Dynamic Excavation and Unloading System and Experimental Method for Deep Roadway
An excavation unloading and dynamic technology, which is applied in the direction of instruments, measuring devices, scientific instruments, etc., can solve the unloading rate limitation quasi-static category, the inconsistency of unloading rate of ground stress, and the difficulty of realizing the simulation research of ground stress unloading effect and other problems, to achieve the effect of convenient experiment copying, stable loading and simple structure
Active Publication Date: 2019-08-30
ANHUI UNIV OF SCI & TECH
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[0004] At present, there are mainly two types of methods widely used in excavation and unloading experiments: one is to use compression devices (RMT and MTS) to carry out loading and unloading experiments on specimens, and these devices have a common problem that the unloading rate is limited to the quasi- The static category is obviously inconsistent with the ground stress unloading rate induced by the actual roadway blasting excavation; the other type is to use the deep roadway surrounding rock rupture mechanism and support technology simulation test system to conduct blasting excavation experiments on the model. The shock wave is coupled with the ground stress unloading wave, so it is difficult to realize the simulation study only on the ground stress unloading effect
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[0052] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the scope of the present invention.
[0053] The preferred specific implementation of the deep roadway dynamic excavation unloading effect experimental system of the present invention is as follows figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, including frame 1, test bench 39 and servo control box 52, frame 1 is provided with impact loading system, and described impact loading system includes loading device, expansion device, force transmission device, unloading device and speed measuring device. device, the expansion device is arranged ...
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The invention discloses a deep roadway dynamic excavation unloading effect experiment system and experiment method, and belongs to the technical field of experiment test. The experiment system comprises: a dynamic impact unloading system for applying axial dynamic tension to a part to be pre-buried through a loading device, an amplified loading system and a force transmission system; a deep ground stress loading system for applying load to a model through a loading platform and a loading control system; and an observation system for detecting the excavation speed of the pre-buried part and the excavation unloading effect through a speed detecting device and a stress and strain test system. The deep roadway dynamic excavation unloading effect experiment system is used to realize single-pass dynamic excavation unloading test, circulating dynamic excavation unloading test and combined test of a model. The deep roadway dynamic excavation unloading effect experiment system has the advantages of simple structure, stable loading, ingenious design, good test accuracy and low cost, is suitable for carrying out excavation unloading effect test on pre-buried parts made of various materials and having various shapes, and is especially suitable for carrying out dynamic excavation unloading effect test on a concrete material model.
Description
technical field [0001] The invention belongs to the technical field of dynamic excavation and unloading effect testing of deep underground rock mass, and in particular relates to a system, principle and experimental method for simulating dynamic excavation and unloading of deep roadways. Background technique [0002] With the rapid development of transportation infrastructure and the development of underground resources, underground roadways, as a main form of underground structure, have been widely used in the fields of hydropower, transportation, resources, and energy. Underground engineering is faced with the problem of high ground stress dynamic excavation and unloading. [0003] As we all know, drilling and blasting excavation will lead to the dynamic unloading of the initial in-situ stress of the deep rock mass, and the generated unloading stress wave strongly disturbs and retains the stress field of the surrounding rock mass, making the cracks closed under the origina...
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IPC IPC(8): G01N3/08G01N3/303
Inventor 董春亮卢小雨赵光明左超
Owner ANHUI UNIV OF SCI & TECH