scholarly journals Characteristics of Strata Behavior during Thick Seam Mining by Fully-Mechanized Top Coal Caving in a Loess-Covered Gullied Region

Minerals ◽  
2017 ◽  
Vol 7 (4) ◽  
pp. 63 ◽  
Author(s):  
Xu-feng Wang ◽  
Yang Wang ◽  
Dong-sheng Zhang ◽  
Hong-zhi Wang ◽  
Yang Zhang ◽  
...  
Keyword(s):  
Thick Seam ◽  
Strata Behavior ◽  
Seam Mining

Driving and ventilating shallow development workings in thick seam mining

1993 ◽  
Vol 28 (5) ◽  
pp. 472-474 ◽  
Author(s):  
A. M. Goryunov ◽  
V. I. Klopov ◽  
G. I. Kulakov ◽  
A. N. Naumov ◽  
V. M. Makridin ◽  
...  
Keyword(s):  
Thick Seam ◽  
Seam Mining

Analysis of Three-Dimensional Numerical Simulationin on Overlying Strata’s Stress Field and Displacement Field in Thick Seam Mining

2013 ◽  
Vol 718-720 ◽  
pp. 1919-1922
Author(s):  
Meng Lin Xu ◽  
De Shen Zhao
Keyword(s):  
Numerical Simulation ◽  
Stress Field ◽  
Coal Mining ◽  
Displacement Field ◽  
Three Dimensional ◽  
Mining Technology ◽  
Thick Seam ◽  
High Efficient ◽  
Seam Mining ◽  
Overburden Strata

It takes the typical coal of mining in S2S9 face of Daping mine, using the 3-D numerical simulation to reveal on its face with the vertical characteristics of the stress field and displacement field .The study showed that the overburden strata migration features during the mining process in in thick seam mining of Daping mine.This research can be a reference for safety and high efficient coal mining of other parts of the soft overburden in extra- thick seam mining technology.

Finite Element Analysis of Abutment Pressure Distribution Characteristic of Working Faces in Fully Mechanized Sublevel Caving Face

2011 ◽  
Vol 71-78 ◽  
pp. 3358-3361 ◽  
Author(s):  
Hong Chun Xia ◽  
Zhen Qi Song ◽  
Li Jing Ru
Keyword(s):  
Finite Element Analysis ◽  
Abutment Pressure ◽  
Dynamic Change ◽  
Plastic Region ◽  
Constitutive Relationship ◽  
Distribution Characteristic ◽  
Element Analysis ◽  
Thick Seam ◽  
Sublevel Caving ◽  
Seam Mining

The elastic-plastic constitutive relationship and the Drucker-prager yielding criterion are used to simulate the behaviour of non-linear geo- materials. Dynamic change laws of abutment pressure of S2S2 work face of xiaokang coal mine is simuluted by the ansys program. It is shown that the distribution of abument pressure can be divided into two zones, elastic region and plastic region. The front inside the 13m distance is plastic zone. The zone outside 13m distance is elstic zone. The affecting scope is 144m when the concentrated coefficient of abutment pressure is 5%. The affecting scope is 160m when the concentrated coefficient of abutment pressure is 3%. The simulation provides a reference bases for the application and promotion of thick seam mining technology.

scholarly journals Study on the Evolution Characteristics of Two-Zone Failure Mode of the Overburden Strata under Shallow Buried Thick Seam Mining

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Daming Yang ◽  
Wenbing Guo ◽  
Yi Tan
Keyword(s):  
Failure Mode ◽  
Fracture Zone ◽  
Layer Structure ◽  
Physical Modelling ◽  
Thick Seam ◽  
Working Face ◽  
Evolution Characteristics ◽  
Caving Zone ◽  
Seam Mining ◽  
Overburden Strata

There are risks of water burst and sand inrush in the working face of the Northwest Mining Area in China. Based on the 22407 working face of Halagou coal mine, the evolution characteristics and mechanism of a two-zone failure mode of the overburden strata in shallow buried thick seam mining were thoroughly analysed using physical modelling, theoretical analysis, on-site observation, and other research methods. A method to calculate the overburden fissure width was also proposed. The analysis results indicated that the evolution of a two-zone failure mode of the overburden strata mainly includes four stages: gestation, formation, transformation, and stabilization. In the transformation stage, a fracture zone is transformed into a caving zone. The caving zone and fracture zone are separately transferred to the working face direction based on the structure type of key strata of voussoir beam and cantilever beam after the heights of the two zones stabilize, and the “two-belt” cracks are mainly composed of inclined and horizontal fissures. Based on this study, the mechanism of the two-zone failure mode of overburden strata development was analysed according to the mining height and overburden strata key layer structure. This paper serves as a guide for safe and green mining on shallow buried thick seams.

Analysis of Three-Dimensional Numerical Simulationin Rlue of the Migration Rule of Overlying Strata in Thick Seam Mining with Soft of Daping Mine

2013 ◽  
Vol 718-720 ◽  
pp. 1934-1937
Author(s):  
Meng Lin Xu ◽  
De Shen Zhao
Keyword(s):  
Theoretical Analysis ◽  
Coal Seam ◽  
Three Dimensional ◽  
Fissure Zone ◽  
Thick Coal Seam ◽  
Thick Seam ◽  
Soft Coal ◽  
Soft Coal Seam ◽  
Seam Mining ◽  
Overlying Strata

In order to delve better what research methodology of height of water conducted fissure zone are, especially in mining of thick coal seam with soft, 3-D numerical simulationin was used to S2S9 face of Da Ping mine, it reveals the damage movement rule of overlying strata in mining roof-coal in "Three Soft" coal seam in the end . Thus it confirms the height of the water flowing fractured zone and tests the simulation result by the theoretical analysis and simple hydrology observation result. it provides a new idea for the application soft overburden in extra- thick seam mining technology.

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