Deformations of coal seam and gas emission in preparatory workings
Abstract
At development of coal seams possessing high gas content, intensive gas emission is the most frequent and important obstacle in achievement of high indicators of labor productivity. Particular difficulties arise in connection with the transition of mining operations to deep horizons and the development of thick coal seams even at shallow depths - about 200-300 meters. The latter is characteristic for Kuzbass, where, according to G.D. Lidin, methanobicity is high. Lidin, the methane content of preparatory works reaches 50-60% of the total gas balance of mines. If we take into account that the level of methane content of mines in Kuzbass is less than in Donbass, it is easy to imagine the difficulties that will be encountered in mining operations in this basin in the near future. Some idea about the value of gas emission into the preparatory mine workings can be obtained from the data of the table. Already at a depth of 200-300 m, it becomes extremely difficult to combat the increased gas emission by liquefying methane to the established norm (not ≥ 1%).
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