The Application of Crossing and Grid Drainage Boreholes in Floor Tunnel for Coal Roadway Safety Tunneling

Abstract:

In order to reduce the danger of single coal seams outburst during the tunneling in coal roadway and ensure the tunneling of coal seams, this text analyzed the mechanism of crossing drilling against outburst; studied the area measures of floor tunnel crossing and grid drainage boreholes in coal roadway, Designed and optimized the drilling technical parameters; Analyzed the relationship between the drainage concentration and scalar; Calculated the maximum overlying coal seam gas to spare scalar quantity is 224300 m³ ;Used a variety of indicators to investigate the effect of outburst prevention. It shows that Gas content and gas pressure have significant lower than drainage. After the drainage up to standard, all the sensitive indexes is not overrun, during the coal roadway tunneling, it does not appears dynamic phenomenon. Solve the problem of mining imbalances, guaranteed the safety driving of roadway.

• Periodical: Advanced Materials Research (Volumes 962-965)
• Pages: 1169-1174
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.962-965.1169
• Online since: June 2014
• Authors: Hong Qing Zhu, Bei Fang Gu*, Min Bo Zhang, Chao Yu, Zhen Zhang
• Keywords: Crossing Boreholes, Drainage Effect, Gas Drainage, Sensitive Index

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