【摘要】 针对安徽某矿区工程地质条件和大尺度采场结构参数的现状,按浅孔留矿法对计划回采采场进行数值模拟计算,对采场和矿柱的应力、位移及塑性变化进行预分析,结果表明,10#及11#采场上盘岩体均存在较大面积冒落的危险,回采过程中必须采取相应措施进行支护,9#采场顶板及上盘岩体稳固性较差,设计的采矿方案难以保证安全,提出改用下向扇形深孔分段空场法进行回采。更多还原

【Abstract】 According to the present situation of engineering geological conditions and structural parameters of large scale mining field in a mining area of Anhui,the numerical simulation was carried out on the planned mining field mined by short-hole shrinkage method.And the pre-analysis was carried out on stress,displacement and plastic variation about the mining field and the pillar.The analysis showed that the upper orebodies of No.10 and No.11 stope were in danger of falling in large areas,and corresponding measures should be taken during the mining process.The roof and the upper orebody of No.9stope were not stable,and the designed mining schemes were difficult to guarantee the safety,so that the deep hole high sublevel stoping method with down fan was recommended.更多还原