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Engineering Methods for the Design and Employment of Wood Cribs.

PB94113552

Publication Date	1993
Personal Author	Barczak, T. M.; Gearhart, D. F.
Page Count	48
Abstract	Wood cribs are used extensively by the mining industry to stabilize mine openings. While the cost per crib is relatively low, the extensive use can result in annual mine costs of over 1 million dollars. In an effort to improve the utilization of these supports and to reduce ground control hazards, the U.S. Bureau of Mines has developed engineering methods to assist mine operators in wood crib design and employment. Design and employment criteria are established based on the strength, stiffness, and stability of the crib structure in relation to the load conditions imposed by the mine environment.
Keywords	Underground mining Cribs Timbering(Supporting) Design Underground supporting Coal mining
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 97A - Reserves
Corporate Authors	Bureau of Mines, Pittsburgh, PA. Pittsburgh Research Center.
Document Type	Technical Report
Title Note	Information circular/1993.
NTIS Issue Number	199403

Engineering Methods for the Design and Employment of Wood Cribs.

Engineering Methods for the Design and Employment of Wood Cribs.
PB94113552

Publication Date	1993
Personal Author	Barczak, T. M.; Gearhart, D. F.
Page Count	48
Abstract	Wood cribs are used extensively by the mining industry to stabilize mine openings. While the cost per crib is relatively low, the extensive use can result in annual mine costs of over 1 million dollars. In an effort to improve the utilization of these supports and to reduce ground control hazards, the U.S. Bureau of Mines has developed engineering methods to assist mine operators in wood crib design and employment. Design and employment criteria are established based on the strength, stiffness, and stability of the crib structure in relation to the load conditions imposed by the mine environment.
Keywords	Underground mining Cribs Timbering(Supporting) Design Underground supporting Coal mining
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 97A - Reserves
Corporate Authors	Bureau of Mines, Pittsburgh, PA. Pittsburgh Research Center.
Document Type	Technical Report
Title Note	Information circular/1993.
NTIS Issue Number	199403