瑞利波预测煤与瓦斯突出

Using Reyleigh Wave to Predict Coal and Gas Outburst

瑞利波勘探是近年来发展起来的一种新型的岩土原位测试勘探方法。笔者重点对瞬态瑞利波相速度的算法进行了研究。提出了对信号进行预先调制 ,随后再对所求得的相位进行修正的方法 ;另为还须考虑其仪器采集信号时的时间差影响。根据以上算法求得的相速度更接近瑞利波真速度 ,从而提高了相速度的分辨率和精确度。把瞬态瑞利波勘探法运用在矿山生产中 ,利用平面瑞利波的频散特性 ,根据瑞利波的传播速度与煤岩的物理力学性质具有相关性 ,提出了一种新型的预测煤与瓦斯突出的方法。为矿井安全生产预测预报瓦斯突出提供了一种新的手段 。

Reyleigh wave prospecting is a newly developed method for reconnoitering the original rock's location. The algorithm for solving phase velocity of transient Reyleigh wave was emphatically studied. The signal modulation was adjusted first followed by amending the phase obtained. The influence of time difference in sampling with instruments should be considered. The value of phase velocity obtained by above mentioned algorithm would be closer to the true wave velocity, and the resolution and precision of the phase velocity would be improved. When the transient Reyleigh wave prospecting was applied in mining, taking advantage of the frequency dispersion character of Reyleigh wave and the correlation between transmission velocity of Reyleigh wave and physical mechanics property of coal rock, a new predicting technique of coal and gas outburst was developed. This new method could provide a new measure for predicting the coal and gas outburst and for analyzing the risk zone and safety distance.