2014 Vol. 40, No. 6

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Proposal of revision for safety monitoring and control and personnel position monitoring of Coal Mine Safety Regulatio
SUN Jiping
2014, 40(6): 1-7. doi: 10.13272/j.issn.1671-251x.2014.06.001
<Abstract>(68) <PDF>(5)
Abstract:
The paper put forward requirements of installation, use, maintenance and management of coal mine safety monitoring and control system. It proposed flameproof and intrinsically safe power supply is prohibited where power could be out off, adjustment which would cause power of local ventilators off should be done once every 6 months, and monitoring data must be uploaded to dispatching command center of mining bureau (company) or country (city). It put forward requirements of installation, use and management of underground personnel position monitoring system. It proposed devices should be equipped at each well head for personnel in or out to detect whether identification cards are normal as well as uniqueness detection based on face recognition or iris recognition, and personnel position monitoring substation should be installed at each well head for personnel in or out, exit and entrance in important area, restricted area, tunnel branch and other places.
Design of pressure monitoring system of hydraulic support based on wireless sensor network
WANG Tao, LIU Xiaowen, QIAO Xin, ZONG Xin
2014, 40(6): 7-10. doi: 10.13272/j.issn.1671-251x.2014.06.002
<Abstract>(110) <PDF>(5)
Abstract:
In view of wiring complexity and low reliability of data transmission existed in wired pressure monitoring system of hydraulic support, a pressure monitoring system of hydraulic support based on wireless sensor network was designed. The system takes CC2530 chip as core, collects pressure value of hydraulic support through data collection node. Routing node receives the collected pressure value and sends it to Sink node by multi-hop mode. The Sink node uploads the pressure value to upper computer through CAN bus, so as to realize pressure monitoring of hydraulic support in covered scope of wireless sensor network. The test result shows that the system can realize real-time and accurate monitoring of pressure data of underground hydraulic support.
Research of information system for coal weight measurement and quality analysis
LI Ping, WANG Yanwen
2014, 40(6): 11-13. doi: 10.13272/j.issn.1671-251x.2014.06.003
<Abstract>(101) <PDF>(8)
Abstract:
For new demands of users for coal weight measurement and quality analysis, the paper proposed information system for coal weight measurement and quality analysis, and described overall design ideas of the system; expounded key technologies and the implementation method from database design, design of algorithm to guarantee data integrity, development model of Web systems based on Ajax technology in details. The field application results show that the system can meet the needs of users at different levels, and has good stability and reliability.
Design of mine-used integrated data access gateway based on EPON technology
GUO Wei, TIAN Hongxia
2014, 40(6): 14-17. doi: 10.13272/j.issn.1671-251x.2014.06.004
<Abstract>(66) <PDF>(8)
Abstract:
On account of many data interfaces of coal mine monitoring and control system and it cannot achieve data unified communication and sharing at present, the paper designed a mine-used integrated data access gateway based on EPON technology combining with advantages of EPON technology. The gateway can realize data integrated access of different interfaces and data resources sharing of different systems. The actual test results show that backbone network communication rate of the gateway is 750 Mbit/s, transmission distance of backbone network is 15 km, and line redundancy switching time is less than 100 ms.
Design of underground lighting pre-warning system
CHEN Yan, LIU Zhiqiang
2014, 40(6): 18-20. doi: 10.13272/j.issn.1671-251x.2014.06.005
<Abstract>(61) <PDF>(6)
Abstract:
In order to exclude fault of underground fixed lighting system promptly, an underground lighting pre-warning system was designed, and designs of hardware circuit, user-defined network layer protocol and software system were expounded. The application results show that the system is convenient with high reliability and real-time performance.
Research of determination technologies of position and attitude of shearer on long-wall fully mechanized coal mining face
HAO Shangqing, WANG Shibo, XIE Guijun, GE Zhaoliang, LI Ang
2014, 40(6): 21-25. doi: 10.13272/j.issn.1671-251x.2014.06.006
<Abstract>(83) <PDF>(6)
Abstract:
The paper analyzed research status and existed problems of positioning technology of sensors of supports of shearer, positioning technology based on trackage odometer and autonomous positioning technology. It put forward research content of absolute positioning technology of shear in mining coal seam by taking absolute coordinate of the mining area as reference coordinate. It discussed application of the positioning technology of shearer in automation long-wall fully mechanized coal mining face.
