工矿自动化

Accident analysis and big data and Internet of Things in coal mine

SUN Jiping

2015, 41(3): 1-5. doi: 10.13272/j.issn.1671-251x.2015.03.001

<Abstract>(121) <PDF>(10)

Abstract:
Coal mine accidents in China from 2004 to 2013 were analyzed according to the accident categories. Respectively, the accident number percentages of roof, gas, transportation, floods, electromechanical, blasting, fire accident were 52.7 percent, 11.3 percent, 16.9 percent, 3.1 percent, 4.1 percent, 2.7 percent and 0.4 percent, while the death toll percentages were 36.8 percent, 29.7 percent, 11.3 percent, 8.1 percent, 2.5 percent, 1.9 percent and 1.9 percent respectively. Among these categories, both the accident number and the death toll percentages of roof were highest. The accident number of gas accident ranked the third and the death toll of gas accident ranked the second. But in 2005 and 2013, the death toll percentages of gas accident were highest. The accident number of transportation accident ranked the second and the death toll of transportation accident ranked the third. The accident number and the death toll of all kinds of coal mine accidents both fell sharply. The accident number percentages of gas and roof accidents declined distinctly, but the accident number percentages of transportation and electromechanical accidents have increased. Accident prevention and control of transportation and electromechanical should be further strengthen. The application of big data in coal and gas outburst, coal bumps, damage by water and fire, fault diagnosis of coal mine key equipment, coal price and need forecasting were discussed. Besides, the application of Internet of Things in control of mine safety sign allowed product, control and remote maintenance of coal mine key equipment, control of coal mine equipment material, anti-collision, control of employment with certificates and specially-assigned operating person were discussed.

Gas geological dynamic analysis and gas emission real-time pre-warning system

CUI Junfei

2015, 41(3): 5-9. doi: 10.13272/j.issn.1671-251x.2015.03.002

<Abstract>(111) <PDF>(5)

Abstract:
In order to prevent coal and gas outburst accidents and improve mine security capacity, gas geological dynamic analysis and gas emission real-time pre-warning system was built in Xinyuan Company. Gas geology spatial database was built based on statistics and analysis of mine gas geological data. The main control factors affecting gas occurrence were summarized using dynamic analysis technique, and gas parameter isolines were drawn automatically. Outburst dangerous areas were compartmentalized, and outburst dangerous working faces were specially concerned. Gas emission features and pre-warning indicators were researched. Connected with gas monitoring system seamlessly, non-contact continuous pre-warning was achieved.

Design of early-warning system of gas outburst based on dynamic characteristics of pressure monitoring

NING Xiaoliang, PU Yang

2015, 41(3): 10-13. doi: 10.13272/j.issn.1671-251x.2015.03.003

<Abstract>(84) <PDF>(4)

Abstract:
According to occurrence of coal and gas outburst and technology of related dynamic safety information collection on coal face, the paper designed an early-warning system of gas outburst on coal face based on dynamic characteristics of pressure monitoring. The system can dynamically extract real-time data from massive pressure monitoring data, and finally realizes intelligent analysis and real-time early-warning of coal and gas outburst on coal face, and it also has efficient data management capabilities. The system has achieved good effects in the field test.

Development of testing device for characteristic parameters of high temperature oxidation combustion of coalfield fire area

WEN Hu, GUO Jun, JIN Yongfei, WANG Dong, WANG Kai

2015, 41(3): 14-18. doi: 10.13272/j.issn.1671-251x.2015.03.004

<Abstract>(70) <PDF>(5)

Abstract:
According to characteristics of high temperature and lean oxygen within combustion process of coalfield fire area, features and shortages of existing testing device for characteristic parameters of coal spontaneous combustion, a testing device for characteristic parameters of high temperature oxidation combustion of coalfield fire area was developed. The experiments of temperature control performance of the device and combustion characteristics of coalfield fire area were carried out. The results show that temperature control performance of the device is good, which can be used to test combustion characteristic parameters of coalfield fire combustion simulated with different heating rates or heating ways under different oxygen concentration.

