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Application of intelligent top-coal caving technology in overlying aquifer protection of extra-thick coal seam [PDF]

Meitan kexue jishu
The grassland areas in eastern Inner Mongolia and northern Xinjiang are rich in coal and groundwater resources. The mining fissures formed by high-intensity coal mining are easy to lead to the strong water-rich aquifer, and it is very easy to cause the ...
Weixuan CHENG, Jingchuan CHEN, Lihui ZHANG, Shengyou LIU, Xin HE, Weidong PAN   +5 more
doaj   +2 more sources

Experimental study on seepage characteristics of broken coal and rock samples in caving zone under cyclic loading and unloading

矿业科学学报, 2020
When the coal-seams are multi-layered, the stress and permeability of the caving zone are disturbed again during the following coal seam mining. Repeated unloading and compaction cause caved coal and rock to break further in the caving zone, which in ...
Wang Wei, Zhang Cun, Wu Shanxi, Jia Sheng, Yang Yongsong, Jiao Yaochen, He Liu   +6 more
doaj   +1 more source

Damage mapping and monitoring in sublevel caving crosscuts at the Malmberget mine

, 2022
The LKAB’s Malmberget mine in Sweden is one of the largest sublevel caving mines in the world, with an annual production rate averaging 18 million tons.
Jones, TH, Saiang, David
core   +1 more source

Dark-zone alterations expand throughout Paleolithic Lascaux Cave despite spatial heterogeneity of the cave microbiome

Environmental Microbiome, 2023
AbstractBackgroundCave anthropization related to rock art tourism can lead to cave microbiota imbalance and microbial alterations threatening Paleolithic artwork, but the underpinning microbial changes are poorly understood. Caves can be microbiologically heterogeneous and certain rock wall alterations may develop in different rooms despite probable ...
Bontemps, Zélia, Prigent-Combaret, Claire, Guillmot, Alice, Hugoni, Mylène, Moënne-Loccoz, Yvan   +4 more
openaire   +4 more sources

Research on the "two-zone" heights of soft stratum working face with slicing full-mechanized caving mining

矿业科学学报, 2019
Water and sand inrush is one of the principal factors that restrict safe and effective production of mining under water body.The threat to soft strata mines with extremely thick coal seam is especially more serious.Caving zone and fissure zone(joint name
Zhang Bin, Xu Yanchun, Li Jianghua, Xiong Bin   +3 more
doaj   +1 more source

Law of coal caving behind the flexible shield support in pseudo-inclined working face.

PLoS ONE, 2021
Complex boundary conditions are the major influencing factors of coal caving law in the pseudo-inclined working face. The main purpose of this study is to analyze coal caving law of flexible shield support and then to establish the internal relations ...
Qinjian Zhan, Niaz Muhammad Shahani, Zhicheng Xue, Shengqiang Li   +3 more
doaj   +1 more source

Investigation of the effect of caving height on the efficiency of the longwall top coal caving production method applied in inclined and thick coal seams by physical modeling

, 2023
© 2022 Elsevier LtdThe longwall top coal caving (LTCC) production method, applied by forming a face in the horizontal thickness of the seam and also called horizontal section top coal caving, especially in studies originating from China, is widely used ...
ÖZÇELİK, YILMAZ, Çelik, A.
core   +1 more source

Numerical Study on the Movement Laws of Overlying Strata in Shallow-Buried Stope Based on the Goaf Compaction Effect

Shock and Vibration, 2021
This study presents an integrated approach including the theoretical analysis and numerical modelling to investigate the failure characteristics of the overlying strata in the shallow-buried stope.
Guangchao Zhang, Guangzhe Tao, Miao Chen, You Li, Pan Li, Yonghui Lai   +5 more
doaj   +1 more source

Stability analysis of coal mining subsidence area of underlying fully mechanized top coal caving based on Rhino3D-FLAC3D coupling technology

Meikuang Anquan, 2021
In order to qualitatively and quantitatively analyze the degree of influence of the water load on the stability of fully mechanized caving coal subsidence area, the underground coal mining subsidence area of Hongyanhe Reservoir was taken as the research ...
HUANG Jianfeng, WU Zhang, ZHANG Zhenzhen, LI Yongqiang, ZHANG Hao
doaj   +1 more source

Study on thin bedrock deformation and strata behavior in coal seam mining under ultra-thick unconsolidated strata

Gong-kuang zidonghua, 2018
Taking No.12051 fully-mechanized coal face of Zhaogu No.1 Coal Mine as research object, thin bedrock deformation and strata behavior in coal seam mining under ultra-thick unconsolidated strata were studied by use of UDEC numerical simulation software ...
ZHAI Xinxian, LYU Chao, TANG Shijie, YU Chunsheng   +3 more
doaj   +1 more source