2015 Vol. 41, No. 9

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Characteristic analysis and preprocessing of mine gas monitoring data
DONG Dingwen, QU Shijia, WANG Honggang
2015, 41(9): 1-4. doi: 10.13272/j.issn.1671-251x.2015.09.001
<Abstract>(85) <PDF>(7)
Abstract:
In view of characteristics of abnormal data, missing data and noisy data of mine gas monitoring data, a preprocessing method of gas monitoring data was proposed. Abnormal data is replaced by use of moving average line processing method or auto regressive model processing method, missing data is filled by employing cubic exponential smoothing method and data denoising is processed though wavelet soft threshold method. The case analysis shows that the method can eliminate interference of abnormal data, ensure integrity of monitoring data and smooth characteristic curve of monitoring data without changing statistical characteristics of gas monitoring data.
Research of mine-used radar material level monitoring device
YE Jinjiao
2015, 41(9): 5-7. doi: 10.13272/j.issn.1671-251x.2015.09.002
<Abstract>(76) <PDF>(8)
Abstract:
In view of shortcomings of bad anti-interference and low reliability existed in ultrasonic measurement method for coal level measurement, a mine-used radar material level monitoring device was designed. The device transmits high frequency electromagnetic wave to the measured object by material level sensor and processes reflected signal by use of noise threshold processing technology, filtering processing technology and false echo processing technology, so as to realize real-time and accurate measurement of material level. The testing results show that the device has high reliability, small measurement error and strong anti-interference.
Coal-rock interface detection method using ground penetrating radar and its experiment
LI Liang, WANG Xin, HU Kexiang, ZHAO Duan, DING Enjie
2015, 41(9): 8-11. doi: 10.13272/j.issn.1671-251x.2015.09.003
<Abstract>(108) <PDF>(8)
Abstract:
Coal-rock interface detection principle using ground penetrating radar was introduced. Feasibility and practicability of using ground penetrating radar technology to detect coal-rock interface was discussed. The radar antenna with frequency of 200 MHz-1 GHz was proved to realize most of coal-rock interface detection through theoretical analysis. The experiment was taken by use of LTD-2100 ground penetrating radar in Guozhuang Coal Mine. The experimental results show that radar antenna with frequency of 400 MHz can realize detection of gas coal-sandstone interface with a small error.
Design of a new type of intelligent lamp charging cabinet
HUANG Hesong, WEI Guozhao, LIAO Yubo, ZHANG Renyuan, WEI Lanlei
2015, 41(9): 11-14. doi: 10.13272/j.issn.1671-251x.2015.09.004
<Abstract>(93) <PDF>(10)
Abstract:
In view of problems of multi-type of battery cell of miner's lamp and multi-method of charging, an intelligent charging cabinet compatible with variety of miner's lamp was designed. The intelligent charging cabinet can accurately control charging voltage and current of manganese lithium batteries, lithium iron phosphate batteries, nickel metal hydride batteries and lead-acid battery, it also achieves functions of detection and display of the charging status, lamp in position, battery fault, and rapid identification and maintenance of health status of battery.
Design of a new type of dynamic quantitative loading system of wheel loader
ZONG Weilin, LI Jia, ZHANG Yajian, SHANG Yingmin, WANG Yechao, PEI Yi, CHEN Detong
2015, 41(9): 15-18. doi: 10.13272/j.issn.1671-251x.2015.09.005
<Abstract>(67) <PDF>(7)
Abstract:
For the low efficient of existing coal shipment method, a new type of dynamic quantitative loading system of wheel loader was designed according to actual situation of coal enterprises. The hardware, software designs and data processing method of the system were introduced. The system does't need stop wheel loader to meter in midway, and coal weight could be weighed and shown on the screen during the loading operation. Multi-machine cooperative loading could be implemented by using configuration software, and the loading efficiency of loading machine was improved.
Design of optical fiber transmission system of analog signal under microwave drying coal environment
GAO Xianru, ZHOU Xinzhi
2015, 41(9): 18-21. doi: 10.13272/j.issn.1671-251x.2015.09.006
<Abstract>(48) <PDF>(5)
Abstract:
Under high-power microwave environment, transmission of electrical signals could easily be affected by electromagnetic interference and lead to loss of transmission accuracy. In order to solve the problem, an optical fiber transmission system of analog signal under microwave drying coal environment was designed. The system is based on V/F transform, takes optical fiber as transmission channels and uses FPGA as the frequency meter, ARM as data processing controller, can effectively restrain electromagnetic interference and improve transmission accuracy. The experimental results show that the system has advantages of good anti-interference ability, far transmission distance, high stability, simple circuit structure, and transmission error of small analog signal is less than 0.1%. The system provides a good solution for analog signal transmission under complex environment.
