岩土力学2018，Vol.39Issue(4)：1422-1430,9.DOI:10.16285/j.rsm.2016.1147
斜孔掏土应力解除法治理煤矿生根井塔偏斜研究
Research on inclined digging technology for deviation rectification of rooting mine shaft tower
摘要
Abstract
To verify the adaptability and effectiveness of inclined digging technology in the rectification of a deviated rooting mine shaft tower in East China,the plastic zone around the inclined hole,the mechanism of the technology,and the influence of various factors on the rectification effect are studied by theoretical analysis,numerical simulation and field measurement.The results show that the radius of the plastic zone is proportional to the diameter of the hole and the stress around circle hole,and it increases with the depth of drilling hole.Drilling can effectively reduce the stress within a certain range of the digging hole,so that the soil around continuously collapses,and then the difference between external load on drilling side and the shaft lining can be reduced,which produces a stress difference with the opposite to promote the shaft tower back to correct.Based on the orthogonal experiment design,we find that the most important factor to influence the deviation is the row width of the drilling,and depth,diameter and the distance between drilling row and shaft centreline.Last,according to the study results,the optimal deviation scheme is designed by long term monitoring of the shaft tower deflection and lining stress,we conclud that this drilling technology is effective in the deviation rectification of rooting mine shaft tower.关键词
应力解除法/井塔/纠偏/井壁监测Key words
stress relieving method/mine shaft tower/rectification/shaft lining monitoring分类
建筑与水利引用本文复制引用
况联飞,周国庆,王建州,朱坤朋,商翔宇..斜孔掏土应力解除法治理煤矿生根井塔偏斜研究[J].岩土力学,2018,39(4):1422-1430,9.基金项目
国家自然科学基金(No.51504245,No.41502271,No.41772338) （No.51504245,No.41502271,No.41772338）
江苏省博士后基金(No.1402009B).This work was supported by the National Natural Science Foundation of China (51504245,41502271,41772338) and the Postdoctoral Sustentation Fund of Jiangsu Province,China (1402009B). （No.1402009B）
