云南某铅锌矿采场护顶层回采方案优化研究  

Study on Optimization of Mining Scheme for Roof Protection of a Lead Zinc Mine in Yunnan Province

作　　者：李旺 刘洋[2] 李劼 LI Wang;LIU Yang;LI Jie(Chihong Technology and Engineering Co.,Ltd.,Qujing 655011,China;Faculty of Land Resources Engineering of KUST,Kunming 650093,China)

机构地区：[1]驰宏科技工程股份有限公司,曲靖655011 [2]昆明理工大学国土资源工程学院,昆明650093

出　　处：《价值工程》2020年第26期159-162,共4页Value Engineering

摘　　要：采场顶板的稳定是保障井下作业人员安全和降低矿石贫化损失的关键。针对该矿山氧化矿采场顶板不稳固、回采容易脱落等问题,采用了膏体充填法取代了原先的分层崩落法。为有效衔接两种方法的回采工艺,依据护顶层厚度、进路断面尺寸和支护钢架间距,提出4种护顶层回采设计参数,并采用数值分析方法对其采场护顶层的回采方案展开优化研究。数值计算分析表明:采用钢支架方案时,从其顶板的位移值和塑性区均显示进路为3m×3m,护顶层厚度1m、钢架间距0.5m为最优回采方案,不仅能够维护采场的基本稳定,同时大大提高了资源利用率,为矿山的安全生产提供了良好的作业环境,也为矿山带来良好的经济效益,对同类采场作业环境的回采设计提供了一定参考。The stability of stope roof is the key to ensure the safety of underground operators and reduce ore dilution loss.In view of the problems of unstable roof and easy falling off during stoping,paste filling method is adopted instead of the original slicing and caving method.In order to effectively connect the two methods of mining technology,according to the thickness of the top protection layer,the size of the access section and the support steel frame spacing,four mining design parameters of the top protection layer are proposed,and the numerical analysis method is used to optimize the stope top protection mining scheme.The numerical calculation and analysis show that:when adopting the steel support scheme,the displacement value and plastic zone of the roof show that the drift is 3m×3m,the thickness of the protective top layer is 1m,and the spacing between steel frames is 0.5m.It can not only maintain the basic stability of the stope,but also greatly improve the utilization rate of resources,which provides a good working environment for the safety production of the mine,and also brings good economic benefits for the mine and provides a certain reference for mining design of similar stope working environment.

关 键 词：护顶层回采 结构面调查 采场稳定 方案优化 

分 类 号：TD853.391[矿业工程—金属矿开采]