星村矿深部采区地应力分布特征及与地质构造关系研究  

In-situ stress distribution characteristics and its relationship with geological structure in Xingcun mine

作　　者：王炯[1,2] 姜健 张正俊 高韧 刘帅 WANG Jiong;JIANG Jian;ZHANG Zhengjun;GAO Ren;LIU Shuai(State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining&Technology(Beijing),Beijing 100083,China;School of Mechanics&Civil Engineering,China University of Mining&Technology(Beijing),Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)深部岩土力学与地下工程国家重点实验室,北京100083 [2]中国矿业大学(北京)力学与建筑工程学院,北京100083

出　　处：《采矿与安全工程学报》2019年第6期1240-1246,共7页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(51574248);国家重点研发计划项目(2016YFC0600901)

摘　　要：深部采区地质应力环境复杂,对巷道围岩大变形破坏影响突出,因此,对深部采区进行地应力测量,分析地应力场分布特征对巷道设计与维护具有重要意义。星村矿最大开采深度已超过1300 m,西翼深部采区轨道及回风大巷均发生非对称大变形破坏问题。为了研究其破坏机理并针对性治理,现场采用空芯包体应力解除法对矿区2条大巷的4个测点进行了地应力原位测量。结果表明:1)每个测点均有2个主应力方向接近水平,另一主应力方向接近于垂直;2)实测最大水平主应力是自重应力的1.60~1.67倍,表明应力场是以水平构造应力为主导,且均为压应力;3)各测点垂向应力基本等于或大于上覆岩层重量;4)实测最大主应力平均方位角为129.8°,方向呈NW-SE向。同时结合地应力场与地质构造关系分析认为,该地区郯庐断裂对矿区的构造有控制作用,区域构造应力场的方向与实测最大主应力方向结果相一致。The geological stress environment in deep mining area is complex, which has a prominent influence on the large deformation and failure of roadway surrounding rock. Therefore, it is of great significance to measure the in-situ stress of the deep mining area and analyze the distribution characteristics of in-situ stress field. The maximum mining depth of Xingcun mine has exceeded 1 300 m, and asymmetric large deformation and damage problems have occurred in the orbital and ventilation roadway of the west wing deep mining area. In order to study the failure mechanism and control the large deformation and failure of roadway, the in-situ measurement of in-situ stress at 4 measuring points of two roadways in the mining area has been carried out with the method of stress relief of hollow core inclusion. The results have shown that:1) There are two main stress directions close to the horizontal at each measuring point, and the other principal stress direction is close to vertical. 2) The measured maximum horizontal principal stress is 1.60~1.67 times of gravity stress, indicating that the stress field is dominated by horizontal tectonic stress and all are compressive stress. 3) The gravity stress of each measuring point is substantially equal to or bigger than the weight of the overburden. 4) The measured maximum azimuth of the principal stress is 129.8°, and the direction is NW-SE. At the same time, combined with the analysis of the relationship between geo-stress field and geological structure, it is believed that the Tanlu Fault plays a controlling role in the structure of the mining area. The direction of the regional tectonic stress field is consistent with the measured maximum principal stress direction.

关 键 词：地应力 深部开采 空芯包体应力解除法 地质构造 

分 类 号：TD31[矿业工程—矿井建设]