赵楼煤矿1 000 m深孔水压致裂地应力测量及其应力场研究

 赵楼煤矿是目前国内开采最深的非金属矿山之一，处于曹县-郓城活动断裂带上，区内地质构造较为复杂。为了掌握矿区原岩应力场分布规律，应用深孔水压致裂地应力测量技术开展地应力测量工作，获得该矿区2个钻孔中16个测段的应力状态。测量结果表明：矿区最大主应力随深度增加基本呈线性增大，且在800 m深度处应力值有所变化，最大水平主应力为28.45～45.75 MPa，方向NEE，反映出矿区地应力场以水平应力为主导的特点，测量结果可为矿山建设和开采设计提供科学依据。

RESEARCH ON STRESS FIELD AND HYDRAULIC FRACTURING IN-SITU STRESS MEASUREMENT OF 1000 M DEEP HOLE IN ZHAOLOU COAL MINE

Zhaolou coal mine is one of the deepest mines in China. Its geological structure is more complex because it is located in Caoxian—Yuncheng active fault. In order to master the distribution law of in-situ stress field in the mine，the in-situ stress measurement is carried out by means of the hydraulic fracturing in-situ stress measurement technique. The stress states are obtained for 16 measuring sections in 2 holes. The measurement results show that the maximum principal stress increases linearly as the depth increases；and the in-situ stresses are varied around the depth of 800 m. The maximum horizontal principal stresses are 28.45–45.75 MPa；and their directions are NEE. It reflects that the horizontal stress is dominant in the stress field of the mine area. The proposed measurement results provide scientific basis for the mine construction and mining design.