A Mathematical Method for Determining Optimal Quantity of Backfill Materials Used for Grounding Resistance Reduction

Table 1

The values of the determined and parameters and the “knee” point coordinates for various resistivities of backfill material, for the considered case.

(Ωm)			(m^3)	(%)
0	5.48	109.43	3.87	33.17
2.5	5.39	109.43	3.80	32.51
10	5.11	109.69	3.61	30.58
30	4.41	110.96	3.11	25.77
50	3.74	112.39	2.63	21.28
100	2.14	115.67	1.51	11.06
150	0.60	118.42	0.42	2.37