Abstract: A feeder box for dumping bulk materials onto a conveyor of a mobile transfer station comprises at least one feeder device located adjacent a side of the conveyor, each feeder device including a box compartment and a support structure for the box compartment, the box compartment being pivotable with respect to the support structure so as to tilt towards the conveyor to dump bulk materials onto the conveyor.

Abstract: A rock bolt stabilizer device which can be arranged in boreholes for stabilizing rock and similar host environments in mining and tunneling. The device is adapted to perform the function of a rigid profile anchor under predetermined stress conditions, and is also adapted to perform the function of an expansion anchor under given stress conditions. The device generally comprises an anchor member with mix end which can be secured near the base of the respective borehole by means of a cementitious composition. For tensioning, the other end of the anchor member can carry a bearing plate, a spacer, and a fastener for tensioning. The device also includes a sleeve which performs the function of a rigid anchor, and the sleeve substantially surrounds the anchor member. An increased armoring and anchoring efficiency is achieved with the device.

Abstract: A roof support for coal-mining apparatus or other tunnel-excavating equipment has a shield plate with several rearwardly diverging and deepening longitudinal grooves in its upper surface. The grooves are designed to carry off detritus as the support advances and are spaced closely enough to form ribs therebetween adapted to crush larger chunks of overburden landing thereon.