Results 41 to 50 of about 4,596,099 (356)

Study on the characteristics of gas permeability of coal under loaded stress [PDF]

, 2017
The #3 coal seam of Jinsheng Rundong Ltd. of Jin-Coal Group in Shanxi Province, China, has high gas content and pressure; however, it has a low gas permeability, which can easily cause gas enrichment and may cause accidents of coal and gas outbursts.
Li, Dengke, Li, Xinping, Qu, Dengxing, Wang, Gongzhong, Zhang, Jianhua   +4 more
core   +1 more source

The Pressure induced by salt crystallization in confinement [PDF]

Scientific Reports, 2016
AbstractSalt crystallization is a major cause of weathering of rocks, artworks and monuments. Damage can only occur if crystals continue to grow in confinement, i.e. within the pore space of these materials, thus generating mechanical stress. We report the direct measurement, at the microscale, of the force exerted by growing alkali halide salt ...
Desarnaud, J., Bonn, D., Shahidzadeh, N.
openaire   +4 more sources

Experimental Study on the Influence of Jet Dynamic Pressure Based on a New Confining Pressure Control System

Shiyou jixie
To address challenges such as low operating efficiency and poor descaling effect in jet stimulation operation of deep/ultra-deep wells， the influence of downhole environmental pressure （confining pressure） on jet dynamic pressure has been studied at home
Zhou Shijie, Lü Weiping, Liu Jiawei, Zhang Zheng, Zhu Ye, Luo Bin   +5 more
doaj   +1 more source

Numerical Investigation on the Hydraulic Fracture Evolution of Jointed Shale

Advances in Materials Science and Engineering, 2021
Joints are a common structure of heterogeneous shale rock masses, and in situ stress is the environment in which heterogeneous rock masses can be found. The existence of joint plane and confining pressure difference influences the physical properties of ...
Xiaoxi Men, Jiaxu Jin
doaj   +1 more source

Study on bump-prone property of coal under multi-stage confining pressure variable stress lower limit cyclic loading and unloading

Meikuang Anquan, 2023
The study of coal bump-prone property under confining pressure plays a key role in exploring the formation mechanism of coal burst in deep underground mines.
Chuanjiu ZHANG, Taotao DU, Jianhui REN, Xuanliang LI   +3 more
doaj   +1 more source

RC column strengthening by lateral pre-tensioning of FRP [PDF]

, 2003
This paper presents a unique strengthening technique for existing concrete columns that use expansive materials to apply lateral pre-tensioning. The technique increases the capacity and ductility of a column as well as achieving better utilisation of the
Ahmad, Ali A. Mortazavi, Fardis, Harries, Karbhari, Ki Sang Son, Kypros Pilakoutas, Mander, Meier, Mirmiran, Priestley, Saadatmanesh, Saadatmanesh, Saafi   +13 more
core   +1 more source

The fragmentation of expanding shells II: Thickness matters

, 2010
We study analytically the development of gravitational instability in an expanding shell having finite thickness. We consider three models for the radial density profile of the shell: (i) an analytic uniform-density model, (ii) a semi-analytic model ...
A. P. Whitworth, Boyd, Churchwell, Churchwell, Dale, Dawson, Deharveng, Deharveng, Deharveng, Deharveng, Deharveng, Ehlerová, Elmegreen, Elmegreen, Elmegreen, Fukui, Haffner, Hatzidimitriou, J. E. Dale, J. Palouš, Kim, McClure-Griffiths, R. Wünsch, Vishniac, Watson, Watson, Whitworth, Whitworth, Wünsch, Zavagno   +29 more
core   +1 more source

Investigation on gas migration in saturated materials with low permeability [PDF]

, 2015
International audienceInvestigation of the hydro-mechanical effects on gas migration in saturated materials with low permeabilityis of great theoretical and practical significances in many engineering fields.
Chen, Bao, Chen, Yonggui, Cui, Yu-Jun, Xu, Long, Ye, Bin, Ye, Weimin   +5 more
core   +4 more sources

A coupled CFD‐DEM investigation of suffusion of gap graded soil: Coupling effect of confining pressure and fines content

International journal for numerical and analytical methods in geomechanics (Print), 2020
Suffusion involves fine particles migration within the matrix of coarse fraction under seepage flow, which usually occurs in the gap‐graded material of dams and levees.
Yajing Liu, Lizhong Wang, Yi Hong, Jidong Zhao, Z. Yin   +4 more
semanticscholar   +1 more source

An Improved Damage–Plasticity Constitutive Model Capturing Rock Softening Behavior Under Various Confining Pressures

Applied Sciences
With the gradual depletion of shallow high-grade mineral resources, global mining activities are shifting toward deeper regions with more complex geological conditions.
Wei Huang, Juntao Ren, Peiyong Wang, Bingxiang Yuan, Junxuan Long, Haiqing Zhou, Rui Chen, Hao Li   +7 more
doaj   +1 more source