A Coal Burst Mitigation Strategy for Tailgate during Deep Mining of Inclined Longwall Top Coal Caving Panels at Huafeng Coal Mine

Table 4

Rock strata properties used in the numerical modeling.

Lithology	Thickness (m)	Young’s Modulus (GPa)	Poisson’s ratio,	(MPa)	GSI					Dilation angle
Ultrathick conglomerate	-	42	0.22	130	75	21	8.599	0.0622	0.501	1.3
Ultrathick claystone	157.3	25	0.22	65	70	4	1.370	0.0357	0.5010	1.4
Medium-grained sandstone	5.0	56	0.20	100	80	17	8.322	0.1084	0.5010	1.1
Claystone	1.3	25	0.22	65	70	4	1.370	0.0357	0.5010	1.4
1# coal seam	0.7	3.1	0.25	30	60	15	3.595	0.0117	0.5028	2.0
Siltstone	9.5	18	0.23	40	65	16	4.584	0.0205	0.5020	1.5
Fine-grained sandstone	2.2	20	0.22	70	72	17	6.254	0.0446	0.5012	1.5
Medium-grained sandstone	9.7	56	0.20	100	80	17	8.322	0.1084	0.5010	1.1
Siltstone	2.0	18	0.23	40	65	16	4.584	0.0205	0.5020	1.5
Fine-grained sandstone	9.2	20	0.22	70	72	17	6.254	0.0446	0.5012	1.5
Siltstone	2.5	18	0.23	40	65	16	4.584	0.0205	0.5020	1.5
4# coal seam	6.2	3.1	0.25	30	60	15	3.595	0.0117	0.5028	2.0
Siltstone	1.7	18	0.23	40	65	16	4.584	0.0205	0.5020	1.5
Medium-grained sandstone	4.2	56	0.20	100	80	17	8.322	0.1084	0.5010	1.1
Siltstone	4.8	18	0.23	40	65	16	4.584	0.0205	0.5020	1.5
Coarse-grained sandstone	3.5	63	0.18	120	82	18	9.464	0.1353	0.5000	1.1
Fine-grained sandstone	4.8	20	0.22	70	72	17	6.254	0.0446	0.5012	1.5
Medium-grained sandstone	5.2	56	0.20	100	80	17	8.322	0.1084	0.5010	1.1
Siltstone	3.8	18	0.23	40	65	16	4.584	0.0205	0.5020	1.5
Claystone	1.0	25	0.22	65	70	4	1.370	0.0357	0.5010	1.4
Siltstone	8.2	18	0.23	40	65	16	4.584	0.0205	0.5020	1.5