Results 31 to 40 of about 272,354 (239)
Research on effective drainage radius and rational borehole spacing of parallel boreholes
Gong-kuang zidonghua, 2019 In order to determine rational borehole spacing of parallel boreholes for gas drainage, a fluid-solid coupling model of gas drainage was established by deducing gas migration equation of coal seam, deformation equation of coal and rock, and coupling ...
SANG Naiwen, YANG Shengqiang, SONG Yawei
doaj +1 more source
Results of the experimental research of the heat-transfer jet pressure to the rock surface during thermal reaming of the borehole [PDF]
, 2018 The performed analysis of scientific sources confirms the existence of a small number of publications devoted to the experimental research of the gasdynamics and plasmodynamics of jets used as a heat- transfer medium in the thermal ...
Potapchuk, Iryna +3 more
core +1 more source
Numerical investigation of flue gas injection enhanced underground coal seam gas drainage
Energy Science & Engineering, 2019 Coal seam with low permeability is widely distributed in China. Injection of flue gas (N2:CO2 = 0.85:0.15) is an effective approach to improve coal seam gas drainage efficiency. This process relates complex responses among ternary gases (CH4, CO2, and N2)
Bingjie Huo +3 more
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Drag force on a sphere moving towards an anisotropic super-hydrophobic plane
, 2011 We analyze theoretically a high-speed drainage of liquid films squeezed between a hydrophilic sphere and a textured super-hydrophobic plane, that contains trapped gas bubbles.
Asmolov, Evgeny S. +2 more
core +1 more source
Parametric survey of longitudinal prominence oscillation simulations [PDF]
, 2013 It is found that both microflare-sized impulsive heating at one leg of the loop and a suddenly imposed velocity perturbation can propel the prominence to oscillate along the magnetic dip.
Chen, P. F. +4 more
core +1 more source
Application of Regional Gas Drainage Technology System by Borehole Instead of Tunnel
Meikuang Anquan, 2020 To achieve safe mining in outburst coal seam, we systematically analyzed its technical characteristics, technical advantages, applicable conditions and technical mode of regional gas drainage technology with borehole instead of tunnel, and carried out ...
TAO Yunqi, ZHANG Fan, WU Jingang, LI Guodong, YU Hong
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Meitan xuebao, 2023 The pressure-relief gas drainage in longwall mining goaf is an important part of the simultaneous extraction of coal and gas in the green mining technology system. The horizontal-directional long boreholes arranged in overlying strata for pressure-relief
Mingjie GUO +5 more
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Electrical Conductivities of Conductors, Semiconductors, and Their Mixtures at Elevated Temperatures
Advanced Engineering Materials, EarlyView.This article presents a comprehensive review of temperature‐dependent electrical conductivity data for multiple material classes at elevated temperatures, highlighting a persistent conductivity gap between metals and semiconductors in the range of 102$\left(10\right)^{2}$– 107$\left(10\right)^{7}$ S/m. Metal–ceramic irregular metamaterials are proposed
Valentina Torres Nieto, Marcia A. Cooper
wiley +1 more source
Energies, 2022 Different types of deep-hole blasting techniques are needed to solve gas drainage problems in complex and variable cases. Blasting parameters suitable for mines are selected based on the relationship between blast stress field changes and gas flow ...
Haojun Wu +3 more
doaj +1 more source
Advanced Functional Materials, EarlyView.Edible electronics needs integrated logic circuits for computation and control. This work presents a potentially edible printed chitosan‐gated transistor with a design optimized for integration in circuits. Its implementation in integrated logic gates and circuits operating at low voltage (0.7 V) is demonstrated, as well as the compatibility with an ...
Giulia Coco +8 more
wiley +1 more source