煤层具有冲击倾向性是煤层发生冲击地压的必要条件,煤的冲击倾向研究是冲击地压机理研究的组成部分,是冲击地压预测预报的前提。本文首次提出以每个试验值为元素,统计落在每个冲击倾向等级内的频度,然后从煤的动态破坏时间、弹性能量指数和冲击能量指数三个不同侧面综合评判煤的冲击倾向方法,较好地解决了煤试样数量少,试验结果离散度较大所带来的问题,提高了评判结果的精确性和可靠性,具有实用意义。 Seam propensity is the necessary condition for rockburst to occur, and the study of coal impact propensity is an integral part of the research on rock burst mechanism, which is the precondition of rock burst prediction. This paper presents for the first time that each experimental value is taken as an element and the frequency of falling within each impact propensity grade is calculated. Then the impact tendency of coal is comprehensively evaluated from three different aspects: dynamic destructive time of coal, elastic energy index and impact energy index Method, which solves the problems brought by the small number of coal samples and the large dispersion of test results, and improves the accuracy and reliability of the judgment results, which is of practical significance.