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The caving and sliding control of surrounding rocks on large coal roadways affected by abutment pressure
Cable truss system Numerical simulation Coal roadway Abutment pressure
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2012/3/28
For the caving and sliding control of roadways with large cross-section, thick mudstone roof and abutment pressure influence, the cable truss system is proposed and its support mechanism is thoroughly...
Implementing Value Pricing for U.S. Roadways
Value Pricing U.S. Roadways
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2009/9/28
This paper reviews the current status of congestion-based road pricing in the United States and examines some of the characteristics of successful and unsuccessful projects, including their marketing ...