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Using the point load test to determine the uniaxial compressive strength of coal measure rock.

Authors
Rusnak-J; Mark-C
Source
Proceedings of the 19th International Conference on Ground Control in Mining, August 8-10, 2000, Morgantown, West Virginia. Peng SS, Mark C, eds., Morgantown, WV: West Virginia University, 2000 Aug; :362-371
Link
NIOSHTIC No.
20021059
Abstract
Point load testing is used to determine rock strength indexes in geotechnical practice. The point load test apparatus and procedure enables economical testing of core or lump rock samples in either a field or laboratory setting. In order to estimate uniaxial compressive strength, index-to-strength conversion factors are used. These factors have been proposed by various researchers and are dependent upon rock type. This study involved the extensive load frame and point load testing of coal measure rocks in six states. More than 10,000 individual test results, from 908 distinct rock units, were used in the study. Rock lithologies were classified into general categories and conversion factors were determined for each category. This allows for intact rock strength data to be made available through point load testing for numerical geotechnical analysis and empirical rock mass classification systems such as the Coal Mine Roof Rating (CMRR).
Keywords
Coal-miners; Coal-mining; Coal-processing; Coal-workers; Mine-workers; Miners; Mining-industry; Rock-mechanics; Statistical-analysis
Publication Date
20000808
Document Type
Conference/Symposia Proceedings
Editors
Peng-SS; Mark-C
Fiscal Year
2000
NTIS Accession No.
NTIS Price
ISBN No.
0939084569
NIOSH Division
PRL
Source Name
Proceedings of the 19th International Conference on Ground Control in Mining, August 8-10, 2000, Morgantown, West Virginia
State
WV; PA
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