Tehnički vjesnik, Vol. 22 No. 2, 2015.
Izvorni znanstveni članak
https://doi.org/10.17559/TV-20141009065328
Comparison study of "U+L" and "Y+L" working face ventilation patterns on gas control in a highly gassy mine
He Shao
; China University of Mining and Technology, School of Safety Engineering, China University of Mining and Technology, Xuzhou District, Jiangsu Province, P. R. China, ZIP code: 221116
Kai-yan Chen
; China University of Mining and Technology, School of Safety Engineering, China University of Mining and Technology, Xuzhou District, Jiangsu Province, P. R. China, ZIP code: 221116
Hong-mei Zhao
; China University of Mining and Technology, School of Safety Engineering, China University of Mining and Technology, Xuzhou District, Jiangsu Province, P. R. China, ZIP code: 221116
Ming-ming Li
; Department of Mining Engineering, West Virginia University, Morgantown, WV 26505, USA
Sažetak
A mine ventilation system is an important component of an underground mining system. We all know that the ventilation system design plays an important role in highly gassy mines, and the ventilation pattern is the primary factor in gob gas control in fully mechanized working faces. Because the gas emission rate is notably large in highly gassy fully mechanized working faces and the U ventilation pattern seriously restricts normal production, a new ventilation pattern is required. This paper uses a gas flow distribution numerical simulation method to analyze the gas controlling effect of U+L and Y+L patterns. The results indicate that the gas concentration of the U+L ventilation pattern is lower than that of Y+L pattern in a fully mechanized working face and its upper corner. Furthermore, the main ventilation factors that affect the gas drainage of U+L ventilation pattern are optimized through the orthogonal test and fuzzy evaluation method; it effectively reduces the gas concentration of the upper corner and the return airway. After the implementation of the optimal solution of the U+L ventilation pattern in No. 32212(1) working face of Rujigou coal mine of Ningxia Hui Autonomous Region in China, the gas concentration of the upper corner was reduced to 0,6 %, which can ensure the normal production of the coal mine.
Ključne riječi
highly gassy; gas controlling; parameters optimization; U+L ventilation pattern
Hrčak ID:
138108
URI
Datum izdavanja:
22.4.2015.
Posjeta: 2.368 *