Coal bed mining floor grouting infiltration-reducing simulation testing system

Abstract

The invention discloses a coal bed mining floor grouting infiltration-reducing simulation testing system, belonging to the field of the deep rock mass engineering technology. The coal bed mining floor grouting infiltration-reducing simulation testing system comprises a testing machine, a grouting system and a water pressurizing system, wherein the testing machine comprises loading mechanisms arranged in X, Y and Z directions of the testing machine, the telescopic shaft of the loading mechanism penetrates through the outer wall of the testing machine, the inner end of the telescopic shaft is fixedly connected with a pressurizing plate, the edge periphery of the pressurizing plate is wrapped by a rubber binding band, the grouting system is connected with the testing machine by a connecting plate, and the water pressurizing system is connected with the testing machine by a pressurized water feeding device of a hydraulic system. The coal bed mining floor grouting infiltration-reducing simulation testing system has reasonable design, can vividly simulate the coal bed mining grouting phenomenon in high-pressure underwater under a condition of three-dimensional stress loading, and can achieve the good effect.

Description

technical field [0001] The invention belongs to the technical field of deep rock mass engineering, and in particular relates to a simulation test system for reducing seepage through grouting of a coal seam mining floor. Background technique [0002] With the exhaustion of shallow coal seam resources, my country's coal mines have now entered the era of deep mining. Deep mining is faced with a complex environment of "three highs and one disturbance", among which the floor water inrush disaster caused by high ground stress and high confined water is one of the main disasters in deep mining. The reason for the formation of floor water inrush disasters is that high ground stress and high confined water act on the floor rock formation, resulting in the conduction between the floor fissure zone and the confined water, and the water seepage to the working face, forming a water inrush channel. Grouting the coal seam floor is an effective means to prevent and control water inrush dis...

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