Underground mine laneway engineering or ore breaking engineering dust fall water pressure blasting process
A hydraulic blasting and engineering technology, which is applied in blasting, mining equipment, tunnels, etc., can solve the problem of less application in blasting, and achieve the effects of reducing the amount of explosives, reducing ventilation costs, and reducing dust concentration
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specific Embodiment 1
[0022] Specific embodiment 1: design scheme of excavation engineering hydraulic blasting test
[0023] a. The original status of the project:
[0024] The cross-section of the excavation roadway is 2.8×2.6 meters, the diameter of the blast hole is 42mm, and the depth of the blast hole is 2.8 meters. The barrel-shaped cutting method is adopted, and the number of cutting holes is 7, including 6 throwing holes (hollow holes), 1 drug-filling hole, 11 peripheral holes, 15 auxiliary holes, and a total of 33 holes. Choose 2# rock emulsion explosives, the diameter of the cartridge is 3cm, the length of the cartridge is 33cm, and the mass of a single cartridge is 0.3kg. Each blasthole is charged continuously, No. 28 and No. 29 blastholes are blocked, and the rest of the blastholes are not blocked. The detonation uses the detonator to detonate the nonel to detonate, and uses the differential detonator to control the detonation sequence. The detonation sequence is: cut hole, auxiliary ...
specific Embodiment 2
[0028] Concrete embodiment 2: drop ore project hydraulic blasting test design scheme:
[0029] 1. The original status of the project:
[0030] The roof of the gold mine stope is controlled by an arch, the depth of the blasthole is 2.8m, and the blasthole is generally "quincunx-shaped". The distance between the top plate control blastholes is 0.5-0.6m, the distance between the second row of blastholes is 0.4-1.7m, the distance between the third row of blastholes is 1.8-1.9m, the distance between the roof control blastholes and the second row of blastholes is 0.5-0.6m, and the distance between the second row of blastholes is 0.5-0.6m. The distance between the second row of blastholes and the third row of blastholes is 0.6-0.7m, and the minimum resistance line is 0.8m. The charge volume of the blast hole controlled by the top plate is 2 rolls, and the charge at intervals is adopted. Two nonel tubes are detonated.
[0031] 2. Design plan:
[0032] The blasthole distribution, bl...
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