彬长矿区下沟煤矿瓦斯地质规律研究

彬长矿区下沟煤矿开采侏罗系延安组4号煤层,地层倾角较陡,一般在0～18°。依据构造形态及地层倾角变化,将井田内构造分为二部分,南部为倾斜带,北部为平缓起伏带。4煤层为矿井范围内唯一可采煤层,平均厚度16.25 m,煤层对瓦斯赋存起到一定的控制作用,整体的分布规律受井田内单斜控制,在单斜区域瓦斯含量较高,在河岸单斜下盘瓦斯含量较小,单斜及矿井西北部区域为瓦斯绝对涌出量大于15m3/min区、单斜下盘区域为小于5 m3/min区。瓦斯总资源量442.59×104m3,可开发量98.07×104m3,开发前景较好,但目前抽采的瓦斯未得到利用,建议有关部门统筹考虑彬长矿区的瓦斯利用问题。

Binchang Mining Geology under the Rule of Coal Mine Methane

Jurassic Yanan 4 seam was mining by Binchang Mining area Xiagou Coal Mine.It is very steep,generally 0～ 18°.According to the structural form and the change of dip angle,the field is divided into two parts,the southern slope zone,the north with gentle ups and downs.4 coal seam is the only coal mine layer,average thickness 16.25 m.The coal seam has some control to gas deposit,the whole distribution rule was controled by well.The gas was higher at monocline area and lower at river monocline.northwest of monoclinic and the absolute gas emission region is greater than 15 m3/min area,single oblique footwall area is less than 5 m3/min area.The total gas resources is 442.59×104 m3,which can developed 98.07 × 104 m3,has a better development prospects,but the gas extraction has not been used,suggest the department concerned and consider the use of gas Binchang mining issues.