METHOD TO MINE MINERAL BEDS Russian patent published in 2013 - IPC E21C41/18 

FIELD: mining.

SUBSTANCE: method to mine mineral beds includes separation of a mined area of a mine field into mineral columns, preparation of columns by means of arrangement of area developing entries, working of columns with longwall faces equipped with mechanised complexes and dismantling of mechanised complexes in dismantling chambers after completion of actual mining in the longwall faces. If a distance between the longwall face and the location of the dismantling chamber is more than the width of the zone of high stresses that arise in front of the longwall face bottom, at the border of the mined column in front of the longwall face bottom they drive an auxiliary dismantling mine. The bed is loosened in the area that adjoins the auxiliary dismantling mine at the side of the longwall face, by means of drilling of wells in the bed. Actual mining in the longwall face is continued until the auxiliary dismantling mine is stripped with its bottomhole. At the same time the width of the zone of loosened bed in the area that adjoins the auxiliary dismantling mine at the side of the longwall face is determined from the following expression.

EFFECT: reduced costs related to dismantling of a mechanised complex, reduction of time to perform dismantling works and their increased safety.

2 dwg