充填开采充填率与地表移动规律的数值模拟研究  

Study on numerical simulation of filling rate and surface subsidence in backfill mining

作　　者：贾林刚[1] 刘卓然[1] 

机构地区：[1]天地科技股份有限公司开采设计事业部,北京100013

出　　处：《辽宁工程技术大学学报（自然科学版）》2015年第9期1010-1015,共6页Journal of Liaoning Technical University (Natural Science)

基　　金：天地科技股份有限公司项目(KJ-2013-TDKC-12)

摘　　要：为研究充填开采重要参数充填率与地表移动变形之间的关系,结合某煤矿工作面,采用FLAC3D数值模拟方法,对充填开采不同充填率条件下地表沉降规律进行了模拟计算.结果表明:充填率与下沉系数呈指数关系,与水平变形和倾斜变形呈二次函数关系,与曲率变形为指数关系;当充填率增加时,地表变形快速减小,当充填率增加到80%以上时,地表下沉及变形值减小幅度趋缓;充填开采有效改善了围岩力学环境,不同的充填率影响了覆岩"三带"的岩体力学性质,使得下沉系数及地表变形与充填率呈非线性关系.本文结论对充填开采控制地表变形,保护地面建筑物具有一定的理论参考价值和实践指导意义.For studying the relationship between filling rate and the surface movement and deformation of backfill mining, the paper based on the coal mine working face, used FLAC3D numerical simulation method, and studied on simulations of the surface subsidence and movement laws under the different filling rate in backfill mining. Research shows that filling rate and the subsidence coefficient exponential relationship, a two function relation with the horizontal deformation and inclination deformation, and the curvature deformation was exponential relation. When the filling rate increases, the surface deformation decreases rapidly, and when the filling rate increases to more than 80%, the surface subsidence and deformation decreases steeply. Filling mining can effectively improve the mechanical environment of surrounding rock, and different filling rate effect the rock ＂three zone＂, so that the deformation is nonlinear between in the filling rate and surface subsidence.

关 键 词：充填开采 充填率 数值模拟 地表变形 围岩应力 

分 类 号：TD823[矿业工程—煤矿开采]