Results 81 to 90 of about 783,769 (161)

Mechanisms behind the impacts of CO2 concentration on microbial methanogenesis in coal seams

Meitian dizhi yu kantan
Background Coal seams exhibit the extensive distribution of a variety of indigenous functional microorganisms. Among these, some archaea enable methane metabolism using CO2 as a substrate, providing the potential for the biological CO2 storage and ...
Junyu WANG, Bingjun LIU, Xiangqing JIANG, Ruifeng CHEN, Sheng XUE, Wanlong ZHOU, Yundu YANG   +6 more
doaj   +1 more source

Rubber content governs strength, energy dissipation, and failure transition in cemented tailings backfill

Materials & Design
Cemented tailings backfill is widely used to maintain the stability of underground openings, yet its brittleness limits deformation tolerance and energy dissipation.
Changcheng Wang, Ke Yang, Tong Wang, Yongqiang Hou, Bo Ren, Qiang Fu   +5 more
doaj   +1 more source

Role of mining in national economies [PDF]

, 2016
Mining can play a vital role on the sustainable development of some of the world’s poorest countries, yet many countries that are most economically dependent on mining would benefit from improved governance, according to a new report published by the ...
International Council on Mining and Metals
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Verifiable control of a swarm of unmanned aerial vehicles [PDF]

, 2009
This article considers the distributed control of a swarm of unmanned aerial vehicles (UAVs) investigating autonomous pattern formation and reconfigurability.
Bennet, D. J., McInnes, C.R.
core   +1 more source

Instability Risk of Submarine Hydrate-Bearing Slopes Under Thermal Disturbances

Journal of Marine Science and Engineering
Thermal disturbance can destabilize submarine hydrate-bearing sediments by reducing hydrate stability, promoting dissociation, weakening hydrate-derived cementation, and increasing excess pore pressure.
Xiaolong Song, Jiuhui Cheng, Bin Zhu, Hao Zhang   +3 more
doaj   +1 more source

Experimental study on evolution characteristics of coal permeability under triaxial stress conditions

Meikuang Anquan
Mining stress disturbance causes dynamic evolution of the pore and fracture structures of disturbed coal under complex loading conditions, leading to nonlinear changes in permeability, which significantly affects gas drainage efficiency.
Han GAO, Xiaoyu CHENG, Aitao ZHOU, Yuxuan ZHU, Haiqing SHUANG   +4 more
doaj   +1 more source

Fracture characteristics and process zone evolution in sandstone under freeze-thaw cycles

Research in Cold and Arid Regions
This study investigates the fracture characteristics and the fracture process zone (FPZ) of mode Ⅰ fracture in sandstone, aiming to analyze the propagation behaviors of mode Ⅰ crack under different freeze-thaw cycles.
MeiLu Yu, ZhongWen Wang, Ding Ma, JinJin Ge, YaTing Wang, HaoTian Xie, GenShui Wu, YaoYao Meng   +7 more
doaj   +1 more source

Vision based strategies for implementing Sense and Avoid capabilities onboard Unmanned Aerial Systems [PDF]

, 2011
Current research activities are worked out to develop fully autonomous unmanned platform systems, provided with Sense and Avoid technologies in order to achieve the access to the National Airspace System (NAS), flying with manned airplanes.
Forlenza, Lidia
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Coal mining practice in district VIII : (Danville) [PDF]

, 1914
Made available in DSpace on 2013-06-24T14:49:05Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) coalminingpracti02andr.pdf: 4815557 bytes, checksum: 8779f6c3c5b7fc04b8ae56f92116b995 (MD5) Previous ...
Andros, S.O.
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Idea of whole design of unmanned fully-mechanized coal mining face and its implementation method

Gong-kuang zidonghua, 2013
Unmanned or lee-manned fully-mechanized coal mining face is a core topic about coal mine safety. A view was pointed out that automatic coal mining should be pondered on from the whole fully-mechanized system, and fully-mechanized equipments should be ...
FU Guo-jun, YANG Ming-liang, XU Tai-shan
doaj