In the geological survey report for the new mine, all data related to coal seam dust explosion identification must be thoroughly documented and available. For every new level or depth of operation, a coal dust explosion test must be conducted to ensure safety. The mine is required to establish an efficient and reliable dust suppression water supply system. Any mining area without a proper dust-proof water supply line is not allowed to operate.
All main transportation tunnels, conveyor belts, inclined and horizontal lanes, uphills, downhills, transport roads, return airways, excavation tunnels, coal bunkers, coal chutes, coal discharge points, and loading areas must be equipped with dust suppression water pipes, branch lines, and valves. The water used for dust control should be filtered to maintain quality. However, this requirement does not apply to water-based mining methods or areas where water is already used in the process. All coal bunkers and chutes must maintain a layer of coal on top to prevent emptying. If there is a risk of water inflow, these areas may be vented, but once opened, the bunker gates must be closed, and diversion pipes installed. Coal chutes should never be used as ventilation openings.
Mines operating in areas with high coal dust concentrations or explosive coal seams must implement specific measures to prevent and isolate potential explosions. This includes separating the two wings of the mine, adjacent mining sections, nearby coal seams, and connected roadways using water barriers or rock dust barriers. It is crucial to regularly remove floating coal from the tunnels, clean or wash deposited coal dust, and distribute rock dust periodically. Major roadways should be swept regularly to minimize the risk of dust accumulation.
Each year, mines are required to develop comprehensive dust control strategies, including prevention and isolation measures, along with management systems, and ensure their implementation. Additionally, mines must conduct at least one weekly inspection to verify that the location, quantity, water or rock dust levels, and installation quality of explosion protection facilities meet the required standards.
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