Testing device and testing method for rock cracked through coupling of dynamic static load and water pressure

Abstract

The invention discloses a testing device and a testing method for rock cracked through coupling of dynamic static load and water pressure. The testing device comprises a Hopkinson pressure rod device and a manual pressure pump. The Hopkinson pressure rod device comprises a high-pressure air tank, a punch, an incident rod, a data collecting processing system, an extension rod and an axial static pressure loading device. A testing piece and a water pressure loading pressure head are arranged between the incident rod and the extension rod, and the manual pressure pump with a pressure meter is connected with the water pressure loading pressure head through a sleeve. The method includes that first, axial static pressure is exerted on the testing piece through the axial static pressure loading device, then water pressure is exerted on the testing piece and adjusted to a preset value through the manual pressure pump with the pressure meter, the high-pressure air tank drives the punch to impact the incident rod, and finally collected data is processed. The testing device and the testing method achieve testing of dynamic mechanics characteristics of the rock in a laboratory under the condition of the coupling of water pressure seepage and dynamic and static stress and can better simulate deep excavation conditions.

Description

technical field [0001] The invention relates to a rock mechanics test device and a test method, in particular to a test device and a test method for cracking rocks coupled with dynamic and static loads and hydraulic pressure. Background technique [0002] In recent years, as human activities continue to go deep underground, the study of rock mechanics in deep mining has become important. The rock mechanics test that simulates the complex environment of deep rock is an important way to grasp the failure strength and deformation and failure laws of deep rock mass. Existing rock mechanics tests for simulating the complex environment of deep rocks are mainly carried out on rock mechanics test devices represented by static mechanical testing machines, and the mechanical properties of rocks under the coupling conditions of seepage and static pressure are obtained. In the process of deep mining, the rock is affected by the "three high factors" (high ground stress, high ground temp...

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Problems solved by technology

In the process of deep mining, the rock is affected by the "three high factors" (high ground stress, high ground temperature and high permeability), while considering the influence of water pressure seepage, it should also consider the impact of high ground stress and engineering disturbances such as blasting excavation on the rock. The influence of mechanical properties, the existing test methods and devices only realize the measurement of static mechanical parameters of rock under the coupling conditions of hydraulic seepage and static pressure, while ignoring the dynamic load, which cannot simulate the deep mining conditions well

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