MSHE-PWM harmonic suppression method of mine hoist active front end

WAN Jun, WANG Yu, WEN Xiaofei

2015, 41(3): 19-23. doi: 10.13272/j.issn.1671-251x.2015.03.005

<Abstract>(65) <PDF>(5)

Abstract:
In view of problem of harmonic pollution and system loss of active front end of 10 kV high voltage mine hoist, MSHE-PWM harmonic suppression method was proposed. ANPC five-level topology mathematical model was established to analyze MSHE-PWM harmonic suppression principle and solve MSHE-PWM nonlinear equations under constraint conditions. Voltage balance control method of suspended capacitor was also given. The results of MSHE-PWM performance test based on 1 MW industrial prototype show that SHE-PWM technology achieves grid side low-order harmonic control of 10 kV high voltage mine hoist, and comparison experiment with SV-PWM further demonstrates superiority of MSHE-PWM in solving problems of temperature-rise and loss of 10 kV high voltage inverter system.

Classification and coding design for spatial features of underground mine

XIONG Shumin

2015, 41(3): 23-27. doi: 10.13272/j.issn.1671-251x.2015.03.006

<Abstract>(89) <PDF>(4)

Abstract:
Principles and methods of classification and coding for spatial features of underground mine were expounded for visual management and control system for underground mine production. Classification of various underground mining business units was made by linear classification method as well as geometric solids of spatial features concerning underground mine. A ternary and an octal code, with the latter including the former, were designed respectively for the business units and spatial features. Atomic action and functional action based classification method was proposed, and faceted classification method was applied in classification of feature action and attributes. Corresponding character coding was formulated. The classification and coding methods have been verified in visual management and control system for underground mining production. The results show that the methods can provide technical support for acquisition, storage, inquiry, analysis and exchange of spatial information as well as real-time simulation of equipment and personnel activities.

Design of model DFKG-2012 integrated test-bed for mine-used low-voltage feeder switch

HUANG Hesong, REN Chengcheng, GAO Xiang, ZHANG Changhong, CHEN Yujiang

2015, 41(3): 28-31. doi: 10.13272/j.issn.1671-251x.2015.03.007

<Abstract>(99) <PDF>(7)

Abstract:
In view of problems of poor tools and low work inefficiency existed in present failure detection equipment of mine-used low-voltage feeder switch, a novel model DFKG-2012 integrated test-bed for mine-used low-voltage feeder switch was designed. The test-bed takes PLC as controller, and can detect and monitor switch performances of over-voltage, under-voltage, over-load, short circuit, break, leakage and other abnormal conditions through operating buttons upon the test-bed with configuration technology. Meanwhile, the test-bed can detect performances of variety of models of mine-used low-voltage feeder switch, and can quickly judge switch failure, which reduces workload of maintenance personnel.

Research of subdivision algorithm of improved triangular prism

ZHU Defu

2015, 41(3): 34-37. doi: 10.13272/j.issn.1671-251x.2015.03.009

<Abstract>(65) <PDF>(6)

Abstract:
In view of problem of low precision and poor adaptive capacity of boundary conditions of existing calculation method for mine reserve, subdivision algorithm of improved triangular prism was proposed: triangular prism was divided into different cones according to different rules and combined with top surface, undersurface and triangle cut section of the improved triangular prism; reserve range was got according to border control conditions, and volumes and reserves of all improved triangular prisms within the control range were calculated combining with geostatistics.

