河南复杂煤矿区瓦斯地面抽采技术研究

Research on Gas Surface Extraction Technology in Henan Complex Coal Mining Area

河南煤层具有低压、低渗、低饱和、高破坏的特性,通过在地面针对不同的煤层赋存条件采取有针对性的储层改造手段,形成一定的规模产气量,可以有效降低煤层瓦斯含量,改变应力分布,提高煤层的渗透率,降低瓦斯压力和瓦斯突出危险性。在河南省煤矿煤储层类型划分基础上,通过选择不同井型进行地面煤层气开发的先导性试验,为井下瓦斯治理提供一条新的技术途径,保障煤矿安全、高效的生产。

Henan coal seams have the characteristics of low pressure,low permeability,low saturation,and high destruction.By adopting targeted reservoir transformation measures for different coal seam conditions on the ground,a certain scale of gas production can be formed to effectively reduce coal bed gas.Content,change the stress distribution,increase the permeability of the coal seam,reduce the gas pressure and the risk of gas outburst.Based on the coal mine type division of coal mines in Henan Province,through the selection of different well types for the pilot test of surface coalbed methane development,it provides a new technical approach for underground gas control to ensure the safety and efficient production of coal mines.