Rock Mass Analysis in the Breksi Pumice Mine, Hargomulyo Region, Gunung Kidul Regency, Special Region of Yogyakarta

Abstract

Pumice breccia is a rock that can be used as a building material, and many people mine pumice breccia without paying attention to the safety of slopes caused by mining. The aim of the research is to determine the rock mass in the pumice breccia mine, because the mine is a community mine which is susceptible to rock slides. The research method used is weightingRock Mass Rating (RMR. The analysis results are based on rock class classification Rock Mass Rating (RMR), in cross-section 1a belongs to class II, (good rock mass), cross section 1b belongs to class II (good rock mass), cross section 2a belongs to class II (good rock mass) and cross section 2b belongs to class II (good rock mass). Based on the rock mass class which is classified as good, the pumice breccia mining rock mass is quite prone to landslides.