Design of control system of mine-used switched reluctance electric locomotive
LI Ruiji
2015, 41(9): 22-25. doi: 10.13272/j.issn.1671-251x.2015.09.007
<Abstract>(59) <PDF>(4)
Abstract:
In order to improve performance of battery electric locomotive in coal mine, reduce energy consumption and improve work efficiency, a kind of control system of mine-used switched reluctance electric locomotive based on ARM was designed. The system uses control mode combing angular position control and chopped voltage control, adopts control strategy of torque distribution function, and achieves control of the battery motor vehicle combined with speed and current dual closed-loop system. The experimental results show that the system has small torque ripple, high efficiency, strong robustness and good performance of speed adjustment.
Experimental research of surface potential of coal containing gas under cyclic loading
LIU Yongjie, CHEN Peng, ZHANG Liqiang, LI Siyao
2015, 41(9): 26-30. doi: 10.13272/j.issn.1671-251x.2015.09.008
<Abstract>(64) <PDF>(2)
Abstract:
In order to research influence of gas on surface potential of coal containing gas under cyclic loading, an experimental system about surface potential of coal containing gas under cyclic loading was built. Characteristic laws of surface potential signals were tested and analyzed in coal destruction process by cyclic loading under different gas pressure, and mechanism of loaded destruction of coal containing gas was discussed. The experimental results show that coal containing gas can produce surface potential signal in loaded destruction process, and the surface potential signal has some relevance with stress and gas change. For the same type of coal samples, stress level under the maximum surface potential decreases as gas pressure increases. The surface potential signals obviously increases when stress is larger than the last maximum during cyclic loading.
Transmission characteristics of very low frequency electromagnetic wave of mine-seam wireless through-the-earth communication system
JIA Yulong, LI Fengxia, TAO Jinyi, WANG Peng
2015, 41(9): 31-33. doi: 10.13272/j.issn.1671-251x.2015.09.009
<Abstract>(105) <PDF>(3)
Abstract:
Transmission model of very low frequency electromagnetic wave in mine-seam was built which was based on Maxwell equations, and transmission characteristics of very low frequency electromagnetic wave were researched when it transmitted on the interface of mine roadway and mine-seam, in mine-seam and on the interface of mine-seam and the ground. The conclusions are as following: when very low frequency electromagnetic wave transmits from mine roadway into mine-seam, it is approximately in the vertical incidence condition; when very low frequency electromagnetic wave transmits on the interface of mine-seam and the ground, total reflection will occur with a little critical angle, and a part of very low frequency electromagnetic wave cannot pass through the ground.
Research of impact of two kinds of check valve on vibration characteristics of long pipeline
LYU Fuyan, CAO Ping, JIA Xuankai, GAO Jie, HAO Xuedi, WU Miao
2015, 41(9): 34-39. doi: 10.13272/j.issn.1671-251x.2015.09.010
<Abstract>(72) <PDF>(3)
Abstract:
In order to study implementation effect of different check valves, vibration test was conducted in testing systems equipped with spring-loaded passive check valve and hydraulic active check valve respectively. Laws of time domain signal and frequency domain signal of the pipeline were studied, and impacts of two kinds of working check valve on vibration intensity of the pipeline were compared. The test results show that the hydraulic active check valve can reduce vibration strength more obviously. The conclusion provides reference for determining reasonable pipeline transportation parameters.
Design of automatic switchover control system without blowing-out of mine main ventilator based on fuzzy control
DONG Suling
2015, 41(9): 39-43. doi: 10.13272/j.issn.1671-251x.2015.09.011
<Abstract>(40) <PDF>(4)
Abstract:
In view of problems of large startup wind resistance and ventilation surge existed in switchover control system without blowing-out of mine main ventilator, a hot standby scheme based on air door opening adjustment of main ventilator was put forward, and an automatic switchover control system without blowing-out of mine main ventilator based on fuzzy control was designed. The system uses PLC as control core, adopts fuzzy control algorithm to analyze working status of main ventilator, does not rely on equation parameter of motor running state, and can automatically select the best output to control two ventilators, so as to realize overall volume stability and complete switchover without blowing-out of mine main ventilator. The application results show that the system has good running robustness, can realize stable operation of the ventilation system in the switchover process of the main ventilator, and eliminate possible dangers of gas accumulation and overrun of original switchover system of main ventilator.
Research of selection of reference stations in mine area deformation monitoring based on JSCORS
CHEN Zhongwei, CHEN Xibin, QIU Chuan, ZHANG Shubi
2015, 41(9): 44-48. doi: 10.13272/j.issn.1671-251x.2015.09.012
<Abstract>(29) <PDF>(4)
Abstract:
Based on data information of Jiangsu Province continuously operating reference stations, the influence of the number and distribution of CORS reference stations to the solution accuracy of GPS network data were discussed combining with 6 stations solution of the GPS deformation monitoring network in a coal mine. The experimental results show that when processing regional GPS network, it's the best to select the CORS reference station as the reference frame, and the CORS reference station space distribution should be as uniform as possible, and the number reached 4, and there's no need to select the same side CORS reference station. The conclusion provides the basis to process GPS network data by selecting suitable CORS reference stations.
