INSTALLATION
Change Out 0 CommentInstallation of Pans from Chock #5 to Chock #70 Ensure that pans are placed in their correct order and install pans 63 to 12 and then from 64 to 68. Chock Installation The chocks are installed on the new face in the position that they occupied on the previous longwall. […]
Read MoreSYSTEMS
Ventilation 0 CommentThe type of ventilation system used in a longwall mine is dependant upon the conditions found at each mine. The most influencial factor in the choice of ventilation system is the amount of gas that is present in the mine atmosphere. If the mine is considerably gassy the gas in […]
Read MoreOVERVIEW
Ventilation 0 CommentVentilation of a longwall mine and the longwall face is one of the most important aspects of longwall mining.The main functions of ventilation in longwall mining is: Supply of fresh air at tolerable heat and humidity levels for the mine workers to breathe Removal of noxious gasses from the mine […]
Read MoreCOMMUNICATIONS
Equipment 0 CommentThe communication systems used in undergound mining generally consist of the following: Telephone Systems: The telelphone has become an integral part of mine communication and is mainly used to locate and inform key personnel. The telephones used in underground coal mines are intrisically safe due to the hazardous mine atmosphere. […]
Read MoreBEAM STAGE LOADER
Equipment 0 CommentWhen the coal is transported by the AFC along the longwall face it reaches the beam stage loader at the end of the face. The beam stage loader is simply a chain conveyor that transport coal from the AFC to the main belt conveyor. Also incorporated into the beam stage […]
Read MorePANTECHNICON
Equipment 0 CommentA pantechnicon is a train of sleds carrying the services to the longwall face. It is generally located on the maingate road, along the belt conveyor. It is usually pulled or dragged along the roadway in concert with the advance of the face. The dragging of the system is achieved […]
Read MoreCOAL PLOUGH
Equipment 0 CommentThe coal plough is no longer used in Australian coal mines but the first Australian longwall installation in 1963 used a coal plough in the Illawarra Coalfields. However, the coal plough is still used in Germany and other European coal producing countries but in diminishing numbers. In Germany the coal […]
Read More4 LEG SUPPORT
Powered Supports 0 CommentThis type of shield has two sets of legs inclined forward into the canopy and the other two inclined backwards and connected to the goaf shield. The main features of the 4 leg shield are: The front legs connect the base and the canopy and the rear legs connect the […]
Read MoreCHOCK SHIELD SUPPORTS
Powered Supports 0 CommentChock shields supports always have 4 hydraulic legs and all 4 legs are connected to the canopy of the support. The legs of a chock shield support are either vertical or inclined but the majority of chock shields have inclined legs as this provides better support pressure to the canopy. […]
Read MorePOWERED SUPPORTS
Powered Supports 0 CommentHydraulic powered roof supports are self advancing structures which are interconnected along the length of the longwall face. Each unit along the line is also connected to each pan of the AFC. The function of the powered supports are to: To control strata deformation, fracture and movement around the coal face, To […]
Read More