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Evaluation and durability testing of a staged combustion rock ripper - 2 volume set. Phase 2 - evaluation of the application of repetitive fuel/air explosions to rock ripping.
Spokane, WA: U.S. Department of the Interior, Bureau of Mines, H0252056, 1977 Apr; :1-96
A tractor-integrated version of an explosive ripping system was developed for mining application. This system uses diesel fuel and a tractor-mounted blower supplying 30 psig compressed air to a two- stage combustion chamber to produce a high-pressure (600 psia) gas charge. The charge is rapidly released into the rock formation near the tip of the ripper. The system, mounted on a d9 tractor, was tested at several quarry and mining operations to investigate rock fracturing effectiveness. Although the results of comparative ripping passes conclusively demonstrated that the system increases rock fracture, performance of the system is strongly dependent on rock morphology and properties as well as basic performance of the tractor-ripper. The theory of conventional and explosive ripping modes is described, and existing correlations of seismic velocity and ripper performance are shown to be in error.
CP; Final Contract Report
NTIS Accession No.
OFR 15(2)-78; Contract-H0252056
Evaluation and durability testing of a staged combustion rock ripper - 2 volume set. Phase 2 - evaluation of the application of repetitive fuel/air explosions to rock ripping
Southwest Research Institute
Page last reviewed: May 5, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division