Longwall Mining Roof Supports

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 mining roof supports.

Permanent supports are only needed in the first workings portion and during installation and recovery operations. Longwall mining equipment selection b face supports. Longwall mining is a form of underground coal mining where a long wall of coal is mined in a single slice typically 0 6 1 0 m 2 ft 0 in 3 ft 3 in thick. Other roof supports longwall chocks or shields on modern longwalls are moved and relocated with the face equipment.

Roof supports for special applications. The benefits of longwall mining compared to other methods of pillar extraction are. 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. In any underground mining activity the in situ vertical and horizontal stresses that exist in the.

Roof support technology for longwall tailgates has changed dramatically during the past decade. Joy powered roof supports for high capacity longwall applications are custom designed to meet your exacting cycle and operating requirements. Our longwall top coal caving ltcc roof supports allow mining of seams up to 10 m 32 8 ft. Ratings up to 1 750 tonnes widths of 1 5 1 75 and 2 05 meters.

While it is frequently argued correctly that all items on a longwall face have to be considered as parts of an integrated unit and be fully compatible it cannot be denied that poorly designed and inadequate roof supports are likely to have a greater effect on results than other items and. 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.