The crack propagation resistance of rock, which depends significantly on the specimen size, was determined by analyzing results of the hydraulic fracturing experiments using the 10 m sized granite specimen at a quarry in Fukushima Prefecture, Japan. The method of analysis was the modified BEM, where the crack was assumed to be expanding as a semi-elliptical crack such that the stress intensity factor was approximately constant along its periphery. It was found that the fracture toughness of the granite being independent of crack size is 1. 93 MPa multiplied by (times) m parallel .
|Title of host publication||Unknown Host Publication Title|
|Editors||Surendra P. Shah, Stuart E. Swartz|
|Publisher||Soc for Experimental Mechanics Inc|
|Number of pages||8|
|Publication status||Published - 1987|
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