深部煤层瓦斯赋存机制研究现状及展望

Research Status and Prospect of Gas Occurrence Mechanism in Deep Coal Seam

深部煤层瓦斯赋存机制是指导深部煤炭和瓦斯资源安全高效开采的重要理论基础。相比浅部煤层,深部煤层的赋存环境具有高地应力、高地温、高瓦斯压力、低渗透率的"三高一低"特征,其决定了深部瓦斯赋存独有特征以及深部资源产出面临的技术难题。系统回顾了应力、温度、压力、渗透率对深部煤层瓦斯赋存规律的影响,指出单一物理场影响研究存在的不足,明确了多场耦合作用环境是研究深部煤层瓦斯赋存机制的客观条件,为深部煤层瓦斯赋存机制研究指明了方向。

The gas occurrence mechanism of deep coal seam is an important theoretical basis to guide the safe and efficient mining of deep coal and gas resources.Compared with the shallow coal seam,the occurrence environment of the deep coal seam has the characteristics of high stress,high temperature,high gas pressure and low permeability,which determines the unique characteristics of the deep gas occurrence and the technical problems faced by the deep resource output.We systematically reviewed the influence of stress,temperature,pressure and permeability on the gas occurrence laws of deep coal seam,pointed out the shortcomings of single physical field influence research,and made clear that the multi-field coupling environment is the objective condition for the study of gas mechanism of deep coal seam,and pointed out the direction for the study of gas occurrence mechanism of deep coal seam.