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| Study on the Effect of Hydraulic Extrusion in Deep Coal Bed owned High Gas and Low Permeability |
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Received:June 17, 2013
Revised:June 19, 2013
Accepted:June 20, 2013
Published Online:May 28, 2014
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| DOI： |
| KeyWord:Hydraulic extrusion; Outburst coal seam; Outburst prevention measure; Effect examination |
| Author | Institution |
| LI Zhen |
The Faculty of Land Resource Engineering,Kunming University of Science and Technology |
| XIE Xian-ping |
The Faculty of Land Resource Engineering,Kunming University of Science and Technology |
| ZHANG Xiao-nan |
School of Energy and Safety, Anhui University of Science and Technology |
| WANG Yan-bo |
The Faculty of Land Resource Engineering,Kunming University of Science and Technology |
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| Abstract: |
| Described the technological process, layout of drill hole and equipment selection of injection system for hydraulic extrusion, investigate the change of coal bed stress before and after water-injection while effective influence scope of drills, analyzed Sfeature and regular of gas emission before and after hydraulic extrusion. The results show that it enhanced coal seam permeability effectively and reduced gas stress to take hydraulic extrusion in deep high gas and low permeability coal , decreased gas emission and emission rate which present significant effect in preventing outburst. |
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