METHOD OF VENTILATING BLIND MINE WORKING Russian patent published in 2001 - IPC

FIELD: mining industry, particularly, ventilation of blind mine workings and tunnels. SUBSTANCE: method includes hole drilling from preliminarily driven working with fresh air moving along to ventilated blind working; installation of local ventilating fan in preliminarily driven through working; connection with local ventilation fan of stand of flexible ventilation pipes; laying of this stand through hole to blind working and supply through stand of fresh air. Hole after its drilling is reamed to cross-section not less than sum of cross-section areas of pipes of ventilation stand and minimal cross-section area of ventilation workings according to adopted safety regulation. EFFECT: excluded drilling of holes from surface for laying flexible pipeline and their insulation after use for prevention of air leakage. 1 dwg