Gaseous phase fracturing device

Abstract

The invention provides a gaseous phase fracturing device. The device can be used for regulating pressure and blasting speed, and comprises a buffer, a snifting valve, a supercharging device, an inflation valve, a fracturing pipe, a sealing ring and a shear plate, wherein the inflation valve and the snifting valve are connected to two end parts of the fracturing pipe through seal threads; the inflation valve comprises a valve and an electrode, the valve is opened and closed to realize the filling of the gaseous phase fracturing device, the electrode is connected with a main hole, and high pressure sealing is realized through the threads and a sealing gasket; meanwhile, a high-performance insulating material and the inflation valve are insulated from each other. The gaseous phase fracturing device is used for fracturing a pre-mining coal bed, increasing fractures of the coal bed and driving gas adsorbed by the coal bed, so that the gas is convenient to extract and the coal and gas outburst risk is eliminated. During use, open fire is avoided, and open fire explosion generated by the traditional detonator and dynamite blast is avoided. The device has the characteristics of safety, high efficiency, simple management and the like.

Description

technical field [0001] The invention belongs to the technical field of comprehensive management of underground gas in coal mines, in particular to the technical field of outburst elimination and rapid gas drainage, and relates to a device for fracturing a coal seam to relieve pressure and increase permeability before gas drainage. Background technique [0002] With the increase of coal mining depth, the amount of gas emission also increases, and the number of high-gas mines increases, especially in coal mines with poor coal seam permeability and strong gas adsorption, which makes it difficult to carry out gas extraction, and it is difficult to achieve the national gas control "16 The core standard of "draining up to standard" in the "Word Policy" poses a huge threat to the safe production of coal in my country and seriously restricts the sustainable development of the coal industry. [0003] Strengthening coal seam fissures, improving coal seam gas permeability, and then incr...

AI Technical Summary

Problems solved by technology

However, due to some characteristics of explosives, its fracturing effect is not good or it is not suitable for use in coal mines

[0005] Hydraulic fracturing is another coal seam fracturing method that has been tried and explored in recent years. Like explosive blasting fracturing, this method increases coal seam fractures and drives gas to desorb. It has certain effects, but there are also Disadvantages of hydraulic fracturing, such as slow boosting pressure and easy to produce cross-flow phenomenon during fracturing

[0006] Due to the limitations of the above two fracturing methods, most of the coal mines currently engaged in gas drainage do not conduct coal seam fracturing, but use high-density drilling to extract gas. Due to the limitation of coal mine geological conditions, drilling is very difficult. Difficult to fight, even so, the gas cannot be pumped out as soon as possible, and the cost of pumping is too high

[0007] From the current point of view, although my country has invested heavily in organizing professional teams to research and develop coal seam fracturing, there has been no breakthrough at present, and it is still a key technical problem for gas control in the coal field in my country.

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