2003 Vol. 29, No. 4

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Automatic Identifying Algorithm of Fractures in Imaging Logging by Computer
XUE Guo-xin, XIAO Li -chua
2003, 29(4): 1-3.
<Abstract>(35)
Abstract:
In recent years, imaging logging has become a research subject attracting wide attention. One of the key problem is how to identify the fractures in the imaging material of the wells. According that local fractures take the shape of plane, a fracture identifying algorithm was proposed. First, a line fitting most of the image pixels is determined. Second, the noise pixels far away from the line are deleted. Then the position of the line is calculated again. Repeat above process until the position of the line doesn’t change. This algorithm makes up the defection of traditional operation and has been used in a real problem, the results showed a good performance.
Experimental Study on the Controllable Starting System of Belt Conveyor
WU Hong-zhi , HOU You-fu , ZHANG Wei , CAI Mu-ying
2003, 29(4): 4-6.
<Abstract>(52)
Abstract:
Soft starting device is an important facility for improving belt conveyer’s running properties. In the paper, structure principle of the controllable starting system of belt conveyor was probed and studied, the control principle with PID algorithm and implement were also discussed.
Simulation Research in Microprocessor-based Relay Protection Based on Wavelet Transform
FU Zhou-xing, LI Sheng-jian
2003, 29(4): 6-8.
<Abstract>(41)
Abstract:
Based on basic theory of wavelet analysis and according to wave characteristics of fault phase’s current when power system was shorted, the paper introduced how to use mutant points of high frequency component after decomposition and reconstruction of wavelet to detect whether fault had happened. The simulation results showed the effectiveness of this algorithm, and microprocessor based protection circuit based on the algorithms in documents 1 was put forward. Finally, eliminating noises method of fault signal was analyzed.
Design of Information Fusion System for Coal Enterprise and Its Key Technology
WANG Hui-bin, YU Hong-zhe
2003, 29(4): 9-11.
<Abstract>(18)
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Extraction Method of Control Rules Based on Rough Set Theory
GAO Yun, HOU Yuan-bin
2003, 29(4): 12-14.
<Abstract>(35)
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The paper introduced the basic concepts of rough set theory, and the method of rules extraction from knowledge in terms of the relative importance of attribute was the emphasis of introduction, then discussed the extraction method of control rules combing with an example.
Study on Distinguishing of Informal-organizatioonn Based on the Theory of Graph
HAO Guo-sheng, WEI Yong-ping, GONG Dun-wei, LI Ming
2003, 29(4): 15-18.
<Abstract>(20)
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Reusing Technology in Development of Safety Management and Information System Used in Coal Mine
YUAN Zhao-shan, LI Rui, SUN Hui-jie
2003, 29(4): 18-20.
<Abstract>(47)
Abstract:
According to methodology of developing MIS system based on software component reusing, the paper discussed some key techniques in the safety management and information system of coal mine, such as proto type design of MIS component library, WWW publish of MIS component, automatic generation of user interface, etc. Combing with the practice of MIS system, this method was studied and used, which made the cost and period of system development be controlled obviously and the quality of system be improved. It had remark able effect.
PLC Reform of Electric Control System of Main Shaft Hoist in Laowuji Coal Mine
LI Ding-ming, YU Li-ping, GAO Jian-guo
2003, 29(4): 21-22.
<Abstract>(50)
Abstract:
The paper introduced characteristics of PLC reform scheme and system design of electric control system of main shaft hoist in Laowuji coal mine, which including unique switching mode between new and old system, slap up hardware configuration and design of system software with complete functions and perfect protection.
Analysis of Backup Speed Reducing Protection of Hoisst
LIU Xuan-wen, WANG Jiu-qua
2003, 29(4): 23-23.
<Abstract>(44)
Abstract:
Design of Monitoring Device of Pressure-preservatioon Performance of High-performance Single Hydraulic Support
ZHENG Feng-long, ZHENG Xiao-tian, KONG De-mao, HUANG Yu-ling
2003, 29(4): 24-26.
<Abstract>(42)
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Application of Performance of Minimum Induced-torque for Motor
GAO Xin , DAI Sheng-kui
2003, 29(4): 26-27.
