The Spatiotemporal Characteristics of Coupling Effect between Roof and Backfill Body in Dense Backfill Mining

Table 1

Material ratio of rock stratum in model.

Serial number	Strata name	Strata thickness/cm	Fine sand/kg	Lime/kg	Plaster/kg	Water/ml
1	Fine sandstone	4	9	0.64	0.64	1028
2	Sandy shale	6	12.5	0.42	0.42	1334
3	Coal seam	3	8	0.7	0.3	900
4	Sandy shale	4	9	0.56	0.56	1012
5	Fine sandstone	9	21	1.5	1.5	2400
6	Sandy shale	7	17	1.49	0.64	1913
7	Medium sandstone	6	14	1.17	1.17	1634
8	Sandy shale	8	18	1.13	1.13	2026
9	Coarse-grained sandstone	12	28	2	2	3200
10	Fine-grained sandstone	10	23	1.44	1.44	2588
11	Carbonaceous shale	6	12.5	0.69	0.69	1388
12	Fine sandstone	8	18	1.29	1.29	2058