Results 121 to 130 of about 359,370 (309)

Multiple injection techniques to stimulate complex fracture networks in coal reservoirs: A case study on gas disaster reduction of subsurface coal mine in southwest China

Deep Underground Science and Engineering, EarlyView.
An experimental device for physical simulation of hydraulic fracturing, comprising: a load‐bearing mechanism with multiple interconnected plates that collectively form an sample chamber; a load‐generating mechanisms, with multiple load‐generating mechanisms arranged within the experimental chamber.
Delei Shang, Farui Shi, Jun Lu, Minghui Li, Cunbao Li, Heping Xie   +5 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

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

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

COAL MINING [PDF]

The Developing Economies, 1979
openaire   +1 more source

THE EFFECTS OF THE MINING ACTIVITY OVER THE WATERS FROM JIU VALLEY [PDF]

The upper Jiu Valley, around Petrosani and Lupeni, is Romania�s principal coal mining region. Many miners feel that coal mining in Romania is a moribund industry that will never regain its position of significance. Environmental contaminants associated
Cristina BARBU
core  

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

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

Optimization of Binocular Vision Ranging Based on Sparse Stereo Matching and Feature Point Extraction

IEEE Access
In recent years, the advancement in ranging accuracy and distance requirements in the ship industry has underscored the paramount importance of controlling ranging error.
Zhiliang Chen, Wei Zhang, Shilin Li, Kaixiong Zhu, Huiyuan Chen   +4 more
doaj   +1 more source

Pengaruh Motivasi Internal dan External terhadap Kinerja Karyawan Pt.trubaindo Coal Mining di Kutai Barat [PDF]

, 2016
The background of this research aspects of internal motivation and motivation eksternal. Data this study was obtained from the method of the results of responses of respondents (questionnaire), as well as other research relefan with the object under ...
Elfreda Aplonia Lau, Dedy Nor, LCA. Robin Jonathan
core   +1 more source