Carbon dioxide rock breaking device and method

Abstract

The invention discloses a carbon dioxide blasting device. The device comprises an outer pipe, a short sealing cover is arranged at one end of the outer pipe, a long sealing cover is arranged at the other end of the outer pipe, an energy release groove is formed in the long sealing cover, the long sealing cover and the short sealing cover are connected with the outer pipe through threads, one end of a liquid filling pipe penetrates through the short sealing cover and extends into the outer pipe, one end of an exhaust pipe penetrates through the short sealing cover to communicate with the interior of the outer pipe, a thermal excitation device is arranged in the outer pipe, the positive electrode and the negative electrode of the thermal excitation device are electrically connected with a starting power supply through wires respectively, and a switch is arranged on the starting power supply. A carbon dioxide blasting method comprises the steps of drilling a cracking hole, installing the carbon dioxide blasting device, filling liquid carbon dioxide, carrying out blasting and carrying out disposing. According to the carbon dioxide rock breaking device and method, the safety and utilization rate of the carbon dioxide blasting device are improved.

Description

technical field [0001] The invention relates to the technical field of rock blasting, in particular to a carbon dioxide rock breaking device and method. Background technique [0002] Liquid carbon dioxide rock breaking technology is a new type of environmentally friendly rock breaking technology, which belongs to the category of non-explosive blasting rock breaking. It is different from the previous blasting technology using explosives. It uses physical or non-violent chemical methods to generate high-pressure carbon dioxide gas. It installs a carbon dioxide blasting tube in the cracking hole, and then activates the activator to heat the liquid carbon dioxide to instantly expand. High pressure, so as to generate high-pressure air wedge to throw and expand the rock, so as to realize the function of breaking the rock. Carbon dioxide rock-breaking technology does not belong to the category of explosion in the true sense, because only physical reactions occur during the entire ...

AI Technical Summary

Problems solved by technology

During transportation, due to vibration, collision and other factors, the blasting tube is very easy to self-explode, which not only increases the difficulty of transportation, but also poses a great risk

There are also disposable blasting tubes that are filled with liquid carbon dioxide outside the fracturing hole at the blasting site, and then put into the fracturing hole one by one for blasting. The liquid carbon dioxide is filled outside the fracturing hole on site, and the safety risk is still high.

In addition, the commonly used disposable carbon dioxide blasting tube has no weak point, and the high-pressure gas diffuses around the blasting tube, and the blasting pressure is not concentrated, which greatly reduces the rock breaking effect

At present, most of the disposable carbon dioxide blasting tubes are welded by bulky seamless steel pipes, which are heavy, consume a lot of steel materials, and have high costs. It is difficult to transport and install the tubes on site.

[0004] For the reusable carbon dioxide blasting tube, it is made of steel material, which is difficult to process and relatively heavy, so its transportation and installation are also difficult. After blasting, the blasting tube will more or less produce some Bending or even cracks, high post-correction and maintenance costs

For some blasting on cliffs, the blasting pipe falling off the cliff will cause more serious damage, and it will also add a certain degree of difficulty to the later recovery work

[0005] In addition, due to the complexity of the rock mass, due to the compact rock mass or improper setting of excavation parameters, etc., the carbon dioxide fracturing tube has the phenomenon of rejecting explosion in the application of the engineering site, and its safe disposal is also the application of this technology. a problem of

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