Research of mine-used membrane switch type operation keyboard with high reliability

NIU Jianfeng

2015, 41(3): 38-42. doi: 10.13272/j.issn.1671-251x.2015.03.010

<Abstract>(24) <PDF>(3)

Abstract:
In view of problem of low reliability of membrane switch type operation keyboard used in underground coal mine, the paper did demand analysis from aspects of using environment, operational requirements and ergonomics, and used the following methods to improve its reliability: used plastic dropping technology for the first time for keyboard-smashing performance protection to improve anti-smashing capacity of keyboard; through structural improvements to improve compaction of double faced adhesive tape of membrance, so as to improve capacities of sealing and humidity resistance of keyboard. Underground test results validate the mine-used membrane switch type operation keyboard with high reliability has good performance.

Research progress of improving anti-interference ability and precision of infrared gas sensor

LI Yuncheng, LIANG Yongzhi, JIA Wenpei, RONG Xingfu

2015, 41(3): 42-46. doi: 10.13272/j.issn.1671-251x.2015.03.011

<Abstract>(87) <PDF>(4)

Abstract:
Factors of inner components and outside environments on anti-interference ability and precision of infrared gas sensor were analyzed. Existing research achievements and progress were discussed about improving anti-interference ability and precision of infrared gas sensor from views of structure of absorption air-chamber, signal processing circuit, concentration conversion algorithm, temperature and pressure compensation algorithms, etc.

Multi-screen joint display technology oriented to ventilation safety dynamic analysis

YAN Zhenguo, LI Chuan, WANG Yanping, CHANG Xintan

2015, 41(3): 47-50. doi: 10.13272/j.issn.1671-251x.2015.03.012

<Abstract>(53) <PDF>(7)

Abstract:
In view of characteristics of large amounts of data, many types and complex relationship of dynamic analysis results of coal mine ventilation safety, a multi-screen joint display technology oriented to ventilation safety dynamic analysis was proposed. Concept of multi-screen joint display was introduced, an intelligent linkage controller was built to control different screen display, a display form of one main screen and two vice screens and user interface were set, and a multi-screen joint display system was designed to realize information organization around business scenarios and provide linkage guidance for chained data analysis of coal mine ventilation safety. Feasibility and validity of the multi-screen joint display system were verified by field application.

Length measurement methods of drill pipe

SUN Zhifei, WU Yincheng, HU Yun

2015, 41(3): 51-53. doi: 10.13272/j.issn.1671-251x.2015.03.013

<Abstract>(140) <PDF>(5)

Abstract:
Principle and research and application conditions of some length measurement methods of drill pipe were discussed including counting method, stress wave method, electric wave method and low-voltage pulse reflection method. Advantages of the methods were compared as well as disadvantages. It was pointed out that the electric wave method and low-voltage pulse reflection method were not influenced by material, diameter and type of drill pipe, which were research direction of length measurement of drill pipe.

Research of cloud services platform of national gas geological informatio

LIN Huiqin

2015, 41(3): 54-56. doi: 10.13272/j.issn.1671-251x.2015.03.014

<Abstract>(59) <PDF>(3)

Abstract:
In view of problem that existing cloud computing services framework was not suitable for GIS complex spatial calculation and analysis, the distributed system infrastructure of Hadoop and GIS were combined to achieve cloud storage of GIS map data analysis and calculation of distributed parallel spatial, which improved user page map roaming experience and query efficiency of complicated combination of map and attributes.

Design of holographic digital mine platform of coal mine

LI Jianliang, LU Zheng, HE Yaoyi

2015, 41(3): 57-61. doi: 10.13272/j.issn.1671-251x.2015.03.015

<Abstract>(41) <PDF>(6)

Abstract:
The paper analyzed status quo of digital mine construction of coal mine of China, proposed design ideas of holographic digital mine platform of coal mine, and did deep analysis from aspects of overall architecture of system and main technical requirements. It had great significance for realization of production safety digitization, scientification of management decision-making and personnel reduction and efficiency improvement of coal mine.

