Engineering Rock Mechanics
322 Design of surface excavations sliding, wedge sliding and direct toppling. The maximum slope angles are given in the followin ...
Questions and answers: design of surface excavations^323 excavation required for this slope is given by H2/2 tan $ per unit leng ...
324 Design of surface excavations The minimal volume of side slope excavation is required by the two facing slopes whose dip dir ...
Questions and answers: design of surface excavations 325 tion angle, but the volume requirements are also much more anisotropic. ...
326 Design of surface excavations For each of the azimuth values under consideration, we identdy the maximum slope angle that wi ...
Questions and answers: design of surface excavations 327 (b) Indicate, in general terms, the design changes required to overcome ...
328 Design of surfoce excavations These overlays are used in conjunction with a hemispherical projection plot of both the great ...
Questions and answers: design of surface excavations 329 extremes of this range where sliding on individual benches may occur. T ...
330 Design of surface excavations 418.8 A rock slope with a face angle of Sf is cut into a rock mass containing a single set of ...
Questions and answers: design of surface excavations^33 1 Standard normal randoms Random values 0.353 1.084 -0.232 0.60 51.8 63. ...
332 Design of surface excavations and N(0 < F < 1.5) = 19, giving Pr(0 < F < 1.0) = 7/32 = 0.22 and Pr(0 < F < ...
Questions and answers: design of surface excavations^333 'y a\,,..**'. ,/' ,,/' .-' zero, and will the stress state on the beddi ...
334 Design of surface excavations weight of the rock overlying the bedding plane and any water pressures induced due to the oper ...
Questions and answers: design of surface excavations 335 available friction angle x-coordinate, m -15 \lo -5 /$ 5 10 15 20 25 30 ...
336 Design of surfuce excavations In this diagram the force W represents the weight of the material which overlies the foundatio ...
Additional points 337 18.3 Additional points Foundations and rock slopes are generally at the Earth’s surface and hence will be ...
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Underground 79 excavation instability mechanisms 19.1 Underground instability In Chapters 17 and 18, we presented information re ...
340 Underground excavation instability mechanisms Figure 19.2 Measuring fracture surface roughness. surface, e.g. the element at ...
Underground instability 341 Figure 19.3 Tunnel boring machine. in surface blasting cannot be used so effectively underground bec ...
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