Results 41 to 50 of about 483 (196)

The Impact of Elastoplastic Deformation Behavior on the Apparent Gas Permeability of Deep Fractal Shale Rocks

Fractal and Fractional
Deep shale gas reservoirs are vital sources of unconventional natural gas and present unique challenges for exploration and development due to their multiscale flow characteristics and elastoplastic deformation behavior of reservoir rocks.
Xu Zhou, Zhaoqin Huang, Aifen Li, Jun Yao, Xu Zhang   +4 more
doaj   +1 more source

Review and prospects of shear test of bolted rock joints

Deep Underground Science and Engineering, EarlyView.
The laboratory shear test equipment, test method, and numerical simulation of bolted rock joints were summarized. The shortcomings and limitations of the current research were analyzed, and the research prospects were proposed. Abstract Rock bolting is a critical approach in geotechnical engineering for supporting weak rocks.
Shulin Ren, Fan Yang, Manchao He, Yong Yuan, Zhigang Tao   +4 more
wiley   +1 more source

Modeling and experimental validation of bolt–grout bond–slip behavior for deep underground excavation support

Deep Underground Science and Engineering, EarlyView.
A novel shear‐lag model, validated by pull‐out tests, incorporates a constant bond stress stage to predict the complete load–displacement response of grouted rock bolts, providing a new tool for optimizing anchorage length and material toughness in deep underground engineering. Abstract The stability of rock masses in deep underground excavations, such
Wenhui Bian, Xiaohui He, Kexue Wang, Yufei Wu, Guoxin Wang, Shaochen Zhang, Jun Yang   +6 more
wiley   +1 more source

Temperature-dependent deformation of methane hydrate within phase boundary

Journal of Materials Research and Technology
Natural gas hydrates preserve a huge amount of methane, yet are highly sensitive to temperature fluctuations, especially under conditions close to the phase equilibrium boundary.
Yuan Zhou, Yanlong Li, Zhengcai Zhang, Minhui Qi, Yunkai Ji, Qingguo Meng, Yilin Fu, Nengyou Wu   +7 more
doaj   +1 more source

Analytical stress solution framework for lined compressed air energy storage chambers and its application to safe burial depth determination and supporting effectiveness evaluation

Deep Underground Science and Engineering, EarlyView.
An analytical framework delivers a closed‐form stress solution for lined compressed air energy storage chambers, enabling the determination of the minimum safe burial depth. The solution quantitatively evaluates lining support effectiveness, offering a reliable tool for chamber design and optimization.
Zeyuan Sun, Cheng Zhao, Jinquan Xing, Qinyuan Luo   +3 more
wiley   +1 more source

Dynamics of the Euler — Bernoully beam with distributed hysteresis properties

Вестник Самарского университета: Естественнонаучная серия
In this paper, we present a new mathematical approach to the analysis of a beam with distributed hysteresis properties. These hysteresis characteristics are described by two methods: phenomenological (Bouc — Wen model) and constructive (Prandtl ...
Evgeny A. Karpov
doaj   +1 more source

Advancing mine pillar design: Evaluating traditional methods and integrating AI for enhanced stability of pillars in the Great Dyke, Zimbabwe

Deep Underground Science and Engineering, EarlyView.
B1 is bord width 1, B2 is bord width 2, L is the pillar length, W is the pillar width, red color and letter A represent the pillars, and white color and number 1 represent excavated areas. Pstress is the average pillar stress; σv is the vertical component of the virgin stress, MPa; and e is the areal extraction ratio. e = B o B o + B P ${\rm{e}}=\frac{{
Tawanda Zvarivadza, Hendrik Grobler, Peter Apata Olubambi, Moshood Onifade, Manoj Khandelwal   +4 more
wiley   +1 more source

Overview of Thermo-Hydro-Mechanical Constitutive Models for Saturated Cohesive Soils

Geosciences
The need to mathematically model and numerically simulate the effect of temperature on the hydro-mechanical behavior of soils, driven by the increased interest in energy geostructures and sundry other geothermal systems, has necessitated the development ...
Meysam Mashayekhi, Victor N. Kaliakin
doaj   +1 more source

Elastoplastic design theory for ultra-deep frozen wall considering large deformation features

Yantu gongcheng xuebao, 2019
The freezing method is a key sinking method used in deep aquifer. The frozen-wall design theory is a key technique for the freezing method. However, the previous design theories for a deep artificial frozen wall have neglected the influences of side-wall
ZHANG Bo , YANG Wei-hao , WANG Bao-sheng
doaj   +1 more source

Fracture evolution of a thick soft protection layer and the water inrush mechanism in overburden under longwall mining

Deep Underground Science and Engineering, EarlyView.
Through shear–tensile creep tests and viscoelastic modeling, the fracture evolution of thick soft protective layers is clarified. Results show thickness‐dependent rheological failure modes that govern four types of roof water inrush, providing a mechanism‐based framework for hazard prediction and control. Abstract In the Jurassic coal‐bearing strata of
Mengnan Liu, Wei Qiao, Xianggang Cheng, Xiangsheng Meng, Peichao Feng   +4 more
wiley   +1 more source