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| 1 | Dust dispersion and management in underground mining faces显示文摘Presence of fine dust in air causes serious health hazard for mine operators resulting in such serious problems as coal workers’pneumoconiosis and silicosis.Major sources of dust appear of course along the mining face where the minerals are extracted.Proper control and management are required to ensure safe working environment in the mine.Here,we utilize the computational fluid dynamic(CFD)approach to evaluate various methods used for mitigating dust dispersion from the mining face and for ensuring safe level of dust concentration in the mine tunnel for safety of the operators.The methods used include:application of blowing and exhaust fans,application of brattice and combination of both.The results suggest that among the examined methods,implementation of appropriately located brattice to direct the flow from the main shaft to the mining face is the most effective method to direct dust particles away from the mining face. | Kurnia Jundika Candra Sasmito Agus Pulung Mujumdar Arun Sadashiv | 2014 | International Journal of Mining Science and Technology2014，24，1： | 39 |
| 2 | Prediction of air flow, methane, and coal dust dispersion in a room and pillar mining face显示文摘In underground coal mines, uncontrolled accumulation of methane and fine coal dust often leads to serious incidents such as explosion. Therefore, methane and dust dispersion in underground mines is closely monitored and strictly regulated. Accordingly, significant efforts have been devoted to study methane and dust dispersion in underground mines. In this study, methane emission and dust concentration are numerically investigated using a computational fluid dynamics(CFD) approach. Various possible scenarios of underground mine configurations are evaluated. The results indicate that the presence of continuous miner adversely affects the air flow and leads to increased methane and dust concentrations.Nevertheless, it is found that such negative effect can be minimized or even neutralized by operating the scrubber fan in suction mode. In addition, it was found that the combination of scrubber fan in suction mode and brattice results in the best performance in terms of methane and dust removal from the mining face. | Lu Yueze Akhtar Saad Sasmito Agus P. Kurnia Jundika C. | 2017 | International Journal of Mining Science and Technology2017，27，4： | 10 |
| 3 | Introduction and evaluation of a novel hybrid brattice for improved dust control in underground mining faces: A computational study显示文摘A proper control and management of dust dispersion is essential to ensure safe and productive underground working environment. Brattice installation to direct the flow from main shaft to the mining face was found to be the most effective method to disperse dust particle away from the mining face. However,it limits the movement and disturbs the flexibility of the mining fleets and operators at the tunnel. This study proposes a hybrid brattice system- a combination of a physical brattice together with suitable and flexible directed and located air curtains- to mitigate dust dispersion from the mining face and reduce dust concentration to a safe level for the working operators. A validated three-dimensional computational fluid dynamic model utilizing Eulerian–Lagrangian approach is employed to track the dispersion of dust particle. Several possible hybrid brattice scenarios are evaluated with the objective to improve dust management in underground mine. The results suggest that implementation of hybrid brattice is beneficial for the mining operation: up to three times lower dust concentration is achieved as compared to that of the physical brattice without air curtain. | Kurnia Jundika C. Sasmito Agus P. Hassani Ferri P. Mujumdar Arun S. | 2015 | International Journal of Mining Science and Technology2015，25，4： | 7 |
| 4 | Evaluation of the heat transfer performance of helical coils of non-circular tubes显示文摘This study addresses heat transfer performance of various configurations of coiled non-circular tubes, e.g., in-plane spiral ducts, helical spiral ducts, and conical spiral ducts. The laminar flow of a Newtonian fluid in helical coils made of square cross section tubes is simulated using the computational fluid dynamic approach. The effects of tube Reynolds number, fluid Prandtl number, coil diameter, etc., are quantified and discussed. Both constant wall temperature and constant heat flux conditions are simulated. The effect of in-plane coil versus a cylindrical design of constant coil, as well as a conical coil design is discussed. Results are compared with those for a straight square tube of the same length as that used to form the coils. Advantages and limitations of using coiled tubes are discussed in light of the numerical results. | Jundika C.KURNIA Agus P.SASMITO Arun S.MUJUMDAR | 2011 | Journal of Zhejiang University-Science A(Applied Physics & Engineering)2011，12，1： | 3 |
| 5 | CFD simulation of methane dispersion and innovative methane management in underground mining faces显示文摘 | Jundika C. Kurnia Agus P. Sasmito Arun S. Mujumdar | 2013 | Applied Mathematical Modelling2013，，： | 1 |
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