2015 Vol. 41, No. 4

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Development trend of coal mine informatization and automatio
SUN Jiping
2015, 41(4): 1-5. doi: 10.13272/j.issn.1671-251x.2015.04.001
<Abstract>(163) <PDF>(34)
Abstract:
The paper analyzed accident rate per million tons, death rate per million tons, serious accident rate per one hundred million tons and serious accident death rate per one hundred million tons during 2004-2013. It proposed intelligent unmanned steer methods of rubber-tyred vehicle and electric locomotive, and navigation control method of mine-used robots and disaster rescue robots which mixed with machine vision, laser ranging, radar ranging and velocity measurement and artificial intelligence. It studied characteristics of mine-used machine vision and its application in coal mine. It put forward that underground mobile communication mainly uses 4G and WiFi technologies, and 5G mobile communication with faster transmission speed and higher working frequency which is more suitable for underground. It pointed out that radio wave with larger radiation power not only ignites gas and electric detonator, but also causes personal injury. It also pointed out antenna with larger transmission power and gain should be installed on top of roadway and far away from fixed post operating personnel, so as to avoid radiation for long time. It proposed mine-used robots and disaster rescue robots should employ unmanned rotorcraft with lithium battery and high power micro motor, and technologies of remote wireless control and automatic navigation control of underground robots should be studied. It put forward monitoring and early warning methods for fire disaster in goaf based on gas and temperature remote measuring sensors. It put forward technology requirements of monitoring for preventing coal mining illegally. It analyzed advantages and shortcomings of underground visible light communication.
Design of distributed water inrush monitoring system of coal mine
YAN Guang, WANG Xin, ZONG Xin, ZHAO Duan
2015, 41(4): 5-8. doi: 10.13272/j.issn.1671-251x.2015.04.002
<Abstract>(46) <PDF>(5)
Abstract:
For problems of high labor intensity and low data collection efficiency existed in integrated water inrush monitoring system of coal mine, distributed sensor node, routing node and sink node of hydrological parameters and rock stress are developed on the basis of ZigBee wireless sensor network architecture. A distributed water inrush monitoring system of coal mine was established. Hydrology monitoring and rock stress monitoring are integrated in an unified network. Online dynamic change of mine hydrological parameters and rock stress can be gotten real-timely through upper computer processing collected data. Testing result shows that the system has high detecting precision.
Design of wireless remote monitoring and control system based on radio modem
TAN Changse
2015, 41(4): 9-12. doi: 10.13272/j.issn.1671-251x.2015.04.003
<Abstract>(97) <PDF>(6)
Abstract:
In view of problems of large investment, long communication distance, low data transmission rate and small transmission quantity existed in monitoring and control system of water supply well and sewage treatment with cable communication mode, a wireless remote monitoring and control system based on radio modem was designed. The system uses radio modem as the transmission medium of monitoring data, video information and voice signals, and ensures the reliability and real-time performance of data transmission; uses configuration software as the monitoring software, so as to realize stable operation of the remote monitoring and control system.
Research of emergency stop control scheme for electro-hydraulic control system of hydraulic support
CHAI Wen, TIAN Muqin, SONG Jiancheng, XU Chunyu, JIANG Chunyue, YANG Shihua, YIN Weibing, TIAN Weidong, ZHAO Xudong
2015, 41(4): 13-17. doi: 10.13272/j.issn.1671-251x.2015.04.004
<Abstract>(74) <PDF>(8)
Abstract:
For inconvenient emergency stop control with low reliability of existing electro-hydraulic control equipment of hydraulic support, an emergency stop control scheme for electro-hydraulic control system of hydraulic support was proposed which was based on C8051F020 single chip microcomputer. A transmission mode taking special RS485 bus as emergency stop signal channel was drawn up as well as concrete implementation scheme of interlocking of emergency stop and reset. Meanwhile, functions of fault location, fault diagnosis and power-off memory for emergency stop state of support controller were achieved by use of software. An electro-hydraulic control system of hydraulic support based on the emergency stop control scheme has run in a coal mine with good effect.
