Numerical Simulation and Optimization of Hole Spacing for Cement Grouting in Rocks

Table 3

Statistical distribution of permeability rate after grouting in Stage 9 at different distances.

Distance/m	Permeability rate of average/Lu	Variance	Coefficient of variation	Maximum/Lu	Minimum/Lu	Probability less than 1 Lu/%
0.1	0.3044	0.0166	0.0545	0.3428	0.2684	100%
0.2	0.3029	0.0166	0.0548	0.3419	0.2667	100%
0.3	0.301	0.0166	0.0552	0.3405	0.2647	100%
0.4	0.2986	0.0166	0.0556	0.3386	0.2623	100%
0.5	0.3008	0.0215	0.0715	0.3976	0.2596	100%
0.6	0.3121	0.0284	0.0910	0.3967	0.261	100%
0.7	0.3372	0.0409	0.1213	0.4859	0.2703	100%
0.8	0.3856	0.0607	0.1574	0.716	0.2887	100%
0.9	0.4626	0.0895	0.1935	0.9654	0.3131	100%
1.0	0.5848	0.1182	0.2021	1.0492	0.3098	98.77%
1.1	0.7047	0.1459	0.2070	1.2203	0.3818	97.53%
1.2	0.8611	0.1724	0.2002	1.428	0.448	85.19%
1.3	1.1571	0.2501	0.2161	2.1088	0.7335	32.10%
1.4	1.4857	0.315	0.2120	2.9922	0.8091	2.47%
1.5	1.8819	0.4215	0.2241	3.506	0.8186	1.23%
1.6	2.4183	0.5183	0.2143	4.2533	1.4244	0%