Nonuniform loading test device for simulating floor water inrush

Abstract

A nonuniform loading test device for simulating floor water inrush comprises a test bed system, a loading system and a test system, wherein the test system comprises a pressure cell and a displacement meter; the test bed system comprises a test bed base, a test bed main body and two hydraulic loading system frames; the test bed main body is in an enclosed frame structure comprising a bottom beam, a top beam, two side beams, a front panel and a rear panel; the loading system comprises a bottom pressurizing system, a top pressurizing system and a hydraulic loading system; the hydraulic loading system comprises two groups of water bags; each group of water bags comprises a plurality of water bags; each water bag is filled with water of a certain volume; an inner cavity space of the test bed main body between the two groups of water bags is filled with a similar material test model. The device has the advantages that an active hydraulic environment can be provided to a floor; uniform hydraulic distribution and nonuniform loading are achieved; an enough amount of deformation of the similar material test model is provided; a deformation and damage rule of the floor in the different hydraulic environments can be researched; the test reliability and practicability are improved.

Description

technical field [0001] The invention relates to a non-uniform loading test device for simulating water inrush from the bottom plate, which is applied to the water inrush test on the bottom plate of the coal seam during mining under pressure. Background technique [0002] Water inrush from the coal seam floor is an important cause of mine water hazards, and it is also an urgent problem to be solved to ensure the safety of coal mine production. Especially in North China, with the increase of mining depth, the threat of high confined water to coal mines becomes more and more obvious. During the mining process, the pressure of the confined water on the bottom plate causes the bottom plate to be damaged, and then causes the confined water to enter the working face along with the formed water guide channel, causing great harm to the coal mine production. To solve the water inrush problem of the coal seam floor, it is necessary to consider the original rock stress, geological stru...

AI Technical Summary

Problems solved by technology

These loading methods have the following major disadvantages: first, they cannot provide an active water pressure environment for the bottom plate; There is not much progress in the comparative test of different water pressure environments on the same test bench

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