<Abstract>(29)
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The paper mainly discussed application of performance of minimum induced torque of squirrel cage induction motors in project design. Then the practical analysis was given of varied ways to deal with motors minimum induced torque.
Distributed Intelligent Control System of Belt Conveyor Used in Mine
ZHU Long-ji , WANG Ru-lin
2003, 29(4): 28-30.
<Abstract>(37)
Abstract:
The paper described the requirements and existing problems of the belt conveyor control system in underground mine. A distributed intelligent control system based on CAN bus technology was designed. In this system, fuzzy control technology is applied successfully in automatic soft starting and motor’s power balance of belt conveyor, which can improve the automation level and control performance of belt conveyor.
Study on Mine Multimedia ISDN Network Structure and Its Routing Protocols
ZHANG Jian-ying, MA Shan-shan, LI Peng, LI Zhi-tao, CAO Guo-qing
2003, 29(4): 30-32.
<Abstract>(28)
Abstract:
The paper discussed the techniques of mine exploiting and the layout of communication lines in detail. Mine multimedia ISDN network structure was fiber hybrid access network. Based on the structure of mine ISDN, resource reserving protocol (RSVP) and its routing algorithm were analyzed.
Engineering Realization of Digital Bi-axes Stable Plat-form
LI You, ZHANG Bing, JIANG Jian-guo
2003, 29(4): 33-35.
<Abstract>(33)
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Applicatioon of Model KJ95 Safety Monitoring and Control System in Baodian Coal Mine
SUN Si-you
2003, 29(4): 35-37.
<Abstract>(30)
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An Economic and Applied Monitoring and Management System of Production Facilities
ZHANG Jian-sheng
2003, 29(4): 37-40.
<Abstract>(34)
Abstract:
The composing, working principle, main functions, software system and database system of an economic and applied monitoring and management system of production facilities for small sized coal mine were introduced in the paper.
Status Monitoring System of Air Compressor
YU Zi-jie, WU Chun-yan, QIAN Yi, CHEN Zhou-ling
2003, 29(4): 40-41.
<Abstract>(39)
Abstract:
The method and principle of status monitoring system of air compressor used in coal mine were introduced. The design of hardware and software were discussed in detail.
Debugging Problems of Electric Control System of DC Hoist Used in Coal Mine
QUAN Ji-na
2003, 29(4): 42-43.
<Abstract>(42)
Abstract:
The paper introduced some debugging problems and solving methods according to DC speed regulating system of reversible magnetic field and logical control without circular current.
Application of Frequency Converter in Speed Regulating System of AC Motor
CHEN Ya
2003, 29(4): 43-44.
<Abstract>(31)
Abstract:
Interference to Earth in Measure and Control Equipments Used in Mine and Its Restraii
TAO An-li, WU Jian, WANG Xia, BI Li-ju
2003, 29(4): 45-46.
<Abstract>(58)
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ASIC STEL-2000A Used in Direct-sequence Spread-spectrum System
WU Ming-jie, WANG Wei, LIU Rong-hua
2003, 29(4): 47-48.
<Abstract>(35)
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Design of Automation System of Power Dispatching in Coal Mine
NIE Pei-yu, WANG Yao
2003, 29(4): 49-51.
<Abstract>(22)
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Application of PLC in Hoisting Signal System and Function Expansion of the System
DU Rui
2003, 29(4): 51-53.
<Abstract>(33)
Abstract:
Electric Locomotive Transportation Signal System Underground Mine Controlled by PLC
ZHANG Rui-ju
2003, 29(4): 53-54.
<Abstract>(30)
Abstract:
A New Checking Method of Touching-on and Cutting-off on High Voltage DC Net
CUI Jian-ming, WANG Cheng-yi, XUE Qing-ju
2003, 29(4): 55-56.
<Abstract>(44)
Abstract:
A designing method of sensor used for monitoring touching on and cutting off on high voltage DC net in jail was introduced, the circuit design of sensor and its working pinciple were also introduced.
Application of Wireless Communication and Signal Control System for Shuttle Car in Changcun Coal Mine
ZHANG Ping-fang, DONG Jian-ming, WANG Rui-feng
2003, 29(4): 57-58.
<Abstract>(40)
Abstract:

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