灵新煤矿深部六采区地应力分布规律研究及其工程应用

Study and Engineering Applications on Geostress Distribution Law of the Sixth Deep District in Lingxin Coal Mine

为了研究灵新煤矿深部六采区的地应力分布规律及其对巷道支护的影响,采用小孔径水压致裂地应力测试装备与方法,对灵新煤矿六采区8个测点进行地应力的测量,得到了8个测点的地应力大小与方向分布。测量结果表明,磁窑堡向斜构造对灵新煤矿六采区地应力分布特征起主导作用;以+985 m水平为分界点,+985 m水平以浅为低应力区,+985 m水平以深为中等应力区;建立了灵新煤矿六采区最大水平主应力与最小水平主应力随与磁窑堡向斜轴距离变化关系;优化了灵新煤矿六采区回采巷道支护方案。

In order to study on geostress distribution law and its influence on roadway supportof the sixth deep district in Lingxin coal mine,a geostress measurement equipment and method of small diameter borehole hydraulic fracturing are used to measure the geostress of 8 measuring points in the sixth district of Lingxin coal mine,and the magnitude and direction distribution of the geostressof 8 measuring points are obtained.The results show that the syncline structure of Ciyaobao plays a leading role in the distribution characteristics of geostress in the sixth district of Lingxin coal mine.The boundary point is+985 m level,above+985 m level is low stress zone,and below+985 m level is medium stress zone.The relationship between the max horizontal principal stress and min horizontal principal stress in the sixth district of Lingxin coal mine is established with the deviation of the inclined wheelbase of Ciyaobao.The support scheme of roadway is optimizedin the sixth district of Lingxin coal mine.