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

DOI：

 作者 单位 E-mail 崔铁军 辽宁工程技术大学 ctj.159@163.com 李莎莎 辽宁工程技术大学

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?、40?；煤岩层埋深深度设置为8种，分别为：-120m~-820m，间隔100m。对上述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，但前者随倾角增加a增加且均大于1；后者随倾角增加a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b和c均增加。

In order to study the process of stress rock burst of coal (rock) by mining, considering the different impact of depth and dip angle, the process is simulated with PFC. The condition of angle between coal and rock is set to 7 types, respectively: 0? 5? 10? 15? 20? 30? 40? The coal strata depth is set to 8 kinds, respectively: - 120m to -820 m, 100 m apart. The stress rock burst of coal (rock) processes are simulated in the above 56 kinds of condition. The number of the flying particle and the deformation particle are counted when calculating to balance. The relationship between the two numbers and the depth and dip angle are studied. The results showed that the relationship between the flying particle and the deformation particle and the depth and dip angle are power function. But the former with the increase of angle is increases and always greater than 1; the latter with the increase of angle is increases but less than 1. In constant depth, the growth of the above two numbers have the linear relationship with angle, and with the increase of the depth, the b and c are increased.
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