As the face progresses the immediate roof above.
Longwall roof support.
Adapted to the mining challenges faced by our customers today cat customized systems for longwall mining include hydraulic roof supports high horsepower shearers automated plow systems and armored face conveyors with intelligent drive technology controlled and supported by advanced longwall automation.
Major falls in longwall gateroads have become more and more uncommon as pillar design practices have improved largely through empirical design practices such as that.
A mining method in which very long rectangular blocks of coal are defined during the development stage of the mine and then extracted in a single continuous operation by an automated cutting head moving parallel to the coal face when the coal is cut the working area is protected by a movable powered roof support system.
Longwall roof support design is no exception and mostly continues to be a product of this philosophy.
Our longwall top coal caving ltcc roof supports allow mining of seams up to 10 m 32 8 ft.
This type of longwall is in service for example at a mine in the hunter valley australia.
Caterpillar has extensive experience in the design of roof supports for specific mining conditions.
Nepean longwall and bmj have supplied fully tested roof supports to cook colliery appin west mine and oaky north mine over the past few years and nepean is currently in the process of completing a roof support test program for anglo s moranbah north s mine in queensland.
Ratings up to 1 750 tonnes widths of 1 5 1 75 and 2 05 meters.
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.
Our powered roof supports come with the latest longwall automation systems and can be operated either locally remotely or semi automated.
In seams with a longitudinal inclination of over 12 degrees the support collaborates with a conveyor stabilization a roof shield correction and dip lower section protection equipment.
Joy powered roof supports for high capacity longwall applications are custom designed to meet your exacting cycle and operating requirements.
This test program is the most extensive that has ever been.
Cat longwall top coal caving ltcc roof supports allow m.
