System and method for gas intelligent extraction

Abstract

The invention discloses a system and a method for gas intelligent extraction. A drill hole is provided with a gas detonation device. The gas detonation device is connected with a hollow telescopic steel pipe. The telescopic steel pipe is communicated with the gas detonation device. The lower end of the telescopic steel pipe is provided with a blocking steel plate used to block the drill hole. A sealing layer formed by a blocking bag is arranged below the blocking steel plate. The telescopic steel pipe on the blocking steel plate is provided with telescopic rubber end caps. The telescopic rubber end cap and the blocking steel plate form a blocking cavity. The telescopic rubber end caps are provided with dust precipitating covers. Each dust precipitating cover is provided with a connecting line. Through arrangement of the gas detonation device, detonation in the drill hole is performed, thereby improving permeability of coal body and extraction rate of gas. Through arrangement of the telescopic steel pipe, adjustability of the steel pipe is enhanced, blasting depth is flexibly controlled, and the system is convenient to carry. Through the arrangement of the telescopic rubber end caps, a drill hole tip is sealed, preventing slurry from flowing out.

Description

technical field [0001] The invention relates to the field of gas drainage in high-gas mines, in particular to an intelligent gas drainage system and method based on gas explosion technology and an autonomous dynamic hole sealing device for drilling. Background technique [0002] At present, gas explosion accidents are one of the biggest threats to coal mine safety in my country, and gas drainage is the main way to control gas disasters. Borehole drainage is widely used in the field of gas drainage. The operation is simple and quick, and the use value is high. However, there are many problems in this drainage method, such as poor sealing effect of drilling holes, and gas drainage in low- and medium-concentration gas mines. Low recovery rate, low gas purity, high dust content, etc., and these factors often lead to a general reduction in gas recovery rate and utilization rate. Therefore, improving the sealing effect of boreholes and the concentration of gas drainage are the ke...

AI Technical Summary

Problems solved by technology

However, the formed solid is easy to loosen after a long period of gas drainage, and cannot achieve a good sealing effect

Although hydraulic fracturing technology can improve the permeability of coal body and increase the concentration of gas drainage to a certain extent, it has higher requirements for hole sealing technology and is less practical.

Images