FIELD: mining.
SUBSTANCE: invention is related to the field of mining, namely to method for degassing of coal beds. Cluster of vertical and slanted wells is drilled for coal bed. They are cased with casing pipes to roof of coal bed. Well shafts opened in interval of coal bed are filled with explosive. Blast impact at coal bed is carried out by means of explosive blasting. At the same time distance R between open shafts of neighbouring wells in interval of coal bed is determined from the following ratio: R=(0.8-1.2)(RT1+RT2) or R=(1.8 -2.1) RT. RT1, RT2 - radiuses of fissuring zone produced by blast, accordingly, in the first and in the second well. RT is radius of fissuring zone produced after blasting of single charge with equal capacities of charges in neighbouring wells.
EFFECT: improved efficiency of degassing due to development of vast fissuring zone in the whole volume of coal bed.
2 dwg, 1 ex
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