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http://dx.doi.org/10.9720/kseg.2019.4.405

Field Tests of Hydraulic Rock Splitting Technique Using Arrays of Injection Holes with Guide Slots  

Park, Jong Oh (Songam Engineering & Construction)
Woo, Ik (School of Architecture & Coastal Construction Engineering, Kunsan National University)
Publication Information
The Journal of Engineering Geology / v.29, no.4, 2019 , pp. 405-415 More about this Journal
Abstract
The cracks induced by hydraulic rock splitting technique are formed in the direction parallel to the free plane, which is perpendicular to the minimum principal stress of the ground, or is affected by the pre-existing microcracks. In this study, the hydraulic rock splitting experiments were conducted in which the guide slot was engraved in the direction parallel to the borehole axis on the biotite granite slope, and the hydraulic pressure was injected through the double packer pressure and interval section. The test results show that the cracks along with the guide slots were induced either by the double packer pressurization or the injection of hydraulic pressure into interval section, some cracks extended across the boreholes. Therefore, the hydraulic rock splitting test is expected to control efficiently the induced cracks if the guide slots are engraved in the direction of splitting and a big flow rate is applied.
Keywords
hydraulic rock splitting; induced crack; guide slot; hydraulic pressure; staddle packer pressurization; free surface;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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