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。
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.
出处
《煤矿开采》
北大核心
2014年第3期118-120,共3页
Coal Mining Technology
基金
河北省科技计划项目(12214511)
唐山市科技计划项目(12130271b)资助
矿山热动力灾害与防治教育部重点实验室基金资助课题(JSK200211
JSK200210)
关键词
高位钻孔
参数优化
瓦斯抽采
数值模拟
high-level drilling hole
parameter optimization
methane drainage
numerical simulation
