Differential Gas Drainage Technology for Upper Corner of Working Face by High Position Directional Long Borehole

In the mining process of high gas mining area, the gas emission from goaf is large, which leads to the gas overrun in the upper corner of the working face, and affects the safe mining of the mine. This paper studies the differential drainage of the upper corner gas by high-level directional long bor...

Full description

Saved in:
Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2021-03, Vol.687 (1), p.12180
Main Authors: Huijun, Duan, Shijun, Hao, Yongzhe, Zhao
Format: Article
Language:English
Subjects:
Boreholes
Coal mines
Coal mining
Drainage
Drainage effects
Drilling
Failure analysis
Mining
Work face
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In the mining process of high gas mining area, the gas emission from goaf is large, which leads to the gas overrun in the upper corner of the working face, and affects the safe mining of the mine. This paper studies the differential drainage of the upper corner gas by high-level directional long borehole, and then solves the problem of gas control in the upper corner. Taking a fully mechanized mining face as the research object, this paper analyzes the theoretical parameters of the overlying strata failure of the working face, and according to the production practice, the high position directional long drilling layer is arranged differently, and the influence of high position directional drilling on gas drainage effect in different layers is analyzed, and the best location in different distance and height area is obtained to guide the actual production work. The research results show that the differential drainage method of high position directional long borehole can effectively control the gas overrun in upper corner of fully mechanized mining face in thick coal seam.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/687/1/012180