Seepage Characteristics and Influencing Factors of Weakly Consolidated Rocks in Triaxial Compression Test under Mining-Induced Stress Path

The rock of weakly consolidated coal measure strata has the characteristics low mechanical strength and strong water sensitivity. Under stress seepage disturbance caused by seam mining, surrounding structure is prone to instability, which leads mine safety accidents resources loss. In order master response permeability evolution law under specimens Jurassic mudstone, sandy sandstone in Ili mining area China were collected, a triaxial compression test was carried out. A comprehensive analysis out on mineral composition microstructure rock. results show following: (1) Compared constant confining pressure condition, mining-induced promotes fracture development rate rocks. ratios strain at yield point are 0.33, 0.43, 0.79, respectively, failure 0.48, 0.52, 0.72, respectively. (2) condition stress, change range recovery three types rocks different, decreased sandstone. (3) process test, there hysteresis with increase clay content. (4) Combined characteristics, it believed that minerals after mud swelling main reasons for rock, content factor affecting