Study on In Situ Stress Measurement and Surrounding Rock Control Technology in Deep Mine

Table 1

Drilling design parameters of each measuring point.

Survey point number	Drilling position	Underground depth (m)	Actual drilling parameters
			Large diameter drilling depth (m)	Small diameter drilling depth (m)	Azimuth (°)	Dip (°)
Point no. 1	Chamber for water exploration in the parking lot at the bottom of the first mining area	1085	10	0.4	60	10.5
Point no. 2	In the roadway leading to the auxiliary shaft near the pit bottom parking lot	1089	12	0.4	60	10
Point no. 3	In the tunnel leading to the sump	1089	12	0.4	60	10.5