Results 31 to 40 of about 844 (164)

Research on the evolution and height prediction of WCFZ in shallow close coal seams mining

Geomechanics and Geophysics for Geo-Energy and Geo-Resources, 2023
Based on the mining conditions of shallow close coal seams in the Jurassic coalfield of northern Shaanxi, in order to explore the evolution and development height prediction of water-conducting fracture zone (WCFZ), combining with measured statistical ...
Jian Cao, Haitao Su, Chao Wang, Jianwei Li   +3 more
doaj   +1 more source

Numerical Simulation Study on Stability Control Technology of Large-Area Wall Caving Area (LAWCA) in Large-Inclined Face

Geofluids, 2023
The caving characteristics of the goaf significantly impact the mining stability of the working face. The coal-forming environment of the steeply dipping coal seam is complex. After mining, the caving rock mass rolls to the lower part of the working face
Xun Liu, Shihao Tu, Hongsheng Tu, Long Tang, Jieyang Ma, Yan Li, Wenlong Li, Kaijun Miao, Hao Tian   +8 more
doaj   +1 more source

Wireless Sensing for Monitoring of Coal Gangue Mixing Based on PT Symmetry

IEEE Access, 2022
The challenge in using fully mechanized caving mining technology for thick coal seam mining is monitoring the mixing ratio of coal gangue during the top coal caving process.
Haoyan Xi, Yong Dong, Lei Zhang, Yanhong Liu, Xiaoqiang Su, Caixia Feng, Feng Zang, Lijuan Dong, Yunlong Shi   +8 more
doaj   +1 more source

Field survey on the evolution of main ground cracks under condition of forced hard roof caving in mining ultra-thick coal seams under shallow overburden

Meitan xuebao, 2023
The Yellow River Basin is an important ecological barrier and also an important coal base concentration area in China. The contradiction between ecological protection and coal mining is prominent. Under the conditions of typical shallow overburden, extra-
Pengfei WANG, Yifan NIU, Kehang CHEN, Jianli ZHANG, Mengnan GAO, Yang YU   +5 more
doaj   +1 more source

An optimizing microseismic method for rock burst early warning based on mining production process

Deep Underground Science and Engineering, EarlyView.
A classification early warning method of rock burst based on hourly microseismic data is proposed, which can be combined with the on‐site production process to provide more timely warning. Abstract Microseismic (MS) events have been reported in nearly every coal mining country, which could well lead to rock burst in underground coal mines.
Zepeng Han, Linming Dou, Wu Cai, Mingbo Chi, Guojun Xi, Shuai Chen, Biao Jiao   +6 more
wiley   +1 more source

Mechanical analysis of basic roof fracture mechanism and feature in coal mining with partial gangue backfilling

Open Geosciences, 2020
Coal mining with partial gangue backfilling (CMPGB) method has the advantages of both high filling efficiency and excellent workface capacity, which breaks through the technical bottleneck of full-section backfilling mining.
Wei Yin, Xiaomin Bai, Jingke Wu, Ran Zhang, Chao Liu, Ran Zhang, Yunxin Tang   +6 more
doaj   +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

Deformation Mechanism of the Coal ahead of Fully Mechanized Caving Face under High-Intensity Mining Condition

, 2021
In order to study the coal deformation and failure mechanism in fully mechanized caving face under the high-intensity mining, based on the equivalent mechanical model of transversely isotropic cylindrical coal with fractures, the equivalent equations for
Can Zhao, Yang Li, Dahe Yan, Liang Chen, Zhiheng Cheng, Bing Wu, Jingui Zhang   +6 more
core   +1 more source

Study on the Prediction of the Height of Two Zones in the Overlying Strata under a Strong Shock

Geofluids, 2021
A development of overlying strata fractures and an unknown distribution of the two zones, which results from a strong shock tendency roof short-distance coal seam group mining, are the main problems faced by Xiashijie Coal Mine.
Xingping Lai, Bowei Liu, Pengfei Shan, Feng Cui, Yun Zhang, Xudong Zhang, Rui Bai, Xuan Wu   +7 more
doaj   +1 more source

Green swans and blue skies: Climate change and insolvency risk for financial institutions

International Insolvency Review, EarlyView.
Abstract This lecture in honour of the late Gabriel Moss QC and Ian Fletcher QC examines the challenge of climate‐related financial risk. Prudential regulators and central banks recognize that the systemic nature of climate‐related financial risk makes it an emerging vulnerability relevant to cross‐border insolvency resolution.
Janis Sarra
wiley   +1 more source