背斜对煤矿灾害的控制作用研究
Effect of Anticline on Control of Coal Mine Disaster
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摘要: 为了准确掌握豫西“三软煤层”背斜构造对矿井灾害的影响，为矿井灾害防治提供依据，基于瓦斯地质理论，通过数据统计、构造应力分析和层次分析法，结合现场实际揭露的地质资料，对义安背斜对矿井灾害的控制作用进行了研究。结果表明：义安背斜属于纵弯褶皱，弯流作用使轴部煤层变厚，且两翼及拐点裂隙较发育，富水性较强，使轴部瓦斯含量异常升高，两翼较低；义安背斜区域内煤层受到强烈的挤压作用并形成构造煤，在煤体结构异常区域易发生煤与瓦斯突出事故；背斜构造对煤体结构和煤质产生影响，其几何形态有利于热量的聚集，易发生煤层自燃事故。Abstract: In order to accurately understand the influence of the anticline of “three soft coal seam” in western Henan Province on the mine disaster, to provide the basis for mine disaster prevention, this research is based on the theory of gas geology, through data statistics, structural stress analysis and AHP method, combining with the actual revealed geological data, the control effect of mine disaster in Yi’an anticline is analyzed. The results show that the Yi’an anticline belongs to the longitudinal fold, and bend flow makes the shaft coal thicken, the fissures of the two wings and inflection point is developed, and the water rich is strong, so that the gas content in the shaft is abnormally increased, and the two wings are low; the coal seam in Yi’an anticline area is subjected to intense compression and forms structural coal, and coal and gas outburst accidents are easy to occur in the abnormal area of coal structure; the anticline structure has influence on coal structure and coal quality. Its geometry is favorable for heat accumulation and spontaneous combustion of coal seam.
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