Results 51 to 60 of about 41,310 (228)

Numerical study of coal reservoir and borehole parameters evaluation considering temperature and multi-borehole superposition effects

Scientific Reports
To reveal the effects of temperature on the effective extraction radius and coal reservoir parameters during gas extraction in bedding boreholes, a hydraulic-mechanical coupling model (HM) and a thermal–hydraulic-mechanical coupling model (THM) for ...
Nan Fan, Yonggang Qiao, Changhua Liu, Aiguo Wang, Cunbao Deng, Xi Chen   +5 more
doaj   +1 more source

Double Unloading Gas Control Technology for Fracturing Soft Coal Seams in Overlying Key Strata

Applied Sciences
Based on the ‘three highs and one low’ geological conditions of high gas pressure, high gas content, high ground stress, and low permeability in deep coal seams, this study proposes a dual method of hydraulic fracturing of key layers of overlying rock ...
Jun Xie, Feng Li, Zhengxu Yan, Jingjing Huo   +3 more
doaj   +1 more source

Numerical simulation on gas drainage and borehole arrangement parameters of bedding borehole in a coal mine

Gong-kuang zidonghua, 2018
Based on comprehensive consideration of gas flow inertia and slippage effect, a gas drainage flow model was established. Based on engineering background of 12150 coal face of the No.15 coal seam in Songhe Coal Mine, the distribution law of gas pressure ...
ZHANG Bo, XIE Xionggang, XU Shiqing
doaj   +1 more source

Research and Application of Hydraulic Punching Pressure Relief Antireflection Mechanism in Deep “Three-Soft” Outburst Coal Seam

Shock and Vibration, 2021
To solve the problems of gas predrainage in deep seams with “three softs” and low-air permeability, hydraulic punching pressure relief antireflection technology is proposed on the basis of the research background of gas predrainage technology in Lugou ...
Beifang Gu, Yanling Wu
doaj   +1 more source

Structural studies and functional engineering of NanX: an anhydro‐sialic acid transporter from Escherichia coli

FEBS Open Bio, EarlyView.
Biophysical characterisation shows that NanX, a membrane transport protein from the major facilitator superfamily (MFS), forms both monomers and dimers after purification. AlphaFold modelling and substrate docking provide information on residues likely involved in substrate recognition for NanX and another MFS member, NanT.
Michael C. Newton‐Vesty, Kelsi R. Hall, Zachary D. Tillett, Liam S. Turk, James S. Davies, Michael J. Currie, Hamish G. Brown, Sepideh Valimehr, Peter D. Mace, Andrew E. Whitten, Santosh Panjikar, Eric Hanssen, Rachel A. North, Renwick C.J. Dobson   +13 more
wiley   +1 more source

Baseline Regional Cholinergic Denervation Predicts Cognitive Trajectories in Moderate Parkinson Disease

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Cognitive decline is a disabling and variable feature of Parkinson disease (PD). While cholinergic system degeneration is linked to cognitive impairments in PD, most prior research reported cross‐sectional associations. We aimed to fill this gap by investigating whether baseline regional cerebral vesicular acetylcholine transporter ...
Taylor Brown, Giulia Carli, Prabesh Kanel, Stiven Roytman, Jaimie Barr, Nicolaas I. Bohnen, Roger L. Albin   +6 more
wiley   +1 more source

Effect of Spherical Indenter Radius on Hardness and Extraction Mechanical Property of RAFM Steel under Ion Irradiation

Yuanzineng kexue jishu, 2023
Currently, ion irradiation is commonly used to simulate neutron irradiation under specific conditions. Additionally, the nanoindentation testing system is extensively utilized for measuring the microscopic mechanical properties of materials that have been subjected to ion irradiation. One disadvantage of ion irradiation is its limited penetration depth,
openaire   +1 more source

Paramagnetic Rim Lesions Are Associated With Trans‐Synaptic Degeneration of the Visual Pathway in Multiple Sclerosis

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objectives Retrograde trans‐synaptic degeneration (rTSD) from posterior visual pathway lesions in multiple sclerosis (MS) is characterized by hemi‐macular ganglion cell‐inner plexiform layer (GCIPL) thinning and contralateral visual field loss.
Abdul Jaber Tayem, Angel Liu, Sargis Manukyan, Mustafa Subhi, Elaina Luskin, Bryan Quah, Sreekanth Madhusoodhanan Nair, Arzu C. Has Silemek, Gabriela Zabala, Yujie Cui, Laura Locke, Paula Barreras, Marwa Kaisey, Vinicius Calsavara, Daniel S. Reich, Nancy L. Sicotte, Pascal Sati, Omar Al‐Louzi   +17 more
wiley   +1 more source

Numerical simulation of boreholes for gas extraction and effective range of gas extraction in soft coal seams

Energy Science & Engineering, 2019
Gas disasters are a major factor influencing safe production in mines: Gas extraction can reduce the gas content in coal seams, providing a guarantee of safer production.
Pan Wei, Changwen Huang, Xuelong Li, Shoujian Peng, Yanan Lu   +4 more
doaj   +1 more source

Permeability enhancement of deep hole pre-splitting blasting in the low permeability coal seam of the Nanting coal mine. [PDF]

PLoS ONE, 2018
To solve the hidden danger of high methane and low permeability gas in the coal mining process, potentially affecting the safety production in an orderly way, we propose the use of deep hole blasting technology to improve the permeability of the coal ...
Zhengyi Ti, Feng Zhang, Jin Pan, Xiaofei Ma, Zheng Shang   +4 more
doaj   +1 more source