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为提高高位裂隙钻孔抽采采空区瓦斯的效果,必须掌握采空区“三带”特征。在理论分析的基础上,现场考察黄陵2号煤矿107工作面冒落带分布,结果表明:冒落带呈拱形分布,并且沿采空区横向对称,最大冒落高度为19 m。通过Fluent数值模拟方法,得出采空区瓦斯抽采的最佳区域,验证了现场考察冒落带非等值高度的正确性。这表明,在分析采空区“三带”特征时,应考虑冒落高度的非等值性,进而通过理论分析、现场考察、数值模拟等手段得出采空区抽采的最佳区域。
In order to improve the effect of high fissure boreholes gas drainage mined area, we must grasp the goaf “three ” features. On the basis of theoretical analysis, the distribution of 107 caving faces in Huangling No. 2 coal mine was investigated on site. The results show that the caving zone is arched and laterally symmetrical along the goaf. The maximum caving height is 19 m. By Fluent numerical simulation method, the best area of gas drainage in goaf is obtained, and the correctness of non-equivalent height of caving zone is verified. This indicates that when analyzing the characteristics of goaf “three belts”, we should consider the non-equivalence of the height of caving, and then derive the best draw from goaf through theoretical analysis, field investigation and numerical simulation area.