| 摘要 |
PURPOSE: A bedrock crushing method which is precise and capable of controlling slight vibration and scattering is provided to make use of merits of conventional gunpowder and solve demerits that are not environmentally friendly such as vibration of the ground, noise and windstorm pressure. CONSTITUTION: The bedrock crushing method which is precise and capable of controlling slight vibration and scattering comprises an on-the-spot inspection step of inspecting a bedrock layer(60) to be crushed and surrounding conditions; establishing a crushing plan so as to determine unit combination, detonation method and detonation device applicable to a construction field based on the inspected various data; a test crushing and result analyzing step of analyzing results by performing crushing according to the established plan; selecting detonation method and detonation device based on the analyzed results; selecting a unit combination based on the analyzed results; boring the bedrock layer(60) to be crushed; inserting the selected unit combination into the bored hole; connecting the unit combination in the selected detonation method; a tamping step of tamping the bored hole with stemming materials(6); installing a scattering control mat at the surroundings of the crushed hole considering crushing positions of the bedrock layer(60) and characteristics of the bedrock layer; crushing the bedrock(60) using the selected detonation device so as to detonate the unit combination inserted into the crushed hole; and a field arrangement and result analyzing step of removing the crushed stones and analyzing the crushing results.
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