Mechanical Design of End Support in Coal Mine

2014 ◽  
Vol 981 ◽  
pp. 778-781
Author(s):  
Hua Wen Zhou
Keyword(s):  
Work Environment ◽  
Coal Mine ◽  
Mechanical Design ◽  
Work Efficiency ◽  
Coal Face ◽  
Mine Production

End support on coal face is an important equipment of improving the work efficiency and the safety of coal mine production. Based on the work environment and the requirements for end support, the research analyzed the mechanical design of end support, such as its structure and composition. Moreover, several features which need to be paid attention to in the design of end support were proposed as well.

The Accident Process Research of Gas Explosion Based on Situation Cognition

2011 ◽  
Vol 356-360 ◽  
pp. 666-670
Author(s):  
Lian Hua Cheng ◽  
Shu Gang Li ◽  
Hai Fei Lin
Keyword(s):  
Production Process ◽  
Work Environment ◽  
Coal Mine ◽  
Interaction Mechanism ◽  
Major Change ◽  
Process Research ◽  
Gas Explosion ◽  
Work Process ◽  
Mine Production ◽  
Unsafe Behavior

Accident is undesired to anyone. But the research shows that the main cause of accident is unsafe behavior. The interaction mechanism of accident system was analyzed in the process of gas explosion through typical accidents and the conclusion was that the accident was occurred because unsafe behavior induced the dangerous factor in work environment. In order to further acquaint of it, the situation cognition of workers in the coal mine production process was analyzed with the research of aviation. The cognition of safe information in work process was affected by workload, goal, work habituation and others. As workload increased, goal strengthened, the attention apperceived safe information is weaken and the major change of safe information wasn’t apperceived immediately in work environment, and the accident was happened in conditions of unsafe behavior. Finally, the accident model based on situation cognition was posed and some measures were proposed.

The Characteristics of Collapse Columns in Duanwang Minefield and their Influences on Gas Emission Quantities of Coal Faces

2013 ◽  
Vol 634-638 ◽  
pp. 3537-3540
Author(s):  
Xin Xian Zhai ◽  
Xiao Ju Li ◽  
Yan Wei Zhai
Keyword(s):  
Coal Mine ◽  
Production Capacity ◽  
Mining Area ◽  
Mine Safety ◽  
Shanxi Province ◽  
Free Form ◽  
Karst Collapse ◽  
Coal Face ◽  
Gas Emission ◽  
Mining Depth

Duanwang Coal Mine is located at north of Qinshui coalfield in Shanxi province, China, which gently inclined and thick seams have been mined. Authorized production capacity of the coal mine is 1.8Mt/a. With the increase of mining depth, the mine gas emission quantity increased. Karst collapse columns are very developed in the minefield, and the phenomenon of abnormal gas emission always occurred at the coal face and driving gateway around the collapse columns, then the mine became high gassy one from low gassy mine. Using field measurement and theoretical analysis methods, the following conclusion can be drawn. Karst collapse columns have significant influences on gas emission of the coal face and driving gateway. Here are large amount of free form gas into and around the collapse columns, the collapse columns were disclosure while driving gateway, a large amount of the free gas into collapse column would be instantly released, which caused abnormal gas emission at driving gateway, even leading to gas density exceeding limitation by Coal Mine Safety Regulation of China. However, during mining area of the collapse columns, gas emission quantity at coal face was relatively smaller.

Influences of Mining Depths of Coal Faces in Duanwang Coal Mine on the Gas Emission Law

2013 ◽  
Vol 295-298 ◽  
pp. 2874-2878
Author(s):  
Xin Xian Zhai ◽  
Yan Wei Zhai ◽  
Shi Wei Zhang
Keyword(s):  
Theoretical Analysis ◽  
Coal Mine ◽  
Production Capacity ◽  
Control Measures ◽  
Shanxi Province ◽  
Coal Face ◽  
Gas Emission ◽  
Average Value ◽  
Mining Depth ◽  
Selection Of

Duanwang Coal Mine in Shanxi province, China, is located at north of Qinshui coalfield which gently inclined and thick seams have been mined. Authorized production capacity of the coal mine is 1.8Mt/a. With the increase of mining depth, the mine gas emission quantity increased. The mine became high gassy one from low gassy mine. Using field measurement and theoretical analysis methods, the following conclusion can be drawn. Gas emission quantity of coal face is directly correlated with mining depth. With the increase of mining depth, both absolute and relative gas emission quantities at coal face increased. The gradient of gas emission quantity was 0.0438-0.1338m3/t/m, the average value was 0.1062m3/t/m. These results would provide a foundation for prediction of the gas emission quantity and selection of gas control measures.

scholarly journals Simulating the Various Subsystems of a Coal Mine

2016 ◽  
Vol 6 (3) ◽  
pp. 993-999 ◽  
Author(s):  
V. Okolnishnikov ◽  
S. Rudometov ◽  
S. Zhuravlev
Keyword(s):  
Control Systems ◽  
Coal Mine ◽  
Simulation Models ◽  
Simulation System ◽  
Interactive Simulation ◽  
Coal Face ◽  
Visual Interactive Simulation ◽  
Process Control Systems ◽  
New Process ◽  
Actual Control

