Mine gallery roof protective grid applicator device - travels with coal cutting machine and traps grid under roof supports

摘要

The coal cutting machine (12) operating in the space between the coal face and a mine support device with a floor member and roof members and a vertical support between them. This prevents debris from falling into the gallery, carries a device (14) from which a wire grid (15) is unwound and applied to the roof (6). This grid can be trapped between the roof and the roof supports. The grid may be in the form of expanded metal, and is applied by a pressure roller (17) mounted on a swinging arm (18) with a hinge (20) at the bottom, on the machine. The roller can be held by the force of a spring (22) at the bottom of the arm, and the grid can be applied as the machine (12) travels along. A paper or other sheet material layer can also be applied above the grid by another dispensing device.