Experiment platform and experiment method for researching fragile material plasma blasting fracture process

Abstract

The invention relates to the field of rock mechanics and mining engineering and in particular to an experiment platform and an experiment method for researching a fragile material plasma blasting fracture process. The experiment platform comprises a shock resistance tester, a plasma blasting system, and a non-contact high-speed photography full-field strain analyzing system. The experiment methodis applied for the experiment platform. Through the experiment platform and the method, a blasting fracture process experiment can be safely and accurately performed on different sizes of fragile material test pieces. The experiment platform and the experiment method do not need an explosive, can be suitable for the large size of the test piece, and are capable of simulating a high static stress environment, and researching the fragile material plasma blasting fracture process without regional limitation.

Description

technical field [0001] The invention belongs to the field of rock mechanics and mining engineering, and in particular relates to an experimental platform and an experimental method for studying the plasma blasting fracture process of brittle materials. Background technique [0002] As shallow mineral resources are decreasing day by day, a large number of mines at home and abroad have entered into deep mining one after another. The ore-rock mass that occurs in the deep is in a complex state of high geostress. When drilling and blasting is used for deep mining, the ore-rock mass will be destroyed under the joint action of high geostress and blasting impact load. The existence of deep high ground stress has greatly changed the law of blasting failure of ore rock mass. Therefore, the influence of deep high stress field on the blasting failure law of ore and rock mass has become a hot research topic. At present, for geotechnical engineering, the definition of high stress is bas...

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Problems solved by technology

Compared with the above-mentioned large-scale specimens, the initial stress field is small, which cannot effectively simulate the deep high static stress environment. This method also has a single test method, and the material of the specimen is quite different from the mechanical properties of the ore and rock mass. Problem: some use industrial explosives to carry out experiments in deep mine sites. The experimental conditions are very similar to the actual engineering and have advantages that other experiments do not have. Complex and changeable, the stress state in the rock mass cannot be accurately measured, resulting in poor repeatability of on-site experiments. The on-site experiment sites are usually in poor conditions and the environment is harsh. Many sophisticated testing equipment used to observe the blasting process cannot work effectively, which greatly restricts The research content that can be carried out in the field experiment is limited, which makes the experiment have great limitations and cannot be popularized and applied.

[0004] In addition, due to the flammable, explosive and other high-risk properties of explosives and their easy mobility, the country has strictly managed and controlled the use of civil explosive materials, and units without relevant qualifications cannot obtain and use explosives and other related civil explosive materials. , most universities and scientific research units do not have the relevant qualifications, and cannot use explosives to carry out blasting experimental research, which limits the development of ore rock blasting experimental research to a large extent

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