scholarly journals DESIGN OF IOT BASED COAL MINE MONITORING SYSTEM

2020 ◽  
Vol 9 (6) ◽  
pp. 87-94
Keyword(s):  
Monitoring System ◽  
Coal Mine ◽  
Temperature Sensor ◽  
Coal Mines ◽  
Wireless System ◽  
Toxic Gases ◽  
Cloud Server ◽  
Flame Detection ◽  
Unfavorable Condition ◽  
And Control

Safety of miners is a major challenge nowadays. So we are using IOT based wireless system for monitoring the coal mines and health of the workers. We use two modules which are directly connected to the CLOUD SERVER. In first module we use several SENSORS to monitor and control the various parameters in the coal mines such as temperature and humidity conditions, light detection, leakage of toxic gases and flame detection. Likewise, in next module we use heartbeat sensor and temperature sensor for monitoring the health of the miners. The data which are collected from these modules are stored in the cloud. The alarm warns during unfavorable condition in the coal mine.

scholarly journals Prevention and Control of Hydrogen Sulphide Accidents in Mining Extremely Thick Coal Seam: A Case Study in Wudong Coal Mine

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Xuchao Huang ◽  
Enmao Wang ◽  
Gang Wang ◽  
Jiuyuan Fan
Keyword(s):  
Molecular Weight ◽  
Coal Seam ◽  
Hydrogen Sulphide ◽  
Coal Mine ◽  
Prevention And Control ◽  
Coal Mines ◽  
Dynamics Simulation ◽  
Porous System ◽  
Coal Stratum ◽  
And Control

Hydrogen sulphide is a toxic gas often present in coal seams and seriously threatens the lives and health of underground workers in coal mines. In this study, we theoretically modelled hydrogen sulphide generation in extremely thick underground coal mines with the +575 level #45 coal seam of Wudong Coal Mine as an example and obtained the on-site hydrogen sulphide emission pattern and spatial distribution features by combining field measurements and computational fluid dynamics simulation. The results showed that hydrogen sulphide mainly exists in the coal porous system in an adsorbed state. Because hydrogen sulphide has a molecular weight greater than the average molecular weight of air molecules, its concentration decreases with the increase of altitude to the bottom plate. When mining the upper stratified coal stratum, it diffuses widely in the working space; while when mining the lower coal stratum, it mainly concentrates at the bottom of the working face. Based on these analyses, on-site treatments were carried out using mixtures with different concentrations of sodium carbonate and sodium bicarbonate. In addition, different combinations of catalysts as well as type A and type B wetting agents were also tested. Eventually, a neutral KXL-I absorbent was developed, and the process of preinjecting absorbent and spraying absorbent was designed. The results showed that the newly developed KXL-I absorbent has high hydrogen sulphide absorption ability and is suitable for use as an absorbent in Wudong Coal Mine; preinjecting and spraying the absorbent can effectively prevent hydrogen sulphide disasters in the +575 level #45 coal seam in Wudong Coal Mine with the optimal final concentration of 0.9% and the absorption rate of 87% at the shearer of 66.6% at the support. Overall, our study provides valuable information for the prevention and control of hydrogen sulphide disasters in coal mines.

scholarly journals Differential Game and Simulation Study on Management Synergy of Regional Coal Mine Emergencies in China

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Yu Hao ◽  
Chaolun Sun ◽  
Jianping Wei ◽  
Sasa Gu ◽  
Fan Zhang
Keyword(s):  
Emergency Management ◽  
Differential Game ◽  
Coal Mine ◽  
Selection Process ◽  
Coal Mines ◽  
Optimal Method ◽  
Joint Force ◽  
The Government ◽  
The Cost ◽  
And Control

Emergency management of coal mines requires enhanced synergy among departments, institutions, and enterprises, which means overall efficiency in management. Their synergy can effectively lower the cost of emergency management, improve the effectiveness of it, and build a strong joint force for the prevention and control of emergencies. Accordingly, this study established a synergy system for regional coal mine emergency management and analyzed the interest relationship among key stakeholders in the system. Then, it established differential game models of the management synergy, explored the selection process of the behavior strategy of each stakeholder under different situations, and provided important tools for quantitative analysis on emergency management synergy practice. Furthermore, numerical simulation was carried out to analyze the influencing factors of their decision behaviors. The research results are of great significance for the comprehension of the evolution mechanism for the emergency management synergy of coal mines, the assistance for the government in determining the optimal method in emergency management synergy, the mobilization of the stakeholders, and the improvement of the current situation of emergency management synergy of coal mines in China.

