scholarly journals Study on fracture shape distribution characteristics and micromechanical properties of middling coal

AIP Advances ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 075324
Author(s):  
Liang Si ◽  
Yijun Cao ◽  
Guixia Fan ◽  
Song Wang
Keyword(s):  
Distribution Characteristics ◽  
Shape Distribution ◽  
Micromechanical Properties ◽  
Fracture Shape

scholarly journals Study on Plastic Zone Distribution Characteristic of Coal and Rock Mass in Excavation from Crosscut Coal

Geofluids ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Chengwu Li ◽  
Xiaoqian Zhang ◽  
Chengmin Wei ◽  
Yao Nie
Keyword(s):  
Rock Mass ◽  
Stress Distribution ◽  
Plastic Zone ◽  
Morphological Characteristics ◽  
Coal And Gas Outburst ◽  
Distribution Characteristics ◽  
Prevention Measures ◽  
Shape Distribution ◽  
Gas Outburst ◽  
Working Face

Coal and gas outburst is a serious disaster in the mining, and crosscut coal is the most prone to cause the coal and gas outburst. In order to study the mechanism of outburst, this paper studied the stress distribution characteristics in front of the working face in the process of rock roadway driving before implementing crosscut coal firstly. On this basis, the hypothesis of stress distribution on the “strong and soft face” of coal-rock mass was proposed. And by using the hypothesis, the mechanical equation for the parameter changes of the plastic zone in front of the working face in crosscut coal was established, and the width and morphological characteristics of the plastic zone in crosscut coal were analyzed. The results show that during the process, as the working face moves forward, the shape distribution of the plastic zone in front of the working face changes from the “semielliptical” to “semibutterfly,” And based on the distribution characteristics of plastic zone in working face in crosscut coal, modification proposals for outburst-prevention measures were proposed and provided technical support for the outburst-prevention measures and key parameters setting to prevent the coal outburst in crosscut coal.

AUTOMATIC SYSTEM FOR MICROMECHANICAL PROPERTIES ANALYSIS

1981 ◽  
Vol 42 (C5) ◽  
pp. C5-1129-C5-1134
Author(s):  
S. Etienne ◽  
J. Y. Cavaille ◽  
J. Perez ◽  
M. Salvia
Keyword(s):  
Automatic System ◽  
Micromechanical Properties

Distribution characteristics on indoor radon concentration of multiple-use facilities in Gwangju area

2019 ◽  
Vol 18 (2) ◽  
pp. 177-184 ◽  
Author(s):  
Min-jin Kim ◽  
Sang-su An ◽  
Min-cheol Cho ◽  
Se-il Park ◽  
Jong-min Kim ◽  
...  
Keyword(s):  
Radon Concentration ◽  
Indoor Radon ◽  
Distribution Characteristics ◽  
Multiple Use ◽  
Indoor Radon Concentration
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