Research on monitoring technique and evolution law of the disturbance stress in Chensilou Colliery

This paper outlines the current status of crustal stress measurement,and analyzes the existing problems of hollow inclusion strain stress relief method. Using the hollow inclusion strain cells measurement technique,the evolu- tion of mining dynamic pressure is monitored based on original rock stress measurements. The results show that the di- rection of maximum principal stress is mainly in vertical stress,its peak area changes from initial near-vertical direction to nearly horizontal direction,and then fades to near vertical when closing to the stress-reducing region. The disturb- ance stress increases with the working face advances,and reaches the maximum value at 136 m away from measuring point which is 3. 29 times of the original rock stress,and then it stabilizes. The measurement of original rock stress and disturbance stress provides a theoretical basis for the study of their interaction,and has a guiding significance to the re- search of roadway stability control.