Results 71 to 80 of about 3,284,481 (140)

Deformation and air leakage mechanism of gob-side entry retaining and multiple collaborative prevention and control technology in thick coal seam

Meitan kexue jishu
In order to solve the problems of wall deformation mechanism of gob-side entry retaining, unclear air leakage flow field in goaf and poor gas control effect in thick coal seam, taking 20107 working face of Qincheng Coal Mine in Shanxi Province as the ...
Liang CHEN, Zhiheng CHENG, Hongbing WANG, Xin LUO, Zhenwei XU, Yanjun DONG, Wenchen LI, Peng WANG, Hongyang YU   +8 more
doaj   +1 more source

Study on Roof‐Control Technology for Gob‐Side Entry Retaining Under Composite Roofs

Energy Science &Engineering, EarlyView.
This study develops a roof‐control technology system for gob‐side entry retaining under composite roofs. By integrating field measurements, theoretical analysis, and numerical simulation, it reveals the spatiotemporal evolution of the plastic zone and proposes a targeted support method, providing theoretical and practical guidance for safe and ...
Dong Li, Yujiang Zhang, Yunlou Du, Haodong Zheng, Baoji Yang   +4 more
wiley   +1 more source

Mechanical behavior of the lateral gangue-retaining structure and roof cutting regulation in fully gob-side entry driving in a steep coal seam

Geomechanics and Geophysics for Geo-Energy and Geo-Resources
Fully gob-side entry driving refers to the excavation of a roadway along the edge of the gob after the completion of mining in the adjacent panel. Since no coal pillar remains between the full gob-side entry side and the gob, the reliability of the ...
Meng Wang, Yu Han, Ningkang Meng, Yalong Xu, Zhen Wang, Ruifu Yuan, Huaizhen Li, Qingyun Xu, Chao Wu   +8 more
doaj   +1 more source

Study on comprehensive evaluation of surrounding rock stability grade and repair control technology of gob-side entry retaining

矿业科学学报, 2017
In order to solve the multiplexing problem of gob-side entry retaining, the analytic hierarchy process(AHP) and the matter-element evaluation were applied to establish a multi-hierarchy and multi-index comprehensive evaluation model of surrounding rock ...
Zhao Yongqiang, He Fulian, Xie Fuxing, Wu Jingke, Liu Bingquan   +4 more
doaj   +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

Study of Gob-Side Entry Retaining Technology with Roof Cutting under Upper Roadway Condition

, 2021
Gob-side entry retaining technology with roof cutting (GERRC) has been widely used in flat and near-flat coal seam conditions, but its application under inclined coal seam is still very deficient.
Manchao He, Enze Zhen, Xingen Ma, Jianfeng Li, Gang He, Xuewei Sun   +5 more
core   +1 more source

From Trapped to Resilient Mountains: Diversified Coupling Pathways Linking Land Use Transition and Rural Revitalization for Mountain Sustainable Development

Land Degradation &Development, EarlyView.
ABSTRACT The synergistic interplay among land use transition, rural revitalization, and sustainable development is critical for harmonizing human‐land‐economic systems. Understanding their diverse coupling pathways is key to resolving human‐land conflicts and advancing sustainable rural development in mountainous regions. However, existing research has
Luanyu Zhou, Yangbing Li, Yuluan Zhao, Guangjie Luo, Linyu Yang, Yuxuan Xie, Xiang Wu, Xue Ren, Yiyi Zhang, Juan Huang, Kunyan Rao   +10 more
wiley   +1 more source

Pressure Relief Mechanism of Directional Hydraulic Fracturing for Gob-Side Entry Retaining and Its Application

, 2021
In order to make clear the pressure relief mechanism and application effect of directional hydraulic fracturing for gob-side entry retaining, the directional hydraulic fracturing was carried out by 400 m in haulage gateway remaining along the goaf in ...
Zhang Xiao, Kang Hongpu
core   +1 more source

From Planar to 3D Nanophotonic Lenses: Advancing Design, Fabrication, and Applications

Laser &Photonics Reviews, EarlyView.
Three‐dimensional nanophotonic lenses are enabled by an integrated workflow that links design parameterization, full‐wave electromagnetic simulation, computational optimization, and freeform fabrication. This Review summarizes how these tools expand optical design freedom beyond a single patterned plane by enriching the local meta‐atom response and ...
Wei Zhu, Lyudmila V. Goncharova, Eric Johlin   +2 more
wiley   +1 more source

Boronic Acid Inhibitors of β‐Lactamases: A Promising Strategy Against Antimicrobial Resistance

Medicinal Research Reviews, EarlyView.
ABSTRACT The rise of antimicrobial resistance (AMR) poses a critical threat to global health, mostly due to the proliferation of β‐lactamases, a class of enzymes responsible for the inactivation of β‐lactam antibiotics. Among the most promising strategies to restore β‐lactam efficacy is the use of β‐lactamase inhibitors (BLIs), with boronic acid ...
Nicolò Santi, Federico Corsini, Robert A. Bonomo, Emilia Caselli, Fabio Prati   +4 more
wiley   +1 more source