深部软岩巷道底鼓变形规律研究

Study on deforming rule of bottom drum in deep soft rock roadway

开发深部软岩巷道难度大,因应力状态时常发生改变,并伴随着片帮、冒顶和底鼓等现象的产生,很难探索其二次应力分布规律,本文采用FLAC^3D)数值模拟软件分析巷道底板围岩应力变化情况。以某矿2号煤巷为研究对象,开挖2号煤巷后对其实施必要的支护措施,监测巷道底板底鼓量,将得到的数据运用最小二乘法拟合成曲线图,经过实践检验该曲线图完全符合2号煤巷实际底鼓量变化情况。

Based on changing stress state, mining of deep soft rock roadway was difficult and film, the roof and the bottom drum were always occurred, which was hard to explore distribution of secondary stresses. FLAC^(3D) numeral simulation software was used to analyze stress variation of surrounding rock of roadway floor. No.2 coal roadway was taken as an example, necessary supporting measures were took after mining No.2 coal raodway to monitor size of drum in bottom of lane,and graph was synthesized by least square method, which was proved by practice that the curve was fully consistent with actual bottom drum in No.2 coal roadway.