A Novel Experimental Technique to Simulate Shock Behaviour and Bursting Failure of Roadways

Table 1

Further details related to the consequences of rockbursts.

Coal seam no.	Date	Damage range of roadways (m)	Depth of roadway (m)	Description of rockburst damage
17	2011.3.8	180	≥570	A 40 m long section of roadway was almost closed with floor heave 2.2–2.4 m, and convergence of two side walls was 3.2–3.4 m
17	2011.4.13	36	≥570	Maximum convergence of side walls was 1.0–1.8 m, and maximum floor heave was 1.0–1.3 m. The tunnel machine was overturned
17	2011.6.13	10	≥570	The tunnel machines were bounced and shifted to the lower side wall
17	2011.6.26	60	≥570	Floor heave in roadway was 0.8 m
17	2011.9.5	50	≥570	Severe local ejection occurred in coalfaces. Floor heave in roadway was 0.5–1.0 m
17	2011.10.2	40	≥570	Roadway converged to 1–1.5 m
11	2012.5.21	70	≥570	Convergence of two side walls is 1.5–2.0 m. A 20 m long section of the roadway was almost closed
11	2012.6.26	45	≥570	The height of roadway was changed to 0.6–0.8 m, and the width was reduced to about 1 m
11	2012.9.15	35	≥570	A 35 m long section of roadway being excavated was seriously damaged. Convergence of two side walls was 0.5–1.7 m
11	2012.10.15	104	≥670	Convergence of two side walls was 0.5–1.0 m. Roof subsidence was 0.5–1.0 m