基于经验方法的铁矿深井围岩岩爆倾向性预测  

Prediction of Rockburst Proneness of Surrounding Rock in Iron Mine Based on Empirical Method

作　　者：朱永生 李振 梁久正[2] Zhu Yongsheng;Li Zhen;Liang Jiuzheng(HydroChina-Itasca R&D Center,Hangzhou 311122,P.R.China;China Petroleum Pipeline Engineering Corporation,Langfang,Hebei 065000,P.R.China)

机构地区：[1]浙江中科依泰斯卡岩石工程研发有限公司,杭州311122 [2]中国石油天然气管道工程有限公司,河北廊坊065000

出　　处：《地下空间与工程学报》2020年第2期591-598,共8页Chinese Journal of Underground Space and Engineering

摘　　要：岩爆是深埋工程建设面临的关键技术难题,岩爆风险的准确预测与评估至关重要。深埋矿山岩爆风险主要取决于围岩应力水平和围岩强度之间的矛盾,岩体条件(岩性、岩石强度、岩体完整程度)是岩爆发生的物质基础,是否产生岩爆和岩爆风险程度则主要取决于围岩应力水平和状态。某铁矿深井巷道群规模大、布置方案复杂,最大埋深达到接近2300 m,文中采用FLAC^3D软件平台编制了基于经验方法的通用性岩爆倾向性预测分析程序,评估了不同深度铁矿深井巷道群围岩的应力型破坏风险,并给出支护措施建议。研究所采用的分析技术和成果在国内具有一定首创性,特别适用于满足工程前期对地下洞室群围岩岩爆风险实现快速评估的现实需求。Rockburst is a key technical problem of the deep-buried engineering construction.Accurate prediction and evaluation of the risk of rock burst are very important.The risk of rockburst mainly depends on the contradiction between the stress level and the strength of rock mass.The rock mass conditions(lithology,strength,the integrity of rock mass)are the material basis,and the production of rockburst depends primarily on the stress level.A deepburied roadway group in an iron mine is large-scale and its layout is complex.The maximum depth of the roadway reaches to 2300 m.The scale difference brings great difficulties for numerical modeling.In this paper,FLAC^3D software is implemented to develop a universal program for the prediction of rockburst proneness based on empirical methods.The stress-induced failure of surrounding rock of deep-buried roadways in different depths is predicted.The analytical techniques and results adopted have certain originality in China and are particularly suitable for meeting the needs of the rapid assessment of the risk of rockburst in the early stage of the deep buried underground project.

关 键 词：深埋巷道群 经验性岩爆判据 岩爆分级 FLAC^3D 

分 类 号：O319.56[理学—一般力学与力学基础]