Three-dimensional physical simulation experiment method of small-sized self-weight frame-type loading

Abstract

The invention discloses a three-dimensional physical simulation experiment method of small-sized self-weight frame-type loading. The method includes the following steps that firstly, front and rear side chair rails are installed on the front side and the rear side of a main frame device to form a similar material filling space according to a geological object to be simulated; secondly, a geometric analogue is filled into the similar material filling space with the height after the front and rear side chair rails are installed as the filling height for the first time, geometric analogue filling is carried out for the second time, the third time and the like according to the mode, a model is subject to air drying, and the front and rear side chair rails are disassembled; thirdly, a self-weight frame-type loading region is adjusted, so that a loading cross beam, a friction rubber plate and the geometric analogues make contact with one another well, a self-weight frame-type loading device freely slides up and down, and the loading height is equal to or smaller than the height of the front and rear side chair rails; fourthly, the model is subject to construction and excavation, and data collecting and recording are carried out through a computer system to complete an experiment. The method has the advantages that steps are reasonable and easy to execute. Due to the adoption of the method, underground engineering environments are made to precisely reappear, and data loading accuracy and experiment safety are improved.

Description

technical field [0001] The invention relates to a physical simulation experiment method of mine mining, which is a self-designed small-scale self-weight frame-type stowage three-dimensional physical simulation experiment device, and carries out the loading and self-weight of geological similar bodies in the model loading area and the self-weight frame-type stowage area respectively. Three-dimensional physical simulation experiment method of small self-weight frame-type loading under stress loading. Background technique [0002] Due to the complexity of the underground engineering environment and the constraints of high cost of field tests, similar simulation experiments have become an important scientific research method to realize the reproduction of such underground engineering environments such as rock and soil, geology and mines. [0003] Most of the existing laboratory physical simulation experimental devices are large-scale two-dimensional physical simulation experimen...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing laboratory physical simulation experimental devices are large-scale two-dimensional physical simulation experimental devices, which are filled with similar materials, cost a lot, and have a long cycle, and cannot realize three-dimensional experimental simulation. It is difficult to simulate the

At present, there are mainly two methods for realizing the upper load of the large-scale plane physical simulation experimental device. The first is the hydraulic loading experimental system. Since the load servo control cannot be realized, when the model has construction (mine roadway, chamber and working face, etc.) When the change is affected by the excavation disturbance process), there will be a reduction and drift of the loaded data, and it is difficult to ensure the accurate reproduction of the overlying strata stress in the physical simulation process

The other is the traditional iron brick loading (traditional self-weight loading) method. Since the model is a large-scale two-dimensional plane experimental device, more iron bricks need to be placed on the upper part of the model, and there are no load-transmitting beams and sliding side guards between the iron bricks and the filling model. Baffle protection, easy to cause the model to fall and hurt people, low safety factor

[0004] Based on reducing the loading cost, improving the accuracy of the stress environment and the safety of the experimental process, the small self-weight frame-type stowage three-dimensional physical simulation experimental device can effectively overcome the shortcomings of the above-mentioned experimental devices, but the experimental process is relatively complicated. Here, the self-designed experiment Based on the device, a small self-weight frame-type loading three-dimensional physical simulation experiment method is proposed, which is used to accurately restore and reproduce the underground engineering environment, improve the accuracy of loading data and the safety of the experimental process, and provide guidance for the feasibility of engineering practice

Images