Terrane stress simulation clamping device

Abstract

The invention discloses a strata stress simulation clamp, which is characterized in composed of a rectangle counteract frame which inner walls of two transverse edges are both fixed with at least one row of hydraulic cylinders, upper and lower press pieces respectively fixed on the push rods of the upper and lower hydraulic cylinders, and a pressure test box contacted between the upper and lower press pieces, wherein the upper end face of the pressure test box is open and tightly matched with a movable press plate, the upper press piece is contacted with the movable press plate, the front upright face of the pressure test box is sealed by an end cover while the right upright face is provided with a protruded port. The invention has the advantages that the invention can simulate integral strata stress, simulate local stress concentration of coal face caused by mining, and simulate the on-site horizontal inclinations of gas coal bed, particularly simulate the inclined coal bed with outburst in cutting through coal seam at the level crosscut of top and bottom plates.

Description

technical field [0001] The invention relates to a test device for simulating rock formation stress, in particular to a rock formation stress simulation clamping device for multi-angle simulation of rock formation stress in coal and gas outburst tests. Background technique [0002] In the study of the mechanism of coal and gas outburst, the hypothesis of comprehensive action is generally accepted by scholars. It believes that coal and gas outburst is the result of the combined action of stress, gas pressure and mechanical properties of coal. The mechanism of pressure and mechanical properties of coal in the outburst process has not yet been clarified. The former Soviet Union carried out a one-dimensional outburst simulation experiment in the 1950s, and the experiment showed that only under a large gas pressure gradient (a drop of several MPa per centimeter of gas pressure) is it possible for coal to be crushed and thrown out. In the early 1960s, Japanese scholar Hei Masuyuki...

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Problems solved by technology

[0005] 1. The models of the above experimental devices are all horizontal, but in reality, there are relatively few coal seams with a horizontal inclination in the underground, which cannot fully simulate the actual gas-containing coal seam on site, especially the coal outburst of the roof and floor stone gates. All coal seams are inclined, which cannot be simulated by existing devices;

[0006] 2. In addition, the stress applied by all the above experimental devices is also uniform, which can only simulate the rock face pressure as a whole, and cannot simulate the local stress concentration of the mining face caused by mining activities, and the stress concentration is often caused by Important factors that stand out

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