The numerical simulation on the regularity of dust dispersion in whole-rock mechanized excavation face with different air-draft amount
The k-e equation and the k-ε-Θ-kp equation established with eulerian-eulerian method and eulerian-lagrangian method were used to build the mathematical model of solving single-phase air flow in whole-rock mechanized excavation face and two-phase flow of gas and dust particles. Moreover, based on collocated grid SIMPLE algorithm, using FLUENT software, this paper simulated the pressure distribution of air-flowing field in whole-rock mechanized excavation face with different air-draft amount and dust dispersion. The result shows that the differential pressure value is becoming bigger and bigger between extraction fan drum and ambient environment, de-dust ability of extraction fan drum is gathering strength, pervasion intensity of producing dust is continuously decreased in tunneling place, the mean dust concentration of driver position and whole section was decreased 51.28％ and 56.51％ respectively, and diffusion distance of high dust concentration has reduced from 13.6m to 8.5m, when the air draft volume changed from 320m3/min to 600m3/min. Comparing with measuring results of the experiment, the dust concentration of simulation value and the fact value are basically identical in measuring points work face. All these suggest that the simulation results have good reflection.
k-ε-Θ-k equation whole-rock mechanized excavation face air-draft dust the numerical simulation
NIE Wen CHENG Wei-min ZHOU Gang ZHAO Shan-shan YAO Yu-jing
Key laboratories of coal mine disaster prevention and control,College of Resources and Environmental Engineering, Shandong university of science and technology, Qingdao 266510, China
国际会议
The First International Symposium on Mine Safety Science and Engineering (首届矿山安全科学与工程学术会议)
北京
英文
1076-1086
2011-10-27（万方平台首次上网日期，不代表论文的发表时间）