Abstract: Apparatuses and methods for a trailer that hangs when not in use and on which material may be transported. The apparatuses include a trailer having a single wheel bracket attached to at least one wheel and a trailer body. The trailer body has a first end and a second end and is attached to the single wheel bracket near the first end. The trailer body has a first coupler at the first end and a second coupler at the second end, the first coupler to attach the trailer to a second trailer and the second coupler to attach the trailer to a third trailer such that the trailer hangs by only the single wheel bracket from the first rolling surface of the beam-type rail when the trailer is not attached to the third trailer.

Abstract: Apparatuses and methods for a trailer that hangs when not in use and on which material may be transported. The apparatuses include a trailer having a single wheel bracket attached to at least one wheel and a trailer body. The trailer body has a first end and a second end and is attached to the single wheel bracket near the first end. The trailer body has a first coupler at the first end and a second coupler at the second end, the first coupler to attach the trailer to a second trailer and the second coupler to attach the trailer to a third trailer such that the trailer hangs by only the single wheel bracket from the first rolling surface of the beam-type rail when the trailer is not attached to the third trailer.

Abstract: System, apparatuses, and methods for supporting a trailer on a rail. The systems, apparatuses, and methods include a trailer for a rail. The trailer includes a first wheel to be supported by a first horizontal rolling surface of the rail, a wheel bracket attached to the first wheel by a first axle, and a trailer body attached to the wheel bracket, the trailer body having a hitch at a first end and having a coupler to receive the hitch of a second trailer at a second end.

Abstract: System, apparatuses, and methods for supporting a trailer on a rail. The systems, apparatuses, and methods include a trailer for a rail. The trailer includes a first wheel to be supported by a first horizontal rolling surface of the rail, a wheel bracket attached to the first wheel by a first axle, and a trailer body attached to the wheel bracket, the trailer body having a hitch at a first end and having a coupler to receive the hitch of a second trailer at a second end.

Abstract: A pedestal support for a mine prop. The pedestal support includes a collar to dispose a mine prop at least partially therein and a yielding member extending from the collar. The yielding member includes a wall having a top edge and a bottom edge and having a thickness that tapers from the top edge to the bottom edge and that flares from the top edge to the bottom edge.

Abstract: A pedestal support for a mine prop. The pedestal support includes a collar to dispose a mine prop at least partially therein and a yielding member extending from the collar. The yielding member includes a wall having a top edge and a bottom edge and having a thickness that tapers from the top edge to the bottom edge and that flares from the top edge to the bottom edge.

Abstract: An over/under monorail system for longwall mining operations can have a single overhead rail mounted trolley system with a pair of over/under mounted trolleys. Upper trolleys can be carried by the overhead rail, and can typically carry hydraulic pipes. A lower rail can be carried by the upper trolleys, and lower trolleys can be carried by the lower rail. The lower trolleys can typically carry electric cables. Some trolleys can be adapted to carry both flexible hydraulic hoses and electric cables, and such trolleys can be carried by either the upper or lower rails, depending upon the design of the overall system.

Abstract: An over/under monorail system for longwall mining operations can have a single overhead rail mounted trolley system with a pair of over/under mounted trolleys. Upper trolleys can be carried by the overhead rail, and can typically carry hydraulic pipes. A lower rail can be carried by the upper trolleys, and lower trolleys can be carried by the lower rail. The lower trolleys can typically carry electric cables. Some trolleys can be adapted to carry both flexible hydraulic hoses and electric cables, and such trolleys can be carried by either the upper or lower rails, depending upon the design of the overall system.