【摘要】 为了获取掘进巷道前方煤体地震波速度和瓦斯参数间的对应关系,以阳泉五矿为实施矿井.采用矿井地震波速度超前探测方法对掘进煤巷进行探测,通过初至波拾取获得地震波原始记录中纵、横波速,并与巷道前方30m范围内平均瓦斯参数作相关分析.分析结果表明:一定条件下,煤体瓦斯含量越高,其地震波纵、横波速度越低.运用曲线拟合对纵、横波视速度与瓦斯绝对涌出量和瓦斯浓度进行拟合发现:纵、横波视速度与瓦斯绝对涌出量间存在ΔP=-4.6415Vp-2.7048Vs+16.1353的负线性关系;纵、横波视速度与瓦斯浓度间存在η=-0.9302Vp-0.5704Vs+3.3132的负线性关系,并对线性拟合结果进行验证表明:在误差允许范围内,计算值与实测值基本吻合.最后计算得到适用于太原组15#煤层及变质程度更高煤层的视速度瓦斯预警指标:Vp=2.00m/ms和Vs=0.73m/ms.更多还原

【Abstract】 In order to find the relationships between apprarent seismic wave speeds and gas parameters in the drilling coal roadway.The fifth mine of YangQuan is chosen to be the testing mine.Mine Seismic Speed Detection Method is used for advanced detection.The apparent speeds of P-wave and S-wave are gained by picking up first break in the original seismic records.The average gas parameters of the 30 meters range in front of the drilling roadway are calculated.Then the correlation analysis of apparent speeds and average gas parameters are done.The results indicate that the higher the average gas parameters are the slower the apparent speeds would be under certain conditions.The curve fitting is used to finding the linear relationship between them.And the curve fitting results show that there is a negative formula(ΔP=-4.6415Vp-2.7048Vs+16.1353) between apparent speeds of P-wave and S-wave and absolute amount of gas emission.There is a similar formula(η=-0.9302Vp-0.5704Vs+3.3132) between apparent speeds of P-wave and S-wave and gas concentration.Then the above two formulas are verified to be with the accepted error range.Finally the apparent speeds gas early warning indicators which can be used in TaiYuan 15# and the higher metamorphism coal mine are calculated and the numbers are Vp=2.00 m/ms and Vs=0.73m/ms.The research results can be expected to provide a new idea and way that should be used to predict the risk of the coal and gas bursting.更多还原