Results 1 to 10 of about 3,836,789 (239)

Characteristics of in situ stress field of coalbed methane reservoir and its influence on permeability in western Guizhou coalfield, China

open access: yesFrontiers in Earth Science, 2023
In-situ stress is an important indicator for the preferential selection of coalbed methane (CBM) exploration dessert zones, and is a key factor affecting the production capacity of coalbed methane wells.
Fang Lv   +16 more
doaj   +1 more source

Temperature Effect on Mohr–Coulomb’s Effective Strength Parameters of Paste Backfill

open access: yesFrontiers in Materials, 2022
In-stope paste backfill monitoring at different mine sites showed anomalous increase in total stress during rest periods. One of the explanations according to a recent laboratory- model experiment was attributed to volumetric expansion caused by ...
Alsidqi Hasan, Wee Kiet Ting
doaj   +1 more source

Seepage Law of Nearly Flat Coal Seam Based on Three-Dimensional Structure of Borehole and the Deep Soft Rock Roadway Intersection

open access: yesEnergies, 2022
Exploring the evolution characteristics of gas seepage between boreholes during the drainage process is critical for the borehole’s layout and high-efficiency gas drainage.
Lei Zhang   +4 more
doaj   +1 more source

The Study of Multi-Stage Cold Forming Process for the Manufacture of Relief Valve Regulating Nuts

open access: yesApplied Sciences, 2023
Cold forging is widely used in many industries. Multi-stage cold forming is usually utilized in forging fasteners. In this study, numerical simulation and experimental investigations were carried out on a five-stage cold-forming process for the ...
Chih-Cheng Yang, Chi-Hsuan Liu
doaj   +1 more source

Clay Mineral Type and Content Control Properties of Fine-Grained CO2 Caprocks—Laboratory Insights from Strongly Swelling and Non-Swelling Clay–Quartz Mixtures

open access: yesEnergies, 2022
Understanding and predicting sealing characteristics and containment efficiency as a function of burial depth across sedimentary basins is a prerequisite for safe and secure subsurface storage.
Mohammad Nooraiepour
doaj   +1 more source

Use of the Dynamic Cone Penetrometer in Compacted Clay–Sand Layers

open access: yesApplied Sciences, 2022
The ASTM D6951 suggests a test method using the dynamic cone penetrometer (DCP) for the assessment of shallow pavement strength. This study is dedicated to evaluating a similar test method to be used for fine-grained clay–sand mixtures, which are ...
Muawia Dafalla   +2 more
doaj   +1 more source

Analysis of Concrete Failure on the Descending Branch of the Load-Displacement Curve

open access: yesCrystals, 2020
In this paper, load-displacement and stress-strain diagrams are considered for the uniaxial compression of concrete and under three-point bending. It is known that the destruction of such materials occurs on the descending branch of the load-displacement
Gennadiy Kolesnikov
doaj   +1 more source

Lower shakedown limits of layered road structures under moving harmonic loads

open access: yesYantu gongcheng xuebao, 2022
The shakedown limits of layered road structures subjected to a moving harmonic load are studied. The inverse Fourier transform and the numerical integration are used to obtain the dynamic responses of a three-dimensional layered road structure in the ...
LIN Yuan-xiang , ZHENG Jun-jie , HOU Ru-yi , FANG Hao
doaj   +1 more source

Theory of Effective Stress in Soil and Rock and Implications for Fracturing Processes: A Review

open access: yesGeosciences, 2021
The effective stress principle (ESP) plays a basic role in geology and engineering problems as it is involved in fundamental issues concerning strain and failure of rock and soil, as well as of other porous materials such as concrete, metal powders ...
Vincenzo Guerriero, Stefano Mazzoli
doaj   +1 more source

Influence of Effective Stress on Anisotropy of High-rank Coalbed Methane Reservoir

open access: yesMeikuang Anquan, 2020
In order to study the effect of the increase of effective stress on the anisotropy of permeability and porosity of CBM formation during the development process of CBM reservoir, coal samples from different directions are adopted and the anisotropy of ...
FENG Xingwu, WANG Shusen, YU Xiaoyan, CHANG Libo, ZHANG Kun
doaj   +1 more source

Home - About - Disclaimer - Privacy