Research of task scheduling of cyber physical system of coal preparation plant

LEI Xuefeng, LIU Weidong, ZHANG Shen

2015, 41(3): 61-65. doi: 10.13272/j.issn.1671-251x.2015.03.016

<Abstract>(44) <PDF>(2)

Abstract:
Cyber physical system model of coal preparation plant was established. Dynamic alliance method was applied in task scheduling of the cyber physical system. A task scheduling algorithm for the cyber physical system of coal preparation plant was proposed which was based on an improved discrete particle swarm optimization algorithm. In the improved algorithm, discrete particle swarm optimization algorithm is used for global optimization, and tabu search algorithm is adopted for local search, so as to obtain the globally optimal solution. The simulation results show that the improved algorithm improves convergence rate and precision of task scheduling and average utilization of processor.

Research of load characteristics of wireless power transmission system based on magnetic coupling resonance

XUE Hui, LIU Xiaowen, SUN Zhifeng, ZHANG Guoyuan

2015, 41(3): 66-70. doi: 10.13272/j.issn.1671-251x.2015.03.017

<Abstract>(43) <PDF>(3)

Abstract:
In order to study the influence of load on transmission performance of wireless power transmission system, circuit model of wireless power transmission system based on magnetic coupling resonance was established. The analytical expression of the minimum load to avoid frequency splitting and the optimal matching load calculation model with the maximum received power were obtained by using circuit coupling theory. At the same time, the minimum load is always less than the optimal matching load. The simulation results show that increasing the load value can inhibit the frequency splitting phenomenon for different coupling coefficient; When receive power is the maximum, the best matching load values is changed with the difference of coupling coefficient, and there always will be the best matching load. The conclusion can provide theoretical guidance for load selection of the wireless power transmission system.

Miner detection method based on conditional random field

LIU Jun, ZHU Yuanzhong, WANG Wenqing, DU Dongbi, ZHAO Qingqing

2015, 41(3): 70-74. doi: 10.13272/j.issn.1671-251x.2015.03.018

<Abstract>(24) <PDF>(2)

Abstract:
For low detection ratio, accuracy and efficiency of existing object detection methods of video image, a miner detection method based on conditional random field was proposed. The method mainly includes two sections, namely model foundation and recognition of miner detection. In the model foundation stage, characteristics of histogram of oriented gradient of sample images are extracted, whose dimensionalities are reduced by principal component analysis. Then interested regions are signed by conditional random field to calibrate training sample, and parameters of conditional random field model are trained. In the recognition stage, characteristics of histogram of oriented gradient of detected image are extracted, whose dimensionalities are reduced. The trained conditional random field model is used to calibrate each sub window of the detected image by local binary pattern method, so as to get region where miner is. The experimental results show that the method can detect miner in image correctly.

An algorithm for moving targets tracking in coal mine underground based on layered optical flow

CHENG Deqiang, LIU Jie, GUO Zheng

2015, 41(3): 75-79. doi: 10.13272/j.issn.1671-251x.2015.03.019

<Abstract>(64) <PDF>(4)

Abstract:
In view of characteristics of high noise, amounts of moving targets and target crisscross of video sequence in coal mine underground, an algorithm for moving targets tracking in coal mine underground based on layered optical flow was proposed. Firstly, the initial target tracking templates was determined by using the difference method between two adjacent video sequence frames, and then the feature points of the template was extracted by SUSAN corner detection. Finally, target detection and tracking was realized by improved layered optical flow algorithm, and the template was update in the process of tracking. The algorithm realizes stable tracking of multi-object moving object in coal mine underground, and can solve the problem of partial occlusion target. The experimental and simulation results confirm the effectiveness of the algorithm.

