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抽出率是衡量抽放瓦斯效果的一个指标。抽出的瓦斯,仅是开采层瓦斯储量或邻近层瓦斯涌出量的一部分,其余的还需要用通风方法来解决。因此,要求不断改进抽放技术,加强抽放管理,扩大抽放范围,提高抽出率,减少不必要的供风量。提高抽出率的关键是提高开采煤层的预抽效果。抽放瓦斯效率高低直接影响着矿井安全生产的正常进行,同时对降低抽放瓦斯成本都有积极的意义。 六矿位于鹤壁煤田南部,含煤地层为二迭纪山西统,可采煤层一层,矿井设计能力75万吨/年,矿井绝对瓦斯涌出量为27.9米~3/分,相对瓦斯涌出量为18.96米~3/吨。
The withdrawal rate is a measure of the effect of draining gas. The extracted gas is only part of the methane emission in the formation or gas emission in the adjacent layer. The rest needs to be ventilated. Therefore, it is required to continuously improve drainage technology, enhance drainage management, expand drainage area, increase extraction rate and reduce unnecessary wind supply. The key to improve the extraction rate is to improve the pre-pumping effect of the coal seam. The efficiency of gas drainage directly affects the normal operation of mine safety production, meanwhile it has a positive meaning to reduce the cost of gas drainage. Located in the southern part of Hebi coalfield, the Sixth Coal Mine is a Permian Shanxi Province with coal-bearing strata. The coal seam can be reclaimed for one floor. The design capacity of the mine is 750,000 tons / year. The absolute gas emission of the mine is 27.9m3 / The amount of 18.96 m ~ 3 / ton.