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Mining thin sub-layer as self-protective coal seam to reduce the danger of coal and gas outburst

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Abstract

In response to the severe situation of coal mine gas disaster in China, a new method of reducing the danger of coal and gas outbursts and improving gas drainage and utilization in coal mines was introduced in this paper. The main idea of this method is to mining thin sub-layer as self-protective coal seam to eliminate or reduce the danger of coal and gas outburst. This method can be implemented by drills along seam and hydraulic jet when the mined seam with a relatively weak risk of coal and gas outbursts is soft or has a soft layer. This method was first applied in the Yian mine to verify its effectiveness. The results of application showed that mining thin sub-layer as self-protective coal seam can effectively eliminate the danger of coal and gas outburst and improve gas drainage and utilization. As this method needs less time and lower cost than conventional protective layer mining, it is of great significance for mining coal seam with the danger of coal and gas outburst.

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Acknowledgments

The author is grateful to the Mutual Funds of Shanxi Province Coal Bed Gas (2012012010), the Dr. Funds of Henan polytechnic university (648708), Yima coal group co., LTD and the postdoctoral workstation of Shanxi jincheng anthracite mining group co., LTD for their support for this project.

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  1. School of Energy Science and Engineering, Henan Polytechnic University, The New Century Road No. 2001, Jiaozuo, 454000, China

    Dingqi Li

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  1. Dingqi Li
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Correspondence to Dingqi Li.

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Li, D. Mining thin sub-layer as self-protective coal seam to reduce the danger of coal and gas outburst. Nat Hazards 71, 41–52 (2014). https://doi.org/10.1007/s11069-013-0898-1

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  • DOI: https://doi.org/10.1007/s11069-013-0898-1

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