Coal-rock sample real triaxial vertical dynamic-static loading tester

Abstract

The invention relates to a coal-rock sample real triaxial vertical dynamic-static loading tester, which is applicable to reappeared impact mineral pressure, rock explosion and other coal-rock power disasters during a underground mine mining process. The testing system is composed of a triaxial loading system, a measurement control system, and a power loading system; X and Y axes are provided with double high-frequency response servo cylinders of four-pillar and two-pillar single piston cylinders, and installed on the same one horizontal platform driven by a lifting servo mechanism along the Z axis direction, wherein one direction of the Y axis is provided with an unloading cylinder to realize the rapid unloading of stress at one face; the Z axis is provided with a four-pillar hollow type dual-piston rod single servo cylinder, and configured with a resilience type displacement sensor, the measurement data feeds back to the lifting servo mechanism, and guarantees that the loading center of the horizontal X and U axes is always intersected at one point and the center point is unchanged. The high-speed servo cylinder is installed on the Z axis for providing the power source. The tester can simulate the real triaxial vertical dynamic-static loading state of the coal-rock sample, the Z-axis impact power loading state, the Y-axis fixing rate or rapid stress unloading state.

Description

technical field [0001] The patent of the invention relates to a real three-axis vertical dynamic and static loading test machine for coal and rock samples, which is mainly used for the research on the mechanism of mine impact dynamic disasters and the simulation and reproduction in the laboratory. Background technique [0002] With the continuous mining of coal resources, the mining depth continues to increase. Ensuring the safe mining of mines at high depths is a necessary condition for the safe supply of energy in our country and the stable development of the social economy. However, when entering deep mining, the law of mine pressure is obviously different from that of shallow mines. Among them, coal-rock dynamic disasters represented by rock bursts have brought new challenges to mine safety. Under the condition of deep mining, the frequency and intensity of rock burst are much higher than those in shallow mining, and the casualties and economic losses caused by it also p...

AI Technical Summary

Problems solved by technology

However, no matter what kind of equipment, it can only complete the static load and dynamic load tests. In fact, the load that drives the coal rock mass to generate rock burst is a combination of dynamic and static loads.

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