摘要
针对长平煤矿3号煤层断层两盘瓦斯分布情况不清、断层对瓦斯赋存影响机制不明问题,采用现场实测断层两盘瓦斯含量、瓦斯放散初速度、煤层坚固性系数等数据,研究了长平煤矿3号煤层断层发育特征对瓦斯赋存规律的影响,并对断层两盘煤与瓦斯异常涌出危险性进行划分。研究结果显示,断层两盘瓦斯含量有较大差异,断层下盘瓦斯含量明显大于上盘;随着距断层距离增大,瓦斯含量具有先减小后逐渐增大的特点,近断层面区域瓦斯含量小于正常值;断层上盘煤的坚固性系数普遍略小于下盘,距断层面越近,煤的坚固性系数越小;断层上盘远离断层面煤层透气性系数呈先增大后减小的趋势。确定了距断层面15~25 m区域为瓦斯异常涌出区域,并提出了防突措施。
In response to the unclear distribution of gas on the two sides of the fault in the No.3 coal seam of Changping Coal Mine,and the unclear impact mechanism of the fault on gas occurrence,data such as on-site measured gas content,initial gas release velocity,and coal seam solidity coefficient were used to study the impact of fault development characteristics on gas occurrence patterns in the No.3 coal seam of Changping Coal Mine.The danger of abnormal coal and gas emission from the two sides of the fault was divided.The research results show that there is a significant difference in gas content between the two walls of the fault,and the gas content in the lower wall of the fault is significantly higher than that in the upper wall.As the distance from the fault increases,the gas content first decreases and then gradually increases,and the gas content in the area near the fault plane is lower than the normal value.The solidity coefficient of coal on the hanging wall of a fault is generally slightly smaller than that on the lower wall,and the closer it is to the fault plane,the smaller the solidity coefficient of coal.The permeability coefficient of coal seams far from the fault plane on the hanging wall of the fault shows a trend of first increasing and then decreasing.The area of 15~25 m from the fault plane has been determined as the area of abnormal gas emission,and anti outburst measures have been proposed.
作者
栗海滔
Li Haitao(Shanxi Changping Coal Industry Co.,Ltd.,Jincheng 048000,China)
出处
《能源与环保》
2023年第7期15-20,共6页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
关键词
地质构造
断层
瓦斯赋存
影响机制
geological formations
faults
gas occurrence
influence mechanism
