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Improved Stopping, Door, and Overcast Construction for Oil Shale Mines.

Adam ME; Brechtel CE; Agapito JFT
NTIS: PB 87-174918 :186 pages
This report describes the construction and testing of large (30-ft- high by 55-ft-wide) stopping and overcast structures in an oil shale mine. The work was undertaken to develop construction techniques and cost data and to measure leakage rates on full-scale structures in an oil shale mine. A design data base was developed by reviewing industry practice, oil shale industry plans, and technical literature. Alternate layouts for room-and-pillar mining were examined to find ways to reduce the size and number of ventilation control structures. Six full-size stoppings and one overcast structure were built at the colony pilot mine. Leakage rates were measured using both sf6 tracer gas techniques and the "brattice window" method. The leakage was measured both before and after a full-scale face blast. Blast air pressure were measured across two of the stoppings. Cost and leakage data were used to evaluate the projected overall performance of various combinations of the stoppings in a two-panel oil shale mine.
Publication Date
Document Type
CP; Final Contract Report;
Fiscal Year
NTIS Accession No.
NTIS Price
Identifying No.
OFR 11-87
NIOSH Division
Source Name
NTIS: PB 87-174918
Performing Organization
J.f.t. Agapito & Assoc., Inc.
Page last reviewed: November 19, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division