围岩吸水对泥质弱胶结岩石巷道稳定性的影响  

The Influence of Water Absorption of Surrounding Rock on the Roadway Stability of Weakly Consolidated Argillaceous Rock

作　　者：赵维生 梁维 许猛堂 刘彬 ZHAO Weisheng;LIANG Wei;XU Mengtang;LIU Bin(Institute of Mining Engineering,Guizhou Institute of Technology,Guiyang,Guizhou 550003,China;Chongqing Research Institute Co.,Ltd,China Coal Technology and Engineering Group,Chongqing 400016,China)

机构地区：[1]贵州理工学院矿业工程学院,贵州贵阳550003 [2]中煤科工集团重庆设计研究院有限公司,重庆400016

出　　处：《矿业研究与开发》2020年第7期32-36,共5页Mining Research and Development

基　　金：贵州省科技计划项目(黔科合基础[2018]1061);贵州省教育厅青年科技人才成长项目(黔教合KY字[2017]219)。

摘　　要：针对泥质弱胶结岩石巷道开挖后的大变形问题,以内蒙古五间房西一矿为工程背景,基于弱胶结岩石常规物理与力学试验结果,建立4组不同吸水范围的泥质弱胶结巷道数值模型,分析围岩变形和塑性区随吸水范围的演化规律,并与围岩未吸水时的变形和塑性区进行对比分析,研究围岩吸水范围对巷道稳定性的影响。研究结果表明:岩石吸水后增大了围岩的塑性区范围,塑性区范围和塑性区体积随吸水范围的增加逐渐变大,但是地层的初始含水率仍然是影响巷道围岩塑性区大小的主控因素;围岩变形量随着吸水范围的增加近似线性递增,与围岩吸水层厚度从0~1m变化时的变形增量相比,变形增量随吸水范围的增加逐渐变缓。For the large deformation of roadway with weakly consolidated argillaceous rock after excavation,the Wujianfang-Xiyi mine in Inner Mongolia was taken as an engineering background for the research.Based on the routine physical test and mechanical test results of weakly consolidated argillaceous rock,four groups of roadway models with different water absorption range of weakly consolidated argillaceous rock were set up.The evolution law of deformation and plastic zone of surrounding rock with the range of water absorption was analyzed,and was compared with that of surrounding rock without water absorption to study the influence of the water absorption range of surrounding rock on the roadway stability.The results show that the plastic zone range of surrounding rock increases after the rock absorbs water,and the plastic zone range and volume gradually increase with the increase of the water absorption range.The initial water content of stratum is the main controlling factor affecting the plastic zone range of surrounding rock.The deformation of surrounding rock increases linearly with the increase of water absorption range.Compared with the deformation increment of surrounding rock when the thickness of water absorption layer changes from 0~1 m,the deformation increment gradually slows down with the increase of water absorption range.

关 键 词：泥质弱胶结岩石 巷道稳定性 围岩吸水 数值模拟 

分 类 号：TD322.4[矿业工程—矿井建设]