An underground coal mine dredging borehole water and gas blowout prevention device and its installation method

Abstract

The invention discloses an underground coal mine dredging borehole water and gas blowout prevention device and an installation method thereof, which is dedicated to solving the problem of water and gas blowout holes in the coal mine underground dredging borehole water detection and pressure relief process. It mainly includes the orifice support sealing structure and the first separation assembly and the second separation assembly whose working sequence is parallel; the orifice support sealing structure includes the orifice protection tube, the sealing sleeve, the hemispherical gas collection hood, and the air duct . The first separation assembly includes a water release device, the fluid inlet of the water release device is connected with the cylinder body of the air cylinder exposed to the hemispherical air collecting hood; the water release device is communicated with the drain pipe and the exhaust pipe; the second separation The assembly includes a separation box, the upper mouth of the blower is connected to the fluid inlet of the separation box, and the separation box is communicated with an exhaust pipe and a drain pipe. The blowout prevention device of the present invention has the advantages of simple overall structure, good blowout prevention effect, convenient installation and disassembly, low cost and wide practicability.

Description

technical field [0001] The invention relates to an underground coal mine dredging borehole water and gas blowout prevention device and an installation method thereof, especially suitable for water and gas blowout prevention and drainage during coal mine underground dredging borehole water exploration and pressure relief. Background technique [0002] Coal is the main energy source in our country, and the development and utilization of coal plays an important role in the development of the national economy. Safe mining is the primary issue of coal mining and utilization. According to records, 60% of coal mines in my country are affected by floor pressure water damage to varying degrees. Therefore, floor water damage is an important risk factor for coal mining safety in my country. During the process of water exploration and pressure relief in coal mine underground dredging drilling, the stress of the orifice changes under the dynamic disturbance of the drill pipe and the comp...

AI Technical Summary

Problems solved by technology

Ordinary blowout prevention devices are simple in structure and function. At present, there are many types of devices for small, single water or gas spraying, but it is not common to prevent water and gas spraying at the same time. The blowout prevention device when the gas is ejected at the same time is of great significance to ensure the safe production of mines

Solve the problems that once a large amount of water and gas are sprayed from the hole at the same time, the ordinary blowout preventer will have insufficient buffer space and cannot realize the separation and drainage of water and gas.

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