2015 Vol. 41, No. 12

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Management system of multi-source spatial data in open pit coal mine based on GIS
XIANG Shiyao, CHEN Yijin, XU Dongjing
2015, 41(12): 1-4. doi: 10.13272/j.issn.1671-251x.2015.12.001
<Abstract>(72) <PDF>(7)
Abstract:
According to production and operation characteristics of open pit coal mine, seven kinds of multi-source heterogeneous spatial data consisting of vector data, remote sensing image data, CAD data, three-dimensional model data, trucks route data, marking location data and monitoring location data of mine area were selected. The mining spatial database was built, and management system of multi-source spatial data in open pit coal mine was designed and developed combing with GIS component development and visualization technology of spatial information to realize the visual-integrated management of mining spatial data. The practical application shows that the system has characteristics of convenient data storage and management and high data utilization rate, which can provide convenience and help for mine area management and production.
Application of multi-sensor data fusion in mine safety monitoring
ZHANG Pengpeng, YU Along, SUN Shiyu, XU Dongping
2015, 41(12): 5-8. doi: 10.13272/j.issn.1671-251x.2015.12.002
<Abstract>(108) <PDF>(16)
Abstract:
In view of problems of inaccurate mine safety monitoring data and unreliable safety evaluation, a two-level data fusion method based on multi-sensor data fusion was proposed. The first level fusion uses batch estimation algorithm to process single sensor data in order to improve accuracy of data collection, then adopts adaptive weighting algorithm to process similar multi-sensor data in order to obtain fused value of mine environmental parameters. The second level fusion makes grey correlation degree analysis between the fused value of mine environmental parameters and mine safety standard feature vector, so as to get consistent estimation of mine safety status. The example verifies feasibility and effectiveness of the method.
Design of online pressure monitoring system of underground hydraulic support
HUANG Danqun
2015, 41(12): 9-11. doi: 10.13272/j.issn.1671-251x.2015.12.003
<Abstract>(57) <PDF>(6)
Abstract:
For problems of complex wiring, small network scale and short transmission distance of existing pressure monitoring system of coal mine underground hydraulic support, an online pressure monitoring system of underground hydraulic support was designed by use of WaveMesh wireless ad hoc network technology. The system collects pressure data of hydraulic support through wireless pressure sensor. Wireless monitoring substation receives the pressure data wirelessly and sends it to ground monitoring host through RS485 bus and optical fiber ring network. The application shows that the system runs stably and reliably, which can realize real-time and accurate monitoring of underground hydraulic support pressure.
Analysis of power source of permanent magnetic controller for mine-used high-voltage switch and its desig
YANG Shengyua
2015, 41(12): 12-15. doi: 10.13272/j.issn.1671-251x.2015.12.004
<Abstract>(66) <PDF>(9)
Abstract:
Existing status of power source of permanent magnetic controller for mine-used high-voltage switch was analyzed with a conclusion that existing products were poor in reliability, large in electromagnetic interference and long in action time. A design scheme of power source of permanent magnetic controller for mine-used high-voltage switch was proposed by use of active power factor correction technology as well as a design example based on ML4824. The design example has actual power factor of 0.98, output ripple wave voltage of 2.4 V and a little of harmonic wave interference. The design example shortens charging time of electric capacity when it is used in permanent magnetic controller for mine-used high-voltage switch, and makes breaking time of permanent magnetic controller achieve the same level of ones on the ground.
Application research of low-frequency wake-up technology in personnel positioning system
WANG Shuqiang, ZHANG Ping
2015, 41(12): 16-19. doi: 10.13272/j.issn.1671-251x.2015.12.005
<Abstract>(62) <PDF>(5)
Abstract:
In view of problem of short service time and great maintenance workload of identification card battery used in current personnel positioning system, the paper proposed to apply low-frequency wake-up technology to reduce battery operating time, thereby extend battery life, namely set dormant state for identification card when the miners are outside of the mine, and use low-frequency signal receiver to wake up the identification card when the miners go down the mine. The test results show that the use of low-frequency wake-up technology can greatly improve battery life of identification card, when the signal transmission period is 1-3 s, the battery life is extended to more than 2.7 times of the original, and the improving effect is better as the transmission period becomes shorter.
An obtaining method of hostile signal in illegal occupation block in signal concentrating and interlocking system
XU Min, LUO Minghua
2015, 41(12): 19-21. doi: 10.13272/j.issn.1671-251x.2015.12.006
<Abstract>(73) <PDF>(6)
Abstract:
For incorrect single interlocking problem in mine signal concentrating and interlocking system caused by manually setting interlocking conditions, an obtaining method of hostile signal in illegal occupation block was introduced. On the basis of understanding determine conditions of hostile route, two-way link list is used to express route element, so as to generate route list. Then the route list is searched to get the hostile signal. The practical result shows that the method can correctly get hostile signals in illegal occupation block in mine signal concentrating and interlocking system, improve interlocking accuracy and reduce labor intensity.
