Mechanical testing device for breaking rock by coupling dynamic and static loads with fissure pressure and method thereof

Abstract

The invention relates to a mechanical testing device for breaking a rock by coupling dynamic and static loads with fissure pressure and a method thereof. The device comprises a dynamic load loading device, a static load loading device, a test specimen, an incident rod, a transmission rod, a data acquisition device, a data processing device, a connecting frame, a hydraulic pump, a limiting plate, ahigh-speed microscopic camera, a crack pressure loading head, a steel wire and a pressurization gas bag, wherein the test specimen is provided with a prefabricated fissure; an open end of the prefabricated fissure is provided with the limiting plate; the steel wire passes through two ends of the limiting plate; two ends of the steel wire are provided with steel wire pre-tightening clamps; the pressurization gas bag is mounted in the prefabricated fissure defined by the steel wire and the limiting plate; the pressurization gas bag is provided with the crack pressure loading head; the crack pressure loading head passes through the limiting plate and is connected with the hydraulic pump through a hydraulic pipeline; the high-speed microscopic camera is mounted above the prefabricated fissureof the test specimen; and the high-speed microscopic camera is connected with the data processing device. The device is used for realizing measuring the dynamic mechanical property of a fissure pressure-containing rock mass in a laboratory condition.

Description

technical field [0001] The invention relates to fractured rock mechanics, belongs to the field of mine rock mechanics, and in particular relates to a dynamic and static load and fracture pressure coupling fractured rock mechanics test device and method thereof. Background technique [0002] The law of failure and crack propagation of brittle rock has always been an important research direction of rock fracture mechanics and mine rock mass mechanics. The fracture of rock is not only related to the static load and impact load of the rock, but also closely related to the pore size, pore fluid and its pressure inside the rock. Yue Zhongqi and others have studied the fluid in the pores, and concluded that many geological phenomena are related to the gas inclusions in the pores, but these studies are mostly theoretical deduction, and there is no introduction of related equipment and experimental research. Most of the crack research methods are to carry out various loadings on the...

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Problems solved by technology

However, this method adopts the buried method for internal pressure injection, which cannot realize the observation of prefabricated fractures, and the observation method is single, so it is impossible to monitor and study the development process of fractures containing fracture pressure. In addition, this method is only internal water injection under static load Pressure coupling, unable to observe rock failure behavior under dynamic load

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