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Theory and Method of Automatically Formed Roadway in Underground Mining

By (author) Qi Wang, By (author) Bei Jiang, By (author) Zhenhua Jiang

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normal price: R 5 778.95

Price: R 5 489.95

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This book investigates in detail the theory and method of automatically formed mining roadway (AFR). The AFR method utilizes mining pressure and broken expansion characteristics of the collapsed rock mass in the gob to automatically form roadways, which changes the traditional â€œlong cantilever beamâ€ to â€œshort cantilever beamâ€ structure, and eliminate roadway excavation and coal pillar reserve. Key technologies are developed under the guidance of the â€œequilibrium miningâ€ theory, such as in situ drilling and zoning technology, roof directional presplitting technology, high prestressed constant-resistance support technology, and gangue blocking support technology. The mining technologies and methods are successfully applied to a large number of coal mines of different geological conditions. The book is intended for both researchers and practitioners working in the mining, civil, and geological engineering fields.

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Normally shipped | Usually dispatched in 3 to 4 weeks as supplier is out of stock
Readership Age |

Normal Price | R 7 420.95
Price | R 7 049.95 | on special |

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Helgoland: The Strange and Beautiful Story of Quantum Physics

Carlo Rovelli
Paperback / softback
208 pages
was: R 295.95
now: R 265.95
Available from overseas. Usually dispatched in 3 to 6 weeks

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The Coming Wave: AI, Power and Our Future

Mustafa Suleyman
Paperback / softback
352 pages
was: R 295.95
now: R 265.95
Stock is usually dispatched in 6-12 days from date of order

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The Order of Time

Carlo Rovelli
Paperback / softback
224 pages
was: R 295.95
now: R 265.95
Available from overseas. Usually dispatched in 3 to 6 weeks

Originally published in Italian: L'ordine del tempo (Milan: Adelphi Edizioni, 2017).

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