| In order to solve the shortcoming of traditional explosion w;dge-shaped excavation in Da'anshan Mine, improve the rate of excavation and reduce the consumption of explosive materials, a series of excavation shapes are applied and experimented in the rock tunnel excavate.According to the different rock materials, there are different explosion experiments to be experimented. There are series of excavation shapes experiment and full-field explosion experiment based on the excavation shapes experiment. The pentagon excavation, diamond excavation and spiral excavation are applied in the sandrock tunnel excavation. The analysis of experimental data and the results of experiment proved that the three excavation are apt to use in sandrock tunnel excavation, and the result of explosion is very well and the explosion rate is up to 90%. As to the basalt rock tunnel excavation, the Gronlund shape is alright, the second shape is wedge-pentagon shape and the diamond shape is unsuited for basalt rock. Through the analysis of experimental data and the results of explosion, the explosion rate is up to 85%. In the conglomerate tunnel excavation, the semi-diamond shape can obtain high explosion rate, and the rate is up to 85%. In order to applied the result of experiment study, the multimedia is made and can reappear the achievement of experiment at one's ease. |
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