摘要
以浅埋煤层的高家梁煤矿为背景,采用FLAC3D数值模拟方法研究近距离煤层层间距、下层煤的采高以及间隔层岩层强度对覆岩导水裂隙带发育高度的影响。结果表明:当层间距大于10 m时,覆岩裂隙带发育最大高度主要受上层煤开采影响;当层间距小于10 m时,覆岩导水裂隙带高度开始受下层煤开采影响明显增大;当下层煤采高在5 m以内时,导水裂隙带发育高度较小,采高超过5 m时,导水裂隙带高度迅速增大;导水裂隙带高度随间隔层岩层强度的增加而增大。灰色关联分析表明,影响导水裂隙带发育高度因素按重要程度依次为采高、间隔层强度、层间距。
Taking the shallow buried coal seam in Gaojialiang Coal Mine as the background, the effect of interlayer spacing of close distance coal seams, the mining height of lower coal and strength of bay level on the development height of water following fractured zone were studied by using FLAC^3D. The resuhs show that when the spacing of layers is more than 10 m, the strata development maxi- mum height of fractured zone is mainly affected by the upper coal mining; opposite, the development height is affected by lower coal mining obviously; the water following fractured zone are smaller when the lower eoal~ height within 5 m; contrary, it increases quiekly; the water fractured zone height increases with the increasing of spacer layer of rock strength. The grey correlation analysis shows that the factors influencing the following fractured zone height are mining heights, the strength of bay level, the interlayer spacing of close distance coal seams in turn.
出处
《煤矿安全》
CAS
北大核心
2014年第11期45-47,52,共4页
Safety in Coal Mines
基金
国家自然科学基金资助项目(51274133)
山东省自然重点基金资助项目(ZR2012EEZ002)
教育部博士点基金资助项目(20123718110013)
山东科技大学"矿山压力与岩层控制"创新团队基金资助项目(2010KYTD105)
关键词
近距离煤层
导水裂隙带
影响因素
灰色关联分析
层间距
close distance coal seam
water flowing fractured zone
influencing factor
grey correlation analysis
space of layers
