【摘要】 根据煤矿实际条件和震动波传播特点,建立了最优通道个数的确定原则,构建了用于定位精度评价模型中P波波速和P波到时标记精度的方差函数,符合两个参数随距离、纵波幅值阻尼系数和纵波波速变异系数增大而波动性增强的特点。现场数值试验结果表明:当震源激发探头个数足够多时,不断地增加定位通道个数并不能有效提高震源的定位精度,在台网布设较优时,6个通道就可以保证震源的定位精度;台网布设较差区域对误差的抵抗能力较弱,增加探头反而降低震源定位精度;提高震源定位精度,应首先从优化台网布设入手,然后再利用最优通道个数选取原则确定最优通道个数。更多还原

【Abstract】 Based on the practical conditions of coal mine and the characteristics of propagation of seismic wave,a principle was built to choose the optimal channel numbers,and for evaluation of location accuracy,two variance functions in the evaluation model were constructed to describe the increased fluctuations of P wave velocity and the marked first arrival time with the increase of distance between source and station,P wave amplitude damping coefficient and coefficient of variation of P wave velocity.The results of numerical calculations from situation show that:when a lot of channels receive the signals released by big tremor,it is not effective to improve the location accuracy by constantly adding channels,for good network configuration,six channels can keep the high location accuracy.The low robustness exist in bad network configuration lead to the decreasing of location accuracy by adding channels.In order to improve location accuracy,first the network should be optimized and then the optimal channel numbers can be got by the principle.更多还原