A thermoset PMS (Polyvinyl modified silicone) type polymer additive effect on load bearing capacities of cement grouted rock bolt specimens exposed to thermal cycles was investigated with a series experimental studies. The used in this study liquid phase while adding into the fresh mix and started solidify by polymerization after being mixed well grout. silicone based product selected use becau...

Empirical design of support system at the Tunnel 6 Jakarta – Bandung high-speed railway was based on Basic Quality (BQ) system, which had not been adopted in Indonesia. This research carried out to better understand rock mass quality tunnel construction site by comparing determined BQ that two more popular classifications, namely Geological Strength Index (GSI) and Rock Mass Rating (RMR). Surfa...

This paper presents experiences with design and construction process of the Tanju Tunnel, West Nusa Tenggara. The objective this research was to characterize volcanic intrusive rock masses for designs tunnel excavation method support system. Engineering geological investigations were carried out, upon which stand-up time estimated system determined based on mass classifications RMR (Bieniawski,...

The deformation control of roadways surrounded by rock in the fully mechanized amplification sections extra-thick coal seams is problematic. To analyze failure and characteristics a support frame, as well processes surrounding rock, through theoretical analysis industrial tests, conditions return airway caving face an seam Yangchangwan Coal Mine, Ningdong mining, area were examined. Combined wi...

The large deformation of soft rock tunnel is one the key problems to be overcome in construction stage. In present study, mechanism a representative and some related countermeasures are investigated using field tests engineering geological analysis. Owing scarce performances methods based on other criteria such as small pipe spacing, anchor bolt length steel frame new support scheme implemented...