A new fault diagnosis method of broken rotor bar of motor
XU Dongli
2015, 41(9): 49-53. doi: 10.13272/j.issn.1671-251x.2015.09.013
<Abstract>(33) <PDF>(3)
Abstract:
In view of problem of spectrum leakage and spectrum analysis difficulty caused by windowing and truncation existed in traditional spectrum analysis theory, a new fault diagnosis method of broken rotor bar of motor based on AR model and LMS adaptive notch was proposed. The method uses LMS adaptive notch to filter out fundamental component of stator current, then conducts spectrum estimation of AR parameter model and accurately detects amplitude and frequency of fault characteristics. The method provides a new way for fault detection of broken rotor bar of motor.
Research of face recognition method of underground personnel
YANG Zhuo
2015, 41(9): 53-57. doi: 10.13272/j.issn.1671-251x.2015.09.014
<Abstract>(45) <PDF>(4)
Abstract:
In view of problem of low recognition accuracy caused by sudden change of illumination, change of face view angle and external obstacle, a face recognition method based on SIFT feature in hidden Markov model(HMM) was proposed. The method takes extracted SIFT feature as training sample of HMM, and gets accurate matching library which classifies SIFT feature of face and non-face, so as to realize recognition of face image. The experimental results show that the method has quick recognition speed and high accuracy with average recognition accuracy rate of 97.14%.
Power balance control strategy for staircase modulation based on improved particle swarm optimization algorithm
YE Manyuan, HUANG Kaifeng
2015, 41(9): 57-62. doi: 10.13272/j.issn.1671-251x.2015.09.015
<Abstract>(41) <PDF>(2)
Abstract:
In view of problem of unbalanced output power of each H-bridge for staircase modulation of cascaded multilevel inverter, a power balance control strategy for staircase modulation of adjusting pulse switching angle was proposed, which realized power balance in one output cycle through interchanging output voltage of the H-bridge each 1/4 output cycle. Meanwhile, an improved particle swarm optimization algorithm based on dynamic change of inertia weight was applied into solution of switching angles of power balance control strategy for staircase modulation, which could get the optimal solution of switching angle quickly and efficiently by dynamically decreasing inertia weight with increase of evolution algebra without initial value. The simulation results verify feasibility and validity of power balance control strategy for staircase modulation based on improved particle swarm optimization algorithm.
Research of early prediction method for exogenous fire in coal mine
WANG Yuanbin, MA Xianmi
2015, 41(9): 63-66. doi: 10.13272/j.issn.1671-251x.2015.09.016
<Abstract>(53) <PDF>(4)
Abstract:
Early prediction method for exogenous fire in coal mine based on digital image processing and SVM was proposed according to coal mine environment characteristics. The method uses image processing method to extract characteristics values of temperature change rate, area growth ratio, flame flicker frequency and overall stability according to initial changing features of fire, and takes them as input signal to SVM for data fusion, so as to achieve fire detection. The experimental results show that the method can realize classification and recognition of high-risk fire source and interference signal of coal mine, and has high detection rate, low misjudgment rate, good real-time performance and robustness.
Analysis of danger source of mine gas explosion based on Petri nets
YANG Mengmeng, YUAN Mei, XU Shiqing
2015, 41(9): 67-70. doi: 10.13272/j.issn.1671-251x.2015.09.017
<Abstract>(43) <PDF>(3)
Abstract:
By analyzing danger source associated with mine gas explosion, the evolution model GEFRPN of gas explosion based on Petri nets was constructed combining Petri nets theory and the evolution of gas explosion, and the conclusion was obtained: from reasoning process of evolution model of gas explosion, changes of confidence level of danger source in evolution process of gas explosion can be seen clearly, and so the function of each danger source in evolution process of gas explosion can be obtained. The importance of danger source to gas explosion can be analyzed by reasoning process and Petri nets diagram, so as to take early measures to avoid gas explosion accidents. The evolution model of gas explosion introduces confidence, and the calculation results have fuzziness, overcomes insufficient of fault tree method which has the results inconsistent with the actual situation.
An implementation scheme of GIS graphics system based on OpenLayers
ZHANG Weiguo
2015, 41(9): 71-73. doi: 10.13272/j.issn.1671-251x.2015.09.018
<Abstract>(41) <PDF>(3)
Abstract:
In view of the state that the graphics of mining system software mostly use analog graph display, the paper introduced an implementation scheme of GIS graphics system based on OpenLayers. The scheme is secondary to be developed on the basis of OpenLayers, and uses HTML + CSS + JavaScript development technology to realize graph information browse on Web and mobile terminal on the basis of common GIS graphics function. The system has a good generality by means of graphical data driven.
