Results 91 to 100 of about 35,277 (264)

Gaborlet‐guided sparse filtering: A novel intelligent method for lithology identification by vibration signals while drilling

Deep Underground Science and Engineering, EarlyView.
The flowchart illustrates rock specimen testing, vibration signal acquisition, and feature extraction with Gaborlet and sparse filtering for classification. Abstract Traditional lithology identification methods mainly rely on core sampling and well‐logging data.
Jian Hao, Danqi Zhang, Zhenqi Song, Jinrui Wang, Qi Wang, Heqing Liu   +5 more
wiley   +1 more source

Localization of Acoustic Emission Source in Rock Using SMIGWO Algorithm

International Journal of Coal Science & Technology
The Grey Wolf Optimization (GWO) algorithm is acknowledged as an effective method for rock acoustic emission localization. However, the conventional GWO algorithm encounters challenges related to solution accuracy and convergence speed.
Jiong Wei, Fuqiang Gao, Jinfu Lou, Lei Yang, Xiaoqing Wang   +4 more
doaj   +1 more source

Research and application practice of digital intelligent technology and complete set of equipment for efficient coalmining

Meitan xuebao
Summarizing the current development status of intelligent and digital technologies in the coal industry, analyzing the new situations and requirements for research and application of intelligent technologies and complete sets of equipment for efficient ...
Guofa WANG, Jinhu ZHANG, Huaiwei REN, Yibo DU, Desheng ZHANG, Ruyu YAN, Xiang YU   +6 more
doaj   +1 more source

Instability mechanism and failure characteristics of underground cavern in block system under the action of seismic waves

Deep Underground Science and Engineering, EarlyView.
Seismic waves with tensile stress, high amplitude, and low frequency are most likely to trigger block instability and sliding. Blocks with a single sliding surface are more prone to movement than those with multiple constraints, and roof‐positioned blocks are especially vulnerable to slide.
Xiao Wang, Jinxiao Liu, Gaoshuo Zhang, Wenxin Li, Changdi He   +4 more
wiley   +1 more source

Research and application of pressure relief technology for fracturing thick hard roof in super-high mining face

Meitan xuebao
Aiming at the problems of super-large mining space, strong ore pressure and ultra-high coal wall stability control faced by full-mechanized mining face with ultra-large mining height and thick hard roof, this paper takes the 122104 working face of ...
Yajun LEI, Yanjun FENG, Hongpu KANG, Futang ZHAO, Xiaoguang SHANG, Rui WANG, Peng WANG, Zhen ZHANG, Jianchao REN, Kaikai ZHAO, Yangfa ZHENG, Xiaogang LIU   +11 more
doaj   +1 more source

Modeling and experimental validation of bolt–grout bond–slip behavior for deep underground excavation support

Deep Underground Science and Engineering, EarlyView.
A novel shear‐lag model, validated by pull‐out tests, incorporates a constant bond stress stage to predict the complete load–displacement response of grouted rock bolts, providing a new tool for optimizing anchorage length and material toughness in deep underground engineering. Abstract The stability of rock masses in deep underground excavations, such
Wenhui Bian, Xiaohui He, Kexue Wang, Yufei Wu, Guoxin Wang, Shaochen Zhang, Jun Yang   +6 more
wiley   +1 more source

Fracture evolution of a thick soft protection layer and the water inrush mechanism in overburden under longwall mining

Deep Underground Science and Engineering, EarlyView.
Through shear–tensile creep tests and viscoelastic modeling, the fracture evolution of thick soft protective layers is clarified. Results show thickness‐dependent rheological failure modes that govern four types of roof water inrush, providing a mechanism‐based framework for hazard prediction and control. Abstract In the Jurassic coal‐bearing strata of
Mengnan Liu, Wei Qiao, Xianggang Cheng, Xiangsheng Meng, Peichao Feng   +4 more
wiley   +1 more source

Coal roadway rapid driving technology and equipment with integrated drilling and anchoring and its application

Meitan xuebao
This paper analyzes the current situation and existing problems of coal roadway driving technologies and equipment, introduces the new mode, technology, equipment of coal roadway rapid driving with integrated drilling and anchoring and its underground ...
Hongpu KANG, Pengfei JIANG, Ziyue WANG, Xiaofeng ZHANG, Chang LIU, Chao LUO, Yaozhong WEI, Jichang GUO, Zhiliang CHEN, Rui WANG, Cundi HAN, Faquan LI, Zongke HE, Chao SU   +13 more
doaj   +1 more source

Research progress and current status of dynamic wave propagation characteristics in rock mass: A review

Deep Underground Science and Engineering, EarlyView.
This review elucidates the velocity–dispersion–attenuation coupling mechanisms of wave propagation in rock masses, compares six representative models, and reveals how pressure, temperature, mineral composition, and anisotropy jointly control dynamic responses in complex geological media.
Jiajun Shu, Tao Li, Ruiqi Yuan, Yue Li, Bingni Wu, Bo Liu, Zhengding Deng, Galindo Rubén, Fausto Molina‐Gómez   +8 more
wiley   +1 more source

Mechanical behavior and failure mechanisms of rock bolts subjected to static-dynamic loads

International Journal of Mining Science and Technology
This study explores the effects of dynamic and static loading on rock bolt performance a key factor in maintaining the structural safety of coal mine roadways susceptible to coal bursts.
Hongpu Kang, Guiyang Yuan, Linpo Si, Fuqiang Gao, Jinfu Lou, Jinghe Yang, Shuangyong Dong   +6 more
doaj   +1 more source