丰城矿务局河西矿区现有四对生产矿井，原设计能力117万t人，核定能力139万t人，实际能力早已突破200万t／a；另有建设中的曲江井和正在勘探的石上井田。矿井开采二叠系上统乐平煤系，缓倾斜单一中厚煤层，是江南主要的炼焦煤和动力煤炭的生产基地。一、矿井瓦斯情况坪湖、建新 Fengcheng Mining Bureau Hexi mine existing four pairs of production mines, the original design capacity of 1.17 million t people, the approved capacity of 1.39 million t people, the actual capacity has already exceeded 2 million t / a; and the construction of the Qujiang wells are being explored The stone on the field. Mining Permian Upper Leping coal system, gently inclined single medium-thick seam, is the main coking coal and coal production base in southern Jiangsu. First, mine gas Ping Lake, build a new