Application of 3G network optimization technique in mine wireless communication system
LUO Yuanlong, WANG Yan
2015, 41(12): 22-24. doi: 10.13272/j.issn.1671-251x.2015.12.007
<Abstract>(60) <PDF>(3)
Abstract:
In order to fully utilize existing wireless network resources, improve equipment utilization, and ensure communication quality, application of 3G network optimization technique in mine wireless communication system was described taking wireless communication system of a large mine as an example. Network optimization was carried out from two aspects of coverage holes and pilot pollution. After network optimization, signal coverage has been greatly improved and pilot pollution area has been eliminated substantially.
Research of resource allocation of coal mine production logistics system based on cooperative game
WANG Jinfeng, DU Xueke, ZHAI Xueqi, FENG Lijie
2015, 41(12): 25-30. doi: 10.13272/j.issn.1671-251x.2015.12.008
<Abstract>(130) <PDF>(4)
Abstract:
According to complex and changeable status of coal mine production logistics system, a resource allocation model of coal mine production logistics system was constructed by using cooperative games and choosing safety and efficiency subsystems as two sides of the game. The model uses regression analysis method to fit function relationship among resource investment and safety level and efficiency level, and uses cooperative game to coordinate the allocation of resources between safety and efficiency subsystems. The practical application results show that using cooperative game theory and Nash solution, the model can allocate resources rationally from aspects of safety and efficiency in situations of certain enterprise's resource input, and can control security level of coal mine production logistics system in the best range, meanwhile ensure the efficiency level is the optimal, which can provide scientific theory basis for safe and efficient operation of coal mine production logistics system.
An image enhancement algorithm for coal mine underground
CHENG Deqiang, ZHENG Zhen, JIANG Hailong
2015, 41(12): 31-34. doi: 10.13272/j.issn.1671-251x.2015.12.009
<Abstract>(87) <PDF>(4)
Abstract:
In view of low contrast ratio and view effect of monitoring images in coal mine underground, a single scale Retinex algorithm based on guided filtering was proposed for image enhancement of coal mine underground. The guided filtering, which can protect edge and make image smooth, is used for illumination estimation and convolution operation with original images, so as to get reflection component which reflects properties of the original images. For reflection component by anti-logarithm transformation, an improved local contrast enhancement method is used to improve contrast ratio of dark parts in the reflection image processed by antilogarithm operation, so as to get enhanced image finally. The experimental results show that the algorithm has better effect in promoting contrast ratio, enhancing details and denoising.
Research on repeating coil of asymmetric magnetic coupling resonant wireless power transmission system
TIAN Zijian, DU Xinxin, FAN Jing, CAO Yangyang
2015, 41(12): 35-39. doi: 10.13272/j.issn.1671-251x.2015.12.010
<Abstract>(46) <PDF>(4)
Abstract:
For asymmetric transmitting coil and receiving coil of magnetic coupling resonant wireless power transmission system in practical application and low system transmission efficiency, an asymmetric system model was built whose transmitting coil was larger than receiving coil. A method for improving system transmission efficiency was proposed which was by increasing repeating coil between the transmitting coil and the receiving coil. A structure was proposed, namely the repeating coil and the transmitting coil were coaxial and in the same plane. The simulation was done to compare the method with a method of increasing turn number of the transmitter coil about influence on system transmission efficiency. The simulation results show that the former can improve the transmission efficiency more efficiently with a smaller volume. Experimental platform of the system was built in laboratory to verify correctness of theoretical analysis and simulation.
Design of underground precise positioning service system based on CSS
LIU Xiaoyang, HE Yu
2015, 41(12): 40-44. doi: 10.13272/j.issn.1671-251x.2015.12.011
<Abstract>(45) <PDF>(2)
Abstract:
In view of problem of low positioning accuracy of wireless sensor network positioning system，a design scheme of underground precise positioning service system based on CSS was presented．The hardware structure, CSS precise positioning algorithm and specific work process of the system were introduced．The system uses CSS precise positioning technology based on TDOA, and can accurately locate the position of terminal，and send data via WCDMA 3G communication module to cloud computing services platform，so that users can use any Web browser platform to obtain the terminal location information. The simulation experiment results indicate that the system can improve positioning accuracy greatly and reduces error compared with other underground positioning systems.
Development status and tendency of automatic identification technologies of coal-rock interface
WU Jieping, LI Guohui
2015, 41(12): 44-49. doi: 10.13272/j.issn.1671-251x.2015.12.012
<Abstract>(58) <PDF>(4)
Abstract:
On the basic of identification accuracy, identification speed and application scope of automatic identification technologies of coal-rock interface, some feature types of the technologies were analyzed; development status, characteristics and problems of non-contact and contact automatic identification technologies of coal-rock interface were discussed. Development tendency of automatic identification technologies of coal-rock interface were put forward. The paper provides new idea for further research of automatic identification technologies of coal-rock interface.
