大直径深孔爆破采场破顶层安全厚度研究  

Study on Security Broken Top Thickness of Large-diameter Deep Hole Blasting Stope

作　　者：王婷玉[1] 罗周全[1] 齐飞祥 秦亚光[1] 彭东[1] 

机构地区：[1]中南大学资源与安全工程学院,长沙410083

出　　处：《世界科技研究与发展》2016年第1期40-44,共5页World Sci-Tech R&D

基　　金：国家自然科学基金(51274250)资助

摘　　要：为了研究大直径深孔爆破采场破顶层厚度不舍理带来的安全生产问题,以凡口矿某采场为例,通过第一强度理论计算出破顶层安全厚度初始值为6.95 m;然后综合运用Surpac与FLAC3D构建采场数值模型,并对采场回采过程中不同破顶层厚度进行优化模拟,分析并揭示了采场回采过程中围岩的力学状态,确定了采场的破顶层安全厚度为7 m。根据理论计算及数值优化结果,结舍现场工程应用,验证了理论分析与数值模拟结论的合理性,可以为其它大直径深孔爆破采场破顶层安全厚度研究提供借鉴。The aim is to determine the reasonable thickness of the broken top layer,with a case study in Fankou Mine Stope. Firstly, the safety thickness of broken top was calculated through the maximum tension stress theory;the solid model of the stope was constructed through SURPAC and FLAC3D, different broken top thickness of mining process was simulated, the mechanics state of mining field was revealed during mining, the reasonable thickness of the broken top layer was deter- mined. Finally, according to the results of theoretical calculation and numerical simulation, and combining the engineering practice of Fankou Lead Zinc Mine, the rationality of theoretical analysis and numerical simulation were further verified, it can provide a reference for the safety thickness of the top layer study of other large-diameter deep hole blasting stope.

关 键 词：安全厚度 数值模拟 位移场 塑性区 破顶层 理论计算 

分 类 号：TD235[矿业工程—矿井建设]