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顿巴斯的一些矿井开采煤层深度已超过1000米,随着开采深度的增加,矿井地质条件变坏,特别是由于从煤层和围岩中泄出的甲烷增多,使井巷中瓦斯含量增高。下表所列顿涅茨克——马凯耶夫矿区煤层瓦斯抽放结果就是一例。顿巴斯最深的生产矿井位于该地区。由依靠通风和瓦斯抽放,从矿井中排出大量的沼气,按照矿区沼气赋存的特点,可把矿区的煤层划分为如下几个类型:高瓦斯压力煤层;小量积聚及大量积聚的可燃瓦斯煤层;含复杂成份的混合瓦斯煤层等。例如,最近发现在矿井可燃瓦斯中,除甲烷外,还有大量的乙烷、丙烷、丁烷及其它同系物,包括液态碳氢化合物。
In some of Donbass, the depth of coal seams is over 1000 meters. As the mining depth increases, the geological conditions of the mines deteriorate, especially due to the increase of methane released from coal seams and surrounding rocks, resulting in an increase of gas content in the boreholes. An example is the gas drainage from the coal seams in the Donetsk-Makeyev mine, as shown in the table below. The deepest production mine in Donbas is located in the area. By relying on ventilation and gas drainage, a large amount of methane is discharged from the mine. According to the characteristics of biogas deposits in the mine, the coal seams in the mining area can be classified into the following types: high gas pressure coal seam; small accumulation and large accumulation of combustible gas Coal seam; Mixed gas containing complex components such as coal seam. For example, it has recently been found that in mine combustible gas, in addition to methane, there is a significant amount of ethane, propane, butane and other homologues, including liquid hydrocarbons.