Determination of Rock Quality Designation (RQD) through Spectral Analysis Surface Wave (SASW) and Observed Method for Granitic Rock Mass

. Asrillah

Abstract


Spectral Analysis Surface Wave (SASW) and observation method were carried
out at Kajang Rock Quarry Sdn. Bhd which is located in district Semenyih-Selangor. The objective of this survey is to determinate Rock Quality Designation (RQD) of the granitic rock mass quarried from terrace 9 (highest) to terrace 7. The SASW survey was conducted with using OROS 25 and the software that used for data processing is Winsasw 3.1.3. The Rock Quality Designation (RQD) for terrace 9 varies from 45.63 % to 94.17 %. Base on
Suharsono rock classification system, these two values suggest that the rock mass is easy rippable and need blasting. The RQD for terrace 8 are 40.12 %, 72.43 %, 80.35 % and 99.39 % which are classified as easy rippble, hardly rippable, required hydraulic breaker and blasting. The terrace 7 has three RQD show that the rock mass requires hydraulic breaker and blasting


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