College of Civil Engineering, North China University of Technology
AVIC Construction Group

在充分考虑地下采区多次重复采动的基础上对东露天矿的延深开采进行数值模拟计算,分析数值模拟结果,研究井工转露天开采诱发边坡滑移机制,分析井工开采对露天边坡的影响,并通过计算沉降与位移,分析可知,地下采区受露天矿开采诱发的活化影响对边坡的稳定性影响增大;由于活化效应,坑底矢量方向基本指向地下采空区方向,上部不同区域合成后矢量指向不同,说明放顶煤开采地下采空区的空间受连续活化影响,空隙空间逐渐减小,剩余空间继续压密;随着边坡的不断开采,当边坡位于主断面下山方向一侧时,矢量合成后应力作用增大,对边坡的稳定性产生不利影响;而当边坡位于主断面上山方向一侧时,二者矢量合成后,会有一部分应力相互抵消,这对边坡的稳定性是有利的。

of extended deep mining of the east open pit, study the mechanism of slope slip induced by shaft-transferred open pit min-ing, analyze the influence of shaft mining on open pit slope, and calculate the settlement and displacement. The resultsshow: The influence of the activation induced by open pit mining on the stability of the slope increases. Due to the activationeffect, the pit bottom vector direction basically points to the underground goaf direction, integrated vector points differently indifferent regions in the upper part, indicating that the space of underground goaf for top coal mining is affected by continuousactivation, the void space gradually decreases, the remaining space continues to press tight. With the continuous mining ofthe slope, when the slope is located on the descending direction side of the main section, the stress effect increases after thevector synthesis, which adversely affects the stability of the slope; when the slope is located on the uphill direction side of themain section, after the synthesis of both vectors, some of the stresses will offset each other, which is beneficial for the slopestability.

组织科研(2023YZKY01);国家自然基金课题(41772335)