Method for Identification of Results of Dynamic Overloads in Assessment of Safety Use of the Mine Auxiliary Transportation System

Tokarczyk, Jarosław

doi:10.1515/amsc-2016-0052

Cited by 5 publications

(7 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this paper, it is shown that the values of forces measured in the slings the for the moving transport set can significantly differ from those derived from the static model. Although the dynamic forces generated during braking of the set are greatly more significant than the forces measured during driving, according to the literature reports [11,12,14], the authors of these publications do not calculate the force values during the passage of the suspended train at a constant speed.…”

Section: Discussionmentioning

confidence: 99%

“…Limit speed values of the transport system were determined, as well as corresponding forces transferred to anchor bolts at which the bolts are damaged. It was therefore proven that the calculations (numerical calculations included) aiming to analyse critical load and buckling of the bending arc support during the braking process of the transporting system ought to be the first step in the process allowing for increasing the speed of suspended monorails [13][14][15]. Similar conclusions were drawn in the study [1], where the lab research results of emergency braking of the recorded values of the braking force were used as input data to perform computer simulations of the dynamic loading of elements of the suspended monorail route.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modeling and Exploitation Load Tests of the Suspended Route Slings Caused by Passage of the Locomotive at Various Speed along Mining Excavation

Drozd¹,

Nieoczym²

2022

Adv. Sci. Technol. Res. J.

View full text Add to dashboard Cite

Despite the fact that suspended monorails have been used in the mining industry for over 50 years it is necessary to continue research on the possibilities of increasing the unit mass of the transported load or the speed of people transport. The fi rst step is to establish the exact dynamic load of suspended route' elements and compare this value with easy to calculation static load. The objective of the research was to determine the infl uence of speed and direction of travel on maximum load force applied to the sling of the route in mining excavation. The research results indicated that the speed of 2 ms −1 does not signifi cantly infl uence the load on the sling. Theoretical hypothesis, stating that the estimation of the force value in the sling ought to be performed using projecting on a surface perpendicular to the route was confi rmed. It was also proven that in order to characterize the geometry of the sling as well as a precise analysis of its load it is necessary to employ the length and the angle of the chain in relation to the above mentioned surface. Upon employing statistical analysis of the test results, the maximum dynamic eff ect of the locomotive passing was determined to be 20.1 ± 2.5% of the value of the calculated static load for all slings, projected onto a plane perpendicular to the route. For a single sling, mounted on a test route section inclined at an angle of about 10°, the increase in force due to the passage of the locomotive was up to 21.0% of the static load for this sling.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modeling and Exploitation Load Tests of the Suspended Route Slings Caused by Passage of the Locomotive at Various Speed along Mining Excavation

Drozd¹,

Nieoczym²

2022

Adv. Sci. Technol. Res. J.

View full text Add to dashboard Cite

show abstract

“…One of the methods of analyzing the operator safety is using the calculated acceleration to numerical simulations with the virtual equivalent of the HYBRID III dummy (ATB-Articulated Total Body). Examples of research work using ATB models are presented in numerous publications, e.g., [9][10][11][12]. This method has its origins in the automotive industry, where it is used to assess safety during crash tests.…”

Section: Introductionmentioning

confidence: 99%

“…The test sections were located in horizontal and inclined roadways. The model of the sensor and mounting method of the sensors in the suspension during in-situ tests is shown in the Figure 1 [11,24].…”

mentioning

confidence: 99%

An Overview of Possibilities of Increasing the Permissible Speed of Underground Suspended Monorails for Transporting People in the Conditions of Polish Underground Mining

et al. 2023

View full text Add to dashboard Cite

The permissible speed of suspended monorails in underground mines is determined by the internal regulations of each country and depends on the type of transportation. In the case of passenger transportation, the maximal driving speed in Polish underground mining regulations is 2 ms−1. Regarding the higher permitted driving speed in other countries, it is reasonable to consider changes to these regulations that would raise the permitted speed limit. Increasing the permissible travel speed would improve the efficiency of mining operations because of the significant reduction in the inefficient working time of miners traveling on the monorail from the shaft to their place of work. However, at the same time, an increase in the permissible speed of travel results in higher values of forces and accelerations affecting both the crew riding the train and the underground working infrastructure (the suspended route, slings, and arches yielding support). The results of the series of works carried out at the KOMAG Institute of Mining Technology to assess the impact of increasing the speed on the safety of both the crew and the mine infrastructure are presented in this article. For this purpose, several numerical simulations were conducted, considering the emergency braking of the suspended monorail during which the overloads are the greatest. The result of the simulations was the analysis of the effects of driving and emergency braking of the suspended monorail with increased travel speed on the following: the overloads acting on the crew being transported and the forces acting on the suspended monorail route, including the forces in each sling. Next, a potential solution for improving safety was developed. The development of the algorithm for an innovative method of sequential emergency braking of the monorail in the case of passenger transportation was one of the important solutions.

show abstract

“…The transport of people in underground mining excavations and the transport of materials and spoil in mines is one of the most important processes affecting the efficiency of raw material production. The means of transport used include floor locomotives and suspended tractors [10,21]. There are three types of floor locomotives: diesel, traction and battery-operated.…”

Section: Introductionmentioning

confidence: 99%

Energy Recuperation as One of the Factors Improving the Energy Efficiency of Mining Battery Locomotives

Polnik

Kaczmarczyk

Niedworok

et al. 2020

Management Systems in Production Engineering

View full text Add to dashboard Cite

Mining industry is currently one of the biggest industries in the world. All mines produce “indispensable” minerals, starting from fuels such as coal and ending with noble metals such as gold or copper. Mines in the world compete in the volumes of mined minerals what requires use of state-of-the-art, more efficient and, and what is more important, safer machines. Such trend favors development of technology and mobilize engineers to adapt the technologies that were used so far in easier environment to the needs of the mining industry.The article presents the issue of energy recuperation in mining battery locomotives. Simulation tests of the power supply and control system of the Lea type battery locomotive are discussed. The results of tests on the electric energy consumption of the locomotive during the operational change in the mine were presented, which were referred to the simulation results. Factors influencing the efficiency of energy recovery and the risk resulting from hydrogen emission in the recuperation process have been indicated. Also discussed is the study of the concentration of hydrogen concentration emitted from the battery of lead-acid cells during their recharging in the process of electrical braking with energy recuperation.

show abstract

Method for Identification of Results of Dynamic Overloads in Assessment of Safety Use of the Mine Auxiliary Transportation System

Cited by 5 publications

References 9 publications

Modeling and Exploitation Load Tests of the Suspended Route Slings Caused by Passage of the Locomotive at Various Speed along Mining Excavation

Modeling and Exploitation Load Tests of the Suspended Route Slings Caused by Passage of the Locomotive at Various Speed along Mining Excavation

An Overview of Possibilities of Increasing the Permissible Speed of Underground Suspended Monorails for Transporting People in the Conditions of Polish Underground Mining

Energy Recuperation as One of the Factors Improving the Energy Efficiency of Mining Battery Locomotives

Contact Info

Product

Resources

About