充填体下水平矿柱回采方案研究  

Study on Stoping Scheme of Horizontal Pillars under the Back-fill

作　　者：廖伟成[1] 刘波 张耀平[1,3] 徐佑民[1] 

机构地区：[1]江西理工大学资源与环境工程学院,江西赣州341000 [2]安徽龙桥矿业有限公司,安徽庐江231551 [3]江西理工大学应用科学学院,江西赣州341000

出　　处：《金属矿山》2015年第5期61-65,共5页Metal Mine

摘　　要：安庆铜矿在生产过程中为确保高中段回采安全,在-385^-400 m之间留有约15 m厚的水平矿柱。随着开采深度加大,预留矿柱量越来越多,为最大限度地回采矿石,现对水平矿柱进行回采。根据工程实际情况,对水平矿柱的回采方法提出上向中深孔嗣后充填,下向中深孔嗣后充填,上向进路分层充填3种方法,3种方法在回采效率和安全性上进行对比,着重考虑回采过程安全性,建议采用上向进路分层充填法进行回采。同时,针对上向充填法的回采顺序提出中间向两翼,左端向右端,右端向左端,两翼向中间等4个方案,耦合surpac与FLAC3D构建矿区数值模拟分析模型,对该4个方案在-385 m中段进行开挖模拟运算。分析结果得出:两翼向中间回采方案垂直位移量最小、最大拉应力较小、塑性区域最小,为最优回采方案。A horizontal pillar with 15 m of thickness was kept between -385 and -400 m to ensure the stoping safety ofhigh or medium section during production period in Anqing copper mine. With the mining deepening, more and more pillars arereserved. It＇s going to excavate these horizontal pillars in order to recover eopper mine as mueh as possible. Three mining plansincluding upward medium length hole stopping with subsequent back-fill, downward medium length hole stopping with subse-quent＂ baek-fill, and upward drift stopping method are proposed for the horizontal pillar mining according to the real working sit-uation. These three plans are contrasted from its efficiency and safety, especially safety. The upward medium length hole stop-ping with subsequent back-fill is recommended because of its safety. Four kinds of excavation orders are given for this plan,showing as from the middle to the side, from the left to the right, from the right to the left and from the side to the middle.Then, mine numerieal model is created based on FLAC3D and Surpae software to calculate the four excavation processes at -385m. The analysis shows that the vertical displacement, principle stress and plastic distribution are minimum by adopting the ex-cavation order from the side to the middle. So it is the optimal scheme.

关 键 词：水平矿柱 回采方案 数值模拟 

分 类 号：TD853.391[矿业工程—金属矿开采]