Discussion on construction of test capabilities for safety approval of underground high-voltage power supply and consumption equipments
CHEN Zhao
2015, 41(12): 50-54. doi: 10.13272/j.issn.1671-251x.2015.12.013
<Abstract>(41) <PDF>(4)
Abstract:
Present status of high-voltage power supply and consumption equipments used in coal mine underground were introduced，including their technical characteristics and safety status and test capabilities of their safety approval. The main problems exited in development of test ability of the safety approval were also analyzed. Combining with the project of security approval analysis and verification laboratory for coal mine high-voltage power supply and consumption system, the construction contents were discussed from high capacity testing power supply, switching apparatus, frequency conversion electric drive system, reactive power compensation and power grid parameter simulation.
Research of AC voltage step experiment instrument for mine-used power supply testing
WANG Haichao
2015, 41(12): 55-58. doi: 10.13272/j.issn.1671-251x.2015.12.014
<Abstract>(23) <PDF>(1)
Abstract:

An AC voltage step experiment instrument for mine-used power supply testing was introduced. The instrument uses touch screen as window of command input and voltage indicator, Modbus-RTU as communication protocol, and single chip microcomputer to control AC solid-state relay to realize step among different voltages. Load test result shows that under 127 V voltage level, the instrument can do step voltage experiment safely and reliably, with the max load current of more than 5 A and step time of less than 50 ms.
Design of remote monitoring system of mine ventilator
WANG Chun, XU Wenna, LIAO Yinghua
2015, 41(12): 58-61. doi: 10.13272/j.issn.1671-251x.2015.12.015
<Abstract>(33) <PDF>(9)
Abstract:
In view of difficult wiring and poor scalability of traditional monitoring system of mine ventilator, a remote monitoring system of mine ventilator was designed applying ZigBee wireless communication technology. Terminal node sensor transmits detected signal to coordinator node through ZigBee wireless communication, and then the signal was sent to PLC and the monitoring center for processing via the serial port. The simulation results show that the system achieves real-time detection of current, voltage, air speed and pressure of ventilator, it avoids a lot of wiring, and has high reliability and good real time performance.
Design of testing and aging system for mine-used DC power supply board
CHANG Liming
2015, 41(12): 62-64. doi: 10.13272/j.issn.1671-251x.2015.12.016
<Abstract>(58) <PDF>(5)
Abstract:
In view of problem of cumbersome test and time-consuming aging process of mine-used DC power supply board, a testing and aging system for power supply board was designed. The system achieves automatic detection of assembly unit of the power supply board, easies the process of testing and aging, and improves production efficiency. It uses method of increasing output current and reloading load resistance to shorten aging period from 6 d to 4 d, and uses compact three-dimensional cabinet structure to greatly reduce the space occupied during the aging process.
Management and control system of mine truck loading and transportation based on information fusio
WU Hui
2015, 41(12): 64-67. doi: 10.13272/j.issn.1671-251x.2015.12.017
<Abstract>(27) <PDF>(3)
Abstract:
In view of problems that vehicle condition is complex, process is cumbersome among many departments, and loading data is across multiple systems in process of mine truck loading and transportation, a management and control system of mine truck loading and transportation based on information fusion was proposed taking database of loading system as the foundation. The architecture and information fusion of production data of the system were introduced. The actual application shows that the system can real-timely track loading and transportation process of mine truck, which can realize functions such as trucks management, production data transmission, access to the application of automation equipment, and has high loading efficiency.
Detection method of conveyor belt longitudinal tear based on Hough transform
WANG Xiaochao, QIAO Tiezhu
2015, 41(12): 68-70. doi: 10.13272/j.issn.1671-251x.2015.12.018
<Abstract>(39) <PDF>(7)
Abstract:
In view of problems of low sensitivity, inconvenient operation and non-visualization of existing detection methods of conveyor belt longitudinal tear, a detection method of conveyor belt longitudinal tear based on Hough transform was proposed. Lower surface image of conveyor belt is collected in real-time by use of CCD with line light source as auxiliary irradiation, and slope difference characteristics of the image are extracted through Hough transform, so as to determine whether longitudinal tear of conveyor belt happens. The test result verifies effectiveness of the method.
Goal driven optimization design of flameproof shell based on ANSYS Workbench
WANG Bo, SONG Yubin, WANG Xin
2015, 41(12): 70-72. doi: 10.13272/j.issn.1671-251x.2015.12.019
<Abstract>(46) <PDF>(4)
Abstract:
In order to design flameproof shell of coal mine equipment with the optimum wall thickness more efficiently, three-dimensional parametric model of the flameproof shell was established and variable need to be optimized was set by use of Pro/E three-dimensional design software, finite element analysis of the model and goal driven optimization analysis of the variable were performed by use of ANSYS Workbench finite element analysis software, and the optimum wall thickness was obtained which meet requirement of flameproof and the lightest shell weight, so as to save material and reduce design cost.
Drainage control system of coal mine based on integrated control box
JIANG Wei
2015, 41(12): 73-74. doi: 10.13272/j.issn.1671-251x.2015.12.020
<Abstract>(46) <PDF>(2)
Abstract:
A drainage control system of coal mine based on integrated control box was introduced and design schemes of system structure, integrated control box and system software were given. The system has been applied in a coal mine resulting in high running efficiency, small strength of system construction and maintenance and good effect.

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