Design of supplier collaboration management platform for industry and mine enterprises
DU Nan, DUAN Yuping, HU Bing
2015, 41(4): 17-21. doi: 10.13272/j.issn.1671-251x.2015.04.005
<Abstract>(77) <PDF>(4)
Abstract:
In order to solve problems of imperfect functions, high coupling degree, poor stability and high maintenance and use cost of traditional supplier management system for industry and mine enterprises, a supplier collaboration management platform was proposed which was based on Silverlight and model-view-view model. The platform structure, design schemes of main function modules and platform implementation based on model-view-view model were introduced in details. Application shows that the platform runs well, effectively reduces use cost and improves management efficiency.
Research of underground distributed peer to peer communication technology
GU Jun, LI Zhengdong, BAO Jianjun, GU Yidong
2015, 41(4): 22-26. doi: 10.13272/j.issn.1671-251x.2015.04.006
<Abstract>(42) <PDF>(7)
Abstract:
In view of problem of poor emergency communication performance of existing underground communication equipment, based on analysis of requirements of distributed communication technology applied in underground and comparison of performance of current four distributed peer to peer network models, a scheme of underground distributed peer to peer communication technology combined SIP protocol and fully distributed peer to peer network technology was proposed. Signaling flow, call processing between caller and callee, distributed interaction mechanism and datagram design of the scheme were described. The test results show that the scheme is a good solution for underground terminal communication in out-of-service situation.
Design of database of mine logistics management and personnel positioning system
XIAO Linjing, WEN Yicheng, SUN Chuanyu, WEN Yan, WU Hui
2015, 41(4): 26-29. doi: 10.13272/j.issn.1671-251x.2015.04.007
<Abstract>(46) <PDF>(4)
Abstract:
In order to solve problems of high cost and difficult maintenance caused by logistics management system and personnel positioning system of coal mine running independently, a way of integrating and unifying the two systems was proposed. A mine logistics management and personnel positioning system was designed by use of radio frequency identification and Microsoft SQL Server 2008. A design scheme of system database was focused on in stages of demand analysis and logical structure design. Mapping relationship of database table of main processes was given. The database has simple and clear logic structure as well as good storage structure, data sharing and data consistency. Application shows that the database has high practicability and reliability.
Precise positioning technology of operator of remote-controlled electro-hydraulic control system
ZHAO Wensheng
2015, 41(4): 30-32. doi: 10.13272/j.issn.1671-251x.2015.04.008
<Abstract>(103) <PDF>(5)
Abstract:
In view of problem that operator of remote-controlled electro-hydraulic control system is easy to malfunction while controlling the support action, precise positioning technology of operator of remote-controlled electro-hydraulic control system was studied combined with actual situation of fully mechanized coal mining face, and the positioning accuracy was improved to 1.5 m by RSSI information normalization, field strength zoning and optimal sensor positioning to meet requirements of remote-controlled electro-hydraulic control system.
Design of inverted F antenna for identification card of ZigBee accurate positioning
SUN Erhua, WU Wei
2015, 41(4): 33-35. doi: 10.13272/j.issn.1671-251x.2015.04.009
<Abstract>(54) <PDF>(4)
Abstract:
An inverted F antenna with small size, high bandwidth and radiation efficiency was designed according to demand for antenna of ZigBee accurate positioning identification card. Simulation and performance evaluation for the inverted F antenna was carried out through full-wave electromagnetic field simulation software. The simulation results show that the inverted F antenna can work in ZigBee band of 2.405-2.484 GHz, antenna return loss is less than -10 dB, the maximum gain is up to 2.5 dB under the center frequency of 2.45 GHz, and the antenna is omnidirectional. The actual test results in coal mine roadway also show that the inverted F antenna can meet practical needs of identification card of ZigBee accurate positioning.
Application of fault diagnosis technologies in coal mine machinery
PU Yasong, GUO Dewei, ZHANG Wenbi
2015, 41(4): 36-39. doi: 10.13272/j.issn.1671-251x.2015.04.010
<Abstract>(49) <PDF>(2)
Abstract:
The paper introduced maintenance categories of coal mine machinery, pointed out predictability maintenance and initiative preventability maintenance based on fault diagnosis technology are development mainstreams of maintenance of coal mine machinery, expounded several popular fault diagnosis methods of coal mine machinery, and further summarized research hotspots and development trend of fault diagnosis technologies of coal mine machinery.
