摘要
为了进一步研究煤柱上覆岩层的破断规律以及条带煤柱破坏失稳机理和过程,运用数值分析手段,建立煤柱两侧巷道开挖以后工作面开采前的数值模拟模型以及工作面开采后,煤柱上覆岩层破断后向下的跨落角为+60°、-60°时(双侧采动)的数值模拟模型;通过分析以上各模型条件下岩层的应力及位移变化规律,并且沿巷道顶板处取关键路径并对路径上各点的位移以及应力进行综合分析,得出顺槽煤柱上覆岩层压力显现特征。
To further study the fracturing law of overlying strata as well as the mechanism and process of failure and instability of strip coal pillars,we established two numerical simulation models of mining face before and after mining,respectively.The latter model is about the bilateral mining with caving angles（＋60degree and-60degree）after the overlying strata fracturing.On the analysis of stress and displacement of the two models,we could select the critical paths and then studied the displacement and stress of each point on the paths along the roof.Finally,the synthetic analysis achieved the pressure behavior of the overlying strata of the coal pillars.
作者
李辉峰
LI Huifeng(College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China Yuwu Coal Co. , Ltd. , Lu＇an Group, Changzhi 046103, China)
出处
《山西煤炭》
2017年第2期4-7,共4页
Shanxi Coal
关键词
保护煤柱
垮落
破断
数值模拟
protective coal pillars
collapsing
fracturing
numerical simulation
