Explosive model construction method based on equivalent radius of phase transition and fracturing of liquid carbon dioxide

Abstract

The invention discloses an explosive model construction method based on equivalent radius of phase transition and fracturing of liquid carbon dioxide. The explosive model construction method includesthe steps: calculating explosion energy released when phase transition and fracturing of pseudo-equivalent single-hole liquid carbon dioxide occurs; based on the equal explosion energy, enabling the phase transition and fracturing explosion source of the single-hole liquid carbon dioxide to be equivalent to an explosive explosion source of single-hole columnar coupling charging, and determining the equivalent mass of the selected explosive type; calculating the radius of the broken zone of the coal body after phase transition and fracturing through the liquid carbon dioxide; and solving the radius of the fracture zone of the coal body after phase transition and fracturing of the liquid carbon dioxide, and obtaining the charge radius and the charge height of the equivalent explosive model according to the above steps. The explosive model constructed by the explosive model construction method has the same explosive energy as the equivalent phase transition and fracturing model of the liquid carbon dioxide, has the same range of fracturing radius, and has high operability when using the equivalent explosive model to carry out further theoretical or numerical simulation analysis on thephase transition and fracturing mechanism of the liquid carbon dioxide.

Description

technical field [0001] The invention belongs to the technical field of carbon dioxide phase transition cracking, and in particular relates to a method for constructing an explosive model based on the equivalent of liquid carbon dioxide phase transition cracking radius. Background technique [0002] Compared with traditional explosive chemical blasting, the phase change blasting fracturing technology of liquid carbon dioxide has the advantages of high safety, simple process, strong controllability and good fracturing effect. The anti-reflection effect and gas drainage efficiency have been widely used. The mechanism of high-pressure gas cracking is still in the exploratory research stage. At present, there is no unified theoretical model to systematically analyze and accurately quantitatively evaluate the energy consumption, damage evolution process and cracking effect of carbon dioxide phase transition cracking of gas-bearing coal. Because the explosion mechanism of explosiv...

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Problems solved by technology

The fracturing process of liquid carbon dioxide physical blasting is obviously different from the characteristics of explosive chemical blasting fracturing process. Simply equivalent to energy or volume equivalent only focuses on one of the characteristics, and the equivalent explosive model cannot accurately analyze the coal seam Fracturing anti-reflection effect that is the most concerned in the field of fracturing

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