scholarly journals Analysis on the Development Status of Coal Mine Dust Disaster Prevention Technology in China

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Hui Zhang ◽  
Weihai Han ◽  
Youlin Xu ◽  
Zhenfeng Wang
Keyword(s):  
Coal Mine ◽  
Prevention And Control ◽  
Occupational Diseases ◽  
Coal Mines ◽  
Control Measures ◽  
Dust Removal ◽  
Dust Collector ◽  
Mine Dust ◽  
Mining Face ◽  
And Control

In recent years, with the increasing level of mechanization, automation, and intelligence in mine mining, dust pollution in the working environment of coal mines has become increasingly serious. Coal mine dust prevention is an important work related to the life, health, and production safety of miners, and it is also one of the technical problems of mine safety in production. With the continuous revision and improvement of China′s Occupational Disease Prevention and Control Law, coal mining enterprises have generally strengthened the publicity, prevention, and control of occupational diseases among employees, and the control of coal mine dust has been used as a means for enterprises to improve the production environment and strengthen the occupational health of employees. Key work-based studies have shown that China’s coal mines have formed a theoretical system and technology system of dust prevention and control. In the future, China’s coal mines will start from intelligent dust prevention, achieve high-precision dust sensing-transmission-assessment and early warning, and develop a combined dust collector that integrates the functions of atomization dust removal, miniaturization, dry and wet mixing, and large air suction capacity. The combined dust collector realizes the efficient ventilation control and dust removal of the fine dust in wide-area complex spaces such as fully mechanized mining face and fully mechanized mining face. At the same time, breakthroughs have been achieved in low-permeability coal seams, such as strong hydraulic permeability-enhancing technology, intelligent dust-proof robots, and chemical dust suppression. This article introduces the basic concepts, generation, distribution, and hazards of coal mine dust and analyzes the characteristics, applicable conditions, and use effects of various dust control measures such as ventilation dust removal and wet dust removal. Moreover, this article also proposes specific prevention and control measures for related occupational diseases and discusses the development trend of dust prevention and control technology in the hope of providing guidance and reference for coal mine dust prevention and control.

scholarly journals Probabilistic Membrane Computing-Based SLAM for Patrol UAVs in Coal Mines

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Jiachang Xu ◽  
Yourui Huang ◽  
Ruijuan Zhao ◽  
Yu Liu ◽  
Hongjin Li
Keyword(s):  
Coal Mine ◽  
Membrane Computing ◽  
Coal Mines ◽  
Membrane System ◽  
Environmental Perception ◽  
Integrated Navigation ◽  
Depth Cameras ◽  
Navigation Algorithm ◽  
Localization And Mapping ◽  
And Control

Patrol unmanned aerial vehicles (UAVs) in coal mines have high requirements for environmental perception. Because there are no GPS signals in a mine, it is necessary to use simultaneous localization and mapping (SLAM) to realize environmental perception for UAVs. Combined with complex coal mine environments, an integrated navigation algorithm for unmanned helicopter inertial measurement units (IMUs), light detection and ranging (LiDAR) systems, and depth cameras based on probabilistic membrane computing-based SLAM (PMC-SLAM) is proposed. First, based on an analysis of the working principle of each sensor, the mathematical models for the corresponding sensors are given. Second, an algorithm is designed for the membrane, and a probabilistic membrane system is constructed. The probabilistic SLAM map is constructed by sparse filtering. The experimental results show that PMC can further improve the accuracy of map construction. While adapting to the trend of intelligent precision mining in coal mines, this approach provides theoretical support and application practice for coal mine disaster prevention and control.