Nonlinear compensation of eddy current sensor based on wavelet neural network
FU Lihua, WANG Gang
2015, 41(9): 74-77. doi: 10.13272/j.issn.1671-251x.2015.09.019
<Abstract>(40) <PDF>(3)
Abstract:
To eliminate the nonlinear error and improve the measurement accuracy of eddy current sensor, a nonlinear compensation method of eddy current sensor based on wavelet neural network and genetic algorithm was proposed. The method uses nonlinear mapping ability of wavelet neural network to make input and output of the sensor linearization, and uses genetic algorithm to search the optimal initial value of the wavelet neural network to strengthen network nonlinear approximation ability and convergence capability, which can significantly improve nonlinear compensation effect of eddy current sensor. The experimental results show that accuraty of the sensor is improved greatly after the compensation, the maximum absolute error of output voltage of the sensor is 15.55 mV, the maximum relative error is 1.36%, and nonlinear error is 0.34%.
Software realization scheme for hot standby of coal mine safety monitoring and control system
HE Lei, LIU Huifang, LI Xiao
2015, 41(9): 78-80. doi: 10.13272/j.issn.1671-251x.2015.09.020
<Abstract>(36) <PDF>(2)
Abstract:
For hot standby problem of coal mine safety monitoring and control system, a software realization scheme was proposed, namely using trigger of SQL Server 2000 database to intercept updated data in the database, using hot standby software to realize data synchronization, and designing human-machine interaction interface. For standby computer fault, database fault or software fault in the schema, corresponding solutions were proposed. The application result shows the scheme has good effect.
Error compensation method of mine-used drilling trajectory measurement system
LIANG Xiaojun, CHEN Guangzhu, JIANG Chenglin, JING Jianzhong, WU Yuanfang
2015, 41(9): 80-83. doi: 10.13272/j.issn.1671-251x.2015.09.021
<Abstract>(32) <PDF>(2)
Abstract:
The paper introduced structure and measuring principle of drilling trajectory measurement system, and elaborated error sources and compensation method in details from three aspects including sensor itself, environmental conditions and sensor installation. The simulation of the physical scene of horizontal directional drilling, and analysis of attitude angle before and after the error compensation show that making appropriate error compensation for different error source can improve the accuracy of attitude angle measurement.
Design of remote loader monitoring system based on ARM
LIU Xianfeng, QIAO Hongzhe
2015, 41(9): 84-86.
<Abstract>(48) <PDF>(6)
Abstract:
For demands of equipment maintenance management and safety production management in mining industry, a remote loader monitoring system based on ARM was designed. Equipment status information and work environment information such as noise, temperature and humidity are collected and saved by monitoring terminal of the system and transmitted to remote monitoring server through GPRS. The system can provide accurate and reliable basis for maintenance of loader and scheduling and management of production.
Analysis of anti-override trip program for underground power supply system
LUAN Yongchun, CHEN Kunpeng
2015, 41(9): 87-89. doi: 10.13272/j.issn.1671-251x.2015.09.023
<Abstract>(44) <PDF>(5)
Abstract:
Anti-override trip program for multi-level short line power supply system and its protective action principle were introduced combined transform instance of anti-override trip system of Juji Coal Mine. The program first uses fiber differential protection to transform underground tie-line, then switches to coal mine anti-override trip system based on network intelligent identification by adding communication server. The program completely solves override trip problem of underground power supply system, and does not exist resource waste problem caused by duplicate transformation.
Application of Ventsim 3D ventilation simulation system in Sitai Mine
XING Yanbing
2015, 41(9): 90-92. doi: 10.13272/j.issn.1671-251x.2015.09.024
<Abstract>(30) <PDF>(5)
Abstract:
In view of problems of complex ventilation system, difficult management and adjustment of ventilation system according to experience existed in Sitai Mine, Ventsim 3D ventilation simulation system was applied to build 3D ventilation network model, which could reflect status of ventilation system in Sitai Mine. The system realizes functions of ventilation simulation, pollutant simulation, thermal simulation, fire simulation, economy simulation and provides decision basis for management and optimization of ventilation system.
Research of ontology model of heading face
YAO Huiting, CHEN Lichao, PAN Lihu
2015, 41(9): 93-96. doi: 10.13272/j.issn.1671-251x.2015.09.025
<Abstract>(68) <PDF>(4)
Abstract:
The paper pointed out that building ontology model of heading face was an important step towards the construction of intelligent decision-making system based on deep analysis of production model of the heading face, obtained relationship between the staff, devices and environment of underground heading face by analyzing factors of mine production safety, and built safety production ontology model of the heading face. Hazardous workplace was taken as an example to simply verify the validity of construction method of the ontology model of heading face.

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