Study on Monitoring Rock Burst through Drill Pipe Torque

Table 1

Loading and drilling conditions of the samples.

Sample; number	Loading; pressure/kN	Coal stress/MPa	Coal strength/MPa	Drilling speed/m/min	Drilling time/s	Drilling depth/mm
1	1500	6.0	15	0.22	120	440
2	2000	8.0	15	0.22	120	440
3	2500	10.0	15	0.22	120	440
4	3000	12.0	15	0.22	120	440
5	3500	14.0	15	0.22	120	440
6	2500	10.0	7	0.4	60	400
7	2500	10.0	10	0.4	60	400
8	2500	10.0	15	0.4	60	400
9	2500	10.0	19	0.4	60	400
10	2500	10.0	24	0.4	60	400
11	2500	10.0	15	0.15	192	480
12	2500	10.0	15	0.2	144	480
13	2500	10.0	15	0.3	96	480