Results 61 to 70 of about 1,276 (260)

Mechanisms of Roadway Instability and Coupled Control Technology for Working Face Passing Through Fault Zones

Energy Science &Engineering, EarlyView.
This study mainly explores the instability characteristics of roadways near faults in the working face. Taking the 51104 transportation roadway of the 51104 working face in Shengxin Coal Mine as the main research object, through theoretical analysis, borehole inspection, numerical simulation and on‐site mine pressure observation, the instability ...
Shuaifeng Yin, Yitao Yan, En Wang, Xubo Zhao, Kanglei Han   +4 more
wiley   +1 more source

Optimization of Blasting‑Induced Roof Cutting Parameters in Key Stratum and Its Application in Gob‑Side Entry Retention Technology

Energy Science &Engineering, EarlyView.
This study addresses hard roof coal seam conditions by optimizing key stratum blasting‐cutting parameters through theoretical analysis, numerical simulation, and field tests. It proposes calculation methods for blast hole spacing and delay timing based on stress wave theory, controlling roadway deformation within 35 mm, thereby enhancing resource ...
Qiong Liu, Duanxiang Fu, Hongbin Li
wiley   +1 more source

Numerical Simulation Study on Optimization of Horizontal Sublevel Top‐Coal Caving Mining Technique for Steeply Inclined Extra‐Thick Coal Seam

Energy Science &Engineering, EarlyView.
As the sublevel height increases, the top‐coal recovery amount gradually increases, but both the top‐coal recovery rate and the thickened top‐coal recovery rate show a downward trend, and the decline in the top‐coal recovery rate is gradually increasing. The comparison indicates that the optimal sublevel height is 20 m.
Hongsheng Tu, Dingyi Hao, Wenhong Xiao, Fuhao Jiang, Shikun Xu   +4 more
wiley   +1 more source

Tourist interest in illicit zone of ice caves

, 2018
Ledové sluje (Ice Caves) in the Podyjí National Park represents one of the most spectacular sites within the area. It consists of the large boulder field and several pseudokarst caverns on the north-western slope of the ridge that are very important from the ecological and geomorphological point of view.
Nováková, E. (Eva), Kuda, F. (František), Kubalíková, L. (Lucie)   +2 more
openaire   +3 more sources

Rapid Prediction for Overburden Caving Zone of Underground Excavations

Geotechnics
Underground coal gasification (UCG) is an emerging energy technology that involves the in situ conversion of coal into syngas through controlled combustion within a subsurface excavation. The geomechanical processes associated with UCG can lead to significant overburden caving and surface subsidence, posing risks to surface infrastructure and ...
Zihan Zhang, Chaoshui Xu, Zhao Feng Tian, Feng Xiong, John Centofonti   +4 more
openaire   +1 more source

Practice adoption in MNCS: A multi‐level interactionist model of trait activation

Global Strategy Journal, EarlyView.
Abstract Research Summary Sharing knowledge through organizational practices is an important source of advantage for multinational corporations (MNCs). While prior research on practice adoption by subsidiaries of MNCs has identified several individual and organizational factors, this study examines their interplay in the context of HQ‐mandated ...
Sven Kunisch, Ulrich Leicht‐Deobald, Tomi Laamanen, Adrian Schulte Steinberg, Björn Ambos   +4 more
wiley   +1 more source

Multi-field information fusion-based analysis of the macroscopic and mesoscopic damage evolution and location identification of caving and water-conducting fracture zones for mining overburden

Meitian dizhi yu kantan
ObjectiveFor the coal mining areas in the middle reaches of the Yellow River, there is an urgent need to determine the failure characteristics of the mining overburden and the spatial structural evolution of caving and water-conducting fracture zones in ...
Jiangbo WEI, Shuangming WANG, Lang LIU, Baoning WEI, Deyu CHONG, Zhizhen LIU, Dongkui LI, Dengdeng ZHUANG, Jing ZHOU   +8 more
doaj   +1 more source

Materials and Music: Selective Imperfection as a Generative Framework for Analysis, Creativity and Discovery

Interdisciplinary Materials, EarlyView.
Vibrations in matter, from spider webs to molecules, water to flames, share a grammar with music. We propose that creativity emerges when constraints force expansion beyond existing possibilities. Selective imperfection restores balance, enabling invention.
Markus J. Buehler
wiley   +1 more source

Study on the development characteristics of the water-conducting fissure zone in large-height and ultra-wide working faces at Sihe Coal Mine

河南理工大学学报. 自然科学版
ObjectivesTo investigate the development characteristics of the water-conducting fissure zone in large-height and ultra-wide working faces at Sihe Coal Mine， using the 6306 working face as the study subject.MethodsThe variation in apparent resistivity of
Wang Guoliang, Wang Fei, Wang Shuyong, Cheng Fengfei, Du Feng   +4 more
doaj   +1 more source

Total Immunoglobulin G Variation Through the Phenological Cycle of Migrant and Resident Lesser Long‐Nosed Bats (Leptonycteris yerbabuenae) in the Drylands of Mexico and Its Relationship With Bacterial Killing‐Ability of Plasma

Journal of Experimental Zoology Part A: Ecological and Integrative Physiology, EarlyView.
ABSTRACT Bats have unique immunological characteristics among vertebrates. Understanding how the immune system responds during the life cycle of bat populations is crucial for grasping how their defenses against infection vary during critical life events.
David Alfonso Rivera‐Ruiz, José Juan Flores‐Martínez, Carlos Rosales, Luisa I. Falcón, Marco Tulio Solano de la Cruz, Rodrigo A. Medellín, L. Gerardo Herrera M.   +6 more
wiley   +1 more source