工矿自动化

Reaserch on current status of industrial development of Chinese mine Internet of things and its countermeasure

DING Sanqing

2017, 43(12): 1-5. doi: 10.13272/j.issn.1671-251x.2017.12.001

<Abstract>(88) <HTML> (13) <PDF>(11)

Abstract:
It was pointed out that industrial development of Chinese mine Internet of things developed swiftly. The govemment makes development plan and relevant policies. The govemment invests much capital in the industrial development of mine Internet of things, and makes relevant standards. Application effect of mine Internet of things technology appears preliminarily. The industrial agglomeration has a better tendency. Some questions of the industrial development were analyzed. For example, conceptual hysteresis causes to low positivity, mine Internet of things technology is instability without technical standard, mine management system is inperfect, the whole competitiveness of the industry is weak and relevant enterprise scale is smaller, etc. Some industrial development countermeasures of mine Internet of things were proposed. For example, innovating the idea and making new strategic plan, breaking out key frontier technologies and building industrial ecology by using autonomous technology, invovating business model for the industrial development of mine Internet of things through market, etc.

Design of transparent communication network system of electro-hydraulic control system of hydraulic support

WANG Shuming

2017, 43(12): 6-10. doi: 10.13272/j.issn.1671-251x.2017.12.002

<Abstract>(58) <HTML> (15) <PDF>(9)

Abstract:
Current communication network system of electro-hydraulic control system of hydraulic support adopts no host control method to transmit data, and data generation time, generation quantity and delivery time has uncertainty，so as to cause communication network system is like a "black box" for users. In order to solve the above problems, a design scheme of transparent communication network system of electro-hydraulic control system of hydraulic support was put forward. The system can understand interconnection performance of equipment through communication state diagram, understand usage of equipment communication resources through traffic view, and know availability of device communication resources and management of communication routing pipelines through fault views. The system uses intuitive and visual way to display real-time performance and fault view of communication network of electro-hydraulic control system of hydraulic support for users, and makes the system transparent. The communication network system can also clearly understand the running status of electro-hydraulic control system of hydraulic support, and find problems existed in communication network timely.

Cable traction tension overload protection device of shearer

LI Yuhua, YANG Chuanchang, YAN Yechen, LIU Guangmin

2017, 43(12): 11-15. doi: 10.13272/j.issn.1671-251x.2017.12.003

<Abstract>(85) <HTML> (9) <PDF>(8)

Abstract:
In view of problem of cable and cable traction clamp damaged by tension overloading of cable traction of shearer, a cable traction tension overload protection device of shearer was designed. The device adopts tension sensor to gather traction force signal produced in process of tracting cable by shearer, intelligent control circuit of microcomputer determines traction tension of cable of the shearer whether is overload or not through software analysis. If traction tension of the cable is overload, the microcomputer automatically controls reverse traction of the shearer, and reduces cable traction tension of the shearer to the lowest, and sends out a voice warning. The actual application verifies feasibility of the device.

Design of intelligent miner's lamp charging monitoring and management system

ZHANG Faquan, FENG Shuai, XIAO Hailin, YE Jincai, WANG Guofu

2017, 43(12): 16-21. doi: 10.13272/j.issn.1671-251x.2017.12.004

<Abstract>(47) <HTML> (7) <PDF>(9)

Abstract:
In view of problems of poor extensibility, single communication mode and difficult locating of fault point existed in current miner's lamp charging monitoring and management system, an intelligent miner's lamp charging monitoring and management system was designed. In the system, charging unit collects miner's lamp condition in real-time, control unit receives the collected data through RS485 bus and transmits it to CAN/Ethernet module through CAN bus, server receives the data through Ethernet,monitoring software displays charging condition according to the data uploaded by the server and sends miner's information to the charging unit. The test results show that the system can accurately collectminer's lamp condition and realize real-time miner's lamp monitoring and miner's information management.

