摘要
为了研究急倾斜煤层充填开采底板岩层移动的控制效果,基于龙湖煤矿南二采区急倾斜煤层的赋存条件,采用离散元UDEC数值计算,分析了急倾斜煤层采空区不充填和充填开采不同方式下底板岩层移动和应力分布特征。结果表明:急倾斜煤层开采底板岩层应力卸载区、应力降低区和支承压力区均呈非对称抛物线拱型分布;急倾斜煤层开采应力卸载角和卸载拱拱高均随煤层采厚的增加呈增大趋势;急倾斜煤层充填开采可以有效降低底板岩层卸载区、支承压力区范围和减小底板岩移,有利于急倾斜煤层采场围岩的稳定。
In order to study the control effect of the floor strata movement during the backfilled mining in the steep inclined seam, base on the deposit conditions of the steep inclined seam in South No. 2 Mining Block of Longhu Mine, the dispersed element UDEC numerical calculation was applied to analyze the floor strata movement and the stress distribution features of the goal in the steep inclined seam under the no backfilled mining and the baeld＇illed mining different methods. The results showed that the floor strata stress released zone, stress decreased zone and support pressure zone of the coal mining in the steep inclined seam would be in an asymmetrical parabolic arch distribution, the stress unloading angle and the unloading arch height of the coal mining in the steep inclined seams would be in a increased tendency with the thickness of the seam increased and the backfilled mining in the steep inclined seam could effectively reduce the scope of the floor strata unloading zone and the support pressure zone, could reduce the floor strata movement and be favorable to the stability of the surrounding rock in the coal mining face in the steep inclined seam.
出处
《煤炭工程》
北大核心
2012年第12期81-84,共4页
Coal Engineering
基金
国家重点基础研究发展计划(973)项目(2007CB209400)
关键词
急倾斜煤层
充填开采
应力分布
底板岩移
离散元
steep inclined seam
backfilled mining
stress distribution
floor strata movement
dispersed element