Research of cloud resource service platform for coal mine training
LI Shunfeng, ZHAO Zuopeng, SONG Guojuan
2015, 41(4): 40-44. doi: 10.13272/j.issn.1671-251x.2015.04.011
<Abstract>(52) <PDF>(5)
Abstract:
Based on analysis of training resource demand of coal mine enterprise, features of cloud resource service platform for coal mine training were described, structure of the platform was designed, design methods of resource management layer and application service layer of the platform were proposed, and operating mechanism of the platform which combining modes of council, membership and corporation was introduced. The platform can provide abundant coal mine training resource for coal mine enterprise, and enhance resource sharing and information exchange among coal mine enterprises.
Research of disaster resistance ability evaluation of mine ventilation system
LIU Yejiao, TIAN Zhichao, LIU Hong, REN Yuhui
2015, 41(4): 44-47. doi: 10.13272/j.issn.1671-251x.2015.04.012
<Abstract>(41) <PDF>(3)
Abstract:
The disaster resistance ability evaluation index system of mine ventilation system during fire period was established from five aspects including ventilation system environment, equipments and facilities of ventilation and fire prevention, safety management of ventilation and fire prevention, condition of fire prevention system , and disaster avoidance and relief ability. Then, the weight of each evaluation index was calculated using analytical hierarchy process and the score standard was also made out. Finally, the disaster resistance ability of mine ventilation system during fire period was evaluated through grading method. Theoretical accordance and assurance was provided for improvement and enhancement of reliability, stability and response ability of mine ventilation system during fire period.
Research of coal mine gas disaster risk evaluation method
SHU Lichu
2015, 41(4): 48-51. doi: 10.13272/j.issn.1671-251x.2015.04.013
<Abstract>(26) <PDF>(4)
Abstract:
In view of problem that gas disaster causes serious hazards to coal mine production safety, four levels and influence factors and their weights of gas disaster evaluation index system were established by applying analytic hierarchy process, and disaster evaluation model was set up. Four main factors affecting gas disaster and three consequences severity index were proposed, and quantitative method and weights of these factors were studied based on the analytic hierarchy process, so as to quantitatively reveal main causes of gas disaster. The method has great significance to prevent occurrence of coal mine gas accident.
Optimization design of complex flameproof enclosure based on finite element analysis
SUN Yu, LIU Li
2015, 41(4): 52-54. doi: 10.13272/j.issn.1671-251x.2015.04.014
<Abstract>(57) <PDF>(3)
Abstract:
According to requirements of GB/T 3836.2-2010 for flameproof enclosure, three-dimensional design software was used for modeling of complex flameproof enclosure. Box model was simplified according to manufacturing process of the box, and influence of simplified method on the results was validated. Finite element analysis software was used for analysis of the model, and the maximum deformation data of the box was obtained to enhance strength of the box.
Improvement of underground LANDMARC location algorithm
HAN Tao, HUANG Yourui, XU Shanyong, QU Liguo
2015, 41(4): 55-58. doi: 10.13272/j.issn.1671-251x.2015.04.015
<Abstract>(48) <PDF>(5)
Abstract:
For location precision of LANDMARC affected by underground non-line-of-sight error, multipath effect and tag collision, LANDMARC location algorithm was improved from the view of measurement of received signal strength indication value, selection of received signal and tag anti-collision. The improved LANDMARC location algorithm judges the nearest reference tag by measuring the received signal strength indication value directly, abandons error signal through Gaussian filter, sets reasonable timeslot for signal sending according to tag number and resets the timeslot at tag collision time. The simulation results verify effectiveness of the improved LANDMARC location algorithm.