Research on partial discharge pulse signal denoising of high voltage cable in coal mine

ZHOU Bing

2017, 43(12): 22-26. doi: 10.13272/j.issn.1671-251x.2017.12.005

<Abstract>(67) <HTML> (13) <PDF>(7)

Abstract:
In view of the problem that partial discharge pulse signal of high voltage cable in coal mine is easily interfered by underground noise and impacts on accuracy of insulation monitoring, wavelet entropy spatial correlation algorithm was proposed for partial discharge pulse signal denoising. In the algorithm, value of wavelet entropy is used as threshold of noise energy, and correlation between partial discharge pulse signal and noise is adjusted by changing threshold, and then the noise is distinguished and removed. The laboratory experiment and field test results show that the algorithm not only reduces the possibility of misjudging noise as a signal, but also can eliminate the interference in every scale coefficients well, keep the integrity of the partial discharge pulse signal well and improve the accuracy of on-line insulation monitoring of coal mine high voltage cable.

Design of automatic arrival registration system of coal mine

ZHAO Yunlong, WEI Feng

2017, 43(12): 26-31. doi: 10.13272/j.issn.1671-251x.2017.12.006

<Abstract>(58) <HTML> (14) <PDF>(7)

Abstract:
In order to solve problems of cumbersome registration procedure and low efficient of material unloading during load vehicle of coal mine material entering or leaving warehouse, an automatic arrival registration system of coal mine was designed. The system system uses license plate recognition as the main gauge of vehicle release, and takes bar code scanning of invoice number and load measurement of loader as assistant means. The system software platform, which is based on B/S architecture, has functions of license plate recognition, bar code recognition, vehicle load monitoring, safety monitoring, system management, decision making control, report query and so on, and also communicates with coal mine enterprise resource planning system through software interfaces. According to concrete workflow of coal mine storage, the system can automatically record license plate, invoice number and time of entering or leaving warehouse of the load vehicle, which saves manual registration time and improves efficiency of load vehicle release.

Analysis and numerical simulation on parameter optimization of low hardness coal pre-splitting blasting

GAO Fan, YU Lei, TAN Lihai

2017, 43(12): 32-36. doi: 10.13272/j.issn.1671-251x.2017.12.007

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Abstract:
In view of the characteristics of low coal hardness and permeability of a certain area, in order to confirm suitable cartridge radius and non-coupling charging coefficient, and improve coal blasting efficiency in the area, software of ANSYS/LS_DYNA was used for simulation analysis of blast cracking, and radius of compression zone and the maximum crack length under different cartridge radius and non-coupling charging coefficient were obtained. The analysis results show that the most suitable cartridge radius is 30 mm, and the non-coupling charging coefficient is 1.5 when the coal is on the pre-splitting blasting anti-reflection; in a certain range, blast cracking effect of high hardness coal is better than low hardness coal, the main performance is that for the high hardness coal, coal crushing area radius is relatively small and cracks number is more than low hardness coal, while the crack length is also large.

Impedance dynamic compensation mechanism and implementation method of wireless power transmission system

LIU Suqi, TAN Jianping, WEN Xue

2017, 43(12): 36-43. doi: 10.13272/j.issn.1671-251x.2017.12.008

<Abstract>(86) <HTML> (9) <PDF>(7)

Abstract:
In view of the problem that transmission performance of wireless power transmission system is deteriorated with change of coupling distance in over-coupled region and in order to achieve the maximum power output with fixed-frequency mode, a new method was proposed which achieves impedance dynamic compensation by changing the generalized coupled factor variable of two planar spiral coils in primary coil circuit, and the mechanism of impedance dynamic compensation strategy were studied. Firstly, taking E-type double-tube LLC resonant inverter circuit as research object, circuit theory was used to establish model and analyze system output power, transmission efficiency and interaction mechanism of characteristic parameters; the variation law of system output power curve and transmission efficiency curve of the system were obtained, and it is concluded that the generalized coupling factor between two compensation coils has a direct impact on the system output power curve and transmission efficiency curve. Secondly, the mechanism of impedance dynamic compensation strategy was revealed, and an implementation program with fixed-frequency mode was presented. In the end, the correctness and validity of the theoretical analysis were verified by experiments.

