Results 11 to 20 of about 2,180,312 (303)
Shock and Vibration, 2018 A series of tests on characteristics of acoustic emission have been performed on sandstone under uniaxial, conventional, and triaxial conditions and the unloading confining pressure path.
Tao Qin +6 more
doaj +1 more source
Geofluids, 2022 At present, the theory of supporting the surrounding rock small structure of gob-side entry driving has been widely used, but there is no specific quantitative analytical formula for the bearing strength and bearing characteristics of the structure ...
Shunjie Huang +6 more
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Shock and Vibration, 2020 This paper examines the effects of borehole arrangement on the failure process of coal-like materials based on its energy conversion and acoustic characteristics from the perspectives of energy, AE energy, AE spectrum, and frequency band.
Chuanbo Hao +3 more
doaj +1 more source
Experimental study and weighting analysis of factors influencing gas desorption
Frontiers in Earth Science, 2023 Gas is one of the necessary contributing factors for coal and gas outburst accidents, and the gas desorbed in coal is the energy carrier in the outburst process.
Xin He +6 more
doaj +1 more source
Near infrared lasing transitions in Ar, Kr, and Xe atoms pumped by a coaxial e-beam [PDF]
, 1988 Optimizations of gas composition and input energy were performed for gas mixtures containing a buffer gas and either Ar, Kr or Xe as the lasing gas. The total gas pressure was varied between 1 and 14 bar and the input energy from 0.03 to 0.7 J/cm3.
Peters, P.J.M. +2 more
core +4 more sources
Shock and Vibration, 2018 The research adopts the French ROCK600-50 three-axis experiment instrument and SH-II system to evaluate the acoustic emission (AE) peak of the rear axle of yellow sandstone by carrying out the confining pressure synchronous unloading experiment, and ...
Xiao Fukun, Liu Gang, Cheng Qianlong
doaj +1 more source
Study of the dynamics for gas accumulation in the annulus of production wells
Записки Горного института, 2021 Accumulation of associated petroleum gas in the annulus is one of the negative factors that impede the intensification of mechanized oil production. An increase in annular gas pressure causes growth of bottomhole pressure, a decrease in back pressure to ...
Kamil R. Urazakov +2 more
doaj +1 more source
Applied Sciences, 2023 The plastic zone of the surrounding rock of the borehole is a high-quality channel for gas flow. Studying the distribution form of the plastic zone in the surrounding rock of the boreholes and the characteristics of the extended connection network is ...
Chao Yuan +4 more
doaj +1 more source
Study on Multiparameter Precursory Information Identification of the Fracture of Yellow Sandstone
Advances in Civil Engineering, 2019 In order to explore the disaster caused by uncontrollable instability of coal and rock mass, a multiparameter fusion system is constructed to predict and predict disasters more accurately by identifying the mechanical and acoustic precursors of coal and ...
Xiao Fukun, Wang Houran, Liu Gang
doaj +1 more source
The Rod String Loads Variation during Short-Term Annular Gas Extraction
Energies, 2022 This paper highlights field studies to determine the nature of variations in the load on the sucker-rod string during short-term gas extraction from the wellbore annulus.
Alexander Vladimirovich Artyukhov +4 more
doaj +1 more source