Probe on concept of automatic fully-mechanized coal mining face
FU Guoju
2014, 40(6): 26-30. doi: 10.13272/j.issn.1671-251x.2014.06.007
<Abstract>(63) <PDF>(7)
Abstract:
Technology status of automatic fully-mechanized coal mining face in China was introduced, and fully-mechanized coal mining equipments were classified into production equipment, auxiliary equipment and monitoring and control system. In view of current confused naming situation of coal mining face in the industry, name of "automatic fully-mechanized coal mining face" was considered more appropriate. Technology of the automatic fully-mechanized coal mining face could be divided into four grades, namely partly automatic fully-mechanized coal mining face, semi-automatic fully-mechanized coal mining face, completely automatic fully-mechanized coal mining face and intelligently automatic fully-mechanized coal mining face, whose specific characteristics were given. Development approach of the automatic fully-mechanized coal mining face was introduced, and a view was pointed out it tally with actual situation better that considering automatic fully-mechanized coal mining face as a large machine which can automatically work, cut coal, support, load coal and transport coal.
Research of automation system integration of fully mechanized coal mining face
XIA Huguo, SONG Weijun, YANG Xianguo
2014, 40(6): 31-33. doi: 10.13272/j.issn.1671-251x.2014.06.008
<Abstract>(90) <PDF>(8)
Abstract:
The paper analyzed functions and problems of automation system of fully mechanized coal mining face, and studied automation integration solutions of fully mechanized coal mining face, which had guiding significance for implementation of automation of fully mechanized coal mining face at the present stage.
Research of automatic control technology of dense medium coal preparatio
GUO Nan, CHEN Zhen, LUO Xuhui
2014, 40(6): 34-36. doi: 10.13272/j.issn.1671-251x.2014.06.009
<Abstract>(132) <PDF>(5)
Abstract:
The paper introduced existing status and characteristics of automatic control technology of dense medium coal preparation, outlined several systems included in automatic control of dense medium coal preparation and common instruments used in dense medium coal preparation process, and finally analyzed problems existed in dense medium coal preparation automatic control.
Study on concept and key technologies of smart mine
WANG Li
2014, 40(6): 37-41.
<Abstract>(52) <PDF>(14)
Abstract:
The paper summarized concept and characteristics of smart mine based on status of mine informatization construction in China and abroad, and introduced key technologies of smart mine, including spatial information technology, combination of network and cloud computing, mine technical norms and standards, data mining technology, 3D simulation and virtual reality, intelligent mining and service technology and safety guarantee system. It also gave research significance of smart mine.
Research of gas movement law in goaf with parallel double U-shape ventilation mode
HAO Yabing, WANG Fei, WANG Xing, LIU Xiang
2014, 40(6): 41-44. doi: 10.13272/j.issn.1671-251x.2014.06.011
<Abstract>(38) <PDF>(2)
Abstract:
In order to analyze and master gas distribution and movement law in goaf with parallel double U-shape ventilation mode, a CFD model was established according to characteristics of parallel double U-shape ventilation system of fully mechanized coal mining face at a coal mine, and the model was used to do numerical simulation of goaf gas movement law with parallel double U-shape ventilation mode. The analysis results show that parallel double U-shape ventilation mode applied in fully mechanized coal mining face can reduce gas flow of goaf and upper corner because most of goaf gas is discharged into auxiliary return airway with air leakage due to action of connection airway at goaf upper corner, so as to solve problem of gas overrun on fully mechanized coal mining face effectively.
Research of hierarchical multi-sensor data fusion model for coal mine safety monitoring
LIU Kai, GUO Yongyi, WU Shiyue
2014, 40(6): 45-50. doi: 10.13272/j.issn.1671-251x.2014.06.012
<Abstract>(25) <PDF>(2)
Abstract:
A hierarchical multi-sensor data fusion model was proposed in order to improve precision of early warning of multi-sensor detection system and reduce rate of unknowing or false judgement of the state in monitoring process of the multi-sensor. The model uses hierarchical analysis method to determine membership degree and the corresponding weights in data level, uses fuzzy evaluation method to fuse data in feature level, and adopts D-S evidence theory to fuse data in decision level. It can calculate with different algorithms according to kind of the input fusion data. The experimental results show that the model can increase membership grade of security, slight, dangerous states 8.3%, 6%, 29.2% compared with initial data, and verify the effectiveness of the model.
