摘要
深部软岩巷道的应力状态变化极其复杂,巷道开挖后很难找到二次应力状态的分布规律,高应力软岩巷道经常出现严重的底鼓、冒顶和片帮现象,为了找到巷道底板围岩应力的变化规律。通过应用FLAC^(3D)数值模拟软件分析梁家煤矿煤2巷道底板底鼓量的变化规律,在煤2巷道开挖并进行支护后,监测巷道底板下1、2、3、4 m的底鼓量,应用最小二乘法原理进行曲线拟合,通过现场矿压监测结果表明,在煤2巷道地质条件下,拟合出的曲线符合实际巷道底板底鼓量的变化。
Stress variation of deep soft rock roadway after tunnel excavation is extremely complex, it is difficult to find the distribution of stress state; high stress soft rock roadway often appears serious heaving floor, caving and rib spalling phenomenon. In order to find the stress changes of floor rock roadway, we analyze the change laws of heaving floor in Liangjia Coal Mine No. 2 tunnel by using FLAC3D numerical simulation software, after the excavation and supporting in No. 2 roadway, we monitor the amount of heaving floor of 1 m, 2 m, 3 m and 4 m at the roadway floor, and use the principle of least square method for curve fitting. Through the mine pressure monitoring in field, the results show that, in the condition of No. 2 roadway, the fitted curve meets the actual amount of heaving floor of the tunnel.
出处
《煤矿安全》
CAS
北大核心
2016年第5期189-192,共4页
Safety in Coal Mines
基金
国家自然科学基金资助项目(51174128)
教育部新世纪优秀人才支持计划资助项目(NCET-07-0519)
山东科技大学研究生科技创新基金资助项目(YC140322)
关键词
软岩巷道
底鼓
沉降变形
最小二乘法
曲线拟合
soft rock roadway
heaving floor
settlement deformation
least square method
curve fitting
