Safe mining technology of undersea metal mine  

金属矿滨海基岩的安全开采技术(英文)

作　　者：彭康[1,2] 李夕兵[1,2] 万串串[1,2] 彭述权[1,2] 赵国彦[1,2] 

机构地区：[1]中南大学资源与安全工程学院,长沙410083 [2]中南大学深部金属矿产开发与灾害控制湖南省重点实验室,长沙410083

出　　处：《Transactions of Nonferrous Metals Society of China》2012年第3期740-746,共7页中国有色金属学报（英文版）

基　　金：Project(10872218) supported by the National Natural Science Foundation of China;Project(2010CB732004) supported by the National Key Basic Research Program of China;Project(20090461022) supported by the National Postdoctoral Foundation of China;Project (11MX21) supported by the Students' Innovation Project Aubsidize Award of Arcelor Mittal

摘　　要：Xinli district of Sanshandao Gold Mine is the first subsea metal mine in China.To achieve 6 kt/d production capacity under the premise of safe mining,high-intensity mining might destroy the in-situ stress filed and the stability of rockmass.According to sampling and testing of ore-rock and backfill and in-situ stress field measurement,safety factor method calculation model based on stress-strain strength reduction at arbitrary points and Mohr-Coulomb yield criterion was established and limit displacement subsidence values under the safety factor of different limit stoping steps were calculated.The results from three years in-situ mining and strata movement monitoring using multi-point displacements meter showed that the lower settlement frame stope hierarchical level filling mining method,mining sequence are reasonable and rockmass stability evaluation using safety factor method,in-situ real-time monitoring can provide the technical foundation for the safety of seabed mining.三山岛金矿新立矿区是我国第一个滨海开采的金属矿山,要使生产能力在安全开采的前提下达到6kt/d,高强度开采势必扰动原岩地应力场,破坏矿岩的稳定性。通过矿岩、充填尾砂取样、试验及原岩地应力场的测定,建立任意点的应力—应变强度折减过程与莫尔-库仑准则条件下的安全系数法计算模型,计算出矿山在动态回采过程中矿岩的安全系数及其相对应的极限位移沉降量。通过为期3年的现场滨海开采实践及多点位移计岩移监测,结果表明:低沉降框架式上向分层充填法、采场结构参数、盘区回采顺序及安全系数法矿岩稳定性分析、现场实时监测为滨海基岩开采提供了技术支撑。

关 键 词：subsea bedrock mining frame stope upward horizontal slicing and filling mining method safety factor method multi-point displacement measurement 

分 类 号：TD863[矿业工程—金属矿开采]