攀西某铁矿山无底柱分段崩落法覆盖层厚度分析与研究  

Analysis and research on cover thickness of non-pillar sublevel caving method in an iron mine in Panxi

作　　者：张良兵 冷建勇 李翠 陈涛 罗少琛 Zhang Liangbing;Leng Jianyong;Li Cui;Chen Tao;Luo Shaochen(Design and Research Institute of Mining Co.,Ltd.,Pangang Group,Panzhihua 617063,Sichuan,China)

机构地区：[1]攀钢集团矿业有限公司设计研究院,四川攀枝花617063

出　　处：《钢铁钒钛》2023年第5期48-52,共5页Iron Steel Vanadium Titanium

摘　　要：针对攀西某铁矿山露天转地下崩落法开采覆盖层合理厚度的确定问题,采用相似模型试验与数值模拟相结合的方式,分析研究了放矿过程中不同厚度覆盖层颗粒的运动速度、轨迹及覆盖层整体的沉降变化情况。结果表明,数值模拟结果与室内相似材料试验匹配程度高,覆盖层35、40 m时,表面起伏角度小,结构完整,均能满足矿山安全生产需要。结合安全规程,覆盖层厚度取40 m更安全、合理。Aiming at solving the problem of determining the reasonable thickness of the overburden layer in the conversion of open-pit to underground caving mining of the hanging wall ore body in an iron mine in Panxi,the Similarity Model test and Numerical Simulation were used to analyze and study the movement speed and trajectory of the overburden particles with different thicknesses during the ore drawing process and the settlement change of the whole overburden layer.The results show that the numerical simulation results are highly matched with the indoor similar material test.When the overburden layer is 35 m and 40 m,the surface fluctuation angle is small and the structure is complete,which can meet the needs of mine safety production.Combined with the safety regulations,it is safer and more reasonable to take 40 m as the thickness of the covering layer.

关 键 词：矿山 露天转地下 挂帮矿体 覆盖层 数值模拟 相似材料试验 

分 类 号：TD85[矿业工程—金属矿开采]