夏甸金矿深部采动地压分布规律研究

Study on the distribution laws of mining ground pressure in the deep part of Xiadian Gold Mine

随着国内大部分矿区进入深部开采阶段,地压活动的发生率、频次和破坏程度显著提升,在开采过程中,围岩受扰动应力作用极容易发生垮塌,严重的还会有岩爆等动力灾害现象发生,给井下作业人员带来了较大的安全风险。本文以夏甸金矿为工程背景,在分析深部开采技术条件的基础上,将夏甸金矿深部采场采动地压作为研究对象,利用数值模拟方法,建立了整体采场模型和典型采场模型,分别对−620~−1120 m范围和−850~−1020 m范围内的采场采动地压分布规律进行研究,揭示了上向水平分层充填开采过程中应力场、位移变化和塑性区分布的特征,为夏甸金矿的安全生产提供了科学依据。

As most of the mines in our country enter into the deep mining stage,the incidence,frequency and damage degree of ground pressure activities have increased significantly,and in the process of mining,the peripheral rock is highly susceptible to landslides due to disturbing stress,and in serious cases,dynamic disaster phenomena such as rockbursts will occur,which poses a greater safety risk to the underground operators.This paper takes Xiadian Gold Mine as the engineering background,on the basis of analysing the technical conditions of deep mining,takes the mining ground pressure of deep quarry of Xiadian Gold Mine as the research object,uses the numerical simulation method,establishes the overall quarry and the typical quarry model,and researches the distribution laws of the quarry mining ground pressure within the ranges of−620 m to−1120 m and−850 m to−1020 m respectively.It reveals the characteristics of stress field,displacement change and plastic zone distribution in the process of stratified filling mining,which provides a scientific basis for the safe production of Xiadian Gold Mine.