A set of simulation models of various subsystems of a coal mine was developed with the help of a new visual interactive simulation system of technological processes. This paper contains a brief description of this simulation system and its possibilities. The main possibilities provided by the simulation system are: the quick construction of models from library elements, 3D representation, and the communication of models with actual control systems. These simulation models were developed for the simulation of various subsystems of a coal mine: underground conveyor network subsystems, pumping subsystems and coal face subsystems. These simulation models were developed with the goal to be used as a quality and reliability assurance tool for new process control systems in coal mining.

scholarly journals Factors of work environment hazardous for health in opinions of employees working underground in the ‘Bogdanka’ coal mine

2019 ◽  
Vol 26 (3) ◽  
pp. 409-414 ◽  
Author(s):  
Joanna Strzemecka ◽  
Małgorzata Goździewska ◽  
Jerzy Skrodziuk ◽  
Elżbieta Galińska ◽  
Stanisław Lachowski
Keyword(s):  
Work Environment ◽  
Coal Mine

scholarly journals Prediction of the First Weighting from the Working Face Roof in a Coal Mine Based on a GA-BP Neural Network

2019 ◽  
Vol 9 (19) ◽  
pp. 4159
Author(s):  
Tan ◽  
Yang ◽  
Chang ◽  
Zhao
Keyword(s):  
Neural Network ◽  
Coal Mine ◽  
Bp Neural Network ◽  
Prediction Models ◽  
Initial Pressure ◽  
Mining Area ◽  
Mine Pressure ◽  
Mine Production ◽  
Production Safety ◽  
Matlab Programming

The accidents caused by roof pressure seriously restrict the improvement of mines and threaten production safety. At present, most coal mine pressure forecasting methods still rely on expert experience and engineering analogies. Artificial neural network prediction technology has been widely used in coal mines. This new approach can predict the surface pressure on the roof, which is of great significance in coal mine production safety. In this paper, the mining pressure mechanism of coal seam roofs is summarized and studied, and 60 sets of initial pressure data from multiple working surfaces in the Datong mining area are collected for gray correlation analysis. Finally, 12 parameters are selected as the input parameters of the model. Suitable back propagation (BP) and GA(genetic algorithm)-BP initial roof pressure prediction models are established for the Datong mining area and trained with MATLAB programming. By comparing the training results, we found that the optimized GA-BP model has a larger determination coefficient, smaller error, and greater stability. The research shows that the prediction method based on the GA-BP neural network model is relatively reliable and has broad engineering application prospects as an auxiliary decision-making tool for coal mine production safety.

The Causes Analysis and Control Measures about Rapid Floor Heave in Deep Mine

2011 ◽  
Vol 94-96 ◽  
pp. 786-790 ◽  
Author(s):  
Sheng Zhang ◽  
Zheng Bei ◽  
Yi Fei Zhang
Keyword(s):  
Reference Values ◽  
Coal Mine ◽  
Control Measures ◽  
Deep Mine ◽  
Mine Production ◽  
Floor Heave ◽  
Short Time ◽  
And Control

With the depth of coal mine increasing, it appeared a phenomenon of rapid floor heave in some roadways in a short time, which threaten greatly to the normal mine production and the lives safety of workers. The causes and control measures about rapid floor heave are analyzed in this paper. Which has a certain reference values for preventing and controlling rapid floor heave in deep mine.

Research on Mechanical Engineering with Innovative Design of Gantry Planer

2013 ◽  
Vol 345 ◽  
pp. 27-30
Author(s):  
Chang Fa Wang ◽  
Feng Lan Wang
Keyword(s):  
Energy Cost ◽  
Mechanical Engineering ◽  
Production Efficiency ◽  
Mechanical Design ◽  
Work Efficiency ◽  
Innovative Design ◽  
Improve Production ◽  
Improve Production Efficiency

The design for traditional gantry planer aims at its empty stroke and low work efficiency of the two fatal flaws in this paper. We adopted the structure innovation by mechanical design and designed the gantry planer bidirectional shaping turret. And the device is simple in structure and easy in manufacture. These make improved gantry planer remove empty stroke and change one-way shaping into two-way shaping. Thus the improved gantry planer can depress energy cost consumedly and improve production efficiency. This will broaden its market greatly in the machining industry.

Research and Application of Mine Roadway Deformation Monitoring by Ultrasonic Technology

2014 ◽  
Vol 962-965 ◽  
pp. 1070-1074 ◽  
Author(s):  
Sheng Li ◽  
Xin Lin Jin ◽  
Ming Kun Luo ◽  
Chao Jun Fan
Keyword(s):  
Data Storage ◽  
Coal Mine ◽  
Deformation Monitoring ◽  
Mine Production ◽  
Ultrasonic Technology ◽  
Mine Roadway ◽  
Distance Sensor ◽  
Arduino Microcontroller ◽  
Roadway Deformation ◽  
Sd Card

Coal mine roadway deformation have a significant impact on coal mine production. Based on the Arduino microcontroller system and ultrasonic distance sensor, through temperature compensation and system fixes, designed a roadway deformation monitoring system which is high accuracy, low price and simple operation. Monitoring results through the LCD display, and SD card for data storage, the system achieved real-time monitoring of roadway deformation. The system was actually tested in coal mine, and achieved good monitoring results.

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