A new tunnel inflow classification (TIC) system through sedimentary rock masses

2013 ◽  
Vol 34 ◽  
pp. 1-12 ◽  
Author(s):  
H.R. Zarei ◽  
A. Uromeihy ◽  
M. Sharifzadeh
Keyword(s):  
Sedimentary Rock ◽  
Rock Masses ◽  
Tunnel Inflow

Rock mass classification for sedimentary rock masses in Indonesia coal mining areas

2020 ◽  
Author(s):  
Singgih Saptono ◽  
M. Rahman Yulianto ◽  
Vega Vergiagara ◽  
Herry Sofyan
Keyword(s):  
Rock Mass ◽  
Coal Mining ◽  
Sedimentary Rock ◽  
Rock Mass Classification ◽  
Rock Masses ◽  
Mining Areas ◽  
Mass Classification

Shear strength of discontinuities in sedimentary rock masses based on direct shear tests

2015 ◽  
Vol 75 ◽  
pp. 119-131 ◽  
Author(s):  
Manouchehr Sanei ◽  
Lohrasb Faramarzi ◽  
Ahmad Fahimifar ◽  
Sareh Goli ◽  
Abolfazl Mehinrad ◽  
...  
Keyword(s):  
Shear Strength ◽  
Sedimentary Rock ◽  
Direct Shear ◽  
Rock Masses ◽  
Shear Tests ◽  
Direct Shear Tests

Reconnaissance of rockslide hazards in Kananaskis Country, Alberta

1987 ◽  
Vol 24 (3) ◽  
pp. 414-429 ◽  
Author(s):  
D. M. Cruden ◽  
T. M. Eaton
Keyword(s):  
Key Words ◽  
Rocky Mountains ◽  
Sedimentary Rock ◽  
Rocky Mountain ◽  
Friction Angle ◽  
Thrust Faults ◽  
Rock Masses ◽  
Canadian Rockies ◽  
Basic Friction Angle ◽  
New Facilities

Kananaskis Country is situated in the Front Ranges of the Canadian Rockies in southwestern Alberta. Sedimentary rock thrust northeastwards forms mountain ridges that trend northwest–southeast parallel to the major thrust faults. Older, Palaeozoic rocks—mainly limestone and dolomite—form the ridges and peaks. Younger, Mesozoic rocks—sandstones, quartzites, siltstones, shales, conglomerates, and coals—are more easily eroded and form mountain passes and valleys.A reconnaissance mapped 228 rockslides, 8 km2 of rockslide debris and 96 km2 of talus. The largest rockslide exceeds 50 × 106 m3. Rockslides are most probable in the Devonian Palliser Formation, then in the Permo-Pennsylvanian Rocky Mountain Group, Mississippian Rundle Group, Devonian Fairholme Group, Mississippian Banff Formation, and the younger detrital rocks. Rockslides are most probable on dip and overdip slopes, followed by reverse-dip slopes, oblique and strike-dip slopes, and underdip slopes. Large rock masses have not slid on slopes below their basic friction angle, [Formula: see text]The reconnaissance shows that certain facilities in valleys below steep mountain slopes are exposed to rockslide hazards, and provides a guide for the location of new facilities. Analyses of two mountain slopes show that there are large, hypothetical hazards in Kananaskis. Rockslides are likely and could be destructive. Key words: Front Ranges, Rocky Mountains, Alberta, rockslides, hazards.

scholarly journals Surface and subsurface engineering geological mapping for empirical designs of excavation method and support system of Tunnel 6 of Jakarta-Bandung high speed railway, Indonesia

2021 ◽  
Vol 325 ◽  
pp. 01018
Author(s):  
Octavika Malda ◽  
I Gde Budi Indrawan ◽  
Akmaluddin Akmaluddin
Keyword(s):  
Rock Mass ◽  
Support System ◽  
High Speed ◽  
Sedimentary Rock ◽  
Geological Mapping ◽  
Rock Masses ◽  
Engineering Geological Mapping ◽  
High Speed Railway ◽  
Volcanic Formation ◽  
Subsurface Engineering

Empirical design of support system at the Tunnel 6 of the Jakarta – Bandung high-speed railway was based on the Basic Quality (BQ) system, which had not been adopted in Indonesia. This research was carried out to better understand the rock mass quality at the tunnel construction site by comparing rock mass quality determined by the BQ system to that determined by two more popular rock mass classifications, namely the Geological Strength Index (GSI) and Rock Mass Rating (RMR). Surface and subsurface engineering geological mapping were carried out and tunnel excavation method and support system were proposed. The engineering geological model of the BQ, GSI, and RMR systems showed that the sedimentary rock masses of the Miocene Jatiluhur Formation generally had poor to very poor quality, while those of the Quaternary Volcanic Formation had very poor to good quality. Based on the RMR, the stand-up time values of the sedimentary rock masses were predicted to be relatively low as compared with those of the Quaternary Volcanic Formation, implying requirement of a relatively quick support system installation after excavation. In general, a combination of systematic bolt, shotcrete and steel ribs is the recommended support system for this tunnel.

scholarly journals Rinded, Iron-Oxide Concretions in Navajo Sandstone Along the Trail to Upper Calf Creek Falls, Garfield County

Geosites ◽  
2019 ◽  
Vol 1 ◽  
pp. 1-7
Author(s):  
David Loope ◽  
Richard Kettler
Keyword(s):  
Iron Oxide ◽  
Sedimentary Rock ◽  
Hard Rock ◽  
Central Zone ◽  
Central Core ◽  
Rock Masses ◽  
Navajo Sandstone ◽  
Siderite Feco3 ◽  
Garfield County

Concretions are hard rock masses, usually spheroidal, but commonly oblate or discoidal, that are formed by strongly localized precipitation of minerals in the pores of an otherwise weaker sedimentary rock (see Bates and Jackson, 1980, for a more extensive definition). The iron-oxide-rich concretions in the Jurassic Navajo Sandstone in southern Utah are unusual in two fundamental ways. First, they are cemented by iron oxide (Fe2O3, or Fe(OH)3); most other concretions are cemented by silica (SiO2), calcite (CaCO3), dolomite (CaMg(CO3)2), or siderite (FeCO3). Second, unlike other concretions, they are not strongly cemented throughout, but instead, the iron oxide is concentrated in a very strongly cemented, sharply defined, exterior rind or shell. In the smaller concretions, the entire interior lacks iron-oxide cement, and is similar to the rock outside the concretion; in the larger concretions, there is a central zone that is strongly cemented by iron oxide, but the sandstone between the central core and the rind has no iron-oxide cement.

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