吕家坨矿高位钻孔关键参数优化

Key Parameter Optimization of High-level Drilling Hole in Lvjiatuo Colliery

摘要: 对吕家坨矿6373工作面进行数值模拟，根据模拟开采后顶板垮落的情况，确定“竖三带”的结果，并结合经验公式的计算结果，综合判定吕家坨矿6373回采工作面开采后，垮落带高度约为9.2m，裂缝带高度约为30.8m。经过参数的优化设计高位钻孔有效抽采浓度整体得到提高，说明高位钻孔瓦斯抽放参数优化准确可靠，能有效提高钻孔瓦斯浓度，达到降低采空区瓦斯浓度的目的。

Abstract: Applying numerical software to simulating roof caving after mining and referring to calculation with empirical formula，“three-zone”distribution of 6373 mining face was obtained.Caving zone height was about 9.2m and fissure zone height was about 30.8m.Effective methane drainage concentration wholly increased after parameter optimization of high-level drilling hole，which showed that optimization result was reliable.