Enhancement technique of underground image based on dark channel prior

ZHANG Yingjun, LEI Yaohua, PAN Lihu

2015, 41(3): 80-83. doi: 10.13272/j.issn.1671-251x.2015.03.020

<Abstract>(46) <PDF>(9)

Abstract:
In view of problem that existing image fuzzy enhancement algorithm of underground coal mine cannot deal with the situation when the image is in fog and the processed images are obscure, the paper proposed an enhancement technique of underground image based on dark channel prior. The technique uses linear fuzzification function to achieve the purpose of image enhancement, and adopts dark channel prior theory to enhance image contrast, meanwhile realizes defogging and dedusting. The experimental results show that the proposed technique can improve visibility of underground image and significantly enhance image contrast.

Research of microturbine power generation system based on fuzzy PID control

SHI Ying, ZHU Lijun, REN Jianping, SUN Fuhua

2015, 41(3): 84-87. doi: 10.13272/j.issn.1671-251x.2015.03.021

<Abstract>(42) <PDF>(2)

Abstract:
Taking the microturbine and its electrical parts as a whole, a complete mathematical model of microturbine power generation system was established according to dynamic characteristics of the microturbine power generation system. Fuzzy PID controller was added to revolving speed loop to analyze dynamic characteristics of on-load microturbine system in isolated network. The simulation results show that the microturbine power generation system based on fuzzy PID control has good stability and flexibility.

Design of infrared methane concentration measurement instrument

DU Weiran, HUANG Weizhi, RONG Feng, WANG Taiyong

2015, 41(3): 87-92. doi: 10.13272/j.issn.1671-251x.2015.03.022

<Abstract>(43) <PDF>(4)

Abstract:
In view of low measurement accuracy of methane concentration measurement instrument based on gas chromatography, a zero and linear temperature compensation algorithm based on principle of infrared spectrum absorption was proposed. A kind of infrared methane concentration measurement instrument which has high precision and can achieve real-time online detection was designed based on the temperature compensation algorithm. Experimental results show that, before the temperature compensation, the larger the temperature changes, the greater the measurement error of the methane concentration will be, and the error is in the range of 3%-11.5%; after the temperature compensation, measurement value of methane concentration has minor changes with the ambient temperature, and the error is in the range of 0-2.5%.

Application of EMD filter to fault diagnosis of coal mine motor

PANG Weijian, MA Hailong, ZHU Yijun

2015, 41(3): 93-95. doi: 10.13272/j.issn.1671-251x.2015.03.023

<Abstract>(40) <PDF>(2)

Abstract:
In view of problem that fault feature of coal mine motor signal was difficult to extract, EMD filter method was proposed to apply to vibration signal analysis of coal mine motor. By analyzing distribution characteristics of characteristic frequency of motor fault, noise in vibration signal was filtered out through different approaches of EMD filtering. Field application results show that the proposed method can effectively reduce noise and improve signal to noise ratio.

Research of structure form of sensing head of feed state sensor

WANG Yao

2015, 41(3): 95-97. doi: 10.13272/j.issn.1671-251x.2015.03.024

<Abstract>(26) <PDF>(7)

Abstract:
In view of problem that existing feed state sensor is susceptible to external electromagnetic interference and leads to inaccuracy monitoring results, and cannot monitor power-down state of AC3 300 V and above equipments, detection principle of non-contact capacitive electric field was studied, and two kinds of structure forms of sensing head of feed state sensor were designed to detect electric field change of armored cable and unarmored cable, so as to achieve online feed monitoring of controlled equipment, and effectively solves problems of misinformation, poor anti-interference ability and poor stability of existing mine-used feed state sensor while detecting unarmored cable.

Design of plunger stroke dynamic monitoring system of underground hydraulic support

LIU Xiaowen, AN Rui, ZHOU Ying, JU Jinfeng

2015, 41(3): 98-101. doi: 10.13272/j.issn.1671-251x.2015.03.025

<Abstract>(57) <PDF>(3)

Abstract:
In view of problem that existing plunger stroke measurement technology of hydraulic support has low precision, high cost, and cannot prevent roof accident, the paper put forward a design scheme of plunger stroke dynamic monitoring system of underground hydraulic support based on ZigBee technology. The system uses displacement sensor to collect plunger stroke data, and sends the data to coordinator node through ZigBee network. Then the coordinator node sends the data to server on the ground through CAN bus and the Ethernet, so as to realize real-time monitoring of plunger stroke of underground hydraulic support. The test results show that measurement accuracy of the system is 1 mm, the error is 2 mm, and achieves the desired effect.

