Results 71 to 80 of about 4,107 (241)

Study on Roof Breakage-Induced Roadway Coal Burst in an Extrathick Steeply Inclined Coal Seam

Shock and Vibration, 2019
In view of the coal burst induced by roof breakage in the steeply inclined coal seam (SICS) roadway and its mechanism, a mechanical model was established to investigate the distribution of dynamic and static stresses in the coal seam before and after the
Sheng-chuan Wang, Lin-ming Dou, Zong-long Mu, Jin-rong Cao, Xu-wei Li   +4 more
doaj   +1 more source

Exponentially‐constrained Gaussian mixture model for quantifying vertical development of water‐conducting fracture zones in lithologically stratified mining roofs

Deep Underground Science and Engineering, EarlyView.
This study proposes an exponentially‐constrained Gaussian mixture model (EcGMM) to quantify vertical fracture heterogeneity in stratified roof strata. The model integrates a piecewise exponential decay term capturing global stress dissipation with Gaussian components representing localized fracture intensification at lithological interfaces.
Huiqing Yuan, Zhimin Xu, Weixiao Chen, Chenghang Zhang, Shijie Xiong, Yajun Sun   +5 more
wiley   +1 more source

Dental development in the tropical gar (Atractosteus tropicus) and the evolution of vertebrate dentitions

Developmental Dynamics, EarlyView.
Abstract Background Dentitions have diversified enormously during vertebrate evolution, involving reductions, modifications, or allocations to prey seizing and processing regions. A combination of ancient and novel features related to dental and oropharyngeal apparatuses is found in extant lineages of non‐teleost fishes, such as the gars.
Anna Pospisilova, Jan Stundl, Lenin Arias‐Rodriguez, Robert Cerny, Vladimír Soukup   +4 more
wiley   +1 more source

Instability characteristics and stress-oriented fracturing mechanism of composite thick-hard roof in shallow stope

Abstract Composite thick-hard roof(CTHR) is characterized by substantial thickness, high mechanical strength, excellent load-bearing capacity, and remarkable elastic energy storage potential. Its sudden collapse tends to induce rock bursts due to the abrupt release of accumulated elastic energy.
Xiaowu Zhang, Yue Cao, Weiyong Lu, Yaohui Sun, Lei Shi, Zhijun Xu, Lianhai Tai   +6 more
openaire   +1 more source

Zebrafish ventral gastrula fate map reveals neural crest progenitor domain

Developmental Dynamics, EarlyView.
Abstract Background Fate maps relate progenitor cell positions to later fates and locations of their progeny, revealing early embryonic organization. Previous zebrafish fate maps identified the origin of germ layers and derivative cell fates, but ventral gastrula progenitor domains were not fully resolved. In particular, the neural crest, a multipotent
Elaine E. Kushkowski, Victoria E. Prince
wiley   +1 more source

Simulation Study on Energy Release and Weakening Effects of Pre-Fracturing in Hydraulic Fracturing of Thick Hard Roof

Applied Sciences
In this study, the thick, hard roof group of the 20103 working face in the Dahaize Coal Mine is used as the research object. UDEC discrete element simulations were conducted to examine fracture-induced energy release characteristics under unweakened conditions and single-layer hydraulic fracturing at different burial depths.
Xiaolong Shi, Bin Zhang, Zhu Li, Bo Wang, Jianing Yang, Jinlin Yao   +5 more
openaire   +1 more source

New‐Generation Integrated Devices: Multiple‐Energy Utilization and Integration Systems Based on Perovskite Photovoltaics

EcoEnergy, EarlyView.
This review highlights emerging integrated energy systems based on perovskite photovoltaics, including PSC–thermoelectric, photovoltaic–electrochemical, self‐charging, and building‐integrated architectures. By coupling multiple energy conversion and storage pathways, these multifunctional platforms enable enhanced solar utilization, improved stability,
Yihuai Huang, Wenguang Zhang, Yuchen Xiong, Zijun Yi, Changkai Huang, Qinghui Jiang, Abdul Basit, Guibin Shen, Yubo Luo, Xin Li, Junyou Yang   +10 more
wiley   +1 more source

Strong mine pressure appearing mechanism and control at deep buried working face with large mining height

Meitan kexue jishu
During the mining of the adjacent working face, the strong mine pressure caused by the hard thick roof has obvious zoning characteristics due to the mining of the previous deeply buried large mining height working face.
Zhaoyuan LEI, Maoping ZHAO, Tuanjie LI, Feng LI, Lei LI   +4 more
doaj   +1 more source

Nested Carbon Governance in Southeast Asia: Towards Just Nature‐Based Solutions?

Environmental Policy and Governance, EarlyView.
ABSTRACT Nature‐based solutions (NbS) have gained prominence as an integrated approach to addressing climate change and biodiversity loss while supporting sustainable development. Yet, their implementation across Southeast Asia remains fragmented and often contested.
Helena Varkkey, Michelle Ann Miller, David Taylor   +2 more
wiley   +1 more source

Study on fracture law and energy evolution characteristics of inclined thick-hard roof

Meikuang Anquan
Fracture of the inclined thick-hard roof structure is the direct cause of dynamic disasters such as rock burst. To clarify the fracture law and energy evolution characteristics of the inclined thick-hard roof, taking the 1303 working face with inclined ...
Jinliang ZHANG, Weiping SHI, Shouqing YAN, Guohui WANG, Lei HOU, Jie GUO, Qiongxiang TIAN, Chenshuo ZHANG   +7 more
doaj   +1 more source