Results 21 to 30 of about 5,939,968 (240)
ESTIMATION OF A RESERVOIR COVERAGE BY THE DEVELOPMENT SYSTEM USING THE DRAINING WELL RADIUS
Известия Томского политехнического университета: Инжиниринг георесурсов, 2020 Relevance of the research.In hydrodynamic simulators, fluid filtration is described using the laws of mass conservation, as a result of which it may turn out that a significant part of the development object is involved in the drainage process.
Vladimir V. Poplygin +1 more
doaj +1 more source
Advances in Civil Engineering, 2021 Gas disasters have been always a major hidden danger that affects mining safety in coal mines. Gas drainage by drilling is the fundamental method of gas control in coal mines.
Zongyong Wei +5 more
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Influence of ice crystal shape on retrieval of cirrus optical thickness and effective radius: A case study [PDF]
, 2009 Airborne measurements of spectral upwelling radiances (350â  2200 nm) reflected by cirrus using the Spectral Modular Airborne Radiation measurement sysTem (SMART)-Albedometer were made over land and water surfaces.
Minikin, Andreas +7 more
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Norm and Numerical Radius Inequalities for a Product of Two Linear Operators in Hilbert Spaces [PDF]
, 2006 The main aim of the present paper is to establish some norm and numerical radius inequalities for the composite operator BA under suitable assumptions for the transform Cα ,β (T) := (T∗ −α I)(β I−T) , where α ,β ∈ C and T ∈ B(H), of the operators ...
S. S. Dragomir +2 more
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Effect of hydraulic radius on long-term drainage capacity of geosynthetics drains
Geotextiles and Geomembranes, 2004 The results of the long-term drainage capacity of four types of prefabricated vertical drains (PVDs) and three types of prefabricated horizontal drains (PHDs), and as well of the transmissivity of a dual function (reinforcement and drainage) geotextile (DFG) are presented. PVD, PHD and DFG are together called geosynthetics drains in this study.
Chai, Jin-Chun +2 more
openaire +1 more source
Study on effective extraction radius of bedding borehole under the impact of normal fault
Gong-kuang zidonghua, 2022 The reasonable effective extraction radius of borehole is the key to ensure gas extraction effect. However, the research of effective extraction radius mainly focuses on the measurement method of effective extraction radius of borehole, and there is a ...
JIANG Mingquan +4 more
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Energy Science & Engineering, 2023 Aiming at the application of hydraulic punching technology in soft, low permeability, and high gas coal seams in Changping Coal Mine, there are problems such as large workload, poor permeability enhancement effect, and the formation of “blank zones” in ...
Rui Min +4 more
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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
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Engineering Applications of Computational Fluid Mechanics, 2022 A major drainage systemwhich uses urban roadways as flood passages during extreme storm events has been proven to be effective and low-cost. However, to date, the amount of flow diverted at a bifurcating road crossing still could not be accurately ...
Wang Feng +6 more
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Study on determination of borehole drainage radius by gas content method [PDF]
, 2017 In order to determine the radius of borehole gas drainage, using five kinds of gas content under different conditions corresponding to the extraction rate were compared according to different drainage objectives, determine the need for gas drainage ...
Zhang, Yongjiang +5 more
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