地应力测量在夜长坪钼矿区的应用研究

Application research on geo-stress measurements in the Yechangping molybdenum mine

随着夜长坪钼矿开采深度的逐渐加深,地压危害日益显著,测量该区地应力的分布规律,可为矿山的进一步开采设计和安全生产提供基础资料。研究采用先进、可靠的套孔应力解除法进行地应力测量,分析得出夜长坪钼矿区最大主应力的倾角(与水平面的夹角)大部分较小,位于近水平方向,方向表现出较好的一致性,均为北北东向,3个主应力均随着深度的增加而增加,并且呈近似线性的增长关系。

With the increasing of mining depth of Yechangping molybdenum mine,the harm of ground pressure has been becoming more and more serious.Determining the distribution of ground stress in this mine can provide reliable basic data for mining design and safety production in future.The study carries out geo-stress measurement with the advanced and reliable method of trepan boring stress relief.Measuring results show that most of the dip angles of the maximum principal stress with the horizontal surface are small.And the maximum principal stress locates in near horizontal direction,which indicates good consistency and all of them are in NNE direction.Three principal stresses increase with the depth increasing and appear near linear relationships in Yechangping molybdenum mine.