文献类型：期刊文献

中文题名：地层含水率对弱胶结软岩巷道围岩稳定性的影响:以内蒙古五间房西一煤矿为例

英文题名：Influence of moisture content on surrounding rock stability of weakly consolidated soft rock roadway:a case study of Xiyi coal mine of Wujianfang in Inner Mongolia

作者：赵维生 梁维 王海 寇帅

第一作者：赵维生

机构：[1]贵州理工学院矿业工程学院,贵州贵阳550003

第一机构：贵州理工学院矿业工程学院

年份：2020

卷号：29

期号：11

起止页码：154-159

中文期刊名：中国矿业

外文期刊名：China Mining Magazine

收录：CSTPCD;;北大核心:【北大核心2017】；

基金：贵州省科技计划项目资助(编号:黔科合支撑〔2019〕2882号,黔科合基础〔2018〕1061,黔科合平台人才〔2017〕5789-12,黔科合平台人才〔2017〕5789-14);贵州省教育厅青年科技人才成长项目资助(黔教合KY字〔2017〕219,黔教合KY字〔2016〕227)。

语种：中文

中文关键词：地层含水率;弱胶结软岩;围岩稳定性;数值模拟

外文关键词：formation water content;weakly consolidated rock;stability of surrounding rock;numerical simulation

摘要：针对弱胶结软岩的力学性能受含水率影响大,以及在弱胶结地层中开挖巷道后围岩变形大的特点,以内蒙古五间房西一煤矿为工程背景,基于弱胶结软岩的室内力学试验、XRD矿物衍射分析和液塑限联合测定结果,建立5组不同含水率地层的数值仿真模型,分析弱胶结地层含水率分别为2%、5%、10%、15%和18%时开挖巷道后的围岩稳定性。研究结果表明:当地层含水率较低(≤5%)时,围岩塑性厚度和塑性区体积几乎没有变化,随着地层含水率的增加,围岩塑性厚度和塑性区体积近似呈线性增加;弱胶结地层中巷道围岩的最大变形发生在顶底板,往巷道两帮走,变形逐渐降低,围岩变形随着地层含水率的增加近似呈线性递增,但围岩的主要变形区间受地层含水率的影响不明显。
For weakly consolidated soft rock mechanical properties affected by the moisture content is big,and after the excavation roadway in weakly consolidated formation of the characteristics of big deformation of surrounding rock in Xiyi coal mine of Wujianfang mining area in Inner Mongolia as the engineering background,based on the weakly consolidated soft rock mechanics test,XRD diffraction analysis of minerals and liquid plastic limit determination results,moisture content of five groups of different strata of the numerical simulation model is established,the analysis of weak cementation formation water content are 2%,5%,10%,15%and 18%when the stability of surrounding rock after excavation of roadway.The results show that the plastic thickness and volume of surrounding rock are almost unchanged when the aquifer content is lower(≤5%).With the increase of the aquifer content,the plastic thickness and volume of surrounding rock are approximately linearly increased.In the weakly consolidated strata,the maximum deformation of roadway surrounding rock occurs in the roof and floor,and gradually decreases when walking to the two sides of the roadway.The deformation of surrounding rock approximately increases linearly with the increase of formation moisture content,but the main deformation interval of surrounding rock is not significantly affected by formation moisture content.