基于FLAC^3D的条带开采煤柱稳定性分析
Stability Analysis of Strip Mining Coal Pillar based on FLAC^3D
郭仓 1谭志祥 1李培现 1邓喀中1
作者信息
- 1. 中国矿业大学／国土环境与灾害监测国家测绘局重点实验室／江苏省资源环境信息工程重点实验室
- 折叠
摘要
摘要为研究不同采出率开采条件下条带开采煤柱的稳定性及对地表的影响，采用了FLAC^3D和Tecplot数值模拟软件，对不同采留宽条带煤柱的竖直应力分布和地表最大下沉值进行研究。结果表明：随着采出率的增加，煤柱单位面积所支撑的压力成线性增大；在煤柱的边缘形成应力的集中区，其应力等值线的形状呈马鞍形-平台形-拱形的变化，平台形可以看成煤柱从稳定向失稳过度的标志和临界点；根据模拟计算结果，建立了地表最大下沉值与条带开采回采率之间的关系式及最大竖直应力与采出率之间的关系式，为今后相关计算提供了科学依据。
Abstract
To study the stability of strip mining coal pillar and influence to surface under the condi- tion of different recovery coefficient, numerical simulation software FLAC^3D and Tecplot were adopted, vertical stress distribution of different mining and pillar width strip coal pillar and maximum surface sub- sidence were studied. The results indicated： sustentive pressure of coal pillar per unit area presented lin- ear increase with the increase of recovery coefficient ; shape of stress isoline of stress concentration area at edge of coal pillar presented changes from saddle to platform shaped than arched, platform shaped could be judged as the mark and critical point from stability to instability of coal pillar; formula between maxi- mum surface subsidence and strip mining stoping rate and formula between maximum vertical stress and recovery coefficient were established based on simulation calculation results, provided scientific basis for relative calculation in future.
关键词
条带开采/FLAC^3D/Tecplot/煤柱稳定性Key words
Strip mining/FLAC^3D/Tecplot/Coal pillar stability引用本文复制引用
基金项目
国家自然科学基金(41071273)
国家自然科学基金(40772191)
出版年
2012
NETL
NSTL
万方数据