Results 31 to 40 of about 70,920 (305)

Practical Applications of Strength Criteria in Civil Engineering Designs for Shallow Tunnels in Weak Rock

International Journal of Technology, 2019
A number of rock strength criteria are available for use in civil engineering designs. Although considerable uncertainty in geological conditions and variability in rock properties is involved in estimating rock mass strength, it may be necessary to ...
Didi S Agustawijaya
doaj   +1 more source

Peak Shear Strength of Natural, Unfilled Rock Joints in the Field Based on Data from Drill Cores – A Conceptual Study Based on Large Laboratory Shear Tests

, 2022
Significant uncertainties remain regarding the field assessment of the peak shear strength of rock joints. These uncertainties mainly originate from the lack of a verified methodology that would permit prediction of rock joints’ peak shear strength ...
Ríos Bayona, Francisco,, Ivars, Diego Mas,, Johansson, Fredrik,, Larsson, Jörgen,   +3 more
core   +2 more sources

Evolution law and mechanisms of permeability of organic rocks under the action of thermal-mechanical coupling

Meitan xuebao
In in-situ modified fluidized mining, the use of high temperatures to treat ore deposits is an effective method. Exploring the evolution law of pyrolysis characteristics, microstructure, permeability, deformation, etc.
Zengchao FENG, Jianhang SHI
doaj   +1 more source

Geological process and carbon cycle significance of graphite carbon material in faults and subduction zones

地质科技通报, 2022
Carbon is a common element in nature that exists in various forms, including single minerals (e.g., graphite and diamond), compounds (e.g., carbonate and carbon dioxide) and organic carbon in organisms.
Shuyun Cao, Dingkui Zhou
doaj   +1 more source

Strength of Rock-Like Specimens with Pre-existing Cracks of Different Length and Width [PDF]

, 2016
Discontinuities play a key role in the failure process of rock and rock mass. Small fractures can decrease the strength of rock while large-scaled joints can have a significant effect on the overall stability of rock mass (Eberhardt et al.
Yeung, Chong, Gratchev, Ivan, Kim, Dong Hyun, Yeung, Chong Kit   +3 more
core   +1 more source

Prediction of Peak Shear Strength of Natural, Unfilled Rock Joints Accounting for Matedness Based on Measured Aperture

, 2021
The mechanical behaviour of natural, unfilled rock joints is influenced by the interaction between surface roughness and matedness of the contact surfaces. In the field, natural rock joints normally exhibit a mismatch between the contact surfaces, mainly
Ríos Bayona, Francisco,, Ivars, Diego Mas,, Johansson, Fredrik,   +2 more
core   +1 more source

Similar simulation test of the mechanical properties of layered composite rock mass

Energy Science & Engineering
Most of the mine roadways in China are located in layered rock mass. To study the mechanical properties of a layered rock mass, the uniaxial compression test was carried out on the layered composite rock mass composed of sand and paraffin.
Jichun Kang, Jiayi Guo, Meng Wang, Sijiang Wei, Yajun Xin   +4 more
doaj   +1 more source

Experimental studies of scale effects on shear strength, and deformation of rock joints [PDF]

, 1980
The effect of scale on shear strength is studied by performing direct shear tests on different sized samples of large joints. A rubber moulding system is used to obtain impressions of the roughness from a variety of natural joint surfaces.
Bandis, Stavros
core  

Effect of multiple loading rates on uniaxial compressive strength of rock

, 2022
It is of crucial significance to study the effect of loading rate on the behaviour of rock because engineering structures are subjected to multiple loading conditions in their entire life. Although rock behaviour under single loading rate has been widely
Meerza, J., Khandelwal, Manoj
core  

Large‐scale bidirectional arrayed genetic screens identify OXR1 and EMC4 as modifiers of αSynuclein aggregation

FEBS Open Bio, EarlyView.
Activation of the mitochondrial protein OXR1 increases pSyn129 αSynuclein aggregation by lowering ATP levels and altering mitochondrial membrane potential, particularly in response to MSA‐derived fibrils. In contrast, ablation of the ER protein EMC4 enhances autophagic flux and lysosomal clearance, broadly reducing α‐synuclein aggregates.
Sandesh Neupane, Lea Nikolić, Lorenzo Maraio, Thomas Goiran, Nathan Karpilovsky, Stefano Sellitto, Vangelis Bouris, Jiang‐An Yin, Ronald Melki, Edward A Fon, Adriano Aguzzi, Elena De Cecco   +11 more
wiley   +1 more source