By analyzing the geological characteristics, function of coalgathering, coal measures strata and burial conditions of Jiyuan area, it is pointed out the prospecting direction for coal field.
通过对济源西部地质特征、煤田聚煤作用、煤系地层及埋藏条件的分析，提出了在该区的找煤方向。
2
Several gathering modes and boosting modes of coal-bed methane are analyzed and com- pared. Their applicable conditions are summarized, and an engineering case is given.