Experimental Investigation on the Mixture Ratio and Diffusion Performance of Grouting Materials for Water Bursting Prevention in Coal Mines

Table 2

Results of performance in the formula of L₁6(45).

Material ID	Index
	D1	D2	D3	D4	D5	D6	D7	D8	D9	D10	D11
	Density (g/ml)	Viscosity (MPa·s)	Bleeding ratio (%)	Presetting time (h)	Final setting time (h)	Compressive strength (3 days, MPa)	Compressive strength (7 days, MPa)	Compressive strength (14 days, MPa)	Permeability (15 days, 10^−3μm^2)	Compressive strength (28 days, MPa)	Permeability (28 days, 10^−3μm^2)
S1	1.505	Drip	7.0	8.50	16.50	6.719	7.256	8.653	1.30	12.24	0.86
S2	1.490	Drip	6.0	6.75	15.00	4.570	7.698	8.482	1.28	10.95	0.72
S3	1.497	Thick	1.8	8.00	16.50	2.127	4.439	5.513	1.25	5.21	0.71
S4	1.445	Thick	0.6	5.50	13.25	1.172	2.297	2.109	1.24	2.13	1.23
S5	1.418	157.8	8.2	10.50	21.00	3.340	5.716	5.029	1.23	10.80	0.71
S6	1.377	153.5	18.2	11.75	21.50	3.377	5.210	8.36	1.17	14.10	0.72
S7	1.386	Thick	0.8	10.00	18.00	1.052	2.157	3.075	1.12	2.62	1.07
S8	1.363	280	16.0	14.00	24.50	1.392	2.962	3.914	1.31	2.48	1.07
S9	1.201	62.4	19.8	13.25	25.00	0.660	1.576	2.926	1.35	2.69	0.77
S10	1.143	87.38	10.0	13.75	24.50	0.338	0.816	1.356	1.87	1.85	0.84
S11	1.223	9.27	51.4	15.50	27.50	2.798	4.322	3.718	1.29	9.68	0.67
S12	1.213	25.67	43.8	17.50	30.50	1.043	2.057	5.375	1.27	3.43	0.74
S13	1.169	14.67	54.4	13.75	31.50	0.206	0.785	1.087	2.41	1.18	0.73
S14	1.147	13.42	40.8	14.50	34.00	0.380	0.794	1.402	2.01	1.32	1.59
S15	1.111	9.06	59.4	15.50	35.00	0.753	1.793	3.567	2.24	4.11	0.73
S16	1.010	6	64.2	19.50	39.00	1.264	3.020	4.163	2.28	8.31	0.70