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Keywords: maintainance
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Proceedings Papers

Paper presented at the ISRM International Symposium, September 21–24, 1981
Paper Number: ISRM-IS-1981-143
.... Therefore, the maintainance of cross cut and haulage level roadway has been encountered with many difficulties concerning with design of support, cost and frequency of repair work in roadways. In this paper, the author reviews some features of mechanical properties of rock formation and some technical...

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