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Study on the stress rock burst of coal (rock) considering the impact of depth and dip angle[J].计算力学学报,2018,35(6):719~724

Study on the stress rock burst of coal (rock) considering the impact of depth and dip angle
Study on the stress rock burst of coal (rock) considering the impact of depth and dip angle

DOI：10.7511/jslx20161112003

 作者 单位 E-mail 崔铁军 辽宁工程技术大学 安全科学与工程学院, 阜新 123000矿山热动力灾害与防治教育部重点实验室, 阜新 123000大连交通大学 辽宁省隧道与地下结构工程技术研究中心, 大连 116028 ctj.159@163.com 李莎莎 辽宁工程技术大学 安全科学与工程学院, 阜新 123000矿山热动力灾害与防治教育部重点实验室, 阜新 123000 王来贵 辽宁工程技术大学 力学与工程学院, 阜新 123000 马云东 大连交通大学 辽宁省隧道与地下结构工程技术研究中心, 大连 116028

为了研究不同埋深和煤岩倾角对煤岩体开采引起的压应力型冲击地压过程，利用颗粒流方法进行冲击地压模拟。煤岩体与顶板倾角工况设置为7种，分别为0°，5°，10°，15°，20°，30°和40°；煤岩层埋深深度设置为8种，分别为-120 m~-820 m，间隔100 m。在上述56种工况下进行压应力型冲击地压过程模拟，计算至平衡时统计飞石颗粒数量和变形颗粒数量，研究这两个数量与埋深和倾角之间的关系。结果表明，飞石数量和变形颗粒数量与埋深均为幂函数关系，前者随倾角增加幂次数增加且均大于1，后者随倾角增加幂次数增加但均小于1；在深度不变时两者数量增长与倾角为线性关系，且随着深度增加，斜率和截距均增加。

In order to study the process of stress rock burst of coal (rock) by mining,considering the influence of depths and dip angles,the process is simulated with PFC.7 cases of different angles between coal are considered,respectively:0°,5°,10°,15°,20°,30°,40°.There 8 cases of coal strata depths,respectively:from -120 m to -820 m,at 100 m apart.The stress rock burst of coal (rock) processes are simulated in the above 56 cases.The numbers of the flying particle and the deformation particle are counted when calculating balance.The relationship between the two numbers and the depths and dip angles are studied.The results show that the relationship between the flying particle and the deformation particle and the depth and dip angle are power functions.But the number of power terms of the former increases with the increase of the angle and is always greater than 1; the latter also increases with the increase of the angle but is but less than 1.In constant depth,the growth of the above two numbers has a linear relationship with the angle,and with the increase of the depth,the slope and the intercept.