Automatic face transfer linear cutting rotary head continuous mi

Automatic removal of storage bin build-up

Barrel for rock breaking tool and method of use

Bench mining method and apparatus

Blasting positioning device

Blower and dust collecting machine and method of operation

Bore hole mining

Borehole aerostatic ground support system

Borehole extraction of minerals

Borehole mining method

Borehole mining process for recovery for petroleum from unconsol

Borehole mining tool

Borehole mining valve actuation

Bunker for surface mines and method of forming a storage area fo

Canopy and shield structure for supporting a shield in a seam-li

Carpet take-up device and method for using the same

Cartridge for generating high-pressure gases in a drill hole

Cavity induced stimulation method of coal degasification wells

Cavity mining minerals from subsurface deposit

Chimney demolition device and method