scholarly journals Numerical assessment of the water-flow hazard to workers in the water disaster of underground mine

2021 ◽  
Author(s):  
Qiang Wu ◽  
Yi Yao ◽  
Yingwang Zhao ◽  
Xiaoyan Zhang ◽  
Hua Xu ◽  
...  
Keyword(s):  
Water Flow ◽  
Underground Mine ◽  
Assessment Model ◽  
Worker Safety ◽  
Underground Mines ◽  
Dynamic Visualization ◽  
Flow Conditions ◽  
Underground Coal Mine ◽  
Numerical Assessment ◽  
Water Disaster

Abstract Understanding the details of the water-flow hazard (WH) to workers in water disasters is extremely important in disaster-risk management. This paper aims to develop a numerical assessment model for the WH affecting worker safety. An assessment model of WH is proposed for water disasters in the underground mine, which includes two characteristics: (a) from water-disaster environment to WH of workers and (b) from multiple influencing factors to quantitative comprehensive quantification. To verify the feasibility of WH, it is applied to a water disaster in an underground coal mine. The simulation results highlight that the WH model can assess the hazard value of worker-1 (m = 72 kg, H = 1.72 m) at paragraph – 6134 and paragraph – 8840 of roadway, with different water-flow conditions, in the whole time of the disaster. Meanwhile, the differences between WH for three workers, worker-1, worker-2 (m = 95 kg, H = 1.82 m), and worker-3 (m = 60 kg, H = 1.62 m), under the same flow conditions are provided by the curve. Moreover, dynamic visualization of WH is achieved, which shows how the hazard of worker-1 changes into the time of 2, 5, 11, 19, and 27 h after a disaster in the full mine. Therefore, this numerical assessment can be used to evaluate the hazards posed by water flow to workers, which meets the urgent demands of water-disaster management for underground mines.

Optimal location of emergency stations in underground mine networks using a multiobjective mathematical model

2018 ◽  
Vol 25 (4) ◽  
pp. 264-272 ◽  
Author(s):  
Reza Lotfian ◽  
Mehdi Najafi
Keyword(s):  
Mathematical Model ◽  
Coal Mine ◽  
Emergency Services ◽  
Underground Mining ◽  
Optimal Location ◽  
Underground Mine ◽  
Underground Mines ◽  
Underground Coal Mine ◽  
Location Selection ◽  
The Right

Background Every year, many mining accidents occur in underground mines all over the world resulting in the death and maiming of many miners and heavy financial losses to mining companies. Underground mining accounts for an increasing share of these events due to their special circumstances and the risks of working therein. Thus, the optimal location of emergency stations within the network of an underground mine in order to provide medical first aid and transport injured people at the right time, plays an essential role in reducing deaths and disabilities caused by accidentsObjective The main objective of this study is to determine the location of emergency stations (ES) within the network of an underground coal mine in order to minimize the outreach time for the injured.Methods A three-objective mathematical model is presented for placement of ES facility location selection and allocation of facilities to the injured in various stopes.Results Taking into account the radius of influence for each ES, the proposed model is capable to reduce the maximum time for provision of emergency services in the event of accident for each stope. In addition, the coverage or lack of coverage of each stope by any of the emergency facility is determined by means of Floyd-Warshall algorithm and graph. To solve the problem, a global criterion method using GAMS software is used to evaluate the accuracy and efficiency of the model.Conclusions 7 locations were selected from among 46 candidates for the establishment of emergency facilities in Tabas underground coal mine.

scholarly journals The Function Design for the Communication-Based Train Control (CBTC) System: How to Solve the Problems in the Underground Mine Rail Transportation?

2021 ◽  
Vol 4 (2) ◽  
pp. 31
Author(s):  
Haoxuan Yu ◽  
Shuai Li
Keyword(s):  
Mining Industry ◽  
Underground Mine ◽  
Underground Mines ◽  
Rail Transportation ◽  
Monitoring And Control ◽  
Transportation Equipment ◽  
Train Control ◽  
Function Design ◽  
The Future ◽  
Underground Transportation

With the continuous development of the mining industry, the world’s major mines have gradually entered the intelligent stage. In intelligent underground mines, the operation roads of the underground transportation equipment are very complicated, and the monitoring and control of the underground traffic have become the problems to be solved in the intelligent underground mines. Therefore, on the basis of solving the practical problems of underground mines, the concept paper discusses the possibility of the communication-based train control (CBTC) system being applied to underground mines through the summary and induction of the related literature. As mining engineers, we have proposed the function design for the CBTC system to solve the problems in underground mine rail transportation, but we still need to continue to work hard for the future development of the underground mines. The concept paper serves as a guide to the Tossing out a brick to get a jade gem, and it has implications for the development and the future of underground mine transportation.

scholarly journals Investigation and optimization of main materials consumption when mining iron ores at deep levels of the Underground Mine Group of the PJSC “ArcelorMittal Kryvyi Rih”

2020 ◽  
Vol 201 ◽  
pp. 01026
Author(s):  
Mykola Stupnik ◽  
Vsevolod Kalinichenko ◽  
Olena Kalinichenko ◽  
Sofiia Yakovlieva
Keyword(s):  
Strain State ◽  
Iron Ore ◽  
Deep Levels ◽  
Underground Mine ◽  
Underground Mines ◽  
Iron Ores ◽  
Efficient Technology ◽  
Mining Depth ◽  
Geological Conditions ◽  
Qualitative Characteristics

