Underworkings should adopt incombustible materials supporting the position have?
Underground roadway where incombustible material support should be adopted? KEPIN below small make up for you to answer:
Underworkings should adopt incombustible materials supporting the main position all have the following:
(1) the shaft, tunnel, and the joint of each level.
(2) the bottom.
(3) the main hoist way with the main shipping lane, continuous return air lane.
(4) underground cavern mechanical and electrical equipment.
(5) before and after the main roadway in belt conveyor head on both ends of the 20 m range.
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