改进的Mathews稳定图法在新城金矿−530 m中段采场设计中的应用  

Application of improved Mathews stability diagram method in stope design of−530 m middle section of Xincheng Gold Mine

作　　者：舒帆 张敏思[1] 林才泽 刘恒 廖芳 SHU Fan;ZHANG Minsi;LIN Caize;LIU Heng;LIAO Fang(School of Civil&Architectural Engineering,East China University of Technology,Nanchang 330013,China)

机构地区：[1]东华理工大学土木与建筑工程学院,江西南昌330013

出　　处：《中国矿业》2024年第10期185-192,共8页China Mining Magazine

基　　金：国家自然科学基金项目资助(编号:51864001,52168055,52264003,51964002);江西省科技计划项目资助(编号:20212BCJ23003)。

摘　　要：在地下金属矿山开采中,采场结构参数的合理选择对于确保采矿安全至关重要。本文基于Mohr-Coulomb准则对Mathews稳定图法进行修正,提出了一个新的岩石应力系数Aʹ,以更准确地反映不同应力状态下岩石的破坏程度。针对新城金矿−530 m中段矿体断裂构造发育明显、岩层较破碎的特殊地质条件,采用改进的Mathews稳定图法确定最佳采场结构参数。计算结果显示,当采场长度为20 m时,最佳跨度为9 m。为进一步验证该方法的可靠性,利用FLAC^(3D)数值模拟软件对采场的应力分布、位移和塑性区进行了深入分析。模拟结果与改进的Mathews稳定图法计算结果高度一致,证实了所确定的结构参数的科学性和合理性。本文不仅展示了数值模拟与工程经验方法相结合在确定安全开采尺寸方面的有效性,同时也为新城金矿的安全开采提供了有力支撑。In underground metal mining,the rational selection of stope structure parameters is crucial to ensure mining safety.Based on the Mohr-Coulomb criterion,the Mathews stability diagram method is modified,and a new rock stress coefficient Aʹis proposed,which can better reflect the rock failure degree under different stress states.For the special geological conditions of the−530 m middle section ore body in Xincheng Gold Mine,where the fault structure is significantly developed and the rock strata are relatively fragmented,the improved Mathews stability diagram method is adopted to determine the optimal structure parameters of the stope.The calculation results show that the best span is 9 m when the stope length is 20 m.To further verify the reliability of the improved Mathews stability diagram method,FLAC^(3D)numerical simulation software is used to conduct a thorough analysis of the stress distribution,displacement,and plastic zone in the stope.The simulation results are highly consistent with the calculation results of the improved Mathews stability diagram method,confirming the scientificity and rationality of the determined structural parameters.This paper not only demonstrates the effectiveness of combining numerical simulation with engineering experience methods in determining safe mining dimensions but also provides strong support for the safe mining of Xincheng Gold Mine.

关 键 词：Mathews稳定图 采场 结构参数 FLAC3D 数值模拟 

分 类 号：TD853[矿业工程—金属矿开采]