Dynamic Secondary Borehole-Sealing Method for Gas Drainage Boreholes along the Coal Seam
Joint Authors
Source
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-07-17
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
Under the influence of advanced abutment pressure, the tightness of a borehole is destroyed, so secondary borehole sealing is needed; however, the opportune time for a secondary borehole sealing is unclear.
In addition, current borehole-sealing devices do not have a secondary borehole-sealing functionality.
In this paper, an opportunity election model of secondary borehole sealing was established, and a dynamic secondary borehole-sealing device was developed.
In working face 3908 of the Kaiyuan Coal Mine, an in situ dynamic secondary borehole-sealing test was conducted.
The test results show that the tightness of the boreholes sealed with high-water-expansion slurry is obviously better than that of the boreholes sealed with cement mortar and polyurethane.
When a borehole is destroyed by the peak of the advanced abutment pressure, the secondary borehole-sealing measures can significantly improve borehole suction pressure, gas concentration, and gas drainage amount in the advanced abutment pressure loading stage.
American Psychological Association (APA)
Qin, Wei& Xu, Jialin. 2018. Dynamic Secondary Borehole-Sealing Method for Gas Drainage Boreholes along the Coal Seam. Geofluids،Vol. 2018, no. 2018, pp.1-11.
https://search.emarefa.net/detail/BIM-1157205
Modern Language Association (MLA)
Qin, Wei& Xu, Jialin. Dynamic Secondary Borehole-Sealing Method for Gas Drainage Boreholes along the Coal Seam. Geofluids No. 2018 (2018), pp.1-11.
https://search.emarefa.net/detail/BIM-1157205
American Medical Association (AMA)
Qin, Wei& Xu, Jialin. Dynamic Secondary Borehole-Sealing Method for Gas Drainage Boreholes along the Coal Seam. Geofluids. 2018. Vol. 2018, no. 2018, pp.1-11.
https://search.emarefa.net/detail/BIM-1157205
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1157205