采动过程中逆断层的活化突水是影响煤矿安全生产的主要因素之一,首先运用SPSS软件建立了以断层倾角(A)、断层落差(B)、含水层水压(C)、破碎带宽度(D)、保护煤柱宽度(E)5个因素每个因素5个水平的正交模拟试验表,然后运用FLAC(3D)进行数值模拟研究分别考查逆断层在不同正交试验方案下断层带同一位置处的最大剪应力。最后运用极差分析法和方差分析法对试验结果进行分析。结果表明:(1)以上5个因素对试验结果的影响程度由强到弱依次是C〉A〉B〉E〉D。(2)断层带最大剪应力分别随着断层落差、含水层水压、破碎带宽度的增加而增加,随着保护煤柱宽度和断层倾角的增大而减小,但当破碎带宽度达到某一数值后断层带最大剪应力基本维持在一个相对稳定的状态,这说明断层破碎带宽度对逆断层活化的影响是有一定限度的。
The reverse fault water inrush during mining is one of the main factors affecting the safety of coal mine production. Firstly, SPSS software was used to establish an orthogonal simulation test table, in which 5 factors were included, such as the dip of fault (A), the fault distance (B), the pressure of aquifer (C), the width of fracture zone (D), and the width of protec- tive coal pillar (E), and each factor had 5 levels. Then, FLAC3D was applied for numerical simulation research on the maxi- mum shear stress at the same position of fault zone, when the reverse faults were in different orthogonal test scheme. The test- ed results were analyzed by range analysis method and variance analysis method. The results were obtained as follows. The or- der of above five factors that impacted on the test results from strong to weak was C〉A〉B〉E〉D. The maximum shear of fault zone respectively increased with the increase of the fault distance, the pressure of aquifer and the width of fracture zone, and decreased with the increase of the width of protective coal pillar and the dip of fault. When the width of fracture zone reached a certain value, the maximum shear stress would remain in a relatively stable state, which indicated that the width of fracture zone had a limited effect on the inverse fault activation.