Experimental research on using approximate horizontal long-hole instead of closed high extracted roadway to drain gas

In this paper,the experimental instance of using approximate horizontal roof long-hole to drain gas was introduced.The geological spot,the mechanism,the drilling technology with extraction-effect were contrasted and analyzed. The practicability of using long-hole to drain gas was testified.And reasonable drilling technology has been summed up.It provided reliable technique and theoretical foundation to popularize the gas drainage's new technique of 'Long-hole Instead of Roadway'.