摘要
深部软岩巷道的底臌量具有时间效应,巷道开挖后,其底板位移量由巷道底板产生的瞬时弹性变形和流变变形组成。根据黏弹性Burgers流变模型对巷道底板进行流变分析和研究,推导出巷道底板在流变作用下位移量随时间变化的函数u(t)。结合工程实例,采用FLAC^3D数值模拟软件对玉华煤矿2401运顺掘进工作面进行数值模拟分析,得出不同时间由于流变而引起的巷道底板的位移量,并根据数值模拟结果和推导函数u(t)反算出蠕变参数,现场观测结果表明,由于流变因素产生的底臌量占巷道总底臌量的37.97%;在巷道开挖60d以后,底板的位移量才逐渐达到收敛状态,这对深部软岩巷道底臌现象的治理具有重要指导意义。
The floor heave of deep soft rock roadway had a time effect.After roadway excavation,its displacement was composed of instantaneous elastic deformation and rheological deformation generated by roadway floor.Based on the Burgers viscoelasticity model,the rheological analysis and research on roadway floor were carried out.The function u(t)of displacement of roadway floor changing with time under rheological action was deduced.Combined with engineering examples,FLAC^3D numerical simulation software was used to conduct numerical simulation analysis on roadway in Yuhua coal mine,and the displacements of roadway floor caused by rheology at different time were obtained.The creep parameters were calculated according to the numerical simulation results and the function u(t).The field observation results showed that the floor heave due to rheological factors accounted for 37.97% of the total floor heave in the roadway.The displacement of floor gradually converged after 60 days of roadway excavation,which had an important guiding significance for the governance of floor heave in deep soft rock roadway.
作者
谷拴成
王兴明
周琪
GU Shuancheng;WANG Xingming;ZHOU Qi(School of Architecture and Civil Engineering,Xi’an University of Science and Technology,Xi’an,Shaanxi 710054,China;Xi’an University of Finance and Economics,Xi’an,Shaanxi 710054,China)
出处
《矿业研究与开发》
CAS
北大核心
2019年第12期94-99,共6页
Mining Research and Development
基金
国家自然科学基金资助项目(51508462,11402195)
