Results 21 to 30 of about 30,599 (256)

Study on the Mechanism of Surrounding Rock Deformation and Its Control for Roof Cutting Retained Gob-Side Entry in Close-Distance Coal Seams Co-Mining

Energies, 2023
Sustainable development in coal mining requires a continuous and efficient method of coal extraction. Research shows that gob-side entries retained through roof cutting retained gob-side (RCGE) are vital for improving mining efficiency, enhancing coal ...
Yongkang Yang, Xuecong Xu, Chenlong Wang
doaj   +1 more source

Comparative mechanical properties of conventional concrete mixture and concrete incorporating mining tailings sands

Case Studies in Construction Materials, 2022
This work examines the mechanical properties of mining tailing sands in conventional concrete mixtures for structural applications. Mining is one of the most important factors for city development and, in some cases, represents the primary or only source
Natividad Garcia-Troncoso, Haci Baykara, Mauricio H. Cornejo, Ariel Riofrio, Marco Tinoco-Hidalgo, Jorge Flores-Rada   +5 more
doaj   +1 more source

Study on the Evolution Law of Overlying Strata Structure in Stope Based on “Space–Air–Ground” Integrated Monitoring Network and Discrete Element

Drones, 2023
The geological environmental damage caused by coal mining has become a hot issue in current research. Especially in the western mining area, the size of the mining working face is large, the mining intensity is high, while the surface movement and ...
Yuanhao Zhu, Yueguan Yan, Yanjun Zhang, Wanqiu Zhang, Jiayuan Kong, Anjin Dai   +5 more
doaj   +1 more source

Pre-split blasting design to reduce costs and improve safety in underground mining

Energy Reports, 2022
To control the overbreaking of an underground mining development gallery, the controlled blasting technique was proposed and as a result it was possible to reduce costs and improve the physical stability of the periphery of the opening, achieving greater
Alexander Pomasoncco-Najarro, Claudio Trujillo-Valerio, Luis Arauzo-Gallardo, Carlos Raymundo, Grimaldo Quispe, Francisco Dominguez   +5 more
doaj   +1 more source

Structural health monitoring by combining machine learning and dimensionality reduction techniques [PDF]

, 2019
Structural Health Monitoring is of major interest in many areas of structural mechanics. This paper presents a new approach based on the combination of dimensionality reduction and data-mining techniques able to differentiate damaged and undamaged ...
Chinesta, Francisco, Duval, Jean, Lopez, Elena, López Tomás, Elena, Abisset-Chavanne, Emmanuelle, Duval, Jean Louis, Chinesta Soria, Francisco, Louis Duval, Jean, Quaranta, Giacomo, Huerta, Antonio   +9 more
core   +1 more source

Heart rate variability and target organ damage in hypertensive patients [PDF]

, 2012
Background: We evaluated the association between linear standard Heart Rate Variability (HRV) measures and vascular, renal and cardiac target organ damage (TOD).
Melillo Paolo, Izzo, Raffaele, Nicola De Luca, Pecchia L., Paolo Melillo, Leandro Pecchia, Pecchia Leandro, De Luca N, De Luca Nicola, Pecchia, Leandro, Raffaele Izzo, Melillo, Paolo, Izzo Raffaele, De Luca, Nicola, Izzo R   +14 more
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Top-down control of herbivory by birds and bats in the canopy of temperate broad-leaved oaks (Quercus robur) [PDF]

, 2011
The intensive foraging of insectivorous birds and bats is well known to reduce the density of arboreal herbivorous arthropods but quantification of collateral leaf damage remains limited for temperate forest canopies.
Wells Konstans, Stefan M Böhm, Stefan M. Böhm, Bohm, Stefan, Wells, Konstans, Elisabeth K V Kalko, Kalko Elisabeth K. V., Konstans Wells, Böhm, Stefan M., Kalko, Elisabeth K.V., Elisabeth K. V. Kalko, Kalko, Elisabeth K. V., Böhm Stefan M., Wells, Konstans L.   +13 more
core   +1 more source

Evaluating Fractal Damage and Acoustic Emissions of Soft Rock–Coal Combinations in a Deep Mining Area

, 2023
Weakly cemented soft rock mines in the Ordos Basin are susceptible to mining disasters, including roof collapse and substantial deformation of surrounding rocks, during coal mining operations. Researching the damage characteristics of structures composed
Dong Wang, Hengjie Luan, Yujing Jiang, Bin Liang, Xiaoming Sun, Changsheng Wang, Lugen Chen, Ling Dong   +7 more
core   +1 more source

Exergy life cycle assessment indicators in colombian gold mining sector

, 2020
Thermodynamic methods, such as exergy analysis allow the assessment of environmental load (environmental impacts), by calculating the entropy generated or exergy destroyed due to the use of renewable and non-renewable resources along the entire ...
Hector I. Velasquez, Cano, Natalia A., Hasenstab, Christian, Velásquez, Héctor I., Natalia A Cano, Christian Hasenstab   +5 more
core   +1 more source

Seismic Mitigation Effect of Overlying Weakening Strata in Underground Coal Mines

Energies, 2023
Artificial construction of a weakening zone over the roadway is an essential method for preventing coal bursts and rock bursts caused by strong mining tremors.
Jiaxin Zhuang, Zonglong Mu, Xiufeng Zhang, Wu Cai, Anye Cao, Chunlong Jiang, Piotr Małkowski   +6 more
doaj   +1 more source