By A. Roberts
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Extra info for Applied Geotechnology. A Text for Students and Engineers on Rock Excavation and Related Topics
Rock Mech. Min. , 6 , 277 (1969). 26. LIVINGSTON, C . , Fundamentals of rock failure, Colo. Sch. Mines Q. 5 1 (3) 1-11 (1956). 27. HUGHES, B. C , Nuclear Construction Engineering Technology, N C G Technical Rep. N o . 2 Lawrence Radiation Laboratory, 1968. 28. CHERRY, J. , Computer calculations of explosion-generated craters, Int. J. Rock Mech. Min. Sei. 4 , 1 - 2 2 4 (1967). 29. DAW, A . , and DAW, Z . , The Principles of Rock Blasting, E. & F. N . Spon, London, 1909. 30. CLARK, L . D . , and SALUGA, S .
Comparative Studies of Explosives in Salt, US Bur. Min. Rep. Invest. N o . 6041, 1962. 34. ATCHISON, T. C , and PUGLIESE, J. , Comparative Studies of Explosives in Granite, US Bur. , Rep. Invest. N o . 6434, 1964. 35. ATCHISON, T. C , and PUGLIESE, J. , Comparative Studies of Explosives in Limestone, U S Bur. , Rep. Invest. N o . 6395, 1964. 36. , COATES, D . , Coupling and stress waves in close proximity to surface explosions, Int. J. Rock Mech. Min. Sei. 4 , 2 2 9 - 4 3 (1967). 37. NOREN, C H .
By using shortdelay blasting the preliminary drilling may be completed over a wide area in advance of the excavation (Fig. 9). Pre-splitting and Smoothwall Blasting Conventional tunnel blasting has certain disadvantages. , the excavation of an area of cross-section larger than that which is desired. This is due to the inability of explosives, when used as described, to give precise control over the finished dimensions of the blast. The structural design of the finished tunnel sets the maximum limits on dimensions, but to ensure that these are achieved must inevitably involve some damage to the rock walls beyond those limits.