关键词: 采矿工程, 地应力测量, 空心包体应力解除法, 应力状态特征

Abstract: In order to guarantee the smooth construction of the mining and supporting engineering in the secondary west mining area of Jinchuan Longshou Mine， an hollow inclusion stress relief method was adopted to obtain three dimensional stress data of 6 measuring points at the three horizontal roadways of 1 430 m， 1 514 m， and 1 610 m， and the section stress-ellipses at different normal directions of each site was drawn. The results showed that the maximum principal stress value is about 10~14 MPa in the depth range of 100-280 m underground， and it belongs to the medium stress level； The difference between the maximum and the minimum principal stress values in the measuring points of 2， 5， and 6 are relatively large， within the range of about 8.2~11.2 MPa； The KHh， KHV， and Kav of stress characteristic parameters are distributed within ranges of 1.43~4.81， 1.06~3.1， 0.88~2.28， respectively， and these are basically within the previous scopes； The maximum horizontal principal stress at each measuring point is higher than the vertical stress， and the tectonic stress is dominant in this region. However， according to the angle between the principal stress and the horizontal plane， it can be seen that the characteristics of the non-horizontal stress field begin to appear， indicating the in-situ stress in this area are complex； The directions of the maximum principal stress include two groups: NNE， the dominant direction， and NWW， of which the possibility in becoming the dominant direction of the new maximum principal stress， needs further in-situ stress measurement.

Key words: Mining engineering, In-situ stress measurement, Hollow inclusion stress relief method, Stress state characteristics