Research of electromagnetic radiation characteristics of MIT wireless power transmission system
TIAN Zijian, LIN Yue, WANG Wenqing, CHEN Jian, LI Weixiang
2015, 41(4): 59-64. doi: 10.13272/j.issn.1671-251x.2015.04.016
<Abstract>(28) <PDF>(4)
Abstract:
When MIT wireless power transmission system acquired the maximum transmission efficiency, magnetic and electric field distributions of resonant coil were simulated by full wave method of moments and magnetic quasi static algorithm. Human brain absorption of electromagnetic radiation of the system was analyzed quantitatively by using HFSS finite element simulation software. The simulation results show that if the power of 400 W is transferred, the maximum magnetic field strength and the electric one of resonant coils are 9.376 3×10-3 A/m and 1.52×102 V/m respectively. The magnetic field strength meets standards of International Commission on Non-Ionizing Radiation Protection but the electric one beyond the standard value. The maximum of local SAR is 7.038 9×10-6 W/kg at 100 mm away from the transmitter coil, which is less than the standard value of International Commission on Non-Ionizing Radiation Protection.
Quantum neural network fault diagnosis technology for coal mine rotating electromechanical equipment
ZHANG Yongqiang, MA Xianmin, XU Meihui
2015, 41(4): 64-68. doi: 10.13272/j.issn.1671-251x.2015.04.017
<Abstract>(37) <PDF>(2)
Abstract:
In view of problem of mutual interference of failure mode for rotating electromechanical equipment in coal mine, a quantum neural network fault diagnosis algorithm was proposed based on quantum neural network theory, a quantum neural network fault diagnosis model with three-layer was constructed by using the phase-shift gate and controlled-not gate of quantum theory. A gradient descent algorithm was taken as learning algorithm for the model which was applied to recognize the fault diagnosis of scraper conveyor reducer. The preliminary research results show that the algorithm is feasible and helpful to improve fault diagnosis rate of rotating electromechanical equipment used in coal mine.
Research of face recognition algorithm of coal mine workers attendance system
CHEN Lichao, ZHANG Xiuqin, PAN Lihu, LI Bo
2015, 41(4): 69-73. doi: 10.13272/j.issn.1671-251x.2015.04.018
<Abstract>(42) <PDF>(3)
Abstract:
In view of shortcomings of low recognition rate and even unable to identify coal mine personnel existed in traditional face recognition algorithm, the paper proposed a face recognition algorithm based on SURF and FLANN. Firstly, the algorithm uses fast-Hessian detection matrix of SURF algorithm to find features, and generates feature vector of SURF descriptor. Then it adoptes search algorithm of positive and negative characteristics of Hessian detection matrix and bothway FLANN matching algorithm to match SURF descriptor, so as to realize face recognition and check on worker attendance．The experimental result shows that the algorithm can not only exclude mistake matching points，but also improve recognition speed and correct rate of SURF algorithm ,and ensure the real-time performance of the algorithm in the attendance system.
Coal-rock interface recognition based on Mean shift algorithm
JIANG Jing, ZHU Yuanzhong
2015, 41(4): 74-77. doi: 10.13272/j.issn.1671-251x.2015.04.019
<Abstract>(85) <PDF>(6)
Abstract:
A coal-rock interface recognition scheme was proposed which was based on Mean shift algorithm. Firstly, principle of Mean shift algorithm was introduced. The pixel position vector and gray value were concatenated to create a joint spatial-range domain. In order to remove isolated areas and spurious boundaries, a selection method of bandwidth parameters in Mean shift were given, which was applicable to coal-rock image segmentation. Simulation results using synthetic and real coal-rock images show Mean shift algorithm can get coal-rock boundary more accurately than K-means algorithm.
Research of automatic and quick stitching algorithm of mine monitoring image
JIANG Daihong, HUA Gang, WANG Yongxing
2015, 41(4): 78-82. doi: 10.13272/j.issn.1671-251x.2015.04.020
<Abstract>(30) <PDF>(5)
Abstract:
In view of complexity of underground environment of coal mine and limitations of image stitching algorithms, an automatic and quick stitching algorithm of mine monitoring image was proposed. The algorithm combines advantages of Harris algorithm and SIFT algorithm, and uses improved RANSAC algorithm for purification and matching of extracted feature points and model parameter estimation, so that the anti-scaling performance and noise immunity are greatly improved. It uses locality-sensitive hashing algorithm to improve success rate and real-time performance of image stitching. The experimental results show that the algorithm is robust and has fast stitching capability, and can be applied to image automatic stitching of mine monitoring image.
