Back Analysis of Geomechanical Parameters Using Hybrid Algorithm Based on Difference Evolution and Extreme Learning Machine

Table 1

The results of orthogonal scheme numerical calculation.

Test number	Top arc subsidence/mm	Convergence/mm	Inner displacement	Top arc pressure/KPa	Arc shoulder pressure/KPa	Arc waist pressure/KPa
Test 1	−33.112	54.392	20.963	−73.8	−94.9	−57.4
Test 2	−23.235	27.456	11.125	−71.7	−101.7	−59.7
Test 3	−18.980	18.053	7.123	−75.4	−122.4	−62.6
Test 4	−16.789	13.146	4.241	−78.8	−125.9	−65.8
Test 5	−15.903	11.357	3.052	−79.5	−128.2	−68.1
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