IDENTIFIKASI STRUKTUR BATUAN BAWAH PERMUKAAN MENGGUNAKAN METODE SEISMIK REFRAKSI DI KAMPUNG BARU BANJARBARU

Sumaos Triningsih, Ibrahim Sota, Sri Cahyo Wahyono

Abstract


ABSTRACT: It has been researched graving hole of ex-coal mining using refraction
seismic method in Kampung Baru Banjarbaru. The hole is filled by water as acid
puddle, where it is worried to flow through to soil layer by following the plot of rock
layer’s slope. Identification of subsurface structure of the area is in order to know the
direction of the water’s flow. Seismograph PASI 24 Channel has been used to collect
data. The data has been processed using intercept time method. Interpretation results
show the subsurface in residential area has 3 layers. First layer is decayed layer with
wave velocity (295-413 m/s) and thickness (2.8-5.57) m. Second layer with wave
velocity (787.4-919) m/s and thickness (10-11.66) m is interpreted as sand and gravel.
Whereas, third layer with wave velocity (1282-2020) m/s and area boundary between h2
dan h3 about (13.42-16.01) m is interpreted as clay (waterproof layer).
Keywords: Seismic refraction, Intercept time method, Banjarbaru


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DOI: http://dx.doi.org/10.20527/flux.v10i2.2642

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