Title :
Numerical Simulation of Gas Migration Regularity under Different Periodic Step Distance in Goaf
Author :
Zhang Yinghua ; Fu Mingming ; Gao Yukun ; Zhao Qian ; Huang Zhian ; Zhou Peiling
Author_Institution :
Key Lab. of the Minist. of Educ. About Metal Mine Efficient Min. & Safety, Univ. of Sci. & Technol. Beijing, Beijing, China
Abstract :
This paper construct a profile model with length and height of 40 m and 9 m respectively based on the two most difficult problems which are mine pressure and gas control to simulate the migration law of gas within the period weighting step of 15m, 20m, 25m in the three areas (0-6m, 6-12m, and after the region of 12m). The results show that the gas migrates to the workplace closing the not caving roof or to the direction of goaf closing the roof stope, as well as bypassing upward migration triangle which rotate the free direction of plate along the negative plate with different period weighting step. Three periods of pressure have same influence on the trend of gas migration to the same zone, but the migration intensity is different. This research state that the velocity magnitude and direction of gas in the goaf is different and it also indicates the migration law of gas in the goaf.
Keywords :
chemical analysis; flow simulation; geotechnical structures; mining; numerical analysis; roofs; caving roof; gas control; gas migration intensity; gas migration regularity; goaf; mine pressure; negative plate; numerical simulation; periodic step distance; size 40 m; size 9 m; upward migration triangle; velocity magnitude; Atmospheric modeling; Coal; Face; Fluid flow; Numerical models; Numerical simulation; Rocks; collision; migration; rotary caving; to-and-fro movement;
Conference_Titel :
Intelligent Computation Technology and Automation (ICICTA), 2014 7th International Conference on
Conference_Location :
Changsha
Print_ISBN :
978-1-4799-6635-6
DOI :
10.1109/ICICTA.2014.101
