Results 51 to 60 of about 370,321 (357)

Grouting theories and technologies for the reinforcement of fractured rocks surrounding deep roadways

Deep Underground Science and Engineering, 2023
Grouting is an effective method to improve the integrity and stability of fractured rocks that surround deep roadways. After years of research and practice, various theories and a complete set of grouting technologies for deep roadways with fractured ...
Hongpu Kang, Wenzhou Li, Fuqiang Gao, Jianwei Yang   +3 more
doaj   +1 more source

Study on the Fragmentation Characteristics and Dust Generation Mechanism of Coal Cutting by Pick

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT During underground excavation, coal dust generation threatens miners' health and damages ecosystems. Its generation is directly influenced by cutting pick performance and inherent coal properties. This study investigates the effects of coal properties and cutting parameters on coal fragmentation characteristics from a mesoscopic perspective ...
Shihang Li, Delong Li, Bohan Gao, Xingyue Chen, Hao Jin, Shuda Hu, Qiang Zhang, Wuping Peng, Ping Li, Jianping Li, Xuegang Wang   +10 more
wiley   +1 more source

Selection of an Optimum Anchoring Method of Composite Rock Stratum Based on Anchor Bolt Support Prestress Field

Applied Sciences
In order to make the anchor bolt support prestress field fully diffuse in the composite rock stratum, improve the overall bearing capacity of surrounding rock, and give full play to the role of active support of the anchor bolt, a self-made 1:1-scale ...
Yiqun Zhou, Jianwei Yang, Chenyang Zhang, Dingyi Li, Bin Hu   +4 more
doaj   +1 more source

Failure Characteristics and Deformation Control Methods of the Bottom Drum of Roadways during Repeated Mining of Multiple Coal Seams

Geofluids, 2022
As the problems of serious bottom drum and roadway broken surrounding rock are influenced by repeated mining in multiple coal seams, the factors affecting the surrounding rock deformation of a +980 m roadway in Faer coal mine by analyzing the rock ...
Changzheng Zhao, Shenggen Cao, Shuyu Du, Chiyuan Che, Xingyao Wang   +4 more
doaj   +1 more source

Evaluation of Zinc Borate and Melamine Polyphosphate Synergy on the Rheological, Thermal, Mechanical, Dimensional, and Flame Retardant Performance of rLLDPE/CaCO3 Composites for Pipes Applications

Journal of Applied Polymer Science, EarlyView.
A synergistic flame retardant containing melamine polyphosphate and zinc borate was prepared and applied to provide rLLDPE/CaCO3 composites with superior flame retardancy. ABSTRACT The use of recycled thermoplastics is crucial for addressing environmental challenges such as waste management and sustainability.
Antonio Benjamim Mapossa, Erick Gabriel Ribeiro dos Anjos, Uttandaraman Sundararaj   +2 more
wiley   +1 more source

Evolution Mechanism of Water-Conducting Fissures in Overlying Rock Strata with Karst Caves under the Influence of Coal Mining [PDF]

, 2022
Wenqiang Wang, Zhenhua Li, Jie Xu, Yue Wang, Fan Xuan, Songtao Li   +5 more
openalex   +1 more source

New possibilities of calculating the volumes of extracted masses in the surface mining of brown coal [PDF]

, 2017
The companies engaged in brown coal mining are looking for ways of managing the mining process as efficiently as possible. The principal mining technology used for brown coal mining in our country, but also in Germany and Poland, are wheel excavators ...
Gibesová, Beáta, Kapica, Roman, Mudruňka, Jaroslav, Vrublová, Dana   +3 more
core  

Study of quasi-distributed optical fiber methane sensors based on laser absorption spectrometry [PDF]

, 2019
The coal industry plays an important role in the economic development of China. With the increase of coal mining year by year, coal mine accidents caused by gas explosion also occur frequently, which poses a serious threat to the life safety of ...
Chang, J., Gong, W., Grattan, K. T. V., Li, Y., Liu, T., Wang, Z., Wei, Y., Zhang, T.   +7 more
core   +1 more source

Preset-Time Tracking Control for Nonlinear Cyber-Physical Systems Against Cyber Attacks

IEEE Access
In this article, we developed a novel preset-time adaptive fuzzy tracking control strategy to dispose of the preset-time tracking control issue for a family of nonlinear cyber-physical systems (CPSs), which are subject to spiteful actuator attacks ...
Zhiliang Chen, Wei Zhang, Ting Yu, Yijie Liu, Wang Ren, Kaixiong Zhu, Shilin Li   +6 more
doaj   +1 more source

Exposure to occupational inhalants and the risk of developing rheumatoid arthritis: A systematic review and meta‐analysis

Arthritis &Rheumatology, Accepted Article.
Objective: Rheumatoid arthritis (RA) is a chronic autoimmune disease characterized by joint pain, swelling, and stiffness. While smoking is a well‐established risk factor for RA, the role of occupational inhalants in RA development is less well recognized.
Qianwen Liu, Xin Song, Emily Mauro, Yuan Jiang, Klementy Shchetynsky, PLars Klareskog, Lars Alfredsson, Xia Jiang   +7 more
wiley   +1 more source