Application of 3G Technology in Coal Mine Monitoring System

2012 ◽  
Vol 616-618 ◽  
pp. 471-474
Author(s):  
Yong Li Ma
Keyword(s):  
Monitoring System ◽  
Software Design ◽  
Coal Mine ◽  
Safety Monitoring ◽  
Video Monitoring ◽  
Complex Environment ◽  
Wireless System ◽  
Alarm Signal ◽  
Safety Monitoring System ◽  
Field Data Collection

Aiming at the present situation of complex environment and safety monitoring system in coal mine, this article proposes one kind design scheme about wireless system in coal mine monitoring based on the 3G technology, introduces the hardware and software design. The system makes use of monitoring terminal completed field data collection and processing, image and alarm signal are accessed internet through the 3G wireless network, realize remote monitoring center real-time video monitoring on the mine site.

scholarly journals SISTEM MONITORING SCADA TANGKI GULA TETES BERBASIS WIRELESS MENGGUNAKAN PROTOKOL MODBUS TCP/IP

2019 ◽  
Vol 18 (2) ◽  
Author(s):  
Sukamto Sukamto ◽  
Yohan Intan
Keyword(s):  
Monitoring System ◽  
Temperature Sensor ◽  
Access Point ◽  
Data Retrieval ◽  
Wireless System ◽  
Analog Input ◽  
Sugar Factory ◽  
Modbus Protocol ◽  
Level Sensor

ABSTRACTThe molasses monitoring system at sugar factory still uses conventional monitoring by measuring directly on the tank. It is very ineffective because when conducting sale and purchase of molaseses must measure to the tank so that the effectiveness of the sale and purchase transactions is very less.The purpose of this research to increase sale and purchase eficiency of molasses at sugar factories in the madiun area. One such device is a wireless system that can transmit data from the tank so there is no need to measure the tank in the field. Many devices are used such as access point, receiver, analog input based LAN communication, PT100 temperature sensor, level sensor, etc.Analog input-based LAN communication is one device that connects between sensors and computers through a LAN network which is then transmitted by access point through wireless signals so that it can be accessed by the receiver remotely without installing cable as far as 300 meters. Data from receiver can be accessed by computer by using visual studio program as SCADA monitoring interface by using TCP / IP modbus protocol. The result of this research can simplify the process of data retrieval from sugar tank in the field.Keywords: SCADA,Modbus TCP/IP,Monitoring System, WirelessABSTRAKSaat ini sistem monitoring gula tetes di pabrik gula masih menggunakan monitoring konvensional dengan mengukur langsung pada tangki tetes. Hal ini sangat tidak efektif karena saat melakukan transaksi jual beli gula tetes harus mengukur terlebih dahulu ke tangki penampungan sehingga efektifitas dari transaksi jual beli sangat kurang.Tujuan penelitian ini adalah peningkatan sistem pada transaksi jual beli gula tetes pada pabrik gula yang ada di area Madiun. Salah satu perangkat tersebut adalah sistem wireless yang dapat mengirimkan data dari tangki sehingga tidak perlu mengukur tangki di lapangan. Hal tersebut saat ini menjadi salah satu fokus penelitian yang terus dikembangkan. Banyak perangkat yang digunakan seperti acces point, receiver, analog input berbasis komunikasi LAN, sensor suhu PT100, sensor level, dll.Analog input berbasis komunikasi LAN merupakan salah satu perangkat yang menghubungkan antara sensor dan komputer melalui jaringan LAN yang kemudian di pancarkan oleh acces point melalui sinyal wireless sehingga dapat diakses oleh receiver dari jarak jauh tanpa memasang kabel sejauh 300 meter. Data dari receiver dapat diakses oleh komputer dengan menggunakan program visual studio sebagai interface SCADA monitoring dengan menggunakan protokol modbus TCP/IP. Hasil dari penelitian ini dapat mempermudah proses pengambilan data dari tangki gula tetes di lapangan.Kata Kunci: SCADA,Modbus TCP/IP, Sistem Monitoring, Wireless, Komunikasi

scholarly journals Application of a FBG-Based Instrumented Rock Bolt in a TBM-Excavated Coal Mine Roadway

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Bin Tang ◽  
Hua Cheng ◽  
Yongzhi Tang ◽  
Zhishu Yao ◽  
Chuanxin Rong ◽  
...  
Keyword(s):  
Monitoring System ◽  
Coal Mine ◽  
Electromagnetic Interference ◽  
Coal Mines ◽  
Work Conditions ◽  
Rock Bolt ◽  
Rock Bolts ◽  
Axial Forces ◽  
Underground Coal Mines ◽  
Fbg Sensors

