Results 81 to 90 of about 4,472,603 (224)

Research on construction of intelligent fully mechanized mining face in Wangjiata Coal Mine

Gong-kuang zidonghua, 2020
Taking the 2S103 intelligent fully mechanized mining face of Wangjiata Coal Mine as an example, the specific implementation plan and application effect of intelligent fully mechanized mining face are analyzed, and the existing technical problems are summarized.
XING Xudong, ZHANG Yongjie, DIAO Zongxian, LU Jiabin, ZHENG Xiangqi, WANG Bo   +5 more
openaire   +1 more source

Advances in vital‐sign prediction and early‐warning models for underground coal mine workers integrating environmental factors

Deep Underground Science and Engineering, EarlyView.
This review synthesizes advances in predicting miners' vital signs by integrating environmental monitoring (dust, temperature, and gas) with physiological data. It highlights multi‐source data fusion techniques and early‐warning models for enhanced occupational safety in underground coal mines.
Junji Zhu, Dawei Cui, Yingjie Liu, Yuntao Liang, Yue Zhang   +4 more
wiley   +1 more source

Carbon emission assessment of tunnel infrastructures: From construction to operation

Deep Underground Science and Engineering, EarlyView.
This study develops a lifecycle carbon accounting framework for tunnel infrastructures, covering design, construction, operation, maintenance, and dismantling. Applied to a subsea tunnel case, the framework reveals the carbon emission distribution among four typical tunnel types and highlights potential carbon offset methods for low‐carbon tunnel ...
Luyuan Long, Wout Broere, Xuehui Zhang, Tian Xia, Richard de Nijs   +4 more
wiley   +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

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

Fracture Development Mechanism of Water‐Isolating Soil Layers During Downward Mining of Shallow‐Buried Coal Seam Groups

Energy Science &Engineering, EarlyView.
This study systematically investigates the fracture development mechanisms of water‐isolating soil layers under the coupled effects of repeated mining and groundwater seepage during the downward mining of shallow‐buried coal seams. The findings provide a theoretical basis for evaluating stratum stability and preventing roof water inrush.
Tao Yang, Shuqi Zhang, Jie Zhang, Haifei Lin, Dong Liu, Hui Liu, Yiming Zhang, Jianping Sun   +7 more
wiley   +1 more source

Discussions on Some Security Mining Problems of Fully-Mechanized Top Coal Mining in “Three Soft” Large Inclined Angle Working Face [PDF]

, 2011
This paper studies insecure factors of fully-mechanized top coal mining in “three soft” large inclined angle working face, which have impacted the normal generation badly, including rib spalling, roof fall and equipment slide, etc.
Yanli, Zhu, Dongming, Guo, Xianlei, Zhu, Guihe, Li, Renshu, Yang   +4 more
core   +1 more source

Co‐Evolution of Humans, AI, and Robotics in Autonomous Materials Manufacturing

National Materials, EarlyView.
ABSTRACT Materials manufacturing has entered into a new era with the rapid development of technologies. The convergence of artificial intelligence (AI) and robotics technologies is transforming materials manufacturing from a traditional human‐centered practice into a human, AI, and robotics co‐evolution paradigm.
Yixuan Zhao, Wenlong Li, Xiaodong Chen
wiley   +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