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Surface Testing and Evaluation of the Multiple-unit Continuous Haulage System.

Jaspal JS; Erhard LA; Mayercheck WD
MISSING :60 pages
Most of the underground coal in the United States is mined via room- and-pillar mining methods with continuous miners. These machines operate intermittently because they have to wait for shuttle cars to interchange positions. To overcome this discontinuity in shuttle car haulage and to realize the full production potential of continuous miners, the U.S. Bureau of Mines developed a multiple- unit continuous haulage (much) system through a research contract with Jeffrey Mining Machinery Div. (JMMD). The much system consists of 12 rubber-tired viehicles and a bridge conveyor. The rubber- tired vehicles are connected by a unique mechanical linkage system to form a 250-ft train. The mechanical linkage permits the vehicles to track-retrack the preceding vehicle in both inby and outby directions. The cut coal cascades from one vehicle to another until it is discharged on the section conveyor belt. The much system provides continuous haulage to the continuous miner. The much system was initially surface tested by JMMD. Subsequent extensive testing was conducted by the Bureau at its test facilities at Bruceton, Pennsylvania. Deficiencies found during testing were corrected. This report summarizes initial tests by JMMD and subsequent extensive tests and evaluation by the Bureau.
Publication Date
Document Type
IH; Information Circular;
Fiscal Year
Identifying No.
IC 9228
NIOSH Division
Source Name
Page last reviewed: November 26, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division