Tehnički vjesnik, Vol. 29 No. 4, 2022.
Prethodno priopćenje
https://doi.org/10.17559/TV-20220322090437
Comparative Study on Sealing Technology of Gas Drainage Borehole in Soft Coal Seam
Xiaohua Jin
; School of Energy & Environment, Zhongyuan University of Technology, Zhengzhou 450007, China
Jiyu Zheng
; School of Resources and Safety Engineering, Henan University of Engineering, Zhengzhou 451191, China
Zhihao Lin
; School of Energy & Environment, Zhongyuan University of Technology, Zhengzhou 450007, China
Shunheng Hua
; School of Energy & Environment, Zhongyuan University of Technology, Zhengzhou 450007, China
Sažetak
This paper discusses four kinds of hole sealing technologies for gas drainage in soft coal seam, which are polyurethane hole sealing, cement mortar hole sealing, full-length screen pipe hole sealing and pipe direct connection technology. Through the observation of negative pressure loss, the sealing effect of four sealing technologies is analyzed, the polyurethane sealing effect is poor, the cement mortar, the full-length screen pipe combined with cement mortar and the direct connection technology of pipe are good; through the observation of gas concentration, the gas drainage effect of four sealing technologies is analyzed, the polyurethane sealing technology is the worst, and the direct connection technology of pipe is the worst. The gas drainage effect is the best; according to the sealing effect and gas drainage effect, the traditional polyurethane and cement mortar sealing technology cannot meet the gas drainage demand of the soft coal seam. In the case of slow drilling deformation, the full-length screen pipe sealing technology can be used. In the case of rapid drilling deformation, the direct connection of pipe sealing technology should be used.
Ključne riječi
drilling; gas drainage; hole sealing technology; soft coal seam
Hrčak ID:
279491
URI
Datum izdavanja:
17.6.2022.
Posjeta: 976 *