A similar simulation method and device for coal seam water injection sealing hole test
A similar simulation, coal seam water injection technology, applied in the direction of measuring devices, fuel oil testing, material inspection products, etc., can solve problems such as inability to seal accurately and correct, and achieve the effect of improving water injection efficiency and reducing work difficulty
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Embodiment 1
[0057] A similar simulation method for a coal seam water injection sealing hole test, comprising the following steps:
[0058] S1 Determining the experimental parameters: According to the force characteristics of water injection sealing holes, the force model of water injection sealing holes is established, and the simulated similarity ratio is obtained.
[0059]
[0060] Among them, P 0 , P are the similar model and the actual water injection pressure on site, unit MPa;
[0061] σ 0 , σ are similar model and field actual confining pressure stress, unit MPa;
[0062] D. 0 , D are the similar model and the actual drilling diameter on site, unit mm;
[0063] L 0 , L are the length of the similar model and the actual sealing hole on site, unit mm;
[0064] According to the thickness of the coal seam on site and the parameters affecting the similarity ratio, the experimental parameters and coal sample size specifications are determined. Among them, the parameters affectin...
Embodiment 2
[0116] see Figure 2 to Figure 7 , a similar simulation device for coal seam water injection sealing hole test, comprising a coal molding pressing device and a water injection system, the molding coal pressing device includes a mold box 11, a peripheral support box 3, a transfer beam 13 and embedded in a coal molding sample 1 The water injection pipe, the water injection pipe is used to form the water injection hole 10 of the briquette sample 1;
[0117] Both ends of the mold box 11 are provided with avoidance holes for water injection pipes, and the escape holes are waist-shaped holes; the top of the mold box 11 is open, and the transfer beam 13 is arranged at the opening of the mold box 11, and the mold box 11 communicates with the surrounding pressure through the transfer beam 13 The pressurizing device 2 is connected; the peripheral support box 3 has a cavity matching the circumference of the mold box 11, and the mold box 11 is located in the cavity of the peripheral suppo...
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