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Combined effect of pore water pressure and axial stress level on the unloading mechanical properties of sandstone
For the stability evaluation of excavation engineering located in reservoirs, the combined effect of pore water pressure P and axial stress level ASL ...
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Axial Behavior of Pressure Grouted Helical Piles Installed in Marine Soft Clay Based on Full-Scale Field Tests
Pressure grouted helical pile is an innovative soil–cement helical pile constructed by applying pressured grouting during the installation of the...
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Damage Analysis of Chemically Corroded Sandstone Under Cyclic Impacts and Axial Static Pressure
To explore the influence of cyclic impact and axial static pressure on the damage of chemically corroded sandstone, a series of cyclic impact tests...
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Understanding the Irreversible Evolution of Coal Permeability Under Cyclic Axial Deviatoric Stress
Coalbeds are subject to diverse load conditions stemming from hydraulic fracturing, mining activities, and geological tectonic forces. Understanding...
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Progressive Initiation Phenomenon of Radial and Axial Cracks of the Borehole During Rock Hydraulic Fracturing
Hard roof control is a technical problem that restricts the safe and efficient coal mine production. Hydraulic fracturing is an effective technical...
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Finite element analysis of axial–lateral interaction behavior of buried pipelines in dense sand
Safe operation of oil and gas carrying buried pipelines and ensuring their integrity during a geohazard event are of paramount importance. Geohazards...
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Electric Potential Response Characteristics and Constitutive Model of Coal Under Axial Static Load–Dynamic Load Coupling
The electrical and magnetic signals generated by coal fracture can expose the mechanical properties and fracture behavior of coal, which are of great...
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Aerodynamic Design of Axial Fan with Guide Vane for Reverse Air Flow
AbstractThe authors perform the aerodynamic design of axial fans with impeller and inlet guide vane to reverse air flow direction via killing...
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Predicting the Maximum Axial Capacity of Secant Pile Walls Embedded in Sandy Soil
Secant pile walls (SPWs) are frequently employed as temporary excavation support systems in urban areas; thus, they are useless once permanent...
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Design of High Speed Rotors for Axial Mine Fans
AbstractThe article presents the optimization design results for impellers of axial fans for main ventilation in mines using the criteria of minimum...
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A Study of Variation in the Initiation Pressure and Fracture Distribution Patterns of Raw Coal in SC-CO2 Fracturing Under the True Tri-axial System
Supercritical CO 2 (SC-CO 2 ) fracturing is a water-less fracturing technology that has attracted increasing attention in the coalbed methane mining...
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Study on Mechanical Property of Coal-Rock Combination Under Different Unloading Confining Pressure Rate
In order to study the failure characteristics of coal-rock assemblage under the condition of unloading confining pressure. This study carries out the...
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Experimental Study of Rockburst Induced by Multi-axial Cyclic Compression: A Case of Jisan Sandstone with a Circular Opening
In this study, a series of impact-induced rockburst experiments were carried out by applying multilevel cyclic stresses on a cubic sandstone with a...
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Study on the effect of axial and hydraulic pressure coupling on the creep behaviors of sandstone under multi-loading
The pressurized water-rock coupling has a great influence on the long-term stability of rock engineering. In order to study the effect of axial and...
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The effect of temperature on the mechanical behavior of Berea sandstone under confining pressure: experiments
For the first time, axial and circumferential (diametral) strains are measured directly on Berea sandstone cylindrical samples at different high...
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Constant Pressure Injection
In practical hydraulic fracturing, limited by the operating power of the syringe pump and long transportation of pipelines, it is often difficult to...
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Strength, deformation, and failure characteristics of hollow cylinder sandstone under axial–torsional tests
Due to the excavation disturbance in deep tunnel, the stress magnitude and orientation changed obviously, which affects the mechanical properties of...
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Evolution of the circumferential axial strain ratio and acoustic emission response of loaded rocks
Research on the deformation and failure of loaded rocks has a certain reference value in the fields of mining and geological hazard prediction. Here,...
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Numerical investigation on reinforced cement concrete helical piles subjected to combined axial and lateral loading
The research proposes the introduction of helices into the very popular reinforced cement concrete (RCC) piles to enhance the soil–pile interaction....
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‘Arm brains’ (axial nerves) of Jurassic coleoids and the evolution of coleoid neuroanatomy
Although patchy, the fossil record of coleoids bears a wealth of information on their soft part anatomy. Here, we describe remains of the axial nerve...