Dynamics analysis of vertical rescue vehicle-mounted hoisting system under typical working conditions

ZENG Yuexiang, YANG Zhaojian, WANG Shuping, XIE Jiacheng, WEN Yi

2017, 43(12): 44-47. doi: 10.13272/j.issn.1671-251x.2017.12.009

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Abstract:
Composition and working principle of vertical rescue vehicle-mounted hoisting system were introduced. A 3D model of the system was built by use of UG, which was introduced into ADAMS to build dynamics model of the system. Wire rope tension and collision force between rescue capsule and ground of the system under typical working conditions such as no-load lowering of rescue capsule, heavy-load lifting of rescue capsule, emergency braking of rescue capsule and over lowering of wire rope were simulated, which provide theoretical basis for selection and design of the system.

A fault diagnosis method of coal mine belt conveyor

YANG Qingxiang, XIANG Xiuhua, MENG Bin, WANG Kaizhong

2017, 43(12): 48-52. doi: 10.13272/j.issn.1671-251x.2017.12.010

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Abstract:
In view of problems of timeliness and reliability of fault diagnosis for coal mine belt conveyor are seriously affected by various fault types and the mutual influence of symptoms, a fault diagnosis method of coal mine belt conveyor was put forward. The method adopts fault diagnosis technologies combining with rough set and neural network, uses rough set attribute reduction algorithm to optimize input fault symptoms set, and obtains the optimal reduction set. The reduced minimum condition attribute set was input into BP neural network to train in a reasonable manner, and diagnosis decision rules was obtained through continuous learning and optimization. The reduced samples of the corresponding test symptoms set attribute were input into the trained network to diagnose fault, so as to identify corresponding fault. The simulation results show that the method can fully remove redundant information, speed up network training, and improve fault diagnosis accuracy of belt conveyor.

Research on characteristic of power frequency electromagnetic wave energy radiation of mine-used cable

ZHOU Yuyang, LIU Kun, WU Maohan

2017, 43(12): 53-58. doi: 10.13272/j.issn.1671-251x.2017.12.011

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Abstract:
Power frequency electromagnetic interference of mine-used cable is an important factor which affects reliability of underground wireless communication. Wavelength of power frequency electromagnetic wave is much larger than mine roadway size, so electromagnetic field energy conversion of power frequency electromagnetic wave cannot be executed effectively in mine roadway, and electromagnetic coupling propagation equation of electromagnetic wave in free space cannot be used to study characteristic of power frequency electromagnetic wave energy radiation of mine-used cable. In view of the problem, a model of power frequency electromagnetic wave energy radiation of mine-used cable was built based on short dipole and formulas of magnetic field and electric field of the short dipole were deduced. Based on finite element method and finite difference method, electric field intensity of mine-used cable at different location of mine roadway was analyzed though numerical calculation. The results show that electric field intensity of various points at the same height as cable decreases with increase of distance between each point and the cable. Electric field intensity of various points at height differing from cable and parallel to roadway roof decreases with increase of distance between each point and the cable, which is smaller than the one at the same height as cable. Electric field intensity of various points at the same side as cable decreases with increase of distance between each point and the cable. Electric field intensity of various points at side differing from cable is smaller than the one at the same side as cable, which is less affected by distance between each point and the cable.

Research on influencing factors of arc grounding over-voltage in mine power supply system

LIU Jucai, GENG Pulong, QU Bingni, SONG Jiancheng, LUO Chao, LI Yongxue, YUAN Leiming

2017, 43(12): 58-63. doi: 10.13272/j.issn.1671-251x.2017.12.012

<Abstract>(37) <HTML> (10) <PDF>(7)

Abstract:
In order to comprehensively study influence factors such as grounding resistance, line resistance, fault location, grounding capacitance, interphase capacitance and arc ignition time on arc grounding over-voltage in mine power supply system, typical mine power supply system model and intermittent arc grounding model were built by using real time digital simulator, based on arc extinction theory of power frequency and arc extinction theory of high frequency, formation process and influencing factors of arc grounding over-voltage were analyzed theoretically, and the influencing factors were simulated. The simulation results show that arc ignition time has the most significant influence on arc grounding over-voltage, line resistance, grounding resistance and interphase capacitance have great influence, fault location and earth capacitance have small influence; arc grounding overvoltage is a comprehensive reflection of system parameters, and the overvoltage values of different power supply systems in mines vary greatly.

