Results 11 to 20 of about 33,183,762 (290)

Lost-ore mining—A supplementary mining method to sublevel caving

International Journal of Rock Mechanics and Minings Sciences, 2023
Abstract Sublevel caving (SLC) is a mass mining method having high productivity and high safety. However, this method often causes a considerable amount of permanent ore loss. Interestingly, all lost ores are buried in the broken waste rocks that come mostly from the caved hanging wall and partly from the ore body in which ore and waste rock are ...
Zongxian Zhang
exaly   +3 more sources

Research on roof caving mechanism and influencing factors in inclined ore body caving mining

Results in Engineering
In the process of caving mining, the overlying strata often fall down to form a concealed goaf. The goaf of caving method is characterized by strong concealment, complex shape and unstable roof.
Xin Bai, Pengrui Zhu
doaj   +3 more sources

Theoretical Investigation of the Sliding Instability and Caving Depth of Coal Wall Workface Based on the Bishop Strip Method

Advances in Civil Engineering, 2019
As mining height increases, the influence of coal wall caving on safety production becomes stronger. There is no systematic and effective method to analyse the risk of coal wall caving and its slip caving depth.
Chao Li, Tianhe Kang, Xiaopo Li, Ligong Li, Xiaoyu Zhang, Runxu Zhang   +5 more
doaj   +2 more sources

Determination of the suitable height at sublevel – caving methods [PDF]

Acta Montanistica Slovaca, 1998
The paper in a short form deals with theoretical aspects of the sublevel-caving methods on iron deposits Nižná Slaná and Kobeliarovo. This mining method in a stope-block use the LHD system mechanization by the all underground caving stoping technology ...
Bauer Viliam
doaj   +1 more source

Top-coal initial caving law of continuous group caving method in extra-thick coal seams

矿业科学学报, 2023
In order to clarify the law of top coal caving with continuous group caving method in extra-thick coal seams, this study investigated the influences of the caving openings width on the morphological characteristics of caving body, the evolution law of ...
Wang Zuguang, Wang Shen, He Ziang, Li Huamin   +3 more
doaj   +1 more source

Quantitative Evaluation of Top Coal Caving Methods at the Working Face of Extra-Thick Coal Seams Based on the Random Medium Theory

Advances in Civil Engineering, 2021
Adopting an effective top coal caving method is the key to enhancing coal recovery and reducing gangue content for the fully mechanized top coal caving working face with extra-thick coal seams.
Shi Jiulin, Zhang Quntao, Gao Xiaojin, Xue Jisheng   +3 more
doaj   +1 more source

Mining-Induced Stress Control by Advanced Hydraulic Fracking under a Thick Hard Roof for Top Coal Caving Method: A Case Study in the Shendong Mining Area, China

Minerals, 2021
Fully mechanized top-coal caving mining with high mining height, hard roofs and strong mining pressure are popular in the Shendong mining area, China. The occurrence of dynamic disasters, such as rock burst, coal and gas outburst, mine earthquakes and ...
Kaige Zheng, Yu Liu, Tong Zhang, Jingzhong Zhu   +3 more
semanticscholar   +1 more source

Three-dimensional simulation of feeding and coal caving in fully mechanized caving face based on YADE

Meikuang Anquan, 2022
Based on the discrete element development environment YADE under Linux environment, this paper develops a three-dimensional simulation system for continuous feeding and coal caving in fully mechanized caving face.
YANG Yi, GAO Yang, LUO Kaicheng, WANG Keping, FEI Shumin
doaj   +1 more source

Study on Instability Mechanism of Extraction Structure under Undercut Space Based on Thin Plate Theory in Block Caving Method

, 2021
The instability of extraction structure under the undercut space in the block caving stope presents specific characteristics: rib spalling and floor heave in ore-loading roadway and collapse of major apexes.
Z. Xia, Z. Tan
semanticscholar   +1 more source

Determination on Reasonable Mining Height and Top Coal Caving Technology in Huating Coal Mine

Meikuang Anquan, 2020
In view of the problems, such as coal wall spalling, roof caving and low recovery rate of top coal in 250107-1 fully mechanized caving face of Huating Coal Mine at present, the method of combining FLAC3D numerical analysis and theoretical calculation ...
QIAO Zhongdong, QU Ying, YANG Guohong, LIU Biao
doaj   +1 more source