Rock burst gas-containing coal breaking simulation experiment system and coal breaking experimental method

Abstract

The invention discloses a rock burst gas-containing coal breaking simulation experiment system. The rock burst gas-containing coal breaking simulation experiment system comprises an electromagnetic pressure boosting mechanism, a hydraulic pump station, an axial pressure device and a coal sample storage device; the hydraulic pump station provides hydraulic oil for generating a confining pressure tothe coal sample storage device; the hydraulic pump station provides the hydraulic oil for generating axial pressure to the axial pressure device; the hydraulic pump station provides the hydraulic oilfor pressurization to the electromagnetic pressure boosting mechanism; the electromagnetic pressure boosting mechanism provides the hydraulic oil for simulating the rock burst to the axial pressure device; and the axial pressure device provides impact force of the rock burst to the coal sample storage device. The invention also discloses a corresponding coal breaking experimental method. The invention does not need to lift heavy objects, can release greater pressure and easily and precisely adjusts the impact force, and the speed of releasing the impact force is faster, so that the inventioncan perform the rock burst gas-containing coal breaking simulation experiment more closely with the actual situation; and it is convenient to adjust the confining pressure, axial pressure and impact force, therefore, the invention is suitable for rapidly performing simulation experiments repeatedly under different conditions.

Description

Technical field [0001] The invention relates to the technical field of experimental equipment for coal and rock engineering, in particular to a simulation experiment system for rockburst breaking gas-containing coal and a corresponding coal breaking experiment method. Background technique [0002] Rockburst is a phenomenon in which the elastic strain energy accumulated in coal and rock mass is released rapidly and violently under certain conditions, causing the coal and rock mass to fragment and project outward. [0003] When the rock burst occurs, it will cause the underground roadway to squeeze and shrink, or even block it, which seriously affects the safety production of the coal mine. The occurrence of rock bursts is instantaneous, and the focus of its treatment is disaster prediction. Research on the trigger mechanism of rock bursts and the mechanism of impact damage to coal when rock bursts occur has important theoretical value and engineering guidance significance. [0004] T...

AI Technical Summary

Problems solved by technology

[0005] 1. Only by lifting the heavy object to a sufficient height can it have sufficient impact force, so the existing simulation system has a large volume and a high height

[0006] 2. When carrying out simulation experiments, heavy objects need to be lifted. Human lifting is labor-intensive, and mechanical lifting needs to be equipped with lifting equipment, which is costly; the lifted heavy objects need to be accurately aligned with the predetermined drop point below.

[0007] 3. It takes a process for the heavy object to fall, and the impact speed is slow

When the heavy object falls, it will be dangerous if people or appliances pass under the heavy object

[0008] 4. It is not easy to adjust the size of the impact force; when the size of the impact force is adjusted, the volume of the heavy object will change, and the adaptability of the heavy object to the force-bearing device below will change, resulting in an error in the actual impact pressure

When the heavy object is not suitable for the force-bearing device below, the heavy object or force-bearing device will bounce in an unpredictable direction, causing danger

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