Numerical Simulation of Smoke Variation During Fire in Intake Airways on a Coal Mining Face

2018 ◽  
pp. 652-663
Author(s):  
Wang Jian-guo ◽  
Wu Rui-meng ◽  
Wang Yan-qiu ◽  
Su Jun-kai
Keyword(s):  
Numerical Simulation ◽  
Coal Mining ◽  
Mining Face

Laws of Formation and Evolution of Pressure Arch in Coal Mining Adjoining Rock

2011 ◽  
Vol 243-249 ◽  
pp. 2596-2600
Author(s):  
Xiao Li Du ◽  
Hong Wei Song ◽  
Jie Chen
Keyword(s):  
Numerical Simulation ◽  
Coal Mining ◽  
Vertical Direction ◽  
Stress Transfer ◽  
Surrounding Rock ◽  
Coefficient Variation ◽  
Working Face ◽  
Formation And Evolution ◽  
Mining Face ◽  
Adjoining Rock

Based on numerical simulation of computing Software ANSYS, the curve of arching coefficient variation of pressure arch due to actual mining was analyzed aiming to a special mining face, the law of stress transfer and change in surrounding rock was discussed, and the evolving features and characteristics of pressure arch was obtained. The analysis and discussion show the following facts: Arch body will become thicker and stress in the arch body increases with working face’s driving distance increasing; the morphology of pressure arch transits from ellipsoid with long axis in the vertical direction to ellipsoid with long axis in the horizontal direction along the trend of working face; along the tendency of working face, the morphology of pressure arch is a ellipsoid with long axis in the vertical direction.

Fluent Based Numerical Analysis of Eliminating Ultra-Limit Gas in Upper Corner by Using Rotary Jet Fan

2011 ◽  
Vol 201-203 ◽  
pp. 2212-2215 ◽  
Author(s):  
Jing Yuan Chen ◽  
Xiu Qin Fan ◽  
Zheng Liu
Keyword(s):  
Numerical Simulation ◽  
Coal Mining ◽  
High Speed ◽  
Ventilation System ◽  
Gas Accumulation ◽  
Actual Application ◽  
Actual Environment ◽  
Fluent Software ◽  
Jet Fan ◽  
Mining Face

For the problem of gas accumulation in upper corner of "U" type ventilation system mining face, a new approach to eliminating gas accumulation in upper corner of coal mining face by using high-speed rotating jet is proposed based on flow law of rotary jet and actual environment of coal mining face. The numerical simulation with Fluent software is carried out. The results show that when fan is mounted close to the wall, the high-speed rotating jet has good Coanda effect, little impact on air flow structure of coal mining face, and is significantly effective to deal with gas accumulation in upper corner. FLUENT based numerical simulation provides a theoretical basis for actual application of rotary jet fan in coal mining face.This template explains and demonstrates how to prepare your camera-ready paper for Trans Tech Publications. The best is to read these instructions and follow the outline of this text.

Study on Reasonable Filling Width of Gob-Side Entry Retaining and its Engineering Application

2013 ◽  
Vol 807-809 ◽  
pp. 2288-2293 ◽  
Author(s):  
Xiang Qian Wang ◽  
Xiang Rui Meng ◽  
Zhao Ning Gao
Keyword(s):  
Numerical Simulation ◽  
Coal Mining ◽  
Coal Mine ◽  
Field Measurement ◽  
Engineering Application ◽  
Coal Pillar ◽  
Simulation Software ◽  
Mining Face ◽  
Pillar Size

Based upon the engineering background of IV315 coal mining face of Mengzhuang Coal Mine, the numerical simulation software UDEC is used to analyze rational packing width under the conditions of different filling widths on the driving roadway. The rational coal pillar size is initially decided as 2.0 meters through simulating and analyzing. On this basis, the influence of second mining on the retaining roadway was analyzed by numerical simulation. Combined with the field measurement, the support parameters and the 2.0 meters packing width are proven to be rational, which provides a reference for the coal mining faces with similar conditions.

The Adaptation Analysis of the Fully Mechanized Coal Mining Face of Huopu Mine’s Third Soft Coal Seam

2014 ◽  
Vol 1049-1050 ◽  
pp. 335-338 ◽  
Author(s):  
Fa Quan Liu ◽  
Xue Wen Geng ◽  
Yong Che ◽  
Xiang Cui
Keyword(s):  
Coal Seam ◽  
Coal Mining ◽  
Geological Condition ◽  
Soft Coal ◽  
Working Face ◽  
Mining Face ◽  
Soft Coal Seam ◽  
Working Resistance

To get the maximum coal in front of the working face of the 17# coal seam, we installed a longer beam which is 1.2m in length in the leading end of the original working face supports ZF3000/17/28, and know that working face supports’ setting load and working resistance are lower .We changed the original supports with shield supports ZY3800/15/33 that are adaptable in the geological condition and got the favorable affection.

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