基于钻孔电视探测的井筒围岩块体识别及其稳定性分析方法  

Identification and Stability Analysis Method of Surrounding Rock Mass in Shaft Based on Borehole TV Detection

作　　者：赵兴东[1] 周鑫[1] 赵一凡 陈洪年[2] ZHAO Xingdong;ZHOU Xin;ZHAO Yifan;CHEN Hongnian(Labrotary of Safe Mining in Deep Metal Mine,Northeastern University,Shenyang,Liaoning 110819,China;Shandong Lunan Geological Engineering Survey Institute,Jining,Shandong 272100,China)

机构地区：[1]东北大学深部金属矿采动安全实验室,辽宁沈阳110819 [2]山东省鲁南地质工程勘察院,山东济宁市272100

出　　处：《矿业研究与开发》2022年第10期169-172,共4页Mining Research and Development

基　　金：国家自然科学基金重点项目(52130403);国家自然科学基金山东联合基金项目(U1806208);中央高校基本科研业务费重点科学研究引导项目(N2001033).

摘　　要：深部地质构造与浅部相比更加复杂,获取精确的工程地质信息是深竖井安全、高效施工的关键。以新城金矿新主井-930~-946m段施工为背景,为获取新主井深部详细的地质信息,利用钻孔电视采集地质钻孔内的围岩表面节理图像,使用孔内电视图像分析软件对所采集的图像进行节理分析、处理,获得钻孔围岩节理面产状;应用Dips软件确定围岩优势节理产状,利用UnWedge对围岩潜在楔形块体进行稳定性分析,借此建立井筒围岩结构面识别及其稳定性分析方法。应用该方法对新城金矿新主井井筒进行稳定性分析,结果表明:在-930~-946m区间内块体安全系数最小为19.75,切割深度为1.01m,井筒围岩块体均处于稳定状态,无掉落风险。The geological structure in deep is more complex than that in shallow.Obtaining accurate engineering geological information is the key to the safe and efficient construction of deep shafts.Taking the construction of the new main shaft of Xincheng Gold Mine from-930 m to-946 m as the background,in order to obtain the detailed geological information of the new main shaft in deep,the borehole TV was used to collect the surface joint images of the surrounding rock in the geological borehole,and the borehole TV image analysis software was used to analyze and process the collected images to obtain the occurrence of the joint surface of the surrounding rock in borehole.Dips software was used to determine the dominant joint occurrence of surrounding rock,and UnWedge was used to analyze the stability of potential wedge-shaped blocks of surrounding rock,so as to establish the identification of structural surface of surrounding rock and its stability analysis method.The method was applied to the stability analysis of the new main shaft of Xincheng Gold Mine.The results show that the minimum safety factor of the block is 19.75 at the level of-930 m to-946 m,and the cutting depth is 1.01 m.The surrounding rock blocks of the shaft are in a stable state without falling risk.

关 键 词：钻孔电视 竖井掘进 围岩节理识别 节理分组 不稳定块体识别 

分 类 号：TD32[矿业工程—矿井建设] TU45[建筑科学—岩土工程]