基于数值模拟的不同工作面宽度下开采煤层底板流固耦合破坏规律研究  

Analysis of fluid-solid coupling failure rules of coal mine floor with different working face width based on numerical simulation

作　　者：宋春杰[1] 方可[1] 胡新宇[1] 胡松[1] 

机构地区：[1]铜仁学院农林工程与规划学院,贵州铜仁554300

出　　处：《贵州科学》2017年第1期68-73,共6页Guizhou Science

基　　金：贵州省科技厅联合基金项目(黔科合LH字[2014]7484)

摘　　要：随着煤矿开采业的迅速发展及规模的不断扩大,采煤工作面的宽度越来越宽。采用数值模拟的方法,综合考虑地质构造,煤层开采,矿山压力,含水层水压力等因素,从渗流与应力耦合作用的角度入手建立了底板含水层均布水压流固耦合模型。运用FLAC3D有限差分数值模拟软件对采动工作面底板进行数值模拟,分析了不同工作面宽度下采动煤层底板应力分布状态以及破坏特征和渗流特性。重点模拟工作面推进过程中不同工作面宽度下底板的变形,破坏区域,导升带高度变化情况,得出在进行采矿活动过程中,要在综合考虑多种因素前提下,选取合理的工作面宽度,以保证安全开采的结论。With the rapid development of coal mining industry and the continuous expansion of mine scale,the coal mining face becomes wider and wider.Based on numerical simulation method,and taking into account the factors of geologic structure,coal mining status,mine pressure,aquifer water pressure,etc.,we established the fluidsolid coupling model of the coal mining bottom aquifers starting with the coupling effect of seepage and stress.With the finite difference numerical simulation software FLAC3 D,we simulated the mining working face floor,and analyzed the stress distribution,failure characteristics and seepage characteristics of mine floor with different working face width.We focused on the simulation of the mine floor deformation,failure area,and height change of the guide belt with different working face width.In conclusion,in the process of mining,we should take various factors into consideration,and select a reasonable width of working face,so as to ensure safety mining.

关 键 词：工作面宽度 渗流应力 底板破坏 含水层 数值模拟 

分 类 号：TD821[矿业工程—煤矿开采]