CAJ | 학술논문

露天转地下开采过程中边坡稳定问题是矿山安全生产的关键技术和核心难题之一。以工程实例为基础，应用离散元数值模拟，选取合适的力学参数，运用3DEC、Matlab等软件系统，分析了地下开采对高大边坡稳定性的影响机制、滑移特点和后续变形发展趋势。研究结果表明：受露天与地下开采两者的复合采动作用的影响，滑移变形产生了叠加作用，地表的下沉曲线形成多个大小不同的下沉盆地，导致不同区域边坡岩体变形破坏程度也不同。根据数值模拟结果可知：地下采区的不同开采阶段诱发的移动角大小不同，开采厚度不同，上覆岩体的破坏程度也不同。所以，露天转地下开采中，边坡稳定性主要受到采空区处理方式和开采厚度等多重因素的影响；在边坡稳定性评价时，需要结合具体开采情况进行分析和评价。
로천전지하개채과정중변파은정문제시광산안전생산적관건기술화핵심난제지일。이공정실례위기출，응용리산원수치모의，선취합괄적역학삼수，운용3DEC、Matlab등연건계통，분석료지하개채대고대변파은정성적영향궤제、활이특점화후속변형발전추세。연구결과표명：수로천여지하개채량자적복합채동작용적영향，활이변형산생료첩가작용，지표적하침곡선형성다개대소불동적하침분지，도치불동구역변파암체변형파배정도야불동。근거수치모의결과가지：지하채구적불동개채계단유발적이동각대소불동，개채후도불동，상복암체적파배정도야불동。소이，로천전지하개채중，변파은정성주요수도채공구처리방식화개채후도등다중인소적영향；재변파은정성평개시，수요결합구체개채정황진행분석화평개。
The slope stability during transition from opencast into underground mining is one of the key techniques and the core issues in safe mining production. Based on engineering project,the numerical simulation analysis of discrete element method is applied to select appropriate mechanical parameters. With the use of 3DEC,Matlab and other software systems,the slope stability,slip deformation characteristics and follow trends of high slopes at underground mining are analyzed. As the re-sult,Due to the combined impact of both underground mining and open-pit mining,the surface subsidence curves show as mul-tiple sink basins of different sizes under superposition,so the rock slope deformation extent at different regions are different. According to the results of numerical simulation,the mining-induced displacement angle at underground mining area are differ-ent at the different exploitation stage,indicating that with different mining thickness,the damage level of the overlying rock is different. So during the transition from opencast into underground mining,the slope stability is mainly impacted by multiple fac-tors such as goaf treatment and different mining thickness. Furthermore,the slope stability evaluation requires a combination of the specific circumstances of the mining.