不同采厚对采场覆岩移动变形的影响分析

Influence of different mining thickness on movement deformation of stope rock

根据山西华宁焦煤有限责任公司22109工作面的覆岩结构特点,在收集相关资料的基础上,运用MIDAS GTS NX有限元数值模拟软件分析在不同采高、相同工作面长度的条件下顶板上覆岩层的应力、位移变化规律。研究表明,随着开采厚度和工作面推进距离的增加,工作面覆岩支承压力峰值逐渐变大;至工作面中线距离越远,支承压力峰值越低;开采厚度越大,顶板下沉值越大。

According to the structural characteristics of eroded rock in 22109 working face of Shanxi Huaning Coking Coal Co.,,based on the collection of relevant data,MIDAS GTS NX finite element numerical simulation software was used to analyze the stress and displacement variation of eroded rock on the roof under the conditions of different mining heights and the same working face length.The research shows that with the increase of mining thickness and working face advancing distance,the peak value of abutment pressure of working face rock gradually increases.The farther the distance to the middle line of working face,the lower the peak value of abutment pressure;the greater the mining thickness,the greater the roof subsidence value.