CAJ | 학술논문

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6 kt/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.
삼산도금광신립광구시아국제일개빈해개채적금속광산,요사생산능력재안전개채적전제하체도6 kt/d,고강도개채세필우동원암지응력장,파배광암적은정성.통과광암、충전미사취양、시험급원암지응력장적측정,건립임의점적응력—응변강도절감과정여막이-고륜준칙조건하적안전계수법계산모형,계산출광산재동태회채과정중광암적안전계수급기상대응적겁한위이침강량.통과위기3년적현장빈해개채실천급다점위이계암이감측,결과표명:저침강광가식상향분층충전법、채장결구삼수、반구회채순서급안전계수법광암은정성분석、현장실시감측위빈해기암개채제공료기술지탱.
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.