A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effect of Longwall Mining on Surface Subsidence of Highways and Bridges
Longwall mining is the most economical method for mining coal since it extracts a large percentage of the coal at a high extraction rate. Removing a high percentage of the coal results in surface subsidence with large horizontal strains. These effects are immediately noticeable and can cause damage to highways, bridges, and retaining walls. For the study subsidence profiles over three longwall panels which were mined beneath state highways in Southeastern Ohio were measured. The average maximum subsidence was 3.5 ft. The average maximum compressive strain recorded was 0.008 in./in. Three predictive methods for the determination of displacements and strains were compared: (1) National Coal Board graphical method; (2) the profile method with empirical constants determined for Southeastern Ohio; and (3) a finite element program. Excellent subsidence agreement was found with the profile method, and reasonable strain agreement was determined with the finite element model.
Effect of Longwall Mining on Surface Subsidence of Highways and Bridges
Longwall mining is the most economical method for mining coal since it extracts a large percentage of the coal at a high extraction rate. Removing a high percentage of the coal results in surface subsidence with large horizontal strains. These effects are immediately noticeable and can cause damage to highways, bridges, and retaining walls. For the study subsidence profiles over three longwall panels which were mined beneath state highways in Southeastern Ohio were measured. The average maximum subsidence was 3.5 ft. The average maximum compressive strain recorded was 0.008 in./in. Three predictive methods for the determination of displacements and strains were compared: (1) National Coal Board graphical method; (2) the profile method with empirical constants determined for Southeastern Ohio; and (3) a finite element program. Excellent subsidence agreement was found with the profile method, and reasonable strain agreement was determined with the finite element model.
Effect of Longwall Mining on Surface Subsidence of Highways and Bridges
G. A. Hazen (author) / S. M. Sargand (author)
1985
154 pages
Report
No indication
English
Mineral Industries , Highway Engineering , Caving mining , Coal mining , Highways , Bridges , Damage , Measurement , Profiles , Displacement , Strains , Ohio , Surface subsidence
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