摘要
以神东煤炭集团保德煤矿8#煤层为工程背景,以现场勘察、测试数据为基础,发现了81306二号回风巷顶板破坏边界为拱形,且巷道顶板表现为非对称变形,采用数值模拟软件建立模型,模拟了回采巷道顶板在回采工作面推进过程中竖直方向应力变化,并且监测了顶板变形下沉的位移量,结果表明,回采巷道的变形特征与滞后回采工作面距离有密切关系。
Based on the engineering background of 8#coal seam in Baode coal mine,and according to the site investigation and test data,the roof damage boundary is arched in No.2 air return way of 81306 working face,and the roof deformation is asymmetric.A model is established using numerical simulation software(FLAC3D),the vertical stress on roadway roof is simulated during advancing process of mining face,and the displacement amount of the roof sinking is monitored,the results show that,roadway deformation characteristics is closely related to the distance between the roadway and working face.
出处
《煤炭工程》
北大核心
2016年第S1期82-85,共4页
Coal Engineering
关键词
顶板变形
非对称变形
顶板位移量
数值模拟
roof deformation
asymmetric deformation
roof displacement amount
numerical simulation
