Results 31 to 40 of about 4,791 (276)

Determination of Water-Proof Coal (Rock) Pillar Height in Mining Coal Seam Group under Water-Bearing Rock Stratum

Shock and Vibration, 2021
In order to determine the reasonable height of water-proof coal (rock) pillar when mining multiple coal seams under aquifer, this paper analyzes the expansion height of water-conducting fracture zone when coal seams mining.
Feng Wan, Hongqing Zhang, Peijun Zhou, Jie Guo   +3 more
doaj   +2 more sources

Temporal and Spatial Evolution Mechanisms of the Water-Conducting Fractured Zone of Overlying Strata in the Kongzhuang Coal Mine

Geofluids, 2023
Kongzhuang coal mine of Shanghai Datun Energy Resources Co., Ltd. is a typical deep coal mine in eastern China. The mining disturbance of working face in deep coal mine leads to the fracture and movement of overlying strata and the damage of the aquifer ...
Zhang Pei-ding, Sun Chao-shang, Fan Xuan, Li Song-tao, Wang Long-jing, Cao Zheng-zheng   +5 more
doaj   +2 more sources

Study on Numerical Simulation of Overburden Fracture Development Characteristics and Prediction of Water-Conducting Fracture Zone Height in Shallow Coal Seam Mining

Geofluids
The northern Shanxi mining region, a pivotal coal-rich area in China, is characterized by substantial reserves of shallow coal seams and distinctive geological mining conditions that exacerbate overburden rock fissure development.
Boqing Qiao, Yingming Yang, Yang Cai, Yongqiang Zhao, Xuejia Li, Qingbiao Guo   +5 more
core   +2 more sources

Prediction of the Water-Conducting Fracture Zone Height Across the Entire Mining Area Based on the Multiple Nonlinear Coordinated Regression Model

Water
The water-conducting fracture zone (WCFZ) is a critical geological structure formed by the destruction of overburden during coal mining operations. Accurately predicting the height of the water-conducting fractured zone (HWCFZ) is essential for ensuring ...
Xiaoming Shi, Jiasen Chen, Jianye Feng, Kang Wang   +3 more
core   +2 more sources

Dynamic evolution of water conducting fracture zones and roof water hazard early warning based on 3d spatial clustering. [PDF]

Sci Rep
Roof water inrush, induced by upward-developing water-conducting fracture zones (WCFZ) into aquifers, poses significant risks in coal mining. Conventional monitoring methods struggle with accurately capturing the complex 3D spatial structure and dynamic evolution of WCFZs.
Cui M, Hou E, Fan J, Hou P, Feng D.
europepmc   +4 more sources

Numerical modeling of coupled stress-fracture evolution in water-resisting key strata during longwall mining [PDF]

Scientific Reports
During underground coal mining, the evolution of stress and fracture development within the overlying water-resisting key strata (WRKS) significantly impacts its water-resisting properties, thereby making it a critical factor controlling the stability of
Huadong Gao, Li Ji, Yanli Huang, Junmeng Li   +3 more
doaj   +2 more sources

Physical Simulation of the Water-Conducting Fracture Zone of Weak Roofs in Shallow Seam Mining Based on a Self-Designed Hydromechanical Coupling Experiment System

, 2020
Due to inappropriate mining practices, water-conducting fracture zones can develop in an aquifer, not only destroying the surface-water environment but also causing water inrush, even hurting or killing workers. To avoid such disasters, investigating and
Qinghong Liu, Weiqun Liu, Hao Zha
core   +2 more sources

Evolution of Water-Conducting Fracture in Weakly Cemented Strata in Response to Mining Activity: Insights from Experimental Investigation and Numerical Simulation

Water, 2023
The accurate prediction of the vertical extent of water-conducting fracture (WCF) zones in weakly cemented strata is particularly significant in preventing and controlling water hazards in western coal mines. The evolution of fractures in weakly cemented
Quanhui Liu, Chenyao Zhou, Dan Ma, Guanshi Wang, Yong Liu, Zhen Huang   +5 more
core   +2 more sources

Study on the “Two-Zone” Heights in Lower Slice Mining Under Thick Alluvium and Thin Bedrock

Applied Sciences
The extraction of thin bedrock coal seams with thick alluvium poses a challenging issue in the realm of coal safety production in China. Especially for mining under aquifers, knowing the development height of water-conducting fracture zones above the ...
Xiaowei Lu, Jingyu Jiang, Wen Wang, Haibo Cao   +3 more
doaj   +2 more sources

Determination of Fractured Water-Conducting Zone Height Based on Microseismic Monitoring: A Case Study in Weiqiang Coalmine, Shaanxi, China

Sustainability, 2022
The NO. 3 coal seam of the Weiqiang coalmine is faced with a water inrush threat caused by two large reservoirs and the upper confined aquifer. However, existing empirical formulas cannot accurately predict the height of the fractured water-conducting ...
Yingchun Li, Qingyuan He, Wei Gao
core   +2 more sources