scholarly journals Coal Wall and Roof Segmentation in the Coal Mine Working Face Based on Dynamic Graph Convolution Neural Networks

ACS Omega ◽  
2021 ◽  
Author(s):  
Zhizhong Xing ◽  
Shuanfeng Zhao ◽  
Wei Guo ◽  
Xiaojun Guo ◽  
Shenquan Wang ◽  
...  
Keyword(s):  
Neural Networks ◽  
Coal Mine ◽  
Mine Working ◽  
Dynamic Graph ◽  
Convolution Neural Networks ◽  
Working Face ◽  
Coal Wall

scholarly journals Comprehensive Measurement of the Deformation and Failure of Floor Rocks: A Case Study of the Xinglongzhuang Coal Mine

Geofluids ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Hao Liu ◽  
Pu Wang ◽  
Weihe Zhang ◽  
Qiang Liu ◽  
Lijun Su
Keyword(s):  
Coal Mine ◽  
Abutment Pressure ◽  
Three Dimensional ◽  
Strain Sensing ◽  
Floor Rock ◽  
Deformation And Failure ◽  
Working Face ◽  
Floor Failure ◽  
Coal Wall ◽  
Different Depths

The isolated island panel 10304 of the Xinglongzhuang coal mine was used as the research subject to study the deformation and damage characteristics of the coal seam floor. The damage of the floor was studied using the borehole strain sensing method and borehole imaging technology, and FLAC3D was used to study the influence of abutment pressure on floor failure. The result shows that the floor under the superimposed area which is affected by lateral and advanced abutment pressure is damaged firstly, and the maximum depth reaches 26 m, other areas of the working face about 23 m. The degree of deformation and failure of floor rock at different depths is decreased. The deformation damage increases with the advancement of the working face until a certain distance at the same depth. The hole image can clearly show the influence range of the abutment pressure in front of the coal wall and influence the degree of the advancement and lag by means of the strain increment curve for each sensor probe and the images from different drilled positions. On the basis that the results of simulation and field measurement are consistent, the results can reflect the three-dimensional failure characteristics of the whole island working face floor in the process of coal mining more comprehensively and accurately; moreover, they also can provide important information for mine flood prevention and ecological environment protection.

Water Probe in Coal Mine Working Face

2013 ◽  
Vol 734-737 ◽  
pp. 888-891
Author(s):  
Chen Shi
Keyword(s):  
Hydraulic Conductivity ◽  
Coal Mining ◽  
Coal Mine ◽  
Mine Working ◽  
Mine Water ◽  
Theoretical Calculations ◽  
Drainage System ◽  
Water Inflow ◽  
Interference Method ◽  
Working Face

Water probe in coal mine working face is an important part of the work of Mine Water. When the mine working face close to the aquifer hydraulic conductivity faults, underground rivers, caves and hydraulic conductivity collapse columns; extractive damaging effects, water probe should be done. However, the calculation of water inflow face probe has no feasible way. This paper discussed the theoretical calculations to explore water drilling inflow well group interference method and provides the basis for provision of drainage system for the coal mining enterprises.

Study on Numerical Simulation of Fully Mechanized Top Coal’s Caving Property of Tang Gong Ta Coal Mine

2015 ◽  
Vol 1094 ◽  
pp. 410-414
Author(s):  
Quan Ming Liu
Keyword(s):  
Numerical Simulation ◽  
Stress Concentration ◽  
Coal Mine ◽  
Peak Stress ◽  
Simulation Method ◽  
Numerical Simulation Method ◽  
Working Face ◽  
Coal Wall

Using numerical simulation method,fully mechanized top coal’s caving property of Tang gong ta coal mine was studied.The results show at primary mining period of fully mechanized working face, there were stress concentration regions at the front and rear of coal wall,but it was not distinct in the front and top coal’s caving property was not ideal.When it advanced to 84m of the working face,there would be obvious peak stress at the front and rear of coal wall. It accelerated top coal’s caving.When it advanced to 140m of the working face,top coal was caved with coal mining.Finally it was proved on the scene. The results of the study in fully mechanized mining’s safety and efficiency has some guiding role.

Simulation of a methane fire event at a coal mine working face with consideration of ventilation curtain damage

Transactions ◽  
2016 ◽  
Vol 340 (1) ◽  
pp. 120-126
Author(s):  
A. Haghighat ◽  
K. Luxbacher ◽  
B. Lattimer
Keyword(s):  
Coal Mine ◽  
Mine Working ◽  
Fire Event ◽  
Working Face

Light Source Distribution for Visible Light Communication in Coal Mine Working Face Based on Position and Power Co-Optimization

2019 ◽  
Vol 46 (4) ◽  
pp. 0406001 ◽  
Author(s):  
游春霞 You Chunxia ◽  
胡青松 Hu Qingsong ◽  
李世党 Li Shidang ◽  
马勇 Ma Yong ◽  
陈浩 Chen Hao
Keyword(s):  
Visible Light ◽  
Light Source ◽  
Coal Mine ◽  
Mine Working ◽  
Visible Light Communication ◽  
Source Distribution ◽  
Working Face
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