Results 11 to 20 of about 73,832 (78)

Longwall surface subsidence control by technology of isolated overburden grout injection

open access: yesInternational Journal of Mining Science and Technology, 2017
Surface subsidence is a typical ground movement due to longwall mining, which causes a series of environmental problems and hazards. In China, intensive coal extractions are commonly operated under dense-populated coalfields, which exacerbates the ...
Dayang Xuan, Jialin Xu
doaj   +1 more source

Mechanical Properties of In-Situ Synthesis of Ti-Ti3Al Metal Composite Prepared by Selective Laser Melting

open access: yesMetals, 2019
Titanium composite strengthened by Ti3Al precipitations is considered to be one of the excellent materials that is widely used in engineering. In this work, we prepared a kind of Ti-Ti3Al metallic composite by in-situ synthesis technology during the SLM (
Yize Li   +7 more
doaj   +1 more source

Electronic and ionic conductivity studies on microwave synthesized glasses containing transition metal ions

open access: yesJournal of Materials Research and Technology, 2017
Glasses in the system xV2O5·20Li2O·(80 − x) [0.6B2O3:0.4ZnO] (where 10 ≤ x ≤ 50) have been prepared by a simple microwave method. Microwave synthesis of materials offers advantages of efficient transformation of energy throughout the volume in an ...
Basareddy Sujatha   +3 more
doaj   +1 more source

Analysis of gateroad stability at two longwall mines based on field monitoring results and numerical model analysis

open access: yesInternational Journal of Mining Science and Technology, 2019
Coal mine longwall gateroads are subject to changing loading conditions induced by the advancing longwall face. The ground response and support requirements are closely related to the magnitude and orientation of the stress changes, as well as the local ...
Gabriel S. Esterhuizen   +4 more
doaj   +1 more source

Some remarks on the dynamical conformity of rock joints

open access: yesInternational Journal of Mining Science and Technology, 2018
A recently developed computerized method for assessing the rock joint coefficients is discussed. The performances of formerly introduced relative similarity indicators, along with the correlation coefficient, are subjected to critical analysis.
T. Ficker
doaj   +1 more source

Superposition model for analyzing the dynamic ground subsidence in mining area of thick loose layer

open access: yesInternational Journal of Mining Science and Technology, 2018
The dynamic ground subsidence due to underground mining is a complicated time-dependent and rate-dependent process. Based on the theory of rock rheology and probability integral method, this study developed the superposition model for the prediction and ...
Defeng Hou   +3 more
doaj   +1 more source

طراحی و شبیه‌سازی دیوار تقویت شده با سپر بتنی انبار مواد منفجره در برابر بارگذاری انفجار [PDF]

open access: yesAnalytical and Numerical Methods in Mining Engineering, 2020
حملات تروریستی با آسیب رساندن به سازه­ها و زیرساخت­های یک کشور می‌تواند صدمات مالی و جانی زیادی را نیز به بار آورد؛ بنابراین توجه به موضوع پدافند غیرعامل در ساخت سازه­ها و همچنین طراحی و کنترل این سازه­ها باید مدنظر قرار گیرد. یکی از مهم‌ترین زیرساخت­های
امیررضا خدابخشی   +1 more
doaj   +1 more source

Analysis on the multi-phase flow characterization in cross-measure borehole during coal hydraulic slotting

open access: yesInternational Journal of Mining Science and Technology, 2018
Hydraulic slotting in a gas drainage borehole is an effective method of enhancing gas drainage performance. However, it frequently occurs that a large amount of slotting products (mainly the coal slurry and gas) intensely spurt out of the borehole during
Chunshan Zheng   +5 more
doaj   +1 more source

Pattern Deep Region Learning for Crack Detection in Thermography Diagnosis System

open access: yesMetals, 2018
Eddy Current Pulsed Thermography is a crucial non-destructive testing technology which has a rapidly increasing range of applications for crack detection on metals.
Jue Hu   +7 more
doaj   +1 more source

Įvairialyčiai lantano ir mangano oksido ir multiferoinio bismuto ferito heterodariniai

open access: yesMedžiagotyra, 2011
Pastaruoju metu naujų elektronikos prietaisų gamyboje buvo pasiekta didelė pažanga auginant, tyrinėjant ir pritaikant plonasluoksnes struktūras, sudarytas iš įvairių daugiakomponenčių funkcinių oksidų.
Bonifacas VENGALIS   +1 more
doaj   +1 more source

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