Punching device and method based on cooperation of nanofluid electro-hydraulic breakdown and infrared thermal radiation
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A technology of nanofluid and punching device, which is applied in the direction of mining fluid, safety device, earthwork drilling and mining, etc. It can solve the problems of enhanced permeation of punching liquid, easy blockage, poor punching effect, etc., and achieve the effect of enhanced punching effect , Fast heating speed and easy operation
Active Publication Date: 2021-03-09
CHINA UNIV OF MINING & TECH
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[0002] Coal will continue to be the main energy source in my country in the next few decades, and as the depth and intensity of mine mining continue to increase, the threat of gas to safe production will become more and more serious. Gas drainage is the fundamental measure for gas disaster control. To improve the efficiency of gas control, the domestic industry has adopted a series of pressure relief and anti-reflection measures, among which the widely used and more applicable one is the hydraulic punching technology; however, in the actual application of this technology, most of them use pure Water or abrasive fluid is used as the punching liquid, which has problems such as poor punching effect or easy clogging, and the punching liquid cannot be further used to enhance permeability after injection
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[0042] Next, the present application also provides an implementation method of the above-mentioned punching device based on nanofluid-based liquid-electric breakdown and infrared heat radiation, which specifically includes the following steps:
[0043] The first step is to install the combined drill pipe 17, connect various pipelines, and push the drill pipe 17 into the borehole 24 until the bottom of the borehole 24 after the punching device is installed;
[0044] In the second step, a movable hole sealer 15 is installed at the position of the drill pipe 17 and the hole 24, and the hole 24 is sealed, and the liquid injection pump station 19 is started. Pipe 7 injects AZO nanofluid into injection chamber 8;
[0045] The third step is to start the high-voltage electric pulse generator 20 to charge the positive electrode plate group and the negative electrode plate group (here, the preset charging value is 250V), after the positive electrode plate group and the negative electrod...
Embodiment 2
[0050] The present application also provides a second implementation mode, which specifically includes the following steps:
[0051] The first step is to install the combined drill pipe 17, connect various pipelines, and push the drill pipe 17 into the borehole 24 until the bottom of the borehole 24 after the punching device is installed;
[0052] In the second step, a movable hole sealer 15 is installed at the position of the drill pipe 17 and the hole 24, and the hole 24 is sealed, and the liquid injection pump station 19 is started. The tube 7 injects ZnO nanofluid into the liquid injection chamber 8;
[0053] The third step is to start the high-voltage electric pulse generator 20 to charge the positive electrode plate group and the negative electrode plate group (here the preset charging value is 500KV), after the positive electrode plate group and the negative electrode plate group are charged to the preset voltage of 500KV Turn off the high-voltage power switch 21, the ...
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Abstract
The invention relates to a nanofluid-based electro-hydraulic breakdown and infrared thermal radiation coordinated punching device and method, the device comprises a drill rod, a movable hole packer, an electro-hydraulic breakdown assembly and an infrared radiation heating assembly, the punching device is installed at a planned punching position, the hole packer is used for sealing a hole, and theelectro-hydraulic breakdown assembly and the infrared radiation heating assembly are installed at the same time. Then a liquid injection pump station is used for injecting nanofluid into the liquid injection cavity, then a high-voltage electric pulse generator supplies power to the positive and negative electrode plates to trigger the electro-hydraulic effect to conduct punching, and finally an infrared heater is started to crack the coal body through thermal stress. The high-pressure electro-hydraulic punching technology and the infrared thermal radiation heating technology are combined by adopting the nanofluid which is an energy transport working medium with high heat transfer performance, the advantages that electro-hydraulic breakdown is convenient and easy to precisely control can beexerted, the coal body can be rapidly heated and cracked by utilizing infrared radiation heating, and the purposes of coal seam permeability improvement and crack development are efficiently achieved. The method is simple, reliable in performance and convenient to maintain, and has a wide engineering application prospect.
Description
technical field [0001] The invention relates to a punching device and method based on nanofluid-based electrohydraulic breakdown and infrared heat radiation, and belongs to the technical field of mine hydraulic punching. Background technique [0002] Coal will continue to be the main energy source in my country in the next few decades, and as the depth and intensity of mine mining continue to increase, the threat of gas to safe production will become more and more serious. Gas drainage is the fundamental measure for gas disaster control. To improve the efficiency of gas control, the domestic industry has adopted a series of pressure relief and anti-reflection measures, among which the widely used and more applicable one is the hydraulic punching technology; however, in the actual application of this technology, most of them use pure When water or abrasive fluid is used as the punching liquid, there are problems such as poor punching effect or easy clogging, and the punching li...
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Application Information
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