Numerical Simulation of Split-Hopkinson Pressure Bar Tests for the Combined Coal-Rock by Using the Holmquist–Johnson–Cook Model and Case Analysis of Outburst

Table 1

Affecting statistics.

Velocity (ν/m·s^−1）	Specimen number	Specimen size D × L (mm × mm）	Sandstone: coal: sandstone combination ratio	Maximum strain rate (/s^−1）	Destructive strain (εb/10^−3）	Σmax (Mpa）	Destruction
5.008	MY1	75 × 40	1 : 1 : 1	126.97	10.2	12.70	Broken
5.712	MY2	75 × 40	1 : 1 : 1	143.98	14.2	18.23	Broken
6.371	MY3	75 × 40	1 : 1 : 1	162.56	12.2	21.98	Broken
6.754	MY4	75 × 40	1 : 1 : 1	170.66	13.3	25.21	Broken
7.222	MY5	75 × 40	1 : 1 : 1	173.48	16.4	30.06	Broken
4.590	MY12	75 × 40	2 : 1 : 1	110.41	12.4	8.65	Broken
5.062	MY11	75 × 40	2 : 1 : 1	121.93	10.7	10.64	Broken
6.136	MY10	75 × 40	2 : 1 : 1	150.53	10.4	19.24	Broken
6.205	MY9	75 × 40	2 : 1 : 1	150.07	9.8	24.43	Broken
7.165	MY8	75 × 40	2 : 1 : 1	174.26	14.0	19.69	Broken
7.671	MY7	75 × 40	2 : 1 : 1	184.01	16.3	35.28	Broken
6.660	MY13	75 × 40	1 : 1 : 2	158.03	10.3	32.25	Broken
7.140	MY14	75 × 40	1 : 1 : 2	179.00	10.5	11.78	Broken
7.584	MY15	75 × 40	1 : 1 : 2	178.48	12.9	36.46	Broken
8.093	MY16	75 × 40	1 : 1 : 2	195.49	10.4	17.75	Broken
8.022	MY17	75 × 40	1 : 1 : 2	186.91	14.2	43.24	Broken
8.791	MY18	75 × 40	1 : 1 : 2	192.42	11.8	23.34	Broken
5.880	MY23	75 × 40	1 : 2 : 1	149.79	9.0	15.10	Broken
6.508	MY19	75 × 40	1 : 2 : 1	162.62	8.0	15.30	Broken
7.054	MY20	75 × 40	1 : 2 : 1	171.24	13.5	14.02	Broken
7.465	MY21	75 × 40	1 : 2 : 1	182.30	12.4	22.41	Broken
8.200	MY22	75 × 40	1 : 2 : 1	192.42	14.0	27.10	Broken