【摘要】 煤层瓦斯含量分布特征是煤矿瓦斯灾害防治的技术基础。分析了研究区域内断层对煤与瓦斯分布的控制作用,并采用Anderson断层模式对断层2盘瓦斯积聚的规律进行了力学分析讨论,揭示了研究区域内的瓦斯地质规律,认为在锅底山断层的推挤作用下,艾山断层表现为封闭性,上下2盘煤体剪切破坏严重,破坏带内煤层透气性急剧下降,瓦斯逸散困难,断层2盘附近煤层瓦斯含量较高,造成瓦斯富集,并表现出煤层瓦斯含量随距断层由近及远呈递减并趋稳定之态。选取平煤十一矿己16-17煤层己二采区东翼为应用区域,建立了埋深和距断层距离等因素与含量的定量关系,预测了未采区煤层瓦斯含量的分布,并在生产中对预测值与实测值进行对比,相对误差在5%以下,验证了利用瓦斯地质规律法预测煤层瓦斯含量的可靠性。更多还原

【Abstract】 The prevention and control technology of gas disaster in coal mine is based on the distribution characteristics of the coal seam gas content. In this paper,it analyzed the control effect of the fault for the coal and gas distribution in the study area,and discussed the law of gas accumulation in the two fault walls from the mechanical analysis point by the fault mode of Anderson,which revealed the law of gas geology in the study area. It was thought that Aishan fault presented as sealing property under the subduction of Guodishan fault,and the coal in the two walls of which sheared and damaged seriously. Coal seam permeability decreased sharply in the failure zone,so it was difficult for the gas to dissipate. The coal seam gas content nearby the two walls of fault was relatively high,which enriched the gas. It presented that the coal seam gas content declined and tended to be stable condition from the near to the far at a distance from the fault. It selected the east wing of Ji’er mining block of JI16- 17 Coal Seam in No. 11 Mine of Pingdingshan Coal Mine as the application area,established the quantitative relation of the burying depth and the distance from the fault with the gas content,and predicted the distribution of coal seam gas content in the unmining areas. Then it contrasted predictive values with measured values in the production,the relative error was under 5%,which verified the reliability of this method.更多还原