我国煤层气抽采方法及在晋城矿区的应用

The Drainage Methods of Coal Bed Methane and Its Application in Jincheng Mine Fields

瓦斯是煤矿安全生产的最大威胁之一,同时也是人类生存环境的破坏者,因此,有效地进行采前预抽和利用已受到人们的重视。针对中国煤层气赋存的低压、低渗、低饱和等复杂地质特征,探讨了现有煤层气的开采方法及优缺点,包括:井下瓦斯抽放、地面垂直井抽采、煤与瓦斯共采和废弃矿井抽采等,并结合晋城矿区具体条件研究了各种抽采方法的适用性。研究结果可为中国煤层气的有效开采和利用提供参考。

Gas is one of the biggest threatens to safety production in coal mine and the destructor of humans＇ living environment, so the efficiency drainage before mining and using of CBM have been paid more attentions. In allusion to the complicated geological particularities of CBM occurrence in China such as：low reservoir pressure,poor permeability and low saturation and so on, the current drainage methods of CBM and its relative merits are discussed in this paper, which includes gas drawing underground, surface vertical well suction, simultaneous extraction of gas and coal, and gas drainage from abandoned coal mine et al. Besides, the applicability of these methods is probed by integrating the specific condition of Jincheng coal mine area in China. The investigation results provide reference for efficiency drainage and using of CBM in China.