By E. Hoek, E.T. Brown
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Sample text
These g uidelines are too detailed t o justify inclusion in this discussion but, briefly, Stauffe r sug g ests that contouring should not be attempted on pol e populations of less than 100 and that, for very weak preferred orientations, as many as 1000 poles may be require d to give e reliable result . A full discussion of Stauffer' s recommendations is given in Rock Slope Engineerina 2 . Computer processing of structural dat a Consulting org anisations and individuals involved in th e processing of large volumes of structural geology date hav e turned to the computer as an aid .
Computer programs fo fabric diagrams . American Journal„of Science, Vol . 265 , 1967, pages 166-172 . H . Computer methods for plotting beta diagrams . American. Journal of Science, Vol . 267, 1969, pages 11141117 . 64. P . Stability of discontin uous rock masses under polyaxial stress systems . Froc . Cording, ed . , ASCE, New York, 1972, pages 665-683 . 65. J . Analysis of fracture orientations fo r input to structural models of discontinuous rock . S . 7669 , 1972 . 66. D . Sources of error in joint surveys .
7 NO C wo 1e '- r _ ,e/ /_ E / L LIB >\WE! DED TUFFGcy-green 12, cnys Gre,k parate to pin,i, 7ine IM s* 11111 *III e ysta//ine, p. assive. •/r j * i Figure 21 . , fault _arerr*ed . dias-TO° s F-. h 111 shorrered min fault u -- * L-3 fainfly ; lowbande O li é '. +i ION DRILL NO TxsE eOYLES oR1uER S M a. 1GYa5 Eo. ° l °-.. r 1 1 1 during the drilling operation, as shown in the photograp h opposite, but it cannot be considered adequate for permanent core storage . The storage racks illustrated in figur e 21 are a good example of the type of core storage which i s considered necessary on a major project .