【摘要】 铜坑矿在开采92号矿体的过程中,形成一个长达200m,且两侧均为采空区的条形矿柱。对该矿柱提出了3种深孔空场回采方案。各方案均采用向一侧采空区抛掷爆破的方式回采。经过对3种回采方案的分析比较,选择推荐了一种最优的方案,其采切工程简单、回采效率高、回采费用和贫化损失指标低。更多还原

【Abstract】 A 200 m long stripshaped pillar with two-side emptied stopes remained during mining 92# orebody in Tongken mine. Three kinds of longhole openstope pillar withdrawing plans are presented. All plans are that the throwtype blasting toward oneside emptied stope is used. Based on the analysis and comparison of three kinds of pillar withdrawing plans, an optimal plan is selected, featuring simple preparatory work and cutting operation, high efficiency of withdrawing, as well as low withdrawing cost and dilutionloss index.更多还原