煤岩体冲击倾向性指标相关性研究

Study on the Indicator Correlation of Coal and Rock Burst Tendency

对煤岩材料进行单轴压缩实验,获得相应的冲击能量指数、弹性能量指数、动态破坏时间数据,分析了3个指标之间相关关系。研究结果表明:煤岩体的弹性能量指数与冲击能量指数之间满足正相关性,在两者数据值比较小的区间符合对数关系;动态破坏时间与冲击能量指数之间存在明显的负相关性,在动态破坏时间较小时,两指标符合乘幂关系;冲击倾向性实验中可根据拟合结果由其中某一指标值确定相关的另一指标。在其他区间内,数据的离散程度较大,相关性较差,实验中应当适当增加样本数量,提高结果的准确性。

The correlation relationship among impact energy index,elastic energy index and the dynamic damage time was analyzed by the data from coal samples tests under uniaxial compression.The research shows that impact energy index and elastic energy index were positive correlation and they accorded with the relationship of logarithm in the lower values,there was a significant negative correlation between the impact energy index and the dynamic damage time and they accorded with power relation when the dynamic damage time was low.In the experiment of the impact tendentious identification,when some index values at a specific interval,it should appropriately increase the number of samples to improve the accuracy of the results.In addition,if a particular index volatility is too large,while another associated indicator with a good stable,the index can be determined according to the fitting results.