Longwall Hydraulic Roof Supports

A number of hydraulic jacks called powered roof supports chocks or shields which are typically 1 75 m 5 ft 9 in wide and placed in a long line side by side for up to 400 m 1 300 ft in length in order to support the roof of the coalface.

Longwall hydraulic roof supports.

Caterpillar is the world leader in longwall roof support technology. Watch this 5 minute video for an explan. Nepean longwall offers structures and hydraulic cylinders manufactured by bmj of china a manufacturer with an outstanding track record of design competence and manufacturing quality. Underground longwall 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.

An individual chock can weigh 30 40 tonnes extend to a maximum cutting height of up to 6 m 20 ft and have yield rating of 1000 1250 tonnes each and hydraulically advance itself 1 m 3 ft 3 in at a time. In the early 1970s demanding mining conditions in german coal mines set the stage for extensive r d in roof support technology. Our optimally harmonized electro hydraulic control systems achieve minimum cycle times for roof supports and ensure perfect support for the mining machine. Leg bore sizes ranging from 125 to 480 mm.

Longwall roof support design is no exception and mostly continues to be a product of this philosophy. 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 to that extent are more important. Equipment selection b face supports. Since its foundation in 1992 longwall hydraulics pty limited has successfully provided many services to australian coal mines and other industries.

Ratings up to 1 750 tonnes. 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. Caterpillar manufactures the complete range of roof support controls from manual hydraulic controls to the advanced pmc r roof support control system for state of the art longwall automation monitoring and remote diagnosis. Australian supplier of kamat pumps high pressure cleaners longwall valves water jetting pressure cleaning and dust suppression equipment.

Joy powered roof supports for high capacity longwall applications are custom designed to meet your exacting cycle and operating requirements. When moving and setting a roof support the leg hydraulics have to perform numerous tasks simultaneously and quickly.