Abstract
The goal of this paper is the significance of the tensile strength as one of parameters determining the resistance of rocks to blasting has been emphasized within the field of blasting research. In the paper the applicability and interpretation of tensile strength tests in connection with rock characterization for blasting is discussed.
Brazilian tests, uniaxial tensile strength tests and point load tests have been performed on rock material drilled out from the vicinity of blasting operation prior to and after blasting. Both the Brazilian tests and the uniaxial tensile strength tests revealed no general decrease of the remaining rock material strength due to the blasting. RQD and fracture frequency calculations indicated a law degree of remaining rock damage in a part of the rock mass close to the blasts. The absence of damage and problems encountered at the blasting may, on the basis of the results from the tensile strength tests, is explained as a result of the state of fissuring of the rock material. On the basis of the results is suggested that more research should be aimed at the use of Brazilian and uniaxial tensile strength tests as methods for characterizing the rock strength for fragmentation.
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References
ASTM. Standard test method for direct tensile strength of intact rock core specimens. ANSI/ASTM D 2936-78 (1978)
Bergh-Christensen, J., Selmer Olsen, R.: On the resistance to blasting in tunneling. In: Proceedings of 2nd Congress ISRM, vol. 3, pp. 5–7, Belgrade (1970)
Broch, E., Franklin, J.A.: The point-load strength test. Int. J. Rock Mech. Min. Sci. 9, 669–697 (1972)
Colback, P.S.B.: Analysis of brittle fracture initiation and propagation in the Brazilian test. In: Proceedings of 1st Congress ISRM, pp. 385–391, Lisbon (1966)
Field, J.E., Ladegaard Pedersen, A.: The importance of the reflected shock wave in rock blasting. Swedish Detonic Research Foundation, Stockholm, Report DL, vol. 7 (1969)
Goodman, R.: Methods of Geological Engineering. West Publishing Co., St. Paul (1976)
Hawkes, I., Mellor, M.: Uniaxial testing in rock mechanics laboratories. Eng. Geol. 4, 177–285 (1970)
Hino, K.: Theory and Practice of Blasting. Nippon Kayaku Co Ltd. (1959)
Holmberg, R., Mäki, K.: Case examples of blasting damage and its influence on slope stability. In: Proceedings of 3rd International Conference on Stability in Surface Mining, SME of AIME, Vancouver, pp. 773–793 (1982)
Holmberg, R., Persson, P.A.: Design of tunnel perimeter blasthole patterns to prevent rock damage. In: Proceedings of Tunne1ing 1979, Institute of Mining and Metallurgy, London (1979)
Holmberg, R., Rustan, A., Naarttijarvi, T., Mäki, K.: Crater blasting of a raise in the LKAB-Malmberget Mine. Swedish Detonic Research Foundation, Stockholm, Report DS 1980:12 (in Swedish) (1980)
Hondros, G.: The evaluation of Poisson’s ratio and the modulus of materials of a low tensile resistance by the brazilian (Indirect Tensile) test with particular reference to concrete. Australian J. Appl. Sci. 10, 243–268 (1959)
ISRM Commission on standardization of laboratory and field tests. Suggested methods for determining tensile strength of rock materials. Int. J. Rock Mech. Min. Sci. Geornech. Abstr. 15, 99–101 (1978)
Mellor, M., Hawkes, I.: Measurement of tensile strength by diametral compression of discs and annuli. Eng. Geol. 5, 173–225 (1971)
Mäki, K.: On the influence of fissures on rock fragmentation at blasting. Swedish Detonic Research Foundation, Stockholm, Report 1981:2 (in Swedish) (1983)
Mäki, K., Holmberg, R.: Rock damage from crater blasting of a raise. Swedish Detonie Research Foundation, Stockholm, Report 1980:8 (in Swedish) (1980)
Persson, P.A., Lundborg, N., Johansson, C.H.: The basic mechanisms in rock blasting. In: Proceedings of 2nd Congress ISRM, vol. 3, pp. 5–3, Belgrade (1970)
Tourenq, C., Denis, A.: La resistance a la traction des roches. laboratoire Central des Ponts et Chaussées, Rapport de Recherches 4 A, Paris (1970)
Wijk, G.: Extentricity in the uniaxial strength test on rock. Swedish Detonic Research Foundation. Stockholm, Report DS 1979:13 (1979a)
Wijk, G.: Some new aspects of the Brazilian test. Swedish Detonic Research Foundation, Stockholm, Report DS 1979:5 (1979b)
Acknowledgement
This research work was carried out at Annaba University, Algeria, under the sponsorship of the Mineral Processing and Environmental Research Laboratory, Whose financial and technical assistance is gratefully acknowledged.
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Rached, H.A., Talhi, K., Hannachi, E.B. (2018). Strength Properties of Rock as an Index of Blastability. In: Hoyos, L., McCartney, J. (eds) Advances in Characterization and Analysis of Expansive Soils and Rocks. GeoMEast 2017. Sustainable Civil Infrastructures. Springer, Cham. https://doi.org/10.1007/978-3-319-61931-6_13
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DOI: https://doi.org/10.1007/978-3-319-61931-6_13
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