Pressure released and outburst prevention technology of seam gateway driving in deep single serious outburst seam
Meng Xianzheng
Wang Zhonghua
Chen Guohong
Zhang Yongjiang
Abstract：In order to elininate the outburst danger of a mine seam gateway driving in the deep mine single serious outburst seam,the paper theoretically analyzed the outburst composite energy and mechanics features of the deep seam gateway and provided the pressure released and outburst prevention technology of the pre-heading floor rock roadway.The numerical simulation in combination with the actual Fengcheng Mining Area was applied to determine the pre-heading floor rock roadway should be located at 8 ～ 12 m underneath of the seam gateway to be driven.The practices showed that the pressure released and outburst prevention effect of the pre-heading floor rock roadway was remarkable,the max displacement of the surrounding rock was 4.1 cm,the partition cracking phenomenon occurred in the surrounding rock and there were four cracking zones generally.The initial gas flow of per meter borehole and the permeability coefficient of the seam could be 14.39 and 55.70 times higher than the insitu seam,the gas drainage density was improved by 5 times and the gas drainage volume of a single borehole was improved by 10 times.There was no over limit phenomenon occurred in the effective inspection index of the seam gateway,the driving speed of the seam gateway was improved from 40 m/month to 100 m/month,and the safety and rapid driving of the seam gateway was realized,and could provide important reference significances to the mines with the similar conditions.
Keywords：single serious outburst seamdeep seam gateway outburstcomposite energypre-heading floor rock roadwaypressure released and outburst prevention
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 75-80 )