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The Failure and Falling of The Rock Mass in The Underground Mining

机译：地下采矿中岩体的破坏与倒塌

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In this paper, the process of failure and falling of the rock masses in the underground mining is studied; and the relationship between the processes of failure and falling of rock masses is proposed based on the rockmass strength theory. Research indicates that the failures of the rock and rock masses are probably not at all in common. Even though the rock masses go into the plastic condition, even to the extent that come into being in the failure, they do not surely fall. Hence, the mechanical properties of rock mass, especially after the failure, still need to be further researched. The laneway and the stope in the mining engineering are the temporary engineering, the load- carrying ability of the rock masses should be bought into play as far as possible, and therefore the stabilization during failure process is a significant for the supporting in the underground mine under safety prerequisite. Since 1 million m3 of the mined-out area is formed by mine for many year at Xishimen iron mine in China, and the gob roof is only 54m from the ground, the mined-out area is potentially dangerous to the underground mine. This paper analyzes the pattern of the stability and falling process in the mined-out area based on the theoretical analysis and numerical calculation, in order to obtains the falling criterion of the roof rock masses and stabilize the mined-out area. The predicted falling shape and range of the mined-out area is compared well with the in-situ observations. This contribution has also been popularized in many mines of China.
机译：本文研究了地下采矿中岩体的破坏和倾倒过程。基于岩体强度理论，提出了岩体破坏与跌落过程之间的关系。研究表明，岩石和岩体的破坏可能根本没有共同点。即使岩体处于可塑性状态，即使达到破坏的程度，它们也不一定会掉落。因此，岩体的力学性能，特别是在破坏后，仍需要进一步研究。采矿工程中的巷道和采场是临时工程，应尽可能发挥岩体的承载能力，因此在破坏过程中的稳定对于地下矿井的支撑具有重要意义。在安全前提下。由于中国西石门铁矿的采空区是由矿山形成的，开采年限为100万立方米，而采空区顶板距离地面仅54m，因此采空区对地下矿山具有潜在的危险。本文在理论分析和数值计算的基础上，对采空区的稳定性和塌方过程进行了分析，以求得屋面岩体的塌方判据，使采空区稳定。将预测的下降形状和采空区范围与原位观测结果进行了很好的比较。这一贡献在中国的许多煤矿中也得到了推广。

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