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| 02511cam 2200433za 4500 |
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| 001 | 9.866897 |
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| 003 | CaOODSP |
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| 005 | 20221107162153 |
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| 006 | m o d f |
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| 007 | cr ||||||||||| |
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| 008 | 190110t19771978onca ob f000 0 eng d |
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| 020 | |z066010007X|q(print) |
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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 |aM38-13/78-11E-PDF|zM38-13/78-11 |
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| 100 | 1 |aHerget, G. |
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| 245 | 10|aEquipment and procedures to determine ground stresses in a single drill hole |h[electronic resource] / |cG. Herget, P. Miles and W. Zawadski. |
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| 260 | |aOttawa : |bCANMET, Energy, Mines and Resources Canada, |c1977, c1978. |
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| 300 | |aiv, 22 p. : |bill. |
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| 490 | 1 |aCANMET report ; |v78-11 |
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| 500 | |aCover title. |
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| 500 | |a"September 1977." |
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| 500 | |a"Minerals Research Program, Mining Research Laboratories." |
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| 500 | |aDigitized edition from print [produced by Natural Resources Canada]. |
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| 504 | |aIncludes bibliographical references (p. 16). |
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| 520 | |a"Determination of ground stress is necessary for applying strength testing and failure theories to the rational design of excavations in rock. The major expense item for ground stress determination is the drilling of holes to install equipment and for overcoring. The triaxial strain cell developed by CSIR in South Africa has the advantage that only one drill hole is necessary to determine the complete ground stress tensor. Initial experience showed, however, that the rate of success was lower using the triaxial equipment than when using the biaxial or doorstopper equipment which requires three drill holes to obtain the complete stress tensor. Experience from field tests has resulted in modifying the triaxial stress determination equipment and testing procedures. These are described for the benefit of potential users"--Introd., p. 1. |
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| 546 | |aIncludes summary in French. |
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| 693 | 4|aRock pressure--Measurement--Equipment and supplies |
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| 693 | 4|aDrilling and boring |
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| 693 | 4|aMining engineering |
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| 700 | 1 |aMiles, P. |
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| 700 | 1 |aZawadski, W. |
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| 710 | 1 |aCanada. |bEnergy, Mines and Resources Canada. |
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| 710 | 2 |aCanada Centre for Mineral and Energy Technology. |
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| 710 | 2 |aMinerals Research Program (Canada) |
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| 710 | 2 |aMining Research Laboratories (Canada) |
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| 830 | #0|aCANMET report ;|v78-11.|w(CaOODSP)9.852792 |
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| 856 | 40|qPDF|s2.16 MB|uhttps://publications.gc.ca/collections/collection_2019/rncan-nrcan/m38-13/M38-13-78-11-eng.pdf |
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