Gas extraction drilling orifice device and operating method thereof

Abstract

The invention provides a coal mine underground gas extraction drilling orifice device which comprises an orifice pipe (1), an outburst prevention pipe (4), a four-way joint (5), a sealing assembly (6), an orifice sealing pipe (7), a rubber tube (9) and a gas-water separator (10), wherein the outburst prevention pipe (4), the four-way joint (5) and the orifice sealing pipe (7) are sequentially connected by flanges and are fixed and sealed on the drilling wall together with the orifice pipe (1); the gas-water separator (10) is connected with the lower end port of the four-way joint (5) by the rubber tube (9). The sealing assembly (6) is arranged in the orifice sealing pipe (7), reliable sealing between a drill rod (8) and the orifice sealing pipe (7) can be realized so as to effectively shunt gas, backwater and return slag in a hole into designated pipelines or regions and prevent the gas in the hole from flowing to the construction site of a roadway to cause a gas overrunning accident.

Description

technical field [0001] The invention relates to the field of mining equipment, in particular to a gas drainage drilling hole opening device and an operating method thereof. Background technique [0002] During the construction of underground gas drainage drilling in coal mines, one of the common factors that cause the gas concentration in the drilling site to exceed the standard is the gas released in the drilling. There are many branch holes, the concentration of gas released from the boreholes is high, and accidents in some boreholes are frequent, and coal and gas outburst accidents often occur. These all seriously threaten the life safety of underground workers in coal mines and affect the safety and production efficiency of coal mines. Therefore, it is necessary to design a gas drainage drilling orifice device according to the characteristics of gas drainage drilling to solve the problems of coal and gas outburst, gas exceeding the limit and gas collection in the process...

AI Technical Summary

Problems solved by technology

[0002] During the construction of underground gas drainage drilling in coal mines, one of the common factors that cause the gas concentration in the drilling site to exceed the standard is the gas released in the drilling. There are many branch holes, and the gas concentration released by drilling is high. In addition, accidents in some drilling holes are frequent, and coal and gas outburst accidents often occur. These all seriously threaten the life safety of underground workers in coal mines and affect the safety and production efficiency of coal mines.

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