Automatic water and slag discharging device in downward-hole gas extraction at water-rich area
A gas drainage and automatic drainage technology, which is applied in the direction of gas discharge, drainage, safety devices, etc., can solve the problems of unsatisfactory concentration and flow rate of gas drainage, hinder desorption of coal seam gas, and affect negative pressure drainage, etc., to achieve reduction Manual operation, easy promotion and application, and the effect of reducing labor costs
Inactive Publication Date: 2015-12-30
HENAN POLYTECHNIC UNIV
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Problems solved by technology
[0003] Due to the influence of many factors such as mining technology and underground terrain, different types of drilling such as upward holes, downward holes, and slotted holes must be drilled in the coal seam according to the needs. The water accumulated in the borehole will not only affect the negative pressure drainage and hinder the desorption of coal seam gas due to the pressure formed by the liquid column, but also cause serious water plugging, which will eventually lead to unsatisfactory concentration and flow rate of gas drainage.
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[0028] Such as figure 1 and Figure 5 As shown, the gas automatic drainage and slag discharge device for downhole drainage in the water-rich area of the present invention includes a power system, a drainage system, a drainage and separation system, and a control system.
[0029] The power system includes an air compressor 30, an air compressor pipeline 15, a vacuum pump 31, a negative pressure pipeline 14, and an air filling and deflation pipeline 2. A first electronic valve 9 is provided on it, and a vacuum pump 31 is connected to the outer port of the inflation and deflation pipeline 2 through a negative pressure pipeline 14 , and a second electronic valve 8 is provided on the negative pressure pipeline 14 .
[0030] A hole sealing device 33 is provided at the opening of the down hole 32 , and the inflation and deflation pipeline 2 passes through the hole sealing device 33 and extends into the down hole 32 .
[0031] The displacement system comprises the first displaceme...
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An automatic water and slag discharging device in downward-hole gas extraction at a water-rich area comprises a power system, a displacement system, an extraction separation system and a control system. The power system comprises a compression pump, a gas compressing pipeline, a vacuum pump, a negative-pressure pipeline and a gas charging and discharging pipeline. The displacement system comprises a first displacement gas bag, a plugging gas bag and a second displacement gas bag, wherein the first displacement gas bag, the plugging gas bag and the second displacement gas bag are made of nitrile rubber. The extraction separation system comprises a gas drainage pipe, a gas, water and powder pumping pipe, a gas-water separation box and a solid-liquid separation box. Water and coal powder in downward holes can be automatically discharged almost without influences on seal performance and extraction of the downward holes, and the automatic water and slag discharging device has a great promoting effect on improvement of extraction efficiency, coal mine safety and efficient production. Practicability is high, and application and popularization are easy.
Description
technical field [0001] The invention relates to the technical field of gas drainage in coal mines, in particular to an automatic drainage and slag discharge device for gas drainage through downhole holes in water-rich areas. Background technique [0002] At present, my country's coal production is developing in the direction of high efficiency, mechanization and intensification. However, gas disaster accidents such as coal and gas outburst have become an important factor restricting its rapid development and an enemy that endangers coal mine production. In order to effectively control gas and reduce gas disasters, many coal mines have arranged boreholes underground for underground gas drainage, and coal and gas outburst accidents have been effectively contained. [0003] Due to the influence of many factors such as mining technology and underground terrain, different types of drilling such as upward holes, downward holes, and slotted holes must be drilled in the coal seam a...
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IPC IPC(8): E21F7/00E21F16/00
CPCE21F7/00E21F16/00
Inventor 倪小明赵永超白万备孙小婷
Owner HENAN POLYTECHNIC UNIV