上行开采围岩结构稳定性测试分析

Test and Analysis of Surrounding Rock Structure Stability in Upward Mining

为确保上行开采安全,根据何家塔煤矿多煤层地质采矿条件,在采动影响倍数法、"两带"判别法等传统上行开采可行性初步判断方法的基础上,进一步通过对上煤组已掘大巷内现状调查、地应力测试、围岩结构及强度测试等岩石力学现场测试等手段,综合论证了上行开采的可行性,得出:下煤层采空区对上煤层已掘大巷的稳定性没有明显的影响,上组煤可进行正常的上行开采。

In order to ensure the safety of upward mining, according to the geological mining conditions of multi-seam in Hejiata coal mine, on the basis of the preliminary judgment of the feasibility of traditional upward mining such as the mining impact multiple method and the "two-belt" discrimination method, it has further the survey of the status in the roadway and the field test of rock mechanics such as ground stress,the surrounding rock structure and the strength of the rock have comprehensively demonstrated the feasibility of upward mining. It is concluded that the goaf of the lower coal seam has no obvious stability to the excavated roadway of the upper coal seam. As a result, the upper coal can be mined normally.