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| 01922cam 2200289za 4500 |
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| 001 | 9.865038 |
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| 003 | CaOODSP |
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| 005 | 20221107161713 |
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| 007 | cr ||||||||||| |
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| 008 | 181121s1977 onc #ot f|0| 0 eng d |
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| 020 | |z0660009846 |
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| 040 | |aCaOODSP|beng |
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| 041 | |aeng|bfre |
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| 043 | |an-cn--- |
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| 086 | 1 |aM38-13/76-27E-PDF|zM38-13/76-27 |
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| 100 | 1 |aSeegmiller, Ben L. |
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| 245 | 12|aA case history of support at Nacimiento mine |h[electronic resource] / |cby Ben L. Seegmiller. |
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| 260 | |a[Ottawa] : |bEnergy, Mines and Resources Canada, |cc1977. |
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| 300 | |ax, 52 p. : |bfigures. |
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| 490 | 1 |aCANMET report ; |v76-27E |
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| 504 | |aIncludes bibliographic references. |
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| 520 | |a"The Nacimiento copper mine has experienced stability problems that threatened to prevent further mining. The nature of the rock material and the type of slides that occurred indicated that it should be possible to stabilize the slope by means of rock anchors, and in 1974 a major support installation was begun. Several hundred rock anchors with capacities up to 200 tons were subsequently installed. These were effective in stabilizing the slope initially, but shortly after, a number of anchors failed through stress corrosion. Although precautions were taken to prevent further anchor failures, those which remained were inadequate to bear the entire burden and a substantial slide did occur. The case history does show that a slope was effectively stabilized by rock anchors, and that when the supporting force was reduced by corrosion the slope again became unstable"--Abstract, p. iii. |
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| 546 | |aIncludes abstract in French. |
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| 692 | 07|2gccst|aMining technology |
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| 710 | 1 |aCanada. |bEnergy, Mines and Resources Canada. |
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| 830 | #0|aCANMET report ;|v76-27E.|w(CaOODSP)9.852792 |
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| 856 | 40|qPDF|s2.96 MB|uhttps://publications.gc.ca/collections/collection_2018/rncan-nrcan/m38-13/M38-13-76-27-eng.pdf |
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