Physical Characterization of a Deep Weathering Profile Over Rhyolite in Humid Tropical Peninsular MalaysiaSpringer Science and Business Media LLC - Tập 36 - Trang 3793-3809 - 2018
John Kuna Raj
The weathering profile, exposed at 38.2 km of the Kuala Lumpur—Karak Highway, can be differentiated into three broad zones; the topmost Zone I (pedological soil) comprising A, B and C soil horizons and made up of clayey silty sand with indistinct relict bedrock textures. The intermediate Zone II (saprock) consists of gravelly silty sand with distinct relict bedrock texture and structures, and can ...... hiện toàn bộ
Recommendations for a Quantitative Description of Joint Orientation DataSpringer Science and Business Media LLC - Tập 37 - Trang 1503-1514 - 2018
Marie-Hélène Fillion, John Hadjigeorgiou
A comprehensive joint orientation data collection program is necessary to ensure a sufficient degree of confidence in constructing a structural model. This paper investigates the influence of the number of joints sampled on the characterisation of the joint dip and dip direction. In a series of numerical experiments, Discrete Fracture Networks (DFNs) were used to model joint set populations. The a...... hiện toàn bộ
Influence of Petrogenesis on Suitability of Some Pelitic Rocks as Construction Aggregates in South-Eastern NigeriaSpringer Science and Business Media LLC - Tập 33 - Trang 1395-1407 - 2015
Celestine O. Okogbue, Tochukwu A. S. Ugwoke
Ten rock samples, collected from five studied Albian rock quarry units, were subjected to hand specimen and X-ray diffraction studies to determine their petrography and also to two degradability test versions of soaking and drying to simulate their resistance to intra-seasonal and inter-seasonal weathering that occurs in south-eastern Nigeria. Nine of the samples, which are pelitic in composition,...... hiện toàn bộ
Influencing Factors of the Rebreak of the Key Rock Block of the Main Roof in the GobSpringer Science and Business Media LLC - Tập 40 - Trang 4345-4356 - 2022
Yang Li, Yuqi Ren, Yikun Liu, Nan Wang, Xinghai Lei
In view of the phenomenon that upright triangular zone and inverted triangular zone of the collapsed roof appeared alternately in the gob, a mechanical model of the rebreak of the key rock block (KRB) of the main roof in the gob was established by using theoretical analysis. The main reason for the rebreak of KRB was revealed and the bending moment expression at any point of KRB was obtained. So, ...... hiện toàn bộ
Mechanism of the Mudstone Tunnel Failures Induced by Expansive Clay MineralsSpringer Science and Business Media LLC - Tập 35 - Trang 263-275 - 2016
Houjiang Zhang, Amoussou Coffi Adoko, Zhaojun Meng, Hao Wang, Yuyong Jiao
Expansive clay minerals can be a serious threat to underground rock structure because of their swelling behavior when absorbing water. Roof and wall collapse as well as large deformation were observed in Xiaotun Coal Mine, Guizhou Province, China. This paper studies the characteristics of expansive clays in order to understand the mechanism of the mudstone tunnel failures in the mine. The physical...... hiện toàn bộ
Probabilistic Analysis and Design of a Strip Footing on Layered Soil MediaSpringer Science and Business Media LLC - Tập 29 - Trang 1099-1108 - 2011
Priti Maheshwari, P. Pradeep Kumar
In the present paper, the analysis of a strip footing resting on a layered soil system has been carried out considering the elastic moduli of soil layers as random variables. Three layers of soil have been considered and the analysis employs Monte Carlo simulation. The modulus of elasticity has been considered as random variable having lognormal distribution. Factors of safety with respect to sett...... hiện toàn bộ