Study on the Mining Induced Stress of Hard Surrounding Rock under Dynamic Pressure

Abstract:

There is a series of features of the strata-pressure behavior of hard surrounding rock which is affected by dynamic pressure, such as the caving of the roof is difficult, sudden and large-area. In this paper we focus on the mining and support of 14^-1103 working face, In view of the problems of the mine such as the roof is hard to caving, the suspension-area is huge and the safe of the working face is under a great threat, theoretical analysis and field monitoring is used in the study of the strata-pressure behavior. The study indicates that the influence of the advance on the surrounding rock stress is in the range of 100m, the scope in which the surrounding rock stress is remarkably affected is 20~30m; the stress of the surrounding rock is more affected in the scope of fault; the growing time of the roof stress is 2~3 days and is much shorter than the time of roadway’s sides which is 5~9 days.

• Periodical: Advanced Materials Research (Volumes 941-944)
• Pages: 2565-2569
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.941-944.2565
• Online since: June 2014
• Authors: Ji Ping Liu*, Shao Jian Zhan, Yun Peng Guan, Li Jing Chuan, Jun Tang, Hong Wei Wang
• Keywords: Dynamic Pressure, Field Test, Hard Surrounding Rock, Strata-Pressure Behavior

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