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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 6,005.95

Price: R 5,404.95

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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
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Normal Price | R 7,615.95
Price | R 6,854.95 | on special |

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Fifteen Dogs

AndrÃ© Alexis
Paperback / softback
176 pages
was: R 315.95
now: R 283.95
Available from overseas. Dispatched in aprox 4-8 weeks as local supplier is out of stock

A pack of dogs are granted the power of human thought - but what will it do to them? A surprising and insightful look at the beauty and perils of consciousness.

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The Ballerina and the Bull: Anarchist Utopias in the Age of Finance

Johanna Isaacson
Paperback / softback
288 pages
was: R 321.95
now: R 289.95
This title will take longer to obtain, and should be delivered in 6-8 weeks

Our moment has seen the resurgence of an anarchist sensibility, from the uprisings in Seattle in 1999 to the Occupy movement of 2011.

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The Memory Collectors: A Novel

Dete Meserve
Paperback / softback
320 pages

Enquiries only

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