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用煤层瓦斯含量预测矿井瓦斯涌出量,生产矿井与设计矿井的预测方法不尽相同。生产矿井多是求出已采地区煤层瓦斯含量和实际瓦斯涌出量的相互换算关系,根据近期内生产地区的安排和其所在地区的煤层瓦斯含量,先求出预测区中各采掘工作面瓦斯量,然后再“由分散到集中”地预测矿井相对瓦斯涌出量。设计矿井瓦斯涌出量的预测,在时间上要求比较长,地区范围广,采掘地点的具体位置也难以预先肯定,它不像生产矿井考虑的那么细,常是以生产水平(或采区)为空间单元,大范围地考虑问题,取其预测区间的平均值。当然,设计矿井也应以煤层瓦斯含量为基础,参考同预测矿井地质条件、采煤方法相似的生产矿井的实际瓦斯涌出量与煤层瓦斯含量之换算关系来预测其瓦斯涌出量。
Prediction of gas emission from coal mines using gas content in coal mines is not the same as predicting the production and design of mines. The production of coal mines is to find out the coal mining area has been mining the actual gas emission and the gas content of the mutual conversion relationship, according to the recent production arrangements within the region and the coal seam gas content in the region to find the forecast area of the mining face gas And then “disperse to concentrate” to predict the relative gas emission from the mine. It is difficult to predict the specific location of mining sites. It is not as small as the production of mines, and is often based on the production level (or mining area) As a spatial unit, consider the problem in a wide range and take the average value of its forecast range. Of course, the design of the mine should also be based on the gas content of the coal seam, and predict the gas emission according to the conversion relationship between the actual gas emission and the gas content in the coal mine that is similar to the predicted geological conditions and mining methods.