阳泉新景矿3_下砂体厚度对3~#煤层瓦斯涌出量的控制作用

Control Function of Ⅲ_L Sand Body Thickness on No.3 Coal Seam Gas Emission in Xinjing Coalmine,Yangquan

通过对阳泉新景矿3#煤层顶板3下砂体厚度与冲刷带和小断层进行相关性研究,发现砂体剧烈变薄或缺失地区小断层发育,在大面积中厚砂体部位之上,断层发育部位基本围绕砂体厚度变化方向呈放射状分布;而冲刷带主要发育于厚砂体区及其附近区域;通过对已抽采的7个工作面和未抽采的8个工作面瓦斯涌出量统计显示,在冲刷带与小断层地带瓦斯涌出量异常高,分析认为3下砂体厚度对瓦斯涌出量起到明显控制作用。

Through con＇elation study between No.3 coal roof IIIL sand body thickness, scouring zone and minor fault, has found where sand body thinning abruptly or omission, minor fault is destined to be well developed. On the large area medium to thick sand body position, fault developing is basically surrounded sand body thickness change direction presented radial distribution. Scouring zone is mainly developed in thick sand body area and near by. Through statistics of 7 drained and 8 to be drained working faces gas emission have demonstrated that in scouring zone and minor fault developed area, gas emission is abnormally high, analysis considered that IIIL sand body thickness has obviously controlled gas emission.