Quantifying the thermal damping effect in underground vertical shafts using the nonlinear autoregressive with external input (NARX) algorithm

Roghanchi, Pedram; Kocsis, Karoly C.

doi:10.1016/j.ijmst.2018.06.002

Cited by 25 publications

(12 citation statements)

References 11 publications

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“…Steady-state simulations tend to over-predict the high temperatures and under-predict the low temperatures that are traditionally used to plan future underground operations [11]. Therefore, timedependent or transient simulation software is required to simulate the dynamic heat transfer processes such as the TDE and the TFE [16], [17].…”

Section: Dynamic Nature Of Mine Ventilation Systemsmentioning

confidence: 99%

“…Few simulation software packages are capable of incorporating true transient heat exchange calculations into an entire mine ventilation system [11], [17], [18].The MULTIFLUX model can simulate the TDE and TFE, but it is not yet commercially available, and it has not been applied to an entire mine ventilation network [12]. VUMA-transient was developed to simulate temperature variations, but no literature was found on the application thereof to an entire mining network [19], [20].…”

Section: Dynamic Nature Of Mine Ventilation Systemsmentioning

confidence: 99%

“…Continuous and accurate data is required for the calibration of transient heat transfer processes [17]. A wide range of technology is available that allows for the continuous monitoring of an underground ventilation network.…”

Section: Data Acquisitionmentioning

confidence: 99%

See 2 more Smart Citations

Simulating the Sensitivity of Underground Ventilation Networks to Fluctuating Ambient Conditions

Fair

Laar

Nell³

et al. 2021

SAJIE

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The weather directly impacts ventilation systems, especially large industrial systems found in underground mines. Underground mine ventilation systems have high cost implications that add to the financial strains and uncertainties of future mining operations. In addition, the dynamic nature of underground ventilation systems makes the accurate prediction of underground conditions extremely difficult using traditional steady-state methods. Therefore, improved prediction methods of dynamic underground environmental conditions are needed to ensure cost-effective ventilation systems. This paper investigates simulating the sensitivity that underground ventilation systems have to fluctuating ambient conditions. Simulation software was applied to a case study on a gold mine in South Africa. The results showed that transient software can now be applied to entire mine ventilation systems, and can improve predicting the underground environment because of fluctuating ambient conditions.

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Section: Dynamic Nature Of Mine Ventilation Systemsmentioning

confidence: 99%

Section: Dynamic Nature Of Mine Ventilation Systemsmentioning

confidence: 99%

See 1 more Smart Citation

Simulating the Sensitivity of Underground Ventilation Networks to Fluctuating Ambient Conditions

Fair

Laar

Nell³

et al. 2021

SAJIE

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“…Shaft engineering is one of the main projects of mine construction; the shaft construction accounts for about 5% of the mine underground engineering quantity and 40%~50% of the mine construction time. The shaft engineering construction speed directly affects the construction of roadway engineering, surface engineering, and electromechanical installation engineering [1][2][3][4][5]. Therefore, accelerating the shaft construction speed is an important part of shortening the mine construction time.…”

Section: Introductionmentioning

confidence: 99%

Research on the Technology of Plugging Gushing Water in the Vertical Shaft under Complicated Conditions

Jia

Wang

Liu³

et al. 2020

Geofluids

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The shaft is the throat of the mine construction, and it is easily disturbed by gushing water, which affects the mine construction progress. Aiming at technical problems under complex hydrogeological conditions in coal mines, such as vertical shaft lining rupture and serious gushing water, single-liquid and double-liquid cement grouting materials are invalid for multiple plugging of gushing water. Combining with geological data to analyze the conditions of the aquifers and water-blocking layer in the shaft, adopting the multifunctional digital electrical method and digital flow measuring instrument can accurately grasp the flow direction and flow velocity and further obtain the aquifer parameters of the main and auxiliary shafts. At the same time, based on the FLAC numerical simulation software, research on the stress, displacement, and plastic failure of the shaft surrounding rock under different water pressures (0.5 times, 1 time, and 2 times the hydrostatic pressure) and comparative analysis of the influence of the water bodies on the shaft surrounding rock are carried out. On this basis, the following are the objectives: (1) research the mechanical properties of polymer chemical material Malisan N and the mechanism of grouting to plugging gushing water and strengthening surrounding rock, (2) formulate the grouting drilling layout and construction technology for the topsoil and bedrock section of the main and auxiliary shafts, and (3) carry out long-term monitoring of the water inflow. The monitoring data showed that the measured water inflow was less than 0.05 m3/h after the grouting of the shaft surrounding rock, which achieved the purpose of preventing the shaft linings from rupturing, plugging the gushing water, and stabilizing the aquifer water pressure.

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“…Теплообмен между окружающим ствол породным массивом и проходящим по стволу воздухом, как правило, считается пренебрежимо малым для шахтных стволов, эксплуатируемых длительное время, за счет формирования в окружающем породном массиве так называемой «тепловыравнивающей рубашки» [2]. В некоторых исследованиях [11,21,22] данный фактор, тем не менее, считается важным и требует учета даже для воздухоподающих стволов, эксплуатируемых длительное время.…”

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Features of the thermal regime formation in the downcast shafts in the cold period of the year

Семин

Parshakov

2021

PMI

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In the cold period of the year, to ensure the required thermal regime in underground mine workings, the air supplied to the mine is heated using air handling systems. In future, the thermodynamic state of the prepared air flow when it is lowered along the mine shaft changes due to the influence of a number of factors. At the same time, the processes of heat and mass exchange between the incoming air and its environment are of particular interest. These processes directly depend on the initial parameters of the heated air, the downcast shaft depth and the presence of water flows into the mine shaft. Based on the obtained experimental data and theoretical studies, the analysis of the influence of various heat and mass transfer factors on the formation of microclimatic parameters of air in the downcast shafts of the Norilsk industrial district mines is carried out. It is shown that in the presence of external water flows from the flooded rocks behind the shaft lining, the microclimatic parameters of the air in the shaft are determined by the heat transfer from the incoming air flow to the underground water flowing down the downcast shaft lining. The research results made it possible to describe and explain the effect of lowering the air temperature entering the underground workings of deep mines

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Quantifying the thermal damping effect in underground vertical shafts using the nonlinear autoregressive with external input (NARX) algorithm

Cited by 25 publications

References 11 publications

Simulating the Sensitivity of Underground Ventilation Networks to Fluctuating Ambient Conditions

Simulating the Sensitivity of Underground Ventilation Networks to Fluctuating Ambient Conditions

Research on the Technology of Plugging Gushing Water in the Vertical Shaft under Complicated Conditions

Features of the thermal regime formation in the downcast shafts in the cold period of the year

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