Article

UndergroundEstimating Volume of Shotcrete for Mining Applications

David F. Wood

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Traditionally, there has been a rather ad hoc attitude to­wards technical supervision of mining engineering ground control programs, to the extent that the preparation and enforcement of specifications has not been a major issue. In certain locations, however, the dominant use of con­tracting companies to

Article

UndergroundStructuralShotcrete Reinforcement

Dr. Rusty Morgan

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Before the 1970s, shotcrete was reinforced either with conventional reinforcing steel welded wire mesh fabric, or in some in­stances with chain-link mesh or even chicken mesh. In the early 1970s the con-Dr. D.R. (Rusty) cept of steel fiber reinforced shotcrete

Article

RepairUndergroundRehabilitation of Sanitary and Storm Sewers Using Shotcrete

W.L Snow

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The infrastructure of the United States is crumbling above, below, and around us. A considerable segment of the public and private engineering community is currently engaged in solving a geo­metrically increasing problem with geometrically decreasing funds. The problem is often compounded since maintenance of public

Article

UndergroundDry, Pre-mixed Shotcrete Supply for Tunnels and Mines

Hugo Armelin, Neil Duke, Jorge Montegu, Luis Contreras

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Tunneling and mining projects use shotcrete primarily as a means of ground support. Immediate application of shotcrete provides stability of the working face, prevent­ing loose rock from initiating movement and thus permit­ting incremental advances of underground openings even in the worst ground conditions (type V