Results 31 to 40 of about 2,809 (148)

Study on the Overburden Failure Law of High-Intensity Mining in Gully Areas With Exposed Bedrock [PDF]

Frontiers in Earth Science, 2022
Most hilly areas are dotted with gullies, some of which contain plenty of water, especially in rainy seasons. Once surface water penetrates the underground working face, it will lead to an increased water inflow of the working face. Even worse, it may induce water and sand burst accidents.
Tan Yi, Tan Yi, Xu Han, Yan Weitao, Guo Wenbing, Guo Wenbing, Bai Erhu, Bai Erhu, Qi Tingye, Yin Dawei, Hao Bingyuan, Cheng Hao, Shao Minghao   +12 more
openaire   +2 more sources

Seepage tests on double-layer soils composed of sandy gravel and sand under different stresses and shear displacements

Yantu gongcheng xuebao, 2018
Many high embankment dams are directly located on the deep overburden layer. After the dam is constructed, large stress and shear displacement will appear in the dam foundation, which has great influence on the seepage stability of the overburden layer ...
QI Li-cheng 1, CHEN Qun 1, ZHU Ya-jun 2
doaj   +1 more source

Orthogonal array analysis of overburden failure due to mining of multiple coal seams [PDF]

Journal of the Southern African Institute of Mining and Metallurgy, 2019
This paper presents a numerical analysis that uses an orthogonal array to investigate overburden failure caused by longwall mining of multiple coal seams. An LN(s k) array is said to be an orthogonal array with s levels, N rows, and k columns. This analysis identifies the contrasting factors that influence the height of the caving and water-conducting ...
Zhang, D., Sui, W.
openaire   +2 more sources

Evolution Characteristics of Overburden Instability and Failure under Deep Complex Mining Conditions

Geofluids, 2022
Aiming at the problems of intensified deformation and serious stress damage of stope overburden during mining in deep typical geological environment, taking the deep mining face of a mine in the northwest as the research background, the characteristics and influencing factors of overburden collapse in deep geological environment are analyzed, a ...
Xinfeng Wang, Wengang Liu, Xiaojun Jiang, Qiao Zhang, Youyu Wei   +4 more
openaire   +2 more sources

An assessment of coal pillar system stability criteria based on a mechanistic evaluation of the interaction between coal pillars and the overburden

International Journal of Mining Science and Technology, 2017
Coal pillar design has historically assigned a factor of safety (FoS) or stability factor (SF) according to their estimated strength and the assumed overburden load acting on them.
Guy Reed, Kent Mctyer, Russell Frith
doaj   +1 more source

Research on Spatiotemporal Continuous Information Perception of Overburden Compression–Tensile Strain Transition Zone during Mining and Integrated Safety Guarantee System

Sensors
The mining of deep underground coal seams induces the movement, failure, and collapse of the overlying rock–soil body, and the development of this damaging effect on the surface causes ground fissures and ground subsidence on the surface.
Gang Cheng, Ziyi Wang, Bin Shi, Tianlu Cai, Minfu Liang, Jinghong Wu, Qinliang You   +6 more
doaj   +1 more source

Law of overburden failure and roof water damage in Yuandatan Coal Mine

Meikuang Anquan, 2022
The Jurassic coal field in northern Shaanxi Province is generally threatened by roof water damage, so it is vital to study the law of overburden failure for mine safety production. Taking Yuandatan Coal Mine as an example, the development height of “two zones” in overlying rock of 11201 first working face of 2# coal seam was analyzed and studied ...
LIU Ruirui, LIU Yang, FANG Gang, LIANG Xiangyang, HUANG Hao, LIU Chenguang   +5 more
openaire   +1 more source

Threshold value of numerical index and mining height effect of overburden fracture zone height in Shendong Baode shallow coal seam

矿业科学学报, 2021
The height of overburden fissure zone is an important index to study the deformation and failure of overburden, but the existing single index can not reflect the fracture degree of surrounding rock in different space parts of stope.
Hao Xianjie, Sun Zhuowen, Zhao Yixin, Yang Ke, Zhang Cun, Zhang Qian   +5 more
doaj   +1 more source

Investigation on the Responses of Overburden Stress and Water Pressure to Mining under the Reverse Fault

Geofluids, 2021
This paper focuses on the responses of overburden stress and pore water pressure in confined aquifer to mining under the Ordovician limestone aquifer and the reverse fault.
Chengcheng Chu
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Research on overburden failure and land subsidence characteristics of double coal seam mining in Yushenfu Mining Area

Meikuang Anquan, 2023
In order to study the overburden failure characteristics and surface subsidence law of shallow buried coal seam under the condition of double coal seam mining, based on the geological conditions of typical shallow buried coal seam in Yushenfu Mining Area,
CAO Yanbo, FAN Wen, TAO Yiquan, CHENG Guang, LIU Kui, PENG Min
doaj   +1 more source