Mobile monitoring system for mine safety based on ARM

ZHOU Meng, XU Xiaohui, FAN Shurui, WEN Yang, CAO Mei, HAN Xiao

2015, 41(3): 102-105. doi: 10.13272/j.issn.1671-251x.2015.03.026

<Abstract>(48) <PDF>(2)

Abstract:
In view of problems of single monitoring information, poor flexibility and complicated wiring existed in present monitoring system for mine safety, a mobile monitoring system for mine safety based on ARM was designed. The system uses environment parameter acquisition module and USB camera to collect on-site environmental information and video information, adopts S3C6410 processor to pack the collected data and transmits the data packets to upper computer for display by WiFi, so as to control the movement of the monitoring equipment. The system can real-timely monitor areas with inconvenience into or potentially dangerous for person.

Application of next generation network in coal mine communication system

YANG Xiaohui, YANG Bin, SONG Yongbao

2015, 41(3): 105-107. doi: 10.13272/j.issn.1671-251x.2015.03.027

<Abstract>(42) <PDF>(3)

Abstract:
For problems that existing coal mine communication systems are overlapping partly in functions and difficult to integrate each other, a new coal mine communication system was designed by use of next generation network technology. The new system integrates existing scheduling communication system, wireless communication system and broadcasting communication system through IP-PBX soft switching platform. The system can realize functions of existing communication systems as well as interconnection and intercommunication of terminals in each system, which helps system upgrading. The test result shows stability and reaibility of the system.

Research of data transmission technology for automated coal loading system

WU Hui

2015, 41(3): 108-110. doi: 10.13272/j.issn.1671-251x.2015.03.028

<Abstract>(36) <PDF>(6)

Abstract:
In view of problem that part of automated coal loading systems cannot transmit data because of inconvenient communication, data transmission technology for automated coal loading system based on 3G was proposed. CDMA2000 was used to achieve wireless access to the public network, OPC server was adopted for data transmission between upper computer and PLC of on-site production system, and data collection software of Transaction Manager was used for connection between OPC server and database.

Research of intelligent vehicle loading technology

YAN Ya

2015, 41(3): 111-113. doi: 10.13272/j.issn.1671-251x.2015.03.029

<Abstract>(73) <PDF>(5)

Abstract:
In view of problems of low efficiency, serious dust pollution and needing large place of manual loading method, the paper proposed a technology of intelligent vehicle loading, and described technological process, determination of main technical parameters, realization of weighing and intelligent batching technology of intelligent vehicle loading system using the proposed technology in details.The intelligent vehicle loading technology achieves fast, accurate, uniform and flat auto-loading, can prevent material loss and environmental pollution during transportation, and ensure transport safety.

Evaluation of coal mine emergency rescue capability based on analytic network process

YANG Li, DONG Yiping, LIU Chengcheng

2015, 41(3): 114-118. doi: 10.13272/j.issn.1671-251x.2015.03.030

<Abstract>(55) <PDF>(2)

Abstract:
Coal mine emergency rescue capability evaluation model based on ANP and fuzzy comprehensive evaluation method was established in view of interdependence and feedback relationship between evaluation indexes. Empirical research on the model was carried out by means of Super Decisions software and expert marking system to realize empowerment and marking of each index, then emergency rescue capability of different coal mines can be evaluated. Empirical research result shows that the model has good feasibility and effectiveness, and has a certain reference function to research of coal mine emergency rescue capability evaluation.

2015 Vol. 41, No. 3

Submission System

Latest AcceptedMore>