Results 71 to 80 of about 16,115 (235)

Применение бесконсольных крепей механизированных комплексов при отработке пологих пластов [PDF]

, 2016
Purpose. Substantiation of applying additional load-bearing structure of powered support near the face onto the bench formed within the seam by the cutter-loader actuating element, which allows to increase efficiency of coal winning.
Busylo, V, Savelieva, T, Serdyuk, V
core   +1 more source

Gas concentration prediction model for fully mechanized coal mining face

Gong-kuang zidonghua, 2018
In view of problems of gas concentration prediction method based on least squares support vector machine (LS-SVM) such as easy to fall into local optimal solution, low search efficiency and easy to occur premature convergence during parameter optimization process, a gas concentration prediction model based on ACO-LS-SVM was proposed.
LI Huan, JIA Jia, YANG Xiuyu, SONG Chunru   +3 more
openaire   +1 more source

From wild to tamed: Reimagining novel crops through omics and local plant diversity

PLANTS, PEOPLE, PLANET, EarlyView.
The global food system faces growing pressure from climate change, biodiversity loss, and rising nutritional demands. Agriculture has increased yields but reduced crop diversity, flavor, and nutritional quality, leaving societies vulnerable and dependent on a narrow set of staple species.
Alexandra Sanfeliu Meliá, Pablo D. Cárdenas   +1 more
wiley   +1 more source

Illegal Gold Mining in the Brazilian Amazon: Environmental Degradation in Yanomami Indigenous Lands, and Regulatory Failures

Sustainable Development, EarlyView.
ABSTRACT Illegal gold mining has emerged as a major sustainability threat in the Amazon, eroding Indigenous rights, forest integrity, and climate mitigation efforts. This study examines how international market incentives relate to the expansion of illegal mining and associated deforestation within the Yanomami Indigenous Territory (YIT) from 2008 to ...
Shirléia Lago Santos, Ana Claudia de Araujo Moxotó, Jurandir Moura Dutra   +2 more
wiley   +1 more source

Numerical Simulation Study on Law of Dispersive Pollution of Dust in Fully Mechanized Mining Face

Meikuang Anquan, 2020
Aiming at the problem of dust movement in the fully mechanized mining work, a 3D model of the fully mechanized mining face was established based on the gas-solid two-phase flow theory based on the 3604 face in Chenbanzhuang Coal Mine.
KONG Yang, PANG Haosheng, SONG Shuzheng, MENG Qunzhi
doaj   +1 more source

Movement Laws of Overlying Strata above a Fully Mechanized Coal Mining Face Backfilled with Gangue: A Case Study in Jiulishan Coal Mine in Henan Province, China

Advances in Civil Engineering, 2021
The aim of this study is to obtain movement laws of overlying strata above a fully mechanized coal mining face backfilled with gangue and solve the problem of surface subsidence during coal mining.
Zhengkai Yang, Zhiheng Cheng, Zhenhua Li, Chunyuan Li, Lei Wang, Shuaifeng Yin, Jinhu Zhang   +6 more
doaj   +1 more source

Social Sustainability in Circular Bioeconomy Business Models: Insights From Argentina

Sustainable Development, EarlyView.
ABSTRACT Research on circular bioeconomy business models (CBEBM) has largely prioritised environmental and economic aspects, leaving out the social pillar. To address this gap, this paper analyses to what extent and in what ways social sustainability is integrated into CBEBM, based on 12 cases from northern Argentina, a region with high potential for ...
Celina N. Amato, Mónica Buraschi, Karen M. Siegel   +2 more
wiley   +1 more source

Technology and The North American Forest [PDF]

, 1992
Cet propose une revue de la littérature concernant l’adoption en Amérique du nord, au cours des 19e et 20e siècle, de technologies forestières européennes. On discutera surtout du traitement des billes de bois, des technologies touchant les moulin à scie
Brown, Marian K.
core   +1 more source

Beyond Manoeuvre Theory for European Defence

Global Policy, EarlyView.
ABSTRACT This article contributes to the debate about European defence in the light of the Russo‐Ukraine war and growing doubts about US commitment to Europe. It argues that Europeans need to fundamentally relearn the ability to imagine military strategy from a European viewpoint.
Lukas Mengelkamp, Sam Vincent
wiley   +1 more source

Overall requirements for an advanced underground coal extraction system [PDF]

, 1980
Underground mining systems suitable for coal seams expoitable in the year 2000 are examined with particular relevance to the resources of Central Appalachia. Requirements for such systems may be summarized as follows: (1) production cost; (2)miner safety;
Goldsmith, M., Lavin, M. L.
core   +2 more sources