构造煤超声波参数影响因素的分析

一定厚度构造煤的存在是瓦斯突出发生的必要条件;同时,构造煤发育区域也往往是瓦斯富集区。因此,研究构造煤的物性参数具有重要意义。采用灰色关联度和多元回归分析相结合的方法对构造煤的超声波实验测试参数的影响因素进行半定量研究。研究结果表明:影响构造煤纵波波速和品质因子的主要因素是煤体的孔隙率、水分、灰分和挥发分。纵波波速和品质因子随着孔隙率和挥发分的增加而增加,随着水分和灰分的增加而减少,视密度和最大镜质组反射率对两者影响较小。最后,从微观角度定性分析了孔隙率、水分和灰分三个主要影响因素对构造煤超声波参数的影响机理,为超声波探测构造煤技术提供了一定的理论支持。

Analysis on influence factors of ultrasonic parameters for tectonic coal

The existing of tectonic coal with certain thickness is the essential condition of coal and gas outburst;meanwhile,the development region of tectonic coal is also the gas enrichment area. Therefore,the study on physi-cal parameters of tectonic coal has important significance. The method of combining Multiple Regressive Analysis with Grey Relational Grade was applied in the semi-quantitative study on the influence factors of ultrasonic experi-mental parameters for tectonic coal. The results showed that the porosity rate,ash content,moisture content and volatile matter are the main factors affecting the longitudinal wave velocity and quality factor of tectonic coal. The longitudinal wave velocity and quality factor increasewith the increased porosity rate and volatile matter,and de-crease with the increased moisture content and ash content. The maximum vitrinite reflectance and visual density has less influence to the longitudinal wave velocity and quality factor. Finally,the influence mechanism of the po-rosity rate,ash content and moisture content on the ultrasonic parameters of tectonic coal was qualitatively analyzed from microcosmic angle,which provides theoretical support for the detection technology of tectonic coal by ultrasonic.