METHOD TO MANAGE HARD-TO-COLLAPSE ROOF WHEN MINING GAS-BEARING BEDS IN LONG FACES WITH MECHANICAL COMPLEXES Russian patent published in 2013 - IPC E21C41/18 

FIELD: mining.

SUBSTANCE: method to manage a hard-to-collapse roof includes drilling of long and short inclined wells from preparatory mines into roof rocks, their charging and explosion with the help of explosives beyond a reinforcement line in a mined space. During each explosion of charges a support is arranged in long wells for a board of hard-to-collapse layers separated from the massif from rocks that fall out of the blasting cone along the entire length of the mining face. When exploding charges in short wells, supports are arranged near mine sections, and using established supports, free collapse of the main roof board portion that breaks off the massif during explosion is prevented, as well as pushing out of gas accumulated in the mined space into the bottomhole space of the long face.

EFFECT: increased safety of gas bearing beds mining.

3 dwg