Australian supplier of kamat pumps high pressure cleaners longwall valves water jetting pressure cleaning and dust suppression equipment.
Longwall hydraulic roof supports.
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 to that extent are more important.
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.
Ratings up to 1 750 tonnes.
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.
Caterpillar is the world leader in longwall roof support technology.
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.
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.
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.
Since its foundation in 1992 longwall hydraulics pty limited has successfully provided many services to australian coal mines and other industries.
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.
Equipment selection b face supports.
Heights from 0 8 to 7 8 meters.
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.
Our optimally harmonized electro hydraulic control systems achieve minimum cycle times for roof supports and ensure perfect support for the mining machine.
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.