Research of vibration fault diagnosis of underground belt conveyor gear reducer
XUE Guanghui, ZHANG Jun, JI Xiaodong, ZHAO Xinying
2014, 40(6): 51-53. doi: 10.13272/j.issn.1671-251x.2014.06.013
<Abstract>(40) <PDF>(5)
Abstract:
Vibration monitoring test of underground belt conveyor gear reducer was conducted by use of vibration recorder. Analysis of changing trend and power spectrum of time-domain characteristic index of on-site vibration data indicates that input shaft of the gear reduer has severe wear and gear tooth breakage.Overhaul results verify correctness of the above analysis and validity of the data sampled by the recorder.
A fault line selection method of small current grounding system based on wavelet packet and Bayes theory
WANG Xiaowei, GAO Jie, WEI Xiangxiang, HOU Yaxiao
2014, 40(6): 54-59. doi: 10.13272/j.issn.1671-251x.2014.06.014
<Abstract>(46) <PDF>(2)
Abstract:
In view of problems of complex fault situation and unobvious characteristics of fault signal of fault line selection method of existing small current grounding system, a fault line selection method of small current grounding system based on wavelet packet and Bayes theory was proposed. Firstly, the method divides faults of small current grounding system into strong fault mode, medium fault mode and weak fault mode according to transition resistance, and constructs the Bayes classifier. Then, in extraction of fault features, it selects characteristic frequency band according to the maximum energy by db wavelet packet, and inputs the characteristic frequency band of every line into the classifier to judge fault type after training the Bayes classifier. Finally, it votes the output results of the three-classifier by majority principle, and acquires the fault line selection result. The simulation results show that the method has high accurate rate of line selection.
A three-phase multilevel converter with multi-winding medium-frequency transformer
ZHANG Yulei, ZHANG Yuxiang, GUO Mi
2014, 40(6): 59-63. doi: 10.13272/j.issn.1671-251x.2014.06.015
<Abstract>(32) <PDF>(2)
Abstract:
In view of problems of unbalanced capacitor voltage, or big volume and high cost of phase-shifting transformer which provides DC power existed in traditional multilevel converter, the paper proposed a three-phase multilevel converter based on cascaded H-bridge and multi-winding medium-frequency transformer. It introduced circuit structure and working principle of the converter, and analyzed control method of the converter in details. The simulation results show that the converter has stable static characteristics, good dynamic characteristics and little current harmonic.
Research of optimized sorting algorithm of capacitor voltage for MMC
SONG Pinggang, JIANG Lang, LI Yunfeng, DUAN Chengting
2014, 40(6): 64-67. doi: 10.13272/j.issn.1671-251x.2014.06.016
<Abstract>(71) <PDF>(2)
Abstract:
The paper researched primary cause of increasing of switching frequency of modular multilevel converter led by traditional capacitor voltage sorting algorithm according to operation principle of the converter. It proposed an improved sorting algorithm of capacitor voltage in order to decrease the switching frequency and improve system running efficiency. The algorithm optimizes and improves the traditional sorting algorithm, gives three voltage references, and compares switched capacitor voltage in sub-module with the references, so as to judge whether the switched sub-module is going to keep running in the next time. It constructed a MMC simulation model contained 60 sub-modules with the optimized algorithm in Matlab. The simulation results verify that the optimized algorithm can significantly reduce switching frequency of power devices, and decrease power consumption of the converter.
Research of direct torque control strategy of permanent magnet synchronous motor
ZHANG Qiang, HAN Rucheng
2014, 40(6): 68-72. doi: 10.13272/j.issn.1671-251x.2014.06.017
<Abstract>(63) <PDF>(3)
Abstract:
Direct torque control strategy of permanent magnet synchronous motor based on speed-sensorless technology was studied, and space vector pulse width modulation technique was applied in switching sequence selection of voltage source inverter. Delay of the pulse width modulation was eliminated through controlling of flux and torque by hysteresis controller, and harmonic suppression of voltage and current were achieved by use of low-pass filter. The simulation results show that actual speed of motor is similar to predicted speed under different torque responses after appling the strategy, the time needed by the motor to accelerate to desired reference time is very short, and the tracking is also good.
