摘要
针对近距离含水煤层下半煤岩巷节理、裂隙发育,变形复杂,煤岩交界处易折帮等支护难题,采用理论分析、数值模拟及工程应用的研究方法对近距离半煤岩巷的合理支护方案进行研究,研究表明,回采巷道采用高强稳定型穿煤岩层支护方案时能够保持安全生产需要,巷道围岩位移曲线可分为:Ⅰ为掘进期;Ⅱ相邻工作面采动影响期;Ⅲ本工作面回采影响期;相邻工作面采动影响区又明显的可分为:①影响平缓区;②影响加速区;③影响过渡区;④影响衰减区;⑤影响稳定区,与现场观测曲线类似;数值模拟及工程应用确定,掘进巷道影响围岩变形时间为28d,12313(相邻)工作面采动影响距离为50~56m,12314(本)工作面超前影响距离为20m,研究为同类地质条件矿井提供参考。
Aiming at the supporting problems in the coal-rock roadway under close water-bearing coal seam,such as joints and cracks,complex deformation,and easy to collapse at the coal-rock junction,theoretical analysis,numerical simulation and engineering application research methods are used to study the close-distance coal-rock roadway.Reasonable support schemes are studied,and the research shows that the use of high-strength and stable coal-passing strata support schemes for the mining roadways can maintain safe production needs.The surrounding rock displacement curves of the roadway can be divided into:Ⅰdriving period;Ⅱadjacent working faces mining influence period;Ⅲmining-affected period of this working face;the mining-affected area of adjacent working faces can be clearly divided into:①flat zone;②acceleration zone;③transition zone;④attenuation zone;⑤stable zone,which is similar to the field observation curve;according to the numerical simulation and engineering application,the impact time of surrounding rock deformation by the excavation roadway is 28 days,the impact distance of 12313(adjacent)working face is 50~56 m,and the leading impact distance of 12314(this)working face is 20 m,the research provides a reference for mines with similar geological conditions.
作者
李振
张佳飞
周朋
LI Zhen;ZHANG Jia-fei;ZHOU Peng(Ordos Zhongbei Coal Chemical Co.,Ltd.,Onlos 017000,China)
出处
《煤炭工程》
北大核心
2020年第S01期48-52,共5页
Coal Engineering
关键词
近距离
含水煤层
半煤岩巷
巷道支护
close distance
water-bearing coal seam
coal-rock roadway
roadway support
