复杂开采环境下采场失稳垮塌过程分析  

Instability process of the cut slopes under complex mining environment

作　　者：罗周全[1] 秦亚光[1] 谢承煜[1] 汪伟[1] 

机构地区：[1]中南大学资源与安全工程学院,湖南长沙410083

出　　处：《中国地质灾害与防治学报》2015年第3期81-85,共5页The Chinese Journal of Geological Hazard and Control

基　　金：国家自然科学基金资助(51274250);中南大学中央高校基本科研业务费专项资金(2013zzts061)

摘　　要：针对金属矿山采场失稳垮塌动态变化过程监测困难的问题,结合某地下大型铅锌矿山某中段主矿体失稳垮塌的工程实际,运用真实破裂过程分析软件(RFPA2D)仿真采场动态破坏过程,对采场周边充填体动态垮塌过程、范围及程度进行了分析研究。得到如下结论:(1)开挖采场充填体与矿体接触面首先出现松动垮塌,随后该采场周边采场出现大范围的松动,最后发生垮塌。(2)紧邻开挖采场的空区以及充填体强度较小的空区失稳垮塌比较严重,最大垮落高度达10 m;(3)从开挖采场底部向两边采场出现一个"V"字型剪切破坏区域,垮塌区内高强度充填体以剪切破坏为主,低强度充填体以拉伸破坏为主。In view of the problem that instability process of cut slope. Surrounding stope caused by stope instability was difficult to monitoring,combined with the actual situation of main ore body collapse caused by exploitation stope instability of one stage in a large underground lead-zinc mine and reasons of collapse analyzed,dynamic failure process of the surrounding stopes simulated through the realistic failure process analysis software（ RFPA2D） which can reflect the dynamic process of change,and collapse range,damage degree and the main failure forms of surrounding stopes analyzed and studied. Studies show that：（ 1） contact surface of filling body and ore body first collapse besides the exploitation stope,then circumjacent stope appear big range of loose,and finally collapse occurred;（ 2） goaf close to the exploitation stope and have lowstrength filling body collapsed seriously,the maximum value of collapse height is about 10 m;,simulation results of collapse trends of stopes and filling body surrounding the exploitation stope has a good coincide with field measurement;（ 3） collapse area showing ＂V＂-shaped structure from the exploitation stope excavation bottom,failure structure of high-strength filling body was mainly shear failure and low-strength filling body failure structure was mainly tensile failure through acoustic emission figure analysis. The results provide a basis for reasonable filling and mining method determination in late security recovery of hidden resource.

关 键 词：复杂环境 失稳垮塌 RFPA2D 隐患资源 

分 类 号：X936[环境科学与工程—安全科学]