“三下”开采胶结充填体强度对地表沉降的影响  

Influence of Cemented Filling Strength to “Three-under” Surface Subsidence

作　　者：徐飞[1,2] 石立[3] 

机构地区：[1]长沙矿山研究院有限责任公司,湖南长沙410012 [2]金属矿山安全技术国家重点实验室,湖南长沙410012 [3]广西壮族自治区国土资源厅,广西南宁530000

出　　处：《金属矿山》2016年第1期39-42,共4页Metal Mine

基　　金：金属矿山安全技术国家重点实验室开放基金项目(编号:2012KFJJ02)

摘　　要：针对"三下"采矿引起的地表沉降问题,结合全尾砂胶结充填材料试验,运用FLAC^(3D),对某"三下"铁锌矿充填采矿过程中不同强度的充填体引起的地表沉降变形情况进行综合分析。根据矿山岩体力学参数及相关试验结果,分别模拟不同充填体强度情况下的地表沉降变形情况,根据相关规范再对模拟结果进行优化。得出:当充填体强度为0.9 MPa时,可以保证地表沉降满足公路和河流的正常运行,能够保证采矿工作的顺利进行。According to the subsidence caused by ＂three-under ＂ mining disturbance, combined with the full tailings ce- mented material test, FLAC-3D is adopted to comprehensively analyze the surface subsidence and deformation caused by different strength of filling body in the backfill process of an iron-zinc mine. According to the mining rock mechanics parameters and the related experimental results, the settlement and deformation under different strength of the filling body are respectively simula- ted, and then the simulation results are optimized according to relevant criterion. It is determined that the strength of the filling body 0.8 MPa can guarantee the normal operation of the highway and the river with the surface settlement, and meanwhile en- sure the smooth mining.

关 键 词：地表沉降 “三下”开采 FLAC-3D 强度 

分 类 号：TD73[矿业工程—矿井通风与安全]