A fault diagnosis method of power converter of switched reluctance motor
SUN Guanqun, LI Mei
2014, 40(6): 72-76. doi: 10.13272/j.issn.1671-251x.2014.06.018
<Abstract>(40) <PDF>(2)
Abstract:
For low reliability of existing fault diagnosis method of power converter of switched reluctance motor, the paper proposed a new type of fault diagnosis method of power tube. The new method takes main circuit of asymmetric half-bridge power converter as study object, and two kinds of common faults of open circuit and short circuit of power tube as diagnosis objects. It determines fault by comparing estimate value and actual value of bus current, achieves identification of fault phase combining with winding current of fault phase, and determines fault point by interrupting test if necessary. The paper selects conditions which are difficult to achieve fault diagnosis of motor operation with no-load, low-speed and high-speed for experiment and analysis, and the results indicate that the proposed method can complete accurate determination of fault type and location of fault point.
Design of passive environmental safety monitoring system of underground coal mine
HU Xingzhi, LI Xuezhe, YANG Xingbo, GAO Xue
2014, 40(6): 77-80. doi: 10.13272/j.issn.1671-251x.2014.06.019
<Abstract>(38) <PDF>(2)
Abstract:
The paper introduced a new design scheme of passive environmental safety monitoring system of underground coal mine based on ZigBee wireless networks and sensor detecting technique. The system places mobile detecting devices with sensors on miner's hat, achieves passive environmental monitoring and wireless information transmission through wireless sensor networks, greatly increases monitoring flexibility, and solves problem of dead space of monitoring.
Design of wireless monitoring system of mine exploration eye
SHI Tailu, FANG Mingliang
2014, 40(6): 80-82. doi: 10.13272/j.issn.1671-251x.2014.06.020
<Abstract>(47) <PDF>(3)
Abstract:
In order to meet requirements of mine exploration eye monitoring systems and needs of monitoring networking, the paper designed wireless monitoring system of mine exploration eye, gave overall structure of the system, and focused on communications program of master station and PC monitoring software design. The test results show that the system is stable and has good practical value.
Design of coal mine safety production monitoring system for teaching and experiment
ZHANG Tao
2014, 40(6): 83-86. doi: 10.13272/j.issn.1671-251x.2014.06.021
<Abstract>(37) <PDF>(3)
Abstract:
In view of actual situation of expensive of coal mine safety production monitoring system for teaching and experiment, a new coal mine safety production monitoring system for teaching and experiment was designed in order to meet the needs of teaching and scientific research. Design principle, designs of hardware and software of the system were introduced. The system can provide a very useful practice environment for teachers and students in study and research of coal mine safety production.
Mobile office system of coal mine
DU Anping
2014, 40(6): 86-89. doi: 10.13272/j.issn.1671-251x.2014.06.022
<Abstract>(59) <PDF>(3)
Abstract:
Traditional meeting, telephone or paper document cannot meet requirements of coal mine informatization. The paper introduced a mobile office system of coal mine from views of development scheme, function modules and key technologies. Coal mine personnels can do usual office work through the system such as data inquiry about six systems of coal mine safety production, daily communication, information diffusion and obtainment and so on. The application shows construction of the system makes coal mine personnels know situation of safety production at the first time and improves timeliness and correctness of information management.
Design of remote measurement and control system of mine water source well
WANG Jixing, LI Fengxia, JIN Baoquan
2014, 40(6): 90-92. doi: 10.13272/j.issn.1671-251x.2014.06.023
<Abstract>(42) <PDF>(4)
Abstract:
In view of problems of dispersed distribution and difficult centralized control of mine water source well, the paper designed remote measurement and control system of mine water source well based on KingView. The system realizes local control of water source well water pump of water supply system and remote network control, achieves data storage and data query by use of SQL Server database technology, and realizes water-saving measurement, which improves safety and reliability of operation of water supply system.
Design of integrated patrolling system for electromechanical equipment based on Internet of things
LYU Weiyu
2014, 40(6): 93-95. doi: 10.13272/j.issn.1671-251x.2014.06.024
<Abstract>(50) <PDF>(3)
Abstract:
In view of problems of missing inspection, false inspection and lack of objective and comprehensive inspection existed in current maintenance of coal mine electromechanical equipment, an integrated patrolling system for electromechanical equipment based on Internet of things was designed. With basic attribute database of electromechanical equipment, the system combines off-line patrolling with on-line monitoring, and takes detection result of human experience into objective monitoring information to make comprehensive judgment, so as to improve accuracy rate of fault diagnosis of electromechanical equipment. The application result shows that the system can provide accurate and reliable basis for maintenance of coal mine equipment, and improve management level of coal mine equipment.
