In-site monitoring and analysis of shaft linings additional strain in failure and formation grouting
More than 100 shaft linings fractured in coal mines of Eastern China region in the past three decades. It is believed that the axial additional force induces the cracking. Based on automatic-monitoring data about over ten shaft linings in recent more than six years, typical evolution curve of shaft linings additional strain was obtained. Especially, the shaft linings additional strain in failure and during formation grouting period was obtained, which points out the curve characters before fracture, in failure, after fracture, in process of formation grouting, in grouting rest and after grouting. Through the comparison analysis of the data it has found that the shaft lining will fracture at strain accumulated to a certain degree when the formation consolidates. The shaft linings fracture makes the strain weak, and the formation grouting makes the shaft linings strain to the full extent. The in-site monitoring data has indicated that the exiting additional force induces the fracture of shaft lining and also showed that the formation grouting in the surrounding soil can make the shaft lining safer. The strain characters and the results are useful for the shaft linings fracture forecast.
In-site test shaft lining additional strain vertical additional force fracture Grouting fracture forecast
Liang Heng-chang Zhou Guo-qing Liao Bo Liu Zhi-qiang Zhou Jin-sheng Zhao Guang-si Shang Xiang-yu Zhang Hou-quan
State Key Laboratory for Geomechanics & Deep Underground Engineering, School of Architecture & Civil Engineering, China University of Mining & Technology, Xuzhou 221008, China
国际会议
The 6th International Conference on Mining Science & Technology ICMST 2009(第六届国际矿业科学技术大会)
徐州
英文
1-9
2009-10-18（万方平台首次上网日期，不代表论文的发表时间）