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Rock elasticity is a mechanical property that describes how much value a rock has to survive before deformation occurs. Poisson's ratio is a comparison value between axial strain and elasticity possessed by rocks which is able to describe rock lithology in formation. The Unconfined Compressive Strength (UCS) method is one of the methods of testing rock mechanics by pressing rocks from one direction (horizontal) until the rock is collapse or fracture. This method is carried out in the Hydraulic Fracturing design. The samples used are sandstone core rock samples with terms of length (L) / diameter (D) = 2. Data processing is done by calculating the results of reading data changes in length (ΔL) and diameter (ΔD), and stress (σ), to get the value of each sample, namely: ɛlateral, ɛaxial, ɛvolumetric, Poisson's Ratio, Young's Modulus. Based on the results of measurement and processing of data, the average UCS stress value is 7.71 MPa, and the average elasticity stress is 6.23 MPa. While the Young Modulus value is 1.15 Gpa, and Poisson's Ratio is 0.24. The lithology type of 6 rock samples as a whole can be interpreted as Soft Sandstone.

Uji Laboratorium Mekanika Batuan Menggunakan Metode Unconfined Compressive Strength (Ucs) Pada Batuan Inti (Core) Batu Pasir