136197 ⎘
Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face comprising a goaf shield articulated to a base member and supported by two or more rows of struts parallel to the working face
Mining rock deflector apparatus and method
#2Mining rock deflector apparatus and method
#3Longwall mining roof supports
#4Longwall mining roof supports
#5Method for automatically producing a defined face opening in plow operations in coal mining
#6Method for automatically creating a defined face opening in longwall mining operations