Longwall Mining Roof Supports

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.

Longwall mining roof supports.

Leg bore sizes ranging from 125 to 480 mm. Joy incorporates best in breed shearers roof supports face conveyors stageloaders crushers and mobile belt tail pieces to deliver a complete longwall system that is in a class of its own. The key to optimizing roof support design both primary and secondary relies on an understanding of the strata mechanics and the interaction of the support with the strata. The ultimate goal is to match.

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. Secondary support for longwall gateroads remains uncertain and often controversial. A cutting tool travels back and forth along the seam dropping ore onto conveyors that haul it away.

The near end roof. What makes these impressive coal production rates possible are the massive hydraulic roof supports that shoulder the roof until the shearer has completed its pass. Joy complete longwall systems represent the ultimate solution for high production longwall mining. In longwall mining powerful shearing machines drive back and forth across coalfaces of up to 400 metres 1300 feet in length producing coal at rates of up to one ton every second.

Joy powered roof supports for high capacity longwall applications are custom designed to meet your exacting cycle and operating requirements. Heights from 0 8 to 7 8 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. 2 1 longwall mining method a longwall panel is about 1000 to 2000 meters long with a typical width of around 150 200 meters and for a seam of thickness near about 3 4 meters.

Supporting longwall operations around the clock and around the world. A longwall mining system includes at least one face end roof support having a longitudinal length and at least one near end roof support adjacent the face end roof support. Roof supports for special applications. These mode of access are termed as gate roads and tail roads.

Longwall mining is a highly productive underground coal mining technique. Equipment type 8 items. This can be assumed as a very long and wide pillar with modes of access on either sides. A longwall mining system consists of multiple coal shearers and a series of self advancing hydraulic roof supports.