METHOD FOR ISOLATION OF EMERGENCY AREA OF UNDERGROUND WORKING Russian patent published in 2012 - IPC E21F17/103 

FIELD: mining.

SUBSTANCE: method includes well drilling between the surface and roof of isolated underground working, construction of isolating barrier in the isolated underground working in case of emergency situation via pumping of hardening material into the working. Note that the cavity is created in the roof of isolated underground working before the emergency situation. Well drilling is done in geometrical centre of the cavity and supply of hardening material is done till complete cavity filling. Cavity size in direction perpendicular to the working longitudinal axis is taken equal to the width of isolated underground working, and height - equal to the product of half of isolated underground working width by tangent of hardening material spreading angle. Cavity size by the length of isolated underground working is defined by the proportion: l_c≤2h_c ctgφ, where l_c - cavity size by the length of isolated underground working, m; h_c - cavity height in the roof of isolated underground working, m; φ - angle of hardening material spreading, degree.

EFFECT: increase of reliability of emergency area isolation at underground fires.

2 dwg