Flexible roof drill for low coal.
Finney-JL; Eakin-RN; Rich-DE; Wall-TJ
Spokane, WA: U.S. Department of the Interior, Bureau of Mines, Contract H0242063, 1979 Jul; :1-272
The IRRI Flexible Roof Drill for low coal, referred to as the Rod Changer Drill, evolved as a result of the Phase I and II efforts on this contract in which several design concepts were evaluated. The Low Coal Drill program was initiated to provide a roof drill which, in conjunction with the Bendix Roof Bolt Inserter, would be capable of operating in coal seams as low as 30 inches. This drill would have the ability to drill and install bolts of up to eight feet in length, thus retaining productivity and increasing operator safety by removing the operator from the immediate area. The IRRI Rod Changer Drill performs the drilling of longer than seam height roof drills by automatically coupling up to 6 short drill steel sections to form the drill string. This concept will permit the operator to perform drilling from a remote location, although bolt insertion requires his presence in the immediate area. The underground test evaluation was conducted at Bethlehem Nicholas Mine No. 81 located in Drennen, West Virginia. The field trial was completed in two and one-half months in which the vehicle performed adequately in all areas. The test demonstrated the ability of the Rod Changer Drill to successfully function in an underground environment without major malfunctions. The test also revealed the necessity of further refinement of the drill to improve productivity and reliability.
Drilling equipment; Underground mining; Coal miners; Coal mining; Coal seams; Design; Experimental data; Installation; Mining equipment; Performance testing; Roof bolts; Safety; Thickness
CP; Final Contract Report
NTIS Accession No.
Spokane, WA: U.S. Department of the Interior, Bureau of Mines, Contract H0242063
Ingersoll-Rand Research, Inc.