Fractured coal body grouting reinforcement experiment method and grouting reinforcement experiment mold

Abstract

The invention discloses a fractured coal body grouting reinforcement experiment method and a grouting reinforcement experiment mold. The experiment method comprises the following steps that S1, a cylindrical coal sample is drilled from coal briquettes obtained on site; s2, splitting along the bedding direction of the coal sample, so that the coal sample forms a crack along the bedding surface of the coal sample; s3, the coal sample is placed in the grouting reinforcement experiment mold; s4, the grouting reinforcement experiment mold is fastened; s5, using an injector to inject the slurry into the crack through the injector; s6, slurry injection of the injector is stopped; s7, 24 hours after grouting is finished, the coal sample is taken out of the mold, and after maintenance, a uniaxial compression test, a tensile fracture test and a Brazilian splitting test are sequentially conducted; s8, summarizing a mechanism of reinforcing the fractured coal body by the slurry; according to the invention, a coal sample with obvious bedding is collected from a coal mine on site, so that the test accuracy is ensured; a grouting reinforcement experiment mold is used for restraining the coal sample so as to improve the reliability of the experiment; therefore, the coal sample after the slurry is fully filled, permeated and solidified can be conveniently experimented, and the experiment effect is improved.

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