Research on simulation technology of surface air leakage of shallow-buried goaf based on network calculatio

WU Fengliang, HE Xiaochen, CHANG Xintan, MA Li, LI Chao

2017, 43(12): 64-69. doi: 10.13272/j.issn.1671-251x.2017.12.013

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Abstract:
In order to analyze influence of surface air leakage of shallow-buried coal seam on mine ventilation system and goaf flow field, a coupling model of shallow-buried goaf flow field and roadway ventilation network under surface air leakage was established. According to feature of many branches in goaf network, a LDLT decomposition method was put forward to improve ventilation network calculation performance of Newton method. Taking surface air leakage of 15207 goaf of Hongliulin Coal Mine as an example, affection of large-scale surface air leakage on ventilation system and goaf flow field under different surface air leakage were simulated, and conclusions were gotten such as unnormal distribution of spontaneous combustion "three zones" in goaf caused by surface air leakage and surface air leakage should not exceed 5 m3/s, which provided technical support for safety mining of working face.

Research on integrated command decision-making information platform for mine emergency rescue

ZHENG Wanbo

2017, 43(12): 70-75. doi: 10.13272/j.issn.1671-251x.2017.12.014

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Abstract:
In view of problem of difficult information flow operation of domestic existing mine emergency command system, and in order to solve key problems of integration such as lack of information asymmetry and information loss, an integrated command decision-making information platform for mine emergency rescue was designed, overall structure of the platform, decision-making information server and client software were introduced in details, and information transmission method of the platform was expounded emphatically. The field exercise and test results show that the platform satisfies actual function requirements of mines, and improves information transmission efficiency of emergency command and informatization level of emergency rescue command system.

Design of lithium battery miner's lamp using wireless charge

REN Zhishan, HUANG Chunyao

2017, 43(12): 76-81. doi: 10.13272/j.issn.1671-251x.2017.12.015

<Abstract>(61) <HTML> (7) <PDF>(7)

Abstract:
In order to solve problems that miner's lamp cannot work for a long time due to limited capacity of its lithium battery and there are hidden dangers for charging in coal mine underground, a new type of lithium battery miner's lamp using wireless charge was designed which can be charged both by lamp-charging rack on ground and by wireless power transmission technology in coal mine underground. In coal mine underground, wireless power transmitting circuit in base of the miner's lamp wireless charger converts electric energy into electromagnetic wave to surrounding space, wireless power receiving circuit of the miner's lamp receives the electromagnetic wave signal through coil and converts it into DC 5 V signal, and then uses special high-precision charging circuit to charge lithium battery of the miner's lamp. The test results show that the miner's lamp has advantages of high conversion efficiency of electric energy, and the charging process is in accordance with charging characteristics of the lithium battery with high safety.

Parametric design system of mining and conveying equipment parts based on Web

LUO Jingwei, REN Fang, YANG Zhaojian

2017, 43(12): 82-85. doi: 10.13272/j.issn.1671-251x.2017.12.016

<Abstract>(31) <HTML> (7) <PDF>(5)

Abstract:
In order to realize parametric design of mining and conveying equipment parts in Web pages quickly and easily, parametric design system of mining and conveying equipment parts based on Web was developed by use of secondary development technology of ANSYS software and Web page design and development technology, and overall design and key technologies of the system were introduced. The system combines parts parameters entered by user in Web page with parts modeling APDL command flow, and call ANSYS software to complete parametric design of mining and conveying equipment parts, so as to reduce professional requirement of designer and improve design efficiency.

