鄂尔多斯盆地低变质煤的煤层气抽采潜力-以彬长大佛寺矿为例

鄂尔多斯盆地低变质煤的煤层气资源量丰富,部分地区的煤层气勘探已显示出较大潜力。彬长矿区大佛寺矿属于高瓦斯矿井,矿井瓦斯涌出量高达155.49m3/min。大佛寺矿主要为低变质的长焰煤,煤层发育,目标煤层稳定,厚度大、埋藏浅,气含量相对较高,煤层气资源量丰富,地面煤层气抽采潜力大;主要目标煤层透气性系数高,属于可以抽采煤层,井下采煤工作面瓦斯抽采率超过73.2%,地面煤层气抽采气井产气量达到工业气流,均显示出较好的抽采潜力。

CBM Drainage Potential of Lowly Metamorphosed Coal in Ordos Basin-Using Dafuosi Mine in Binchang As An Example

CBM resources of low-rank metamorphosed coal in Ordos basin is abundant,and exploration of CBM in part of the basin has shown great potential.Dafuosi mine in Binchang mining area is highly gaseous mine,the maximum emission of coal mine gas reaching 155.49m3/min.Coal in Dafuosi mine is mainly low-rank metamorphosed long-flame coal.Coal seams are well-developed.The target coal seams are regular,with great thickness,shallow burial depth,and relatively high gas content.The CBM resources are abundant,and the potential for surface extraction is high. The permeability factor of the major target seams is high.These seams are extractable.The gas drainage rate of underground coal face exceeds 73.2%.The gas production from surface well reaches commercial gas flow,indicating good drainage potential.