Optimal Calibration of Evaporation Models against Penman–Monteith Equation

Dlouhá, Dagmar; Dubovský, Viktor; Pospíšil, Lukáš

doi:10.3390/w13111484

Cited by 30 publications

(12 citation statements)

References 35 publications

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“…Potential evapotranspiration (PET) was calculated using the Penman-Mon method. The Penman-Monteith method was also applied to the calculation of pot evapotranspiration in several pit lake areas, such as in the Czech Republic [27,28] evapotranspiration value will be used as an input to the Overland Zone Model. The data for PET calculation are the air temperature, humidity, duration of sun expo wind speed, elevation, and geographical latitude of the study area.…”

Section: Potential Evapotranspiration and Evaporation Calculationmentioning

confidence: 99%

“…Potential evapotranspiration (PET) was calculated using the Penman-Monteith method. The Penman-Monteith method was also applied to the calculation of potential evapotranspiration in several pit lake areas, such as in the Czech Republic [27,28]. This evapotranspiration value will be used as an input to the Overland Zone Model.…”

Section: Potential Evapotranspiration and Evaporation Calculationmentioning

confidence: 99%

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Water Balance of Pit Lake Development in the Equatorial Region

Tuheteru

Gautama

Kusuma

et al. 2021

Water

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In recent years, Indonesia has become the largest coal exporter in the world, and most of the coal is being mined by means of open-pit mining. The closure of an open-pit mine will usually leave a pit morphological landform that, in most cases, will be developed into a pit lake. One of the main issues in developing a pit lake is the understanding of the pit lake filling process. This paper discusses the hydrological model in filling the mineout void in a coal mine in Kalimantan which is located close to the equatorial line. The J-void is a mineout coal pit that is 3000 m long and 1000 m wide, with a maximum depth of 145 m. The development of the J-void pit lake after the last load of coal had been mined out experienced a dynamic process, such as backfilling activities with an overburden as well as pumping mine water from the surrounding pits. There are two components in the model, i.e., overland/subsurface and pit area. The overland zone is simulated using the Rainfall-Runoff NRECA Hydrological Model approach to determine the runoff and groundwater components, whereas the pit area is affected by direct rainfall and evaporation. The model is validated with the observation data. The main source of water in the J-void pit lake is rainwater, both from the surrounding catchment area as well as direct rainfall. As this coal mine area is characterized as a multi-pit area and, consequently, several pit lakes will be formed in the future, the result of the hydrological model is very useful in planning the future pit lakes.

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Section: Potential Evapotranspiration and Evaporation Calculationmentioning

confidence: 99%

Section: Potential Evapotranspiration and Evaporation Calculationmentioning

confidence: 99%

Water Balance of Pit Lake Development in the Equatorial Region

Tuheteru

Gautama

Kusuma

et al. 2021

Water

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“…For powered roof support, which is built of independent sections, it is imperative to control [8,9] the operating parameters of these sections and, therefore, the entire roof support. The powered roof support protects the working space from the rock mass and must provide adequate space to operate other machines and ensure ventilation safety [10,11]. This is especially important from the point of view of caving excavations, which, as a porous medium, also affect the powered roof support and the ventilation system [12,13].…”

Section: Introductionmentioning

confidence: 99%

Optimal geometry of the powered roof support’s operation

Trzop,

Szurgacz

2024

IOP Conf. Ser.: Earth Environ. Sci.

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Monitoring the working parameters of powered roof support is an area for improvement in hard coal mining. The phenomena occurring during the operation generate many risks from difficult geological and mining conditions, leading to undesirable events. In addition, improper use of machinery and equipment results in a high accident rate in mining. Thus, monitoring the operation of machines in mining reduces accidents and losses resulting from stops and prevents unforeseen failures caused by operational and external factors. The paper presents the research results on the optimal geometry of the powered roof support operation in the mining wall. The research included the powered roof support’s essential elements’ operation. Sensors constituting the measuring system were installed on these elements. The measurements made by the sensors made it possible to determine the working height at a given stage of the section’s operation. The research was carried out in three sections, which were part of the powered roof support. The measurements were taken during actual changes occurring in the coal mining process.

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“…For this purpose, bench 2 of 14 testing [35][36][37] and in situ testing [38][39][40][41] are carried out. They are complemented by model testing [42,43] and computer simulations [44][45][46] based on mathematical algorithms [47][48][49][50][51][52][53][54][55].…”

Section: Introductionmentioning

confidence: 99%

Minimizing Internal Leaks of a Powered Roof Support’s Hydraulic Prop Based on Double Block with Charging

Szurgacz

Borska²,

Diederichs³

et al. 2023

Energies

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The hydraulic system of a powered roof support performs two functions. The first function is to control the powered roof support in the extraction wall. The second function is to protect against adverse overloads resulting from rock mass pressing directly on the powered roof support. This damaging phenomenon is prevented by the protection of the powered roof support, with a safety valve built into the hydraulic system or directly into the prop. However, the third function proposed by the authors based on the research results is to minimize leaks. These leaks usually develop in the props or in the hydraulic system. The authors propose implementing changes to the hydraulic system for this purpose. The change consists of replacing the existing support block with a double block with charging. Tests were carried out in real conditions, that is, a mining wall. Tests in the mining wall were carried out on the powered roof support’s leaking prop. As a result of charging, the actual load capacity of the prop increased by about 10–50% in relation to the load capacity before charging. The use of a double block with charging ensured that the pressure in the under-piston space of the prop was maintained at a minimum of 250 bar. The results allowed us to determine the usefulness of the proposed solution and eliminate its disadvantages—the designated direction of research and development on the powered roof support allowed us to expand its functionality by minimizing leaks.

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Optimal Calibration of Evaporation Models against Penman–Monteith Equation

Cited by 30 publications

References 35 publications

Water Balance of Pit Lake Development in the Equatorial Region

Water Balance of Pit Lake Development in the Equatorial Region

Optimal geometry of the powered roof support’s operation

Minimizing Internal Leaks of a Powered Roof Support’s Hydraulic Prop Based on Double Block with Charging

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