A liquid carbon dioxide cracking tube micro-delay control blasting method

Abstract

The invention belongs to the technical field of mining or quarrying, and provides a liquid carbon dioxide cracking tube micro-delay control blasting method, including: step 1, drilling a predetermined number of blastholes with a predetermined depth in the place to be blasted; step 2, Fill the carbon dioxide fracturing tubes with a certain amount of liquid carbon dioxide; Step 3, place the carbon dioxide fracturing tubes inside the blast hole one by one; Step 4, fill the inside of the blast hole plugging tube with a certain amount of Explosives, and then lock the cover to the blocking tube; step five, set the configured blocking tube in the blast hole; step six, control the carbon dioxide cracking tubes and blocking tubes inside multiple blast holes to detonate one by one according to the order of arrangement; step seven After the detonation is completed, the plugging tube is recovered; the blast hole is sealed by the plugging tube, and the plugging tube can be recycled after blasting, and there is no need to wait for the concrete to dry when using the plugging tube, which can improve the flexibility of construction performance, improve work efficiency.

Description

technical field [0001] The invention belongs to the technical field of mining or quarrying, and in particular relates to a differential delay control blasting method for a liquid carbon dioxide cracking tube. Background technique [0002] The carbon dioxide cracking tube is a kind of phase change that uses liquid carbon dioxide to be heated, and an expansion pressure of more than 150Mpa is generated inside the cracking tube, so that the tube wall is ruptured, and the released high-pressure gas has an impact on the surrounding rock medium, so that the rock occurs. The fracture is loose, and the carbon dioxide emitted by blasting will not produce sparks, and will not cause coal mine gas and coal dust explosion accidents, so it has a wide range of application prospects. The diameter of the blasting hole, then the carbon dioxide cracking tube is placed inside the blasting hole, and then the top of the blasting hole is blocked with a concrete plug, and the blasting is carried out...

AI Technical Summary

Problems solved by technology

[0002] The carbon dioxide fracturing tube is a kind of liquid carbon dioxide fracturing tube that uses liquid carbon dioxide to undergo phase change when heated, and generates an expansion pressure of more than 150Mpa inside the fracturing tube, thereby breaking the tube wall, and the released high-pressure gas has an impact on the surrounding rock medium, thereby causing the rock to crack. The fracture is loose, and the carbon dioxide emitted by the blasting will not produce sparks and will not cause coal mine gas and coal dust explosion accidents, so it has a wide application prospect in China; diameter of the blast hole, and then place the carbon dioxide cracking tube inside the blast hole, and then use concrete plugs to block the top of the blast hole, and blast after the plug reaches its early strength. , and it is necessary to wait for the concrete to solidify before blasting, which is cumbersome and inefficient

Images