Essays about: "Rock mass classification"

Showing result 1 - 5 of 6 essays containing the words Rock mass classification.

1. 1. Adapted data collection in field utilizing RMR and the Q-system

   University essay from Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

   Author : Amanda Olsson; [2024]
   Keywords : Rock mass classification; Q-slope; SMR; Slope stability;

   Abstract : The focus on slope stability has increased rapidly in Norway over the last years due to several unwanted landslides. In Norway, the most used method today to classify the rock mass and to determine the required reinforcement, is the Q-system. In addition to that the RMR method is also a commonly used method. READ MORE

3. 2. EVALUATION OF ENVIRONMENTAL AND TECHNICAL PERFORMANCE OF ALTERNATE FIBRES FOR SHOTCRETE IN TUNNELS

   University essay from KTH/Betongbyggnad

   Author : Shilpa Anand; [2022]
   Keywords : Shotcrete; Life cycle assessment; Environmental Product Declaration; Global warming potential; steel; basalt and synthetic fibres; flexural strength; energy absorption.;

   Abstract : Tunnels in hard and jointed rock are normally excavated in an arch shape to enable the rock mass to support its weight. Since the beginning of the 1980's, fibre reinforced shotcrete (FRS) in combination with rock bolts have been the dominating support method for hard rock tunnels. READ MORE

4. 3. U-Pb age constraints on the host rocks of the Barsele Norra Volcanogenic Massive Sulphide deposit, northern Sweden

   University essay from Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

   Author : Maria Sandlund; [2021]
   Keywords : Geochronology; Skellefte district; Barsele; VMS; LA-ICP-MS; SEM;

   Abstract : The Barsele area is located in the "Gold Line", southwest of the volcanogenic massive sulphide (VMS) Skellefte district which hosts more than 85 known VMS-deposits where some are gold-bearing. The Barsele area consists of the Central, Avan and Skiråsen intrusion hosted gold deposits, the Norra gold-bearing VMS-deposit and the Risberget zone. READ MORE

5. 4. Systematic errors in the characterization of rock mass quality for tunnels : a comparative analysis between core and tunnel mapping

   University essay from KTH/Jord- och bergmekanik

   Author : María Domingo Sabugo; [2018]
   Keywords : Rock mass classification; scale effect; RMR; tunnel mapping; borehole mapp ing; systematic error;

   Abstract : This thesis analyzes the potential systematic errorin the characterization of the rock mass quality in borehole and tunnel mapping. The difference when assessing the rock mass quality refers to the fact that the characterization performed on drilled rock cores are commonly done on-meter length, while the tunnel section can be up to 20-25 m wide. READ MORE

6. 5. Evaluation of the differences in characterization and classification of the rock mass quality : A comparison between pre-investigation, engineering geological forecast and tunnel mapping in the Northern Link project and the Cityline project

   University essay from KTH/Jord- och bergmekanik

   Author : Mehdi Benhalima; [2016]
   Keywords : Characterization; classification; rock mass quality; engineering geological forecast; tunnel mapping; discontinuities; Q-system; Northern Link;

   Abstract : In the construction of a tunnel, the characterization of the rock mass is performed in three different steps, in the pre-investigations, in the engineering geological forecast and in the tunnel mapping during construction. There has in previous work been observed that discrepancies exist between the results from these different steps, with a tendency to assign poorer rock mass quality in the tunnel mapping than in the pre-investigations and in the engineering geological forecast. READ MORE