Fracture System and Rock-Mass Characterization by Borehole Camera Surveying: Application in Dimension Stone Investigations in Geologically Complex Structures

The successful exploration of dimension stone mainly depends on the quality, size, and shape extractable blocks stone. investigated area is in Pelješac Peninsula (Croatia), External Dinarides orogeny, built from thick carbonate succession, characterized by relatively small deposits high-quality These conditions demand challenging geological investigations “pre-quarry” phase to find optimal quarry location. size are controlled fracture pattern systems. In rugged, covered terrains, it very hard obtain a satisfactory amount data surface, so necessary collect them underground. Borehole camera technology can visualize inner part rock mass measure characteristics. main conclusions as follows: (1) digital borehole provides quick, effective, low-cost survey fractured mass; (2) statistical distribution parameters, P10, spacing, Volumetric Joint Count (Jv) based wall reflect integrity mass, providing solid decision-making base for further investment plans excavation method.