摘要
针对浅埋、中厚煤层的工程背景,采用实测分析、数值模拟、理论计算等方法,研究了护巷煤柱的矿山压力特征,确定了煤柱合理宽度。研究表明:浅埋中厚煤层矿山压力较小,巷道矿压显现较轻,煤柱宽度15～25m时,两侧采动应力未明显叠加,弹性核宽度较大;当煤柱宽度小于10m时,两侧采动应力叠加严重,弹性核宽度较小;开采深度80m,120m,160m时,煤柱合理宽度分别为12m,13m,14m。
Aiming at the background of shallow coal seams with medium thickness,this paper studied the stress characteristics of coal pillarsbetween panels applying field tests,numerical modeling and theoretical analyses,and determined the rational width of coal pillars.The results of this study showed： the stress in shallow coal seams is comparatively small,and the stability of roadways is less affected;when the width of the coal pillar is 15～25,the dynamic stress fields caused by mining from the pillar＇s both sides do not superpose,and the width of elastic band in the pillars is big;when the width of the coal pillar is less than 10m,the dynamic stress fields superpose significantly,and the width of elastic band in the pillars is small;when the mining depth is 80m,120m,160m,the rational width of the coal pillar is 12m,13m,14m respectively.
出处
《煤矿开采》
北大核心
2012年第4期105-108,共4页
Coal Mining Technology
基金
国家自然科学基金资助项目:浅埋深薄基岩采动岩体破断及渗流基础(51134018)
关键词
浅埋深
护巷煤柱
煤柱宽度
应力分布
shallow buried
coal pillars in the panel
width of the coal pillar
stress distribution