Research of coal mine storage management system based on Internet of things
DING Congshi, XU Xiliang
2014, 40(6): 96-99. doi: 10.13272/j.issn.1671-251x.2014.06.025
<Abstract>(41) <PDF>(2)
Abstract:
In view of problems of long time-consuming, low efficiency and high cost existed in traditional coal mine storage management mode, a coal mine storage management system based on Internet of things was designed. Tag management for material is achieved by use of Internet of things technology, so as to realize functions of perception, positioning, identification and measuring for material. Seamless connection with ERP system is achieved by use of Web Service technology, so the system realizes information sharing with the ERP system and real-time interaction of material data. It further improves management level of coal mine storage.
Design of frequency modulation transceiver based on software defined radio platform
GU Lingling, LI Shiyin, LI Xi
2014, 40(6): 99-102. doi: 10.13272/j.issn.1671-251x.2014.06.026
<Abstract>(31) <PDF>(3)
Abstract:
The paper introduced small software defined radio platform based on DSP/FPGA, designed frequency modulation transceiver based on the platform using modular design approach, and expounded achievements of modulation and demodulation algorithms. The test results show that frequency modulation transceiver based on software defined radio platform can achieve desired functions of transmitting and receiving, and has advantages of easy to deploy, expand and upgrade.
Design of wirerope tension monitoring system of mine hoist
SHI Tongjun, WANG Peng, WANG Bo
2014, 40(6): 103-105. doi: 10.13272/j.issn.1671-251x.2014.06.027
<Abstract>(58) <PDF>(4)
Abstract:
In view of problems of overload and unbalanced tension of wirerope existed in mine hoist, a wirerope tension monitoring system of mine hoist was designed. The system uses pressure sensor to collect wirerope tension, collected data is transmitted through wireless communication after processing, and signal receive device receives and uploads the data to upper computer through RS232 for display, so as to realize real-time and reliable monitoring of wirerope tension. The test result verifies feasibility of the system.
Probe on temperature rise test of mine-used switch devices
LI Ya
2014, 40(6): 106-109. doi: 10.13272/j.issn.1671-251x.2014.06.028
<Abstract>(77) <PDF>(5)
Abstract:
Combining with related standards and actual work experience, the paper introduced temperature rise test method of circuit for mine-used switch electrical products, connecting wire method of temperature rise test, temperature rise test methods for different working systems, expounded measuring method of surface temperature of electrical components and temperature rise of coil. It summarized notices before temperature rise test and during the experiment process. The paper has certain guiding significance for temperature rise test of mine-used switch devices in practical work.
Intelligent fault detection and analysis system of coal mine power based on TD-SCDMA
PENG Yu, WANG Anyi
2014, 40(6): 110-113. doi: 10.13272/j.issn.1671-251x.2014.06.029
<Abstract>(33) <PDF>(4)
Abstract:
In view of problem that fault of underground power supply equipment leads great hidden danger to coal mine safety production, an intelligent fault detection and analysis system of coal mine power based on TD-SCDMA technology was proposed. The system collects each segment bus voltage, each branch current, power, state of breaker and fault information in real-time through detection and collection system of power supply, then transmits running state, running parameters, fault information of coal mine power supply and distribution system to intelligent power fault analysis system through TD-SCDMA/industrial Ethernet support system, so as to complete information processing and analysis and fault diagnosis and processing of coal mine power supply and distribution system. The application result shows that the system improves reliability of power supply, and provides guarantee for coal mine safety production.
Design of temperature measuring circuit based on Pt100 platinum thermistor
YU Shuohang, LI Jianxin, HE Lin
2014, 40(6): 113-115. doi: 10.13272/j.issn.1671-251x.2014.06.030
<Abstract>(63) <PDF>(7)
Abstract:
In view of problems of measuring error caused by line impedance and complex circuit connection existed in traditional temperature measuring method of platinum thermistor, a temperature measuring circuit based on Pt100 platinum thermistor was designed. Hardware design and parameter calculation of the circuit were introduced. Differential method is used to eliminate measuring deviation caused by line impedance, and reference voltage is changed to adjust temperature measuring range. The simulation result verifies rationality and reliability of the circuit design.

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