白象山铁矿河床下开采地表沉降数值模拟分析  

Numerical Simulation Analysis of Ground Surface Subsidence During Mining of Baixiangshan Iron Mine under a Riverbed

作　　者：刘彦超[1] 陈轲[2] 蔡嗣经[1] 黄刚[1] 刘发平[2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]马钢(集团)控股有限公司姑山矿业公司,安徽马鞍山243184

出　　处：《金属矿山》2014年第11期54-57,共4页Metal Mine

基　　金：国家自然科学基金项目(编号:51204100)

摘　　要：针对设计采用嗣后充填采矿法的白象山铁矿的主矿体位于青山河床下的状况,为了保障矿山安全生产,采用数值模拟方法,对矿体、围岩及断层进行建模,对断层采用岩体弱化的方法建立模型,对于重点研究的地表和对结果有影响的断层进行细化网格的划分,并依据设计的连续倾斜进路尾砂充填法对模型进行开采与充填,分析地表沉降情况。通过计算分析,确定了位于地表河流中部即横坐标为400 m处的最大沉降值0.23 m。根据模拟结果,提出了对存在安全隐患的断层注浆加固的处理方法。经过再次运算得出最大沉降值减小到0.15 m,研究结果验证了采矿方法的安全可行性与注浆加固方法的安全有效性。In view of the mainore}aody of B-aixiangshan iron mine is located under Qingshan riverl In order to guarantee the safe mining, the numerical simulation method is used to build model of the ore body, surrounding rocks and faults. Faults model is built with rock weakening method. The surface and the faults with large influence are meshed, and then the caving and filling on the model are made by the continuously inclined drift stoping method with tailings backfilling to analyze the situation of surface subsidence. Through analysis and calculation, the maximum settlement value at the central river with the X-coordi- nate 400m is determined to be O. 23 m. According to the simulation results, an approach for grouting reinforcement of faults in risks was proposed. Through the calculation,the maximum settlement value is reduced to 0.15 m. The results verify the feasi- bility and safety of mining methods and the safety effectiveness of the grouting reinforcement method.

关 键 词：充填法采矿 数值模拟 地表沉降 注浆加固 

分 类 号：TD853[矿业工程—金属矿开采]