1 The number of main chutes should not be less than two in the mines with complex engineering geology, hydrogeological conditions or annual circulation of more than 1000 kt .
    2 The main chute should be vertical, the single-segment vertical height should not be greater than 200m , the branch inclined chute should be more than 60° ; the chute diameter should not be less than 5 times the ore maximum block , but not less than 3m ;
    3 The main chute loading chamber shall be provided with a special safety passage;
    4 The main chute should be equipped with special ventilation and dustproof facilities, and the dirty air should be introduced into the return air passage;
    5 The ore with high mud content, large cohesiveness or high sulfur content and easy to oxidize and self-ignite should not be used.
    2 The main chute should be vertical, the single-segment vertical height should not be greater than 200m , the branch inclined chute should be more than 60° ; the chute diameter should not be less than 5 times the ore maximum block , but not less than 3m ;
    3 The main chute loading chamber shall be provided with a special safety passage;
    4 The main chute should be equipped with special ventilation and dustproof facilities, and the dirty air should be introduced into the return air passage;
    5 The ore with high mud content, large cohesiveness or high sulfur content and easy to oxidize and self-ignite should not be used.
Secondary Air Pump
By adding fresh air to the exhaust from the engine, the oxygen content in the exhaust is increased, so that the unburned HC (hydrocarbon) and CO (carbon monoxide) in the high-temperature exhaust can be burned and oxidized again, thereby reducing exhaust pollutants the goal of.
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