Rock bolts have been widely applied with roadway excavation in underground coal mines to prevent roadway collapse and improve the stability of roadway surrounding rocks. Overloading and failures of rock bolts could result in accidents or casualties in coal mine roadways. Consequently, monitoring axial forces and work conditions of rock bolts plays an increasingly important role in ensuring safe operations of underground coal mines. Conventional mechanical or electronic rock bolt monitoring systems are typically affected by electromagnetic interference, corrosive groundwater, and dusty circumstance in underground working sites. This work proposed a FBG-based instrumented rock bolt. Quasi-distributed FBG sensors were installed on a slotted rock bolt and encapsulated by epoxy resin that was used to fix FBG sensors on the rock bolt and protect FBG sensors from damage. The FBG sensors were calibrated before the in situ application. Monitoring results indicated that the axial forces of rock bolts installed on the roof of the roadway were higher than that of others, and the maximum axial forces of each rock bolt were typically detected near the middle portion of rock bolts. A real-time and accurate rock bolt monitoring system was established by integrating instrumented rock bolts to the existing monitoring system of the coal mine.

scholarly journals Typical Cases of Groundwater Pollution and Control Strategies for Closed Coal Mine in China

2020 ◽  
Author(s):  
Qiyan Feng ◽  
Lai Zhou ◽  
Yongping Liang ◽  
Jianwei Zhou ◽  
Hujun Ren ◽  
...  
Keyword(s):  
Coal Mine ◽  
Mine Water ◽  
Groundwater Pollution ◽  
Prevention And Control ◽  
Coal Mines ◽  
Pollution Prevention ◽  
Mining Area ◽  
Water Infiltration ◽  
Geological Conditions ◽  
And Control

Abstract Due to the coal resource depletion, complicated geological conditions, and policy adjustment of China coal mine industry, a large number of coal mines have been closed and abandoned. The rebound of groundwater level will cause flooding of goaf and roadways after mine closure. The hydrogeological conditions change significantly as well. The pollutants will leach out, transform and transport which lead to pollution and increase risk to the groundwater system in the mining area. This research investigated closed coal mining area in Xuzhou, Zibo, Fengfeng, Kaili, Yangquan, Doulishan, Huaibei, Jiaozuo, Jingxing, Mile, etc., to present typical cases for analyzing the featured pollutants in mine water. Eight groundwater pollution pathways were summarized in closed coal mines, including pollution infiltration from surface mining fissures; submerged water infiltration pollution; leaching pollution of surface solid waste; cross strata pollution from the diversion fissure zone in the mining roof; cross strata pollution through the mining fissures in the mining floor; cross strata pollution through the water-conducting wells; cross strata pollution of faults or collapse columns; water overflow from goaf. Three typical cases on cross strata pollution in the closed/abandoned coal mine were analyzed emphatically. Aiming at the prevention and control of groundwater pollution risk in coal mine, the technical ideas of reducing quantity and pollutant of mine water, channel blocking, extraction control, purification and utilization are put forward. Based on this idea, the main pollution prevention and control technologies are recommended, and the countermeasures for the environmental protection of groundwater in closed mine are proposed.

The Research And Design of Wireless Coal Mine Safety Network Monitoring System On The Basis of ZigBee

2013 ◽  
Vol 300-301 ◽  
pp. 611-614
Author(s):  
Jia Qu
Keyword(s):  
Embedded System ◽  
Monitoring System ◽  
Coal Mine ◽  
Information Access ◽  
Modern Society ◽  
Mine Safety ◽  
Design Program ◽  
Lower Complexity ◽  
The Embedded System ◽  
And Control

On the demands of the quick and convenient information access and coal mine computerization and networking of the modern society, we design a new intellectual wireless gateway control system on the basis of S3C2410 and Linux, achieving the wireless connection of Intellectual coal mine monitoring system and the terminal facilities. Furthermore, we focus on the research of the system’s organization and its software design and control of its terminal equipments on the basis of ZigBee. This gateway’s design program is based on the combination of self-designed ZigBee stack architectures and the embedded system on the purpose of connecting network and exchanging information. This system has a lot of advantages, such as lower complexity, lower power dissipation, lower cost, higher safety etc. And it is certain that its market will be huge in the future.

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