Tracer gas measurement and simulation of turbulent diffusion in mine ventilation airways

Arpa, Gabriel; Widiatmojo, Arif; Widodo, Nuhindro Priagung; Sasaki, Kyuro

doi:10.1007/s12404-008-0401-x

Cited by 15 publications

(8 citation statements)

References 3 publications

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“…Hutchinsson et al conducted a theoretical study on the viscosity of gas–solid two‐phase flow near a wall, they presented a simple stochastic quadrant model for calculating the transport and deposition of heavy particles in a fully developed turbulent boundary layer. Deposition rate predicted for a wide range of heavy particles by the model was close to the benchmark experimental measurements 10‐12 . Soo and Kramer discussed the effects of gravity and electrostatic forces on particle diffusion and deduced theoretical calculation expressions, and the diffusion velocity of particles can be qualitatively calculated 13,14 .…”

Section: Introductionsupporting

confidence: 70%

“…Deposition rate predicted for a wide range of heavy particles by the model was close to the benchmark experimental measurements. [10][11][12] Soo and Kramer discussed the effects of gravity and electrostatic forces on particle diffusion and deduced theoretical calculation expressions, and the diffusion velocity of particles can be qualitatively calculated. 13,14 Noorani et al developed a simple approach based on an advection diffusion equation to address the particle deposition in turbulent pipe flows, which represents a considerable advance in physical understanding over previous freeflight theories.…”

Section: Introductionmentioning

confidence: 99%

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Simulation of similar materials for dust migration in an intermediate mine heap

Huang

Zhao

Yang³

et al. 2021

Env Prog and Sustain Energy

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The similar material research method was adopted in this research to study the generation and migration law of dust in the process of discharge. The study result shows that the relation between the dust concentration and discharge rate in the unloading area is c = 6.622(M pr ) 0.37348 for real conditions derived from similar materials experiment, which can be verified mutually with the numerical simulation result. When the natural air flow in real conditions increased to 1.89 m/s, the dust concentration reached the maximum value, and then, the dust diffusion rate accelerated and the dust concentration decreased. The smaller the ore particle size, the larger the area of interaction with the air, and the larger the dust concentration. An increase of the ore moisture content can reduce the dust concentration and keep the dust concentration at a low level. Additionally, the moisture content of the ore powder without hardening was 4.17-8%. As the height of the intermediate mine heap increased, the dust produced by both falling and impact decreased, and the dust concentration decreased. The dust removal effect of installing the seal cover was verified. The research results can provide a reference for dust control of an intermediate mine heap.

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Section: Introductionsupporting

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Simulation of similar materials for dust migration in an intermediate mine heap

Huang

Zhao

Yang³

et al. 2021

Env Prog and Sustain Energy

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“…Selain untuk mengetahui kebocoran udara, hasil pengukuran perunut gas juga mempunyai informasi tentang difusi turbulensi yang dialami selama perjalanan. Nilai difusi turbulensi ini, menurut beberapa penelitian sebelumnya merupakan fungsi dari beberapa parameter seperti bilangan Reynolds, diameter terowongan, dan persentase rongga pada dinding terowongan (Arpa, Widiatmojo, Widodo, & Sasaki, 2008;Widiatmojo et al, 2015;Widodo, Sasaki, & Gautama, 2008). Makalah ini mendiskusikan hasil pengukuran gas perunut yang dilakukan di tambang emas bawah tanah Cibaliung, PT.…”

Section: Pendahuluanunclassified

Metode Gas Tracer Untuk Evaluasi Efisiensi Ventilasi Tambang Bawah Tanah

Widiatmojo

Widodo²,

Sasaki

2021

ind. mining, prof. jurnal

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Ventilasi tambang bawah tanah mempunyai peran penting untuk memastikan kecukupan suplai udara segar untuk pekerja tambang, mesin bakar internal, melarutkan gas dan partikulat, maupun menjaga suhu dan kelembaban udara. Design yang tidak benar dapat menyebabkan kebocoran dan resirkulasi udara, menurunkan efisiensi energi untuk sistem ventilasi secara total. Di lain hal, difusi turbulensi mengendalikan penyebaran gas dan partikulat.Makalah ini membahas penggunaan gas tracer untuk mengevaluasi efisiensi dari sistem ventilasi tambang. Dengan mencocokkan hasil pengukuran lapangan dengan simulasi numerik, kuantitas suplai udara yang terbuang disebabkan karena kebocoran dapat dievaluasi. Selain itu, laju pertukaran udara di front tambang juga di analisa berdasarkan data peluruhan gas. Sebagai hasil analisa, sekitar 53.5% udara bersih terbuang langsung melalui kipas utama. Sedangkan, laju pertukaran udara di salah satu front tambang, adalah sekitar 6.48 kali per jam.

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“…The use of the tracer gas measurement to detect leakage and recirculation in underground ventilation has been studied by Arpa et al (2008), Sasaki and Dindiwe (2002) and Widodo, Sasaki, and Gautama (2008). In their work, the measurement was carried out by releasing a tracer gas at certain upstream point and its arriving concentration was further monitored at certain downstream position.…”

Section: Tracer Gas Measurementmentioning

confidence: 99%