Roof Supports Mining

Surface control niosh mining publications have documented the advantages of using roof screen or mesh to prevent ground fall injuries.

Roof supports mining.

The can is a yieldable secondary roof support made from a confined core of cementitious composite encased in a cylindrical steel canister which resembles a can. Our longwall top coal caving ltcc roof supports allow mining of seams up to 10 m 32 8 ft. The can handles mine floor heaving and roof sag better than any other type of support available today. Including timber steel and concrete options.

Intrinsic roof support an empirically based software package analysis of roof bolt systems arbs has been developed to assist in design of roof bolt systems in coal mines. The order from the roof support manufacturer zmj zhengzhou coal mining machinery group co ltd has a value of approximately 2 7 million and in addition to the main hydraulic control system once again includes all safety relevant auxiliary valves. High strength steels automated welding for increased weld integrity elimination of stress prone transverse welds. Strata worldwide was founded on its line of engineered secondary roof supports for underground coal mining.

Originally introduced in 1993 the strata propsetter support system remains one of strata s top selling support props through out the world. Following a conventional cut with a shearer to about 3 m 9 8 ft the roof supports move forward and allow the caving coal to fall via controllable caving shields onto a second conveyor mounted gob side.