A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Coal-mine bumps; some aspects of occurrence, cause and control
Analysis of 117 occurrences of bumps shows that 67.6% are associated with pillar-line points; slabbing and splitting pillars, development, and other unfavorable mining practices in abutment areas may be contributory or primary cause; methods of preventing bumps or minimizing their effects.
Coal-mine bumps; some aspects of occurrence, cause and control
Analysis of 117 occurrences of bumps shows that 67.6% are associated with pillar-line points; slabbing and splitting pillars, development, and other unfavorable mining practices in abutment areas may be contributory or primary cause; methods of preventing bumps or minimizing their effects.
Coal-mine bumps; some aspects of occurrence, cause and control
U S Bur Mines -- Bul
Holland, C.T. (author) / Thomas, E. (author)
1954
37 pages
Report
English
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