Application research of independent component analysis in gas concentration predictio
GONG Xingyu, CHANG Xintan, JIA Pengtao
2015, 41(4): 82-86. doi: 10.13272/j.issn.1671-251x.2015.04.021
<Abstract>(29) <PDF>(2)
Abstract:
In order to improve prediction accuracy of gas concentration with noise, a back-propagation artificial neural network(BP-ANN) prediction model based on independent component analysis(ICA) and k-nearest neighbor(k-NN) was proposed. Firstly, training samples are got by use of sliding time window algorithm, ICA is used to estimate independent component(IC) in the training samples, and training set is reconstructed with the IC which does not contain noise. Then, k-NN is used to reduce size of the training set and mixed distance measure function is introduced to reduce computation complexity of the training. The experimental results show that the prediction model effectively reduces prediction error and training time than traditional BP-ANN model.
Application of projection pursuit in gas emission predictio
WANG Jiangrong, LUO Ziqin, ZHAO Rui
2015, 41(4): 87-90. doi: 10.13272/j.issn.1671-251x.2015.04.022
<Abstract>(29) <PDF>(2)
Abstract:
In view of problem of data information lost and low prediction accuracy caused by common descending dimension methods for gas monitoring data in gas emission prediction, high dimensional sample data is transformed into one-dimensional projection data by combining principle of projection pursuit with differential evolution algorithm, and a gas emission prediction model which adopts sum of sine function is established by use of Matlab curve fitting toolbox. The experimental results show that the model has higher prediction precision and operability.
Improved tuning method of arc suppression coil with three phases and five columns in coal mine power grid
HOU Wenbao, LI Delu, LUO Yanfang, LI Bo
2015, 41(4): 90-93. doi: 10.13272/j.issn.1671-251x.2015.04.023
<Abstract>(27) <PDF>(2)
Abstract:
For problem that resonance point is difficult to determined which lead to measuring error of capacitive current when arc suppression coil with three phases and five columns in coal mine power grid is tuned by use of resonance method, an improved tuning method was proposed. Admittance triangle composed by fixed side of edge-to-ground conductance and variable sides of edge-to-ground susceptance and admittance according to characteristics of damping ratio unchanged and out-of-resonance degree changed in tuning process. Capacitance current is calculated according to change of admittance angle. The simulation and experimental results show that the improved tuning method has higher measuring accuracy than the resonance method, and measuring error decreases with increase of damping ratio.
Research of circle buffer of embedded soft PLC system based on CAN network
LIU Xiaowen, CHEN Chunxu, ZHANG Jing, ZHANG Lei, HU Yanjun, ZHOU Xing
2015, 41(4): 94-98. doi: 10.13272/j.issn.1671-251x.2015.04.024
<Abstract>(28) <PDF>(2)
Abstract:
To reduce the error rate and packet loss rate of transmission data in embedded soft PLC system, a circle buffer of embedded soft PLC system was designed, mathematical model of the circle buffer was established. The state equation and the state transition probabilities of the circle buffer were analyzed, and its capacity and the formula of probability of being filled were also discussed. At last, the factors affecting the size of the buffer capacity under different conditions were obtained by simulating, and the relation of data buffer size and the difference between the input stream and output stream were concluded under the premise of no data loss: in the case of other conditions unchanged, the greater the difference between input stream rate and output stream rate, the greater the needed capacity for circle buffer.
Anti-interference design of frequency signal acquisition circuit of monitoring substatio
ZHANG Jiayi
2015, 41(4): 99-101. doi: 10.13272/j.issn.1671-251x.2015.04.025
<Abstract>(36) <PDF>(3)
Abstract:
The paper analyzed main causes of interference in frequency signal transmission of underground sensors of coal mine, and focused on anti-interference design scheme of frequency signal acquisition circuit of underground monitoring substation. The scheme combines dynamic threshold and static threshold to remove interference signal in hardware, and uses sliding filtering algorithm to filtrate abnormal signal in software. The practical application results verify feasibility and effectiveness of the design scheme.
