Intelligent drainage slag system for coal mine gas extraction downhole drilling and application thereof

Abstract

The invention relates to an intelligent drainage slag system for coal mine gas extraction and downhole drilling and an application thereof, and belongs to the technical field of coal mine underground gas extraction. The system includes a mine PLC, a mine pneumatic drainage pump, a mine electric valve, a control pump electric valve, a flow sensor, a water level sensor and an operation monitoring system; the flow sensor is arranged in an outlet of the drainage pump, the water level sensor is arranged in a drill hole, an air inlet end of the mine pneumatic drainage pump is connected with the underground pressure air pipe through controlling the control pump electric valve, the inlet of the mine pneumatic drainage pump is connected with a collecting drainage pipe line, the mine electric valve is arranged on a downhole drilling drainage pipe line, and the downhole drilling drainage pipe line is connected to the collecting drainage pipe line; an operation monitoring system is arranged on the mine PLC and a ground computer end. According to the intelligent drainage slag system for coal mine gas extraction and downhole drilling, the repetition, high efficiency and automation of the drainage slag process are achieved, and the problem of low pumping concentration caused by the problem of water cinder in the downhole drilling is fundamentally solved.

Description

technical field [0001] The invention belongs to the technical field of underground gas drainage in coal mines, and relates to an intelligent drainage and slag discharge system for downward drilling of coal mine gas drainage and its application. Background technique [0002] Borehole gas drainage is currently the main method of underground gas drainage in coal mines, and it is the fundamental measure to control coal and gas outburst, which can effectively reduce mine gas gushing. Coal mines generally use hydraulic slag discharge drilling construction technology, and due to factors such as hydrogeological conditions in the stratum, a large amount of water and coal slag will generally accumulate in the downhole, and it is difficult to remove the accumulated water in the hole during the gas drainage process. Slag is effectively discharged. [0003] The water slag accumulated in the downhole reduces the effective air flow section of gas drainage, increases the negative pressure ...

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Problems solved by technology

[0005] In view of this, the purpose of the present invention is to provide an intelligent drainage and slag discharge system for downward drilling of coal mine gas drainage and its application. By sensing the water level change in the borehole, it can intelligently control multiple boreholes to complete the drainage and slagging operation, and realize the downhole drainage and slagging operation. Intelligent drilling, automatic drainage and slag removal work and intensive and efficient multi-hole parallel drilling management mode can improve the utilization rate of drilling holes and fundamentally solve the problem of low drainage concentration caused by water accumulation and cinders in downhole drilling question

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