3# ore cluster is striped mining turn into underground due to exploiting requirement; and the parameters of rock mass mechanics are determined by way of rock structure investigation

sampling

indoor rock mechanics experiment and engineering analogy its aim to reclaiming resource mostly and guaranteeing 3# ore cluster overlying rural road safety operation; then unloading simulation with 3D finite elements is applied based on three exploiting scheme methods; the simulation results are as fellows: the settlement height of road ground surface is increased nonlinearly with increasing height of exploitation; and the more exploiting height

the more settlement height; the height of settlement is 7cm

20 cm

50 cm and 135 cm when exploitation horizon is 1288

1300

1310 and 1320 correspondingly. The stabilization of rock mass would be damaged when exploiting horizon is more than 1300. The settlement height is less than 15 cm by commercial test while exploiting horizon in 1300

which could be guaranteed safety of road operation. The method of applying with synthesis analysis of rock mass mechanics parameters and unloading simulation to analyze rock mass stabilization is effective and feasible by commercial test.