体中处于各向受压的状态,当接近暴露面时,就转向平面或单轴受压状态。如果岩石能积聚大量压缩位能,则当应力值与岩石的单轴或双轴抗压强度相当时,巷道边界上或其附近可能出现岩石脆性破坏和破坏岩石的喷出。压缩位能积聚和脆性破坏的倾向
With the development of non-ferrous metallurgical raw material bases, valuable mineral deposits buried in the deep have been developed. Mining such deposits is more complicated because of the strong ground pressure, of which the most dangerous one is rockburst. Under high stress conditions of the elastic, brittle failure of the rock work area, there will be rock burst. Rock in the undecaled rock in the state of all compression, when approached the exposed surface, turned to plane or uniaxial compression state. If the rock can accumulate a large amount of compressive potential energy, brittle failure of rocks and destruction of rock discharge may occur at or near the roadway boundary when the stress is equivalent to the uniaxial or biaxial compressive strength of the rock. Compression potential can accumulate and tend to be brittle