Research on the Source Mechanism and Source Prevention and Control System of Deep Rock Burst

Table 3

Drill cuttings experimental data statistics table.

Time				Drilling depth							Average
				1	2	3	4	5	6	7
Return roadway	19th Dec. 2017	12.19	Drill cuttings	3.20	3.17	3.00	3.00	2.90	2.93	3.10	3.04
			Drilling rate	1.60	1.40	1.23	1.30	1.18	1.29	1.45	1.35
	4th Jan. 2018	1.4	Drill cuttings	1.80	2.10	2.15	2.00	2.20	2.30	2.10	2.09
			Drilling rate	0.90	0.92	0.88	0.86	0.90	1.01	1.00	0.92
Air inlet roadway	18th Sept. 2017	9.18	Drill cuttings	2.0	2.0	2.2	2.3	2.2	1.7	1.6	2.0
			Drilling rate	1.0	0.88	0.90	1.00	00.90	.075	0.76	0.88
	1st Oct. 2017	10.1	Drill cuttings	1.8	2.1	2.15	2.0	2.2	2.3	2.1	2.09
			Drilling rate	0.90	0.92	0.88	0.86	0.90	1.01	1.00	0.92
	11th Oct. 2017	10.11	Drill cuttings	2.4	2.15	2.35	2.55	2.15	1.9	2.35	2.26
			Drilling rate	1.20	0.95	0.96	1.10	0.88	0.83	1.11	1.00
	12th Nov. 2017	11.12	Drill cuttings	2.0	2.1	2.3	2.3	2.4	2.3	2.1	2.21
			Drilling rate	1.00	0.92	0.94	1.00	0.98	1.01	1.00	0.98