Design of virtual training system for shearer operation based on Quest3D
LIU Haiyang, WANG Dahu, WANG Jingchong
2015, 41(4): 102-105. doi: 10.13272/j.issn.1671-251x.2015.04.026
<Abstract>(26) <PDF>(2)
Abstract:
In view of problem that current training methods for shearer operation can not show three-dimensional operation process of shearer from multi-angle, virtual training system based on Quest3D was designed. The system consists of lower machine and host machine, and they communicate via RS232 protocol. Lower machine is used to simulate control platform of shearer, and the control circuit taking STC89C52 microcontroller as the core realizes receiving, processing and transmission of external operation signal. Host machine uses 3DMax modeling software to create required model of virtual scene, builds virtual scene by Quest3D three engine development platform, and controls the model according to order of the lower machine. The system implements virtual training function of shearer, shortens training cycle, and reduces training cost.
Application of “one network one station” wireless communication system in coal mine
WANG Haijun, REN Ze
2015, 41(4): 106-108. doi: 10.13272/j.issn.1671-251x.2015.04.027
<Abstract>(20) <PDF>(4)
Abstract:
For problems of disperse management and difficult maintenance of each informatization system in Shendong Coal Mine, as well as difficult recovering and inconvenient emergency rescue after accidents, a “one network one station” wireless communication system was proposed. The system integrates multi systems for unified accessing, carrying, management and linkage including 3G wireless communication system, personnel positioning system, video monitoring system, voice broadcast system, dispatching control system, etc. Application in Daliuta Coal Mine and Shangwan Coal Mine shows that the system realizes functions of integrated dispatching, remote monitoring, linkage of multiple dispatching terminals and video of coal mine.
Dragging transport equipment for hydraulic drill used in gas drainage drill site
YANG Wei
2015, 41(4): 109-111. doi: 10.13272/j.issn.1671-251x.2015.04.028
<Abstract>(37) <PDF>(3)
Abstract:
For problems of large labor strength, low efficiency and poor security of device transport mode by manual labour in gas drainage drill site at present, design schemes of whole structure, control system and hydraulic system of a dragging transport equipment for hydraulic drill were introduced. The euipment, designed with modular method, can drag drill site devices towards destination through hydro-cylinder driven by pump of hydraulic drill. What is more, the equipment has remote control function. Application in Cheji Coal Mine shows that the equipment reduces labor strength and improves device transport efficiency and security, which has high economic and social benefits.
Design of rail-based emergency communication system
GUO Yong, LIN Ruoxia, LIU Xiaohong, XIANG Yuling
2015, 41(4): 111-114. doi: 10.13272/j.issn.1671-251x.2015.04.029
<Abstract>(47) <PDF>(3)
Abstract:
In view of problem of communication interruption and contact lost after coal mine and tunnel under construction collapsed, rail-based emergency communication system was designed. The system uses MCU to control generation of vibration signals, transmits the signal through rail which is not completely damaged, and picks up the signal using vibration sensors, and ultimately realizes emergency communication. The experimental results show that the system can effectively achieve information transmission to realize the purpose of emergency communication for rescue after disaster.
Design of safety monitoring system for coal mine roadway based on ZigBee technology
LYU Yilei, HE Xiaogang
2015, 41(4): 115-118. doi: 10.13272/j.issn.1671-251x.2015.04.030
<Abstract>(41) <PDF>(3)
Abstract:
In view of problems of cumbersome wiring work, inconvenient operation, high cost and low efficiency existed in monitoring for coal mine roadway roof security with data collection of wired network, a safety monitoring system for coal mine roadway based on ZigBee technology was designed. The system uses wireless strain gauge to measure stress-strain of roadway roof automatically, adopts computer administer program to analyze stress-strain of coal mine roadway roof, and evaluates the safety of coal mine roadway. The testing result shows that the system has advantages such as small error, easy operation, low cost and high efficiency.

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