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Simulation on dissolute and dust dispersion in comprehensive mechanized heading face with forced-exhaust ventilation

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Journal of Coal Science & Engineering(China) 2011年第3期17卷 298-304页

作者： NIE Wen CHENG Wei-min HAN Li ZHOU Sheng-ju YU Yan-bin ZHAO Shan-shan Key Lab of Mine Disaster Prevention and Control Shandong University of Science and Technology Qingdao 266510 China New Julong Energy Resource Co. Ltd. Juye 274918 China Faculty of Safety Engineering China University of Minlng ＆ Technology Xuzhou 221008 China

According to the characteristics of comprehensive mechanized heading face, established the mathematical model of single-phase air flow with κ-ε two equations model, and have established κ-ε-θ-κp mathematic model to solve two-phase flow of gas and particles in dust space with eulerian-eulerian method and eulerian-lagrangian method. Numerical solution of gas-particle two-phase flow was put forward based on collocated grid SIMPLE algorithm. Moreover, numerical simulation of dust concentration in fully mechanized caving face was carded out by using Fluent software. Finally, when in forced-exhaust ventilation circumstance, drawer type fan drum have less dust absorption, and most of dust spread to the other site; the dust concentration is inversely proportional to the distance from tunneling head, and the dust concentration has already diffused to decrease below 102 mg/m3 at the position ofx=12 m. dust are more focused on relative side（in the range about y from 0 to 2 meter） of roadway space of press-ventilated fan drum, especially between tunneling place and drawer type fan drum; the roadway with road header have a higher dust concentration. These conclusions provide reliable theory basis for the dust prevention in comprehensive mechanized heading face.

关键词： dissolute dust dispersion forced-exhaust ventilation circumstance κ-ε-θ-κp mathematical model comprehensive digging

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Introduction and evaluation of a novel hybrid brattice for improved dust control in underground mining faces: A computational study

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International Journal of Mining Science and Technology 2015年第4期25卷 537-543页

作者： Kurnia Jundika C. Sasmito Agus P. Hassani Ferri P. Mujumdar Arun S. Mechanical Engineering Department Universiti Teknologi PETRONAS Department of Mining and Materials Engineering McGill University

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.

关键词： dust dispersion Hybrid brattice Underground mine Ventilation

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