Multi-stage segmented grouting and plugging device for gas extracting and drilling, and sealing method thereof

Abstract

The invention relates to a multi-stage segmented grouting and plugging device for gas extracting and drilling. The multi-stage segmented grouting and plugging device for gas extracting and drilling comprises an air inflation bag, a water return pipe and a grouting pipe, and is characterized in that the air inflation bag is a cylindrical air inflation bag; multiple annular grouting grooves are formed in the external periphery of the cylinder of the air inflation bag in a concave way; bulge sections at two ends of the multiple annular grouting grooves are grouting isolation tables; an inflationinlet is formed in one end of the air inflation bag; water return valves are fixedly arranged on the inner walls of the upper parts of the multiple annular grouting grooves in a sealing way; the frontend of the water return pipe is inserted into the air inflation bag; the water return pipe is connected with the multiple water return valves; explosion valves are fixedly arranged on the inner wallsof the lower part of the multiple annular grouting grooves in a sealing way; the front end of the grouting pipe is inserted into the air inflation bag; and the grouting pipe is connected with the multiple explosion valves. The multi-stage segmented grouting and plugging device for gas extracting and drilling provided by the invention is simple in structure, simple and convenient to operate, low in cost and excellent in performance, and has outstanding technological advantages and wide popularization and application prospect.

Description

technical field [0001] The invention belongs to the technical field of underground gas drainage borehole sealing in coal mines, and in particular relates to a multi-stage segmented grouting plugging device and a sealing method for mine gas drainage boreholes. Background technique [0002] Gas accident is one of the most serious natural disaster accidents in my country's coal mine safety production. As early as the 1950s, gas drainage was listed as an important measure to control coal mine gas disasters in my country, and it was popularized and applied in high gas mines and coal and gas outburst mines. After decades of development, my country's gas drainage technology has made remarkable progress, and has played a vital role in the process of controlling coal mine gas and preventing gas accidents. However, at present, the gas extraction rate and gas extraction concentration of many mines in my country are still not up to the standard. In addition to insufficient basic work o...

AI Technical Summary

Problems solved by technology

The above-mentioned hole sealing methods are widely used in various mining areas in my country, but due to the limitations of technology, materials and equipment performance, the hole sealing effect is not satisfactory.

Therefore, it is urgent to develop a new technology and equipment for high-efficiency plugging of gas drainage boreholes to solve the problems of effectiveness, accuracy and economy of borehole plugging

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