( A ) the main reasons:

    ① the use of non-flame retardant conveyor belt, or unqualified retardant conveyor belt .

    ② hold the belt conveyor overload , or severe deviation as well as conveyor rollers do not turn other reasons, so belt slippage , the belt drive roller prolonged friction and heat , causing a fire.

    ③ roller does not turn or rotation is not flexible , high temperature , ignition debris or fail conveyor .

    ④ hydraulic coupling the use of substandard fusible plug and flammable media may cause a fire.

    ⑤ high-speed rotating machinery parts or belt for a long time with coal , waste rock , wood, cables, pipes and other friction , causing a fire.

    ( 2 ) preventive measures:

    ① the use of qualified retardant conveyor belt .

    ② strengthen Maintenance of belt conveyors to prevent belt slippage and timely treatment .

    ③ promptly replace the faulty roller .

    ④ hydraulic coupling must be used to meet the requirements .

    ⑤ To set fire pumps, a water valve located every 50m and equipped with fire hoses and adequate fire fighting equipment .

    ⑥ strictly enforce the " rules" of the relevant provisions of the various protection devices installed .