China
Africa
Explore chapters and articles related to this topic
Properties of soft rocks with particular reference to Indonesian mining conditions
Published in Wang Sijing, Fu Bingjun, Li Zhongkui, st Century, 2020
S. Kramadibrata, K. Matsui, Ma Rai, H. Shimada
Some rock shows the slaking phenomenon when the rock comes in contact with water. This phenomenon must be understood and considered in designing the rock engineering structures. Especially in Indonesia, the stability of cutting benches and highwalls is a key considering factor in many open pit mines in rainy season. And securing the stability of waste rock pile is another important problem in open pit mines.
Analysis of seepage behavior of the grout into roadway floor
Published in Heping Xie, Yuehan Wang, Yaodong Jiang, Computer Applications in the Mineral Industries, 2020
T. Sasaoka, M. Koga, H. Shimada, S. Kubota, K. Matsui
In underground coal mines, mine tunnels or roadways are driven in coal measures strata. The coal measures rocks in Japan are sandstone, shale, sandyshale, mudstone, tuff, congromerate, etc. Ground control problems in roadway drivage and maintenance are always closely connected with weak rock and soft rocks such as shale and mud-stone. Shale and mudstone are prone to slaking in the presence of water because they contain clay minerals such as kaolinaite and montmollironite that have great water absorption properties. Deterioration of these rocks strength due to water cause a significant decrease in the stability of the excavation and rock, and the fall of a roof and/or a rib and the floor heave may occur.
Salt-Affected Soils: Physical Properties and Behavior
Published in Brian D. Fath, Sven E. Jørgensen, Megan Cole, Managing Soils and Terrestrial Systems, 2020
Slaking can be managed at the macroaggregate level by avoiding or minimizing the breakdown of existing bonds (organic matter) through minimizing soil disturbance (zero or minimum tillage practices) and/or through the addition of surface mulch or aggregate bonding materials such as organic matter,[39] polymers [polyvinyl alcohol (PVA), polyacrylamide (PAM)], and calcium carbonates (lime). It can also be achieved by incorporating grasses into the existing crop rotation as grass roots and associated fungal hyphae bind microaggregates into macroaggregates.[40]
Experimental study of slaking properties of red-bed mudstones from the Three Gorges Reservoir area
Published in Marine Georesources & Geotechnology, 2019
Peiwu Shen, Huiming Tang, Lei Huang, Dingjian Wang
The slaking of weak rocks (e.g., mudstones and clay-bearing rocks) plays an important role in slope destabilization, embankment failure, and dam foundation seepage deformation as well as other processes. Slaking, which is affected by mineral composition, textural features, water and temperature, significantly reduces rock strength (Dhakal et al. 2002; Gautam and Shakoor 2016). Strength degradation due to slaking tends to occur on riverside slopes and marine embankments (Bell, Barber, and Smith 1975; Koncagül and Santi 1999; Miščević and Vlastelica 2014).
Characterization of rock formation at Toshka fourth depression – Egypt
Published in HBRC Journal, 2022
Mohie Elmashad, Salwa Yassin, Mona Afifi
Slaking test which is the measure for rock sample resistance to weakening and disintegration resulting from a standard cycle of drying and wetting named slaking was carried out in accordance with ASTM D4644 [10]. The main purpose of this test is to evaluate qualitatively the durability of rock samples in a server environment using the following equation: