An Jia Ling Open-Pit Mine Goaf Fire Detection And Fire Prevention Technology

Small coal mine out-of-order and Cross-border mining result to a large number of coal left in goaf crushed and oxygenated before coal unintegratly of 2008, A large number of goaf is in a state of hyperthermy and spontaneous combustion which brings the exploiting, equipment, safe of pelope indanger.Fire in serious condition based on records AnJiaLing open-pit mine field workers opening pit has appeared in several open flame where can clearly see a lot of white smoke and fire point position, because of stope underground for old goaf and there is the possibility of coal spontaneous combustion so it brings to the stope blasting operation in great safety hidden trouble and cause premature explosion of explosiveeasily that endanger the safety of the workers. So this article uses the magnetic exploration method for detecting AnJiaLing open-pit mine goaf through the analysis of the detection data and processing to draw out the AnJiaLing magnetic measuring point distribution. And combined with the experience of field workers to determine the scope of the stope in fire area.In aiming at the different attributes for AnJiaLing open pit in the fire area divideing the stope in the fire area into exposed fire area and unexpose fire area and extinguishing measures was put forward according to the different properties of fire area. Has revealed the fire area within the stope by excavators and sprinkler fire-extinguishing directly unexpose the grouting process of fire area fire fighting within stope. The records of field workers and goaf borehole temperature detection indicate fire area temperature drop significantly after water flooding and grouting treatment and give cool fire a good seal.