Design of physiological data acquisition and processing system for underground personnel

GUO Tianwen, HUI Qiang, PAN Yuanhong, QIAO Ziyu, JI Xiaoxiang

2017, 43(12): 86-89. doi: 10.13272/j.issn.1671-251x.2017.12.017

<Abstract>(35) <HTML> (11) <PDF>(5)

Abstract:
A design scheme of physiological data acquisition and processing system for underground personnel was proposed. Hardware design of data acquisition terminal, data acquisition and processing method and ZigBee data transmission design of the system were introduced. The system can acquire the data of oxygen saturation of blood, pulse and body motion of underground personnel real-timely, and get physiological condition of the personnel by processing the acquired data, which displays on monitoring interface of upper computer. The test results show that the accuracy of data acquisition of the system is over 90%, and data transmission is reliable without data packet loss.

Design of protocol stack used in mine communication terminal based on SIP

LI Fangyuan, SUN Xufeng, GU Jun

2017, 43(12): 90-94. doi: 10.13272/j.issn.1671-251x.2017.12.018

<Abstract>(33) <HTML> (9) <PDF>(7)

Abstract:
In order to realize communication fusion among mine-used IP communication terminals, a protocol stack used in mine communication terminal based on SIP was designed. Structure and specific design scheme of the protocol stack were introduced. The protocol stack has SIP syntax analysis module, SIP semanteme analysis module and media process module, which can realize calling building and management of mine SIP communication terminals based on IP network. The test results show that the protocol stack can interactively communication with different SIP terminals, and has all normal SIP calling management functions, which meets requirement of mine-used VOIP communication.

Fault diagnosis method of shear gearbox

DU Yuhui, PANG Xinyu, YANG Zhaojian

2017, 43(12): 94-99. doi: 10.13272/j.issn.1671-251x.2017.12.019

<Abstract>(42) <HTML> (10) <PDF>(9)

Abstract:
For the problem that insufficient lubrication or abnormal abrasion easily occurs during shear gearbox operating, a fault diagnosis method of shearer gearbox based on partial least squares regression was proposed. The Fe content, viscosity, acid value and water content of lubricating oil in shearer gearbox were taken as detection indexes, and a partial least squares regression model was established on the basis of data initialization process and principal component extraction, which could express abrasion of shear gearbox. The model was tested by the actual operation state diagnosis of shear gearbox in a coal mine. The test result shows that error between actual measured value of Fe content in lubricating oil and the predicted value by the model is smaller under normal abrasion conditions of the shear gearbox, but error between the two value is larger under fault conditions, so as to correctly judge the abrasion and fault state of the gearbox.

Research on 3D modeling method of complex rock strata surfaces based on unit divisio

LIU Yong, CUI Hongqing

2017, 43(12): 99-103. doi: 10.13272/j.issn.1671-251x.2017.12.020

<Abstract>(43) <HTML> (8) <PDF>(7)

Abstract:
In view of the problem that existing 3D modeling method of rock strata surfaces does not systematically consider the construction of 3D modeling of complex rock strata surfaces with geological conditions such as fault and collapse column, horizontal projection unit features of rock strata surfaces under different geological conditions were given by defining the projection degree and projection unit, and a 3D modeling method of complex rock strata surfaces based on unit division was proposed. Firstly, the horizontal projection unit and the spatial interpolation unit of rock strata surface were divided, and constrained Delaunay triangulation was performed on real projection unit by using horizontal projection unit boundary, space interpolation unit boundary, control point and control line of rock strata surface as constraints. Then interpolation points of the rock strata surface corresponding to vertices of the triangulation in each spatial interpolation unit were respectively solved, and the 3D graphics of the rock strata surface were drawn by using 3D computer graphics technique. The example analysis results show that by dividing the horizontal projection unit and the space interpolation unit, the complex rock face can be decomposed into several general rock facets so as to reduce the difficulty of 3D modeling; reasonable constrained Delaunay triangulation and spatial interpolation can effectively construct 3D model of complex rock strata surfaces.

2017 Vol. 43, No. 12

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