Distribution of Side Abutment Stress in Roadway Subjected to Dynamic Pressure and Its Engineering Application

Figure 1

Layout of the side abutment stress observation station. represents the distance of the first borehole stress-meter to the coalface, which should be larger than the scope of influence of the front abutment stress; represents the number of the observation station; represents the length of the borehole stress-meter, which is in general 1~2 m; represents the space between the boreholes, which is in general 2~3 m.