The work considers conditions of deep levels of the Underground Mine Group for underground ore mining (as underground mines) of the Mining Department of the PJSC “ArcelorMittal Kryvyi Rih” (the PJSC “ArcelorMittal Kryvyi Rih”). The research aims to improve indicators of mined ore mass extraction when mining rich iron ores through studying and optimizing consumption of explosives, enhancing mining technology to provide fulfilment of the underground iron ore mining program. During the research, there are analyzed mining geological and technical conditions of the deposit mining as well as current technologies of iron ore mining at the Underground Mine Group of the PJSC “ArcelorMittal Kryvyi Rih”. The work analyzes the achieved indices and consumption of explosives for drilling and blasting at the Underground Mine Group. The mining geological and technical conditions of the deposit mining as well as current technologies of mining, parameters of preparatory operations, the nomenclature and qualitative characteristics of many types of explosives are determined to have changed. This complicates planning consumption of explosives and making their estimates for work sites. However, this is a reason for selecting highly efficient technology and machinery in deteriorating mining and geological conditions of operating at over 1200 m depths. The work determines dependencies of a stress value on a mining depth and physical properties of rocks, as well as parameters of drilling and blasting operations considering the stress-strain state of the massif under high rock pressure at deep levels of the Mining Group of the PJSC “ArcelorMittal Kryvyi Rih”.

scholarly journals Importance of on-time decision making in energy sector based on perspectives: Case study new Stavalj project

2017 ◽  
Vol 21 (5) ◽  
pp. 1925-1935
Author(s):  
Dragan Zlatanovic ◽  
Lato Pezo ◽  
Aleksandar Sedmak ◽  
Snezana Kirin
Keyword(s):  
Decision Making ◽  
Sustainable Development ◽  
Swot Analysis ◽  
Numerical Solutions ◽  
Thermal Power ◽  
Assessment Model ◽  
Strategic Decision ◽  
Underground Mines ◽  
Practical Experiences ◽  
Almost All

Expression "Development conditions and perspectives" became important for numerous analyses in various industrial and social areas. Several strategic documents and studies in last two decades analysed projects with topics on perspectives of future development in Serbia. Various tools are used for development of such documents, based on recent scientific and numerical solutions, thus providing reliable assessment for strategic decision making. Almost all analyses tried to implement the theories and practical experiences through the prism of "sustainable development", which included establishment of most important sustainability parameters. Analysis and ranking presented in this paper considered the potential of the Stavalj coal deposit, near city of Sjenica in Serbia, and feasibility of construction project of new mine and thermal power plant. Basis for analysis was a hybrid assessment model which takes into account principles of sustainable development. The model incorporates quantified SWOT analysis, which applies to active underground mines in Serbia. Special attention was given to the parameters describing potential for development.

scholarly journals Explosion risk assessment model for underground mine atmosphere

2016 ◽  
Vol 35 (1) ◽  
pp. 21-35 ◽  
Author(s):  
Jianwei Cheng ◽  
Xixi Zhang ◽  
Apurna Ghosh
Keyword(s):  
Risk Assessment ◽  
Risk Mitigation ◽  
Influence Factors ◽  
Safety Margin ◽  
Mining Industry ◽  
Critical Time ◽  
Underground Mine ◽  
Time Span ◽  
Assessment Model ◽  
Explosion Risk

In the coal mining industry, explosions or mine fires present the most hazardous safety threats for coal miners or mine rescue members. Hence, the determination of the mine atmosphere explosibility and its evolution are critical for the success of mine rescues or controlling the severity of a mine accident. However, although there are numbers of methods which can be used to identify the explosibility, none of them could well indicate the change to the explosion risk time evolution. The reason is that the underground sealed atmospheric compositions are so complicated and their dynamical changes are also affected by various influence factors. There is no one method that could well handle all such considerations. Therefore, accurately knowing the mine atmospheric status is still a complicated problem for mining engineers. Method of analyzing the explosion safety margin for an underground sealed atmosphere is urgently desired. This article is going to propose a series of theoretical explosion risk assessment models to fully analyze the evolution of explosion risk in an underground mine atmosphere. Models are based on characteristics of the Coward explosibility diagram with combining mathematical analyzing approaches to address following problems: (1) for an “not-explosive” atmosphere, judging the evolution of explosion risk and estimating the change-of-state time span from “not-explosive” to “explosive” and (2) for an “explosive” atmosphere, estimating the “critical” time span of moving out of explosive zone and stating the best risk mitigation strategy. Such research efforts could not only help mine operators understand the explosibility risk of a sealed mine atmosphere but also provide a useful tool to wisely control explosive atmosphere away from any dangers. In order to demonstrate research findings, case studies for derived models are shown and are also used to instruct readers how to apply them. The results provide useful information for effectively controlling an explosive underground sealed atmosphere.

Wireless Robotics Networks for Search and Rescue in Underground Mines

2019 ◽  
pp. 286-309 ◽  
Author(s):  
Alok Ranjan ◽  
H. B. Sahu ◽  
Prasant Misra
Keyword(s):  
Emergency Situation ◽  
Underground Mine ◽  
Search And Rescue ◽  
Underground Mines ◽  
Promising Alternative ◽  
Wireless Robotics ◽  
Research Areas ◽  
Current State ◽  
Challenging Tasks ◽  
Underground Mine Workings

To ensure the safety of miners, reliable and continuous monitoring of underground mine environment plays a significant role. Moreover, such a reliable communication network is essential to provide speedy rescue and recovery operations in case of an emergency situation in a mine. However, due to the hostile nature and unique characteristics of underground mine workings, emergency response communication and disaster management are very challenging tasks. This chapter presents an overview of evolving technology wireless robotics networks (WRN) which may be a promising alternative to support search and rescue (SAR) operation in underground mine emergencies. The chapter first outlines the introduction followed by a detailed discussion on the current state of the art on WRNs and their development in the context of underground mines. Finally, this chapter provides some insights on open research areas targeting the current wireless research design community and those interested in pursuing such challenging problems in this field.

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