Two-dimensional dynamic and static combined loading similar simulation test method
A technology of dynamic and static combined loading and similar simulation, which is applied in the direction of testing material strength by applying repetitive force/pulsation force and testing material strength by applying stable tension/pressure, can solve the problem that it is difficult to meet various dynamic load conditions and cannot achieve coal Rock mass stress wave loading and other problems, to achieve the effect of convenient installation, various stress conditions and flexible test methods
Active Publication Date: 2019-06-21
CHONGQING UNIV
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[0004] The existing coal and gas outburst simulation test method and its supporting devices have two types of dynamic load application methods: drop hammer and Hopkinson bar, which have a good simulation
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The invention discloses a two-dimensional dynamic and static combined loading similar simulation test method. Coal powder is selected as a test material, or similar materials are selected as test materials, or coal powder and similar materials are selected as test materials; and a two-dimensional combined stress-induced outburst simulation test device is used, static load loading is performed at first, and then dynamic load loading and data acquisition are performed. With the method adopted, the loading of various stress waves of coal rock mass can be realized. Compared with a traditional drophammer dynamic load application method and a Hopkinson bar dynamic load application method, the impact load application test method of the invention is more flexible, enables more diverse stress conditions and can simulate a two-dimensional dynamic and static combined loading induced coal and gas outburst test.
Description
Technical field [0001] The invention relates to a similar simulation test method for studying the stress distribution of coal and rock mass under combined dynamic and static loading conditions. Background technique [0002] Similar model test refers to the physical test, through the corresponding test on the scaled down or proportional model, to obtain relevant data and check design defects. Proportional loads are applied to a test structure (or component) similar to the prototype made of appropriate proportions and similar materials, and the model is subjected to a force to perform the actual structural test of the prototype structure. The test object is a test representative that imitates the prototype (the actual structure) and is copied according to a certain scale, which has all or part of the characteristics of the actual structure. An important experimental research method that uses a model similar to the prototype to conduct experimental research and applies the research...
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Inventor 张东明叶辰尹光志许江李树建肖伟晶叶茂林楚亚培李小明杨邦友金磊
Owner CHONGQING UNIV