采掘叠加集中应力区的防突措施效果分析

    Effect Analysis of Outburst Prevention Measures in Mining Superimposed Stress Concentration Zone

    • 摘要: 煤层回采工作面会在工作面前方一定范围内形成应力集中区,而在应力集中区进行采掘活动时,会导致集中应力的叠加,容易诱发煤与瓦斯突出事故。以某矿煤巷掘进工作面通过上覆煤层工作面停采线应力集中区为实例,对区域和局部防突措施效果进行了分析,结果表明,在工作面停采线应力集中的影响范围可达周围40 m,尤其是在工作面前方,瓦斯排放钻孔对缓解应力集中影响有明显效果。

       

      Abstract: Coal mining working face will form stress concentration zone within a certain range of working face, and the mining activities in stress concentration zone leads to the concentrated stress superposition, which is easy to induce the accidents of coal and gas outburst. This paper takes a mine coal lane tunneling working face passing through the overlying coal seam working face stop line stress concentration zone as an example, the regional and local outburst-prevention measures effects are analyzed, the results show that in the face of stop line, the effect of stress concentration range is up to around 40 m, especially in front of the working face, gas emission drilling has obvious effect on relieving the stress concentration.

       

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