Gas-slag separation and recovering system for drilling construction

Abstract

The invention belongs to the field of safety of coal mine downhole gas extraction and drilling construction, and particularly relates to a gas-slag separation and recovering system for drilling construction, which comprises a drill and a water-spraying dust prevention system, wherein a drill stem kit of the drill is provided with a three-way hole packer; the three-way hole packer is connected with a connection pipe; the connection pipe is connected with a transmission pipeline through a three-way pipe; the connection pipe is provided with a throttling valve which is used for controlling the flow of drill cuttings to prevent the transmission pipeline from being blocked by the excessive drill cuttings; one end of the transmission pipeline is connected with a blower, and the other end of the transmission pipeline is connected with a closed space; the other end of the closed space is connected with a negative-pressure drainage pipe connected to a ground gas extraction system; and the closed space is provided with the water-spraying dust prevention system and a slag removal door which are used for separating the drill cuttings. The recovering system provided by the invention can safely and efficiently separate the drill cuttings and gas in the drilling process of the drill in coal mine downhole gas extraction and drilling construction.

Description

technical field [0001] The invention belongs to the safety field of drilling construction for underground gas drainage in coal mines, and in particular relates to a system for separating and recovering gas dregs in drilling construction. Background technique [0002] In the process of anti-outburst drilling in the construction floor of the outburst coal seam, a large amount of gas is often ejected from the drilling hole, and a large amount of coal cuttings are ejected at the same time, which causes the gas in the working space to rise, and the construction drilling is forced to Shutdown, intermittent operations, and blind construction where local gas exceeds the limit and has not been detected, resulting in gas accidents. Hole construction, but it cannot be solved when the drilling hole is serious. After a large amount of gas gushes out to the working space, it must be discharged to the negative pressure ventilation system of the mine through the local ventilator. The gas d...

AI Technical Summary

Problems solved by technology

[0002] In the process of anti-outburst drilling in the construction floor of the outburst coal seam, a large amount of gas is often ejected from the drilling hole, and a large amount of coal cuttings are ejected at the same time, which causes the gas in the working space to rise, and the construction drilling is forced to Shutdown, intermittent operations, and blind construction where local gas exceeds the limit and has not been detected, resulting in gas accidents. hole construction, but it cannot be solved when the drilling hole is serious

After a large amount of gas gushes out to the working space, it must be discharged to the negative pressure ventilation system of the mine through the local ventilator. The gas discharged from the ventilation system cannot be recycled and directly discharged into the atmosphere space. 1m 3 Gas emptying is equivalent to 21m 3 The harm of carbon dioxide to the ozone layer of the atmosphere has caused environmental pollution and waste of resources

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