TBM hob and high-pressure water jet coupling rock breaking simulation test system and method

Abstract

The invention discloses a TBM hob and high-pressure water jet coupling rock breaking simulation test system and method. Installation of multiple disc type hobs can be achieved, the positions of the hobs can be adjusted, the side face and rear side hydraulic oil cylinders pressurize a rock test piece in a three-way mode, and the three-way stress state of a tunnel face rock can be truly simulated. Horizontal design is adopted for the test device, the cutterhead can be used for horizontally breaking the rock, the angle of the hobs is adjustable, the cutterhead can be used for rotatably cutting the rock and vertically and linearly cutting the rock up and down, the rock breaking processes of different radiuses of the on-site TBM hobs can be simulated, the situation that the hob cuts and breaksthe rock under the real working condition can be better simulated, and the rock breaking effect can be better in cooperation with the high-pressure water jet coupling effect.

Description

technical field [0001] The disclosure belongs to the technical field of tunnel engineering in geotechnical and underground engineering, and in particular relates to a rock breaking simulation test system and method coupled with a TBM hob and a high-pressure water jet. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] At present, China's high-speed railway and urban subway are being built at a speed that shocks the world. The demand for tunnel and underground engineering construction is increasing, and the corresponding technical requirements are also getting higher and higher. In the construction of tunnels and underground engineering, compared with the traditional drilling and blasting method, the tunneling speed of the full-face rock boring machine (TBM) is about 4 to 10 times that of the conventional drilling and blasting method. It is f...

AI Technical Summary

Problems solved by technology

[0006] The Chinese invention patent with application number 200810143552.2 discloses "An Adjustable Multi-hob Cutting Rock Breaking Test Device" (Li Xibing, Zhao Fujun, Xia Yimin, Zhou Zilong, Tan Qing, Zhou Xiwen). The installation of the hob was designed to simulate the rock-breaking situation of the disc-shaped hob. However, the vertical cutting of the hob in the test device did not match the horizontal rock-breaking in the actual project. Moreover, the confining pressure effect of the rock was not considered, and the rock-breaking produced The rock slag cannot be transported out in time, which affects the continuous cutting

[0007] The Chinese invention patent with the application number 201110246883.0 discloses the "TBM rock-breaking test device" (Hong Kairong, Wang Haixia, Chang Jiadong, Zhao Haijun, Chen Fei, Li Fengyuan, Zhang Bing). The device adopts a horizontal design, which is closer to the real engineering However, it is still impossible to simulate the confining pressure effect of the original rock. Although there is a slag outlet, the slag discharge effect is not good during the rock breaking process, which affects the rock breaking effect and the observation of the experimental process.

[0008] The Chinese invention patent with the application number 201910130181.2 discloses the "Jet Assisted Hob Rock Breaking Device Mounted on TBM and Its Application" (Liu Zhengyu, Hu Mengmeng, Zhang Chao, Zhang Bo, Liu Bin, Cao Wenzheng, Li Biao). There is a jet nozzle next to the hob, which can spray high-pressure water jets and couple with the hob to break rocks. However, the positions of the hob and the water jet nozzle are fixed, and the positions of the hob and nozzle cannot be changed to achieve different conditions.

[0009] Yang Fan's master's thesis of Tianjin University "Development of TBM disc-shaped hob rock-breaking test device" provides a TBM disc-shaped hob rock-breaking test device. The device adopts a horizontal structure and uses the same hob and knife as the real TBM The box and installation form are relatively close to the real rock-breaking situation of the hob, but the number and position of the hob cannot be changed by the cutter head, and the three-dimensional stress state of the rock on the face of the tunnel cannot be simulated.

In addition, the experimental device for rotary cutting of shield cutters developed by the State Key Laboratory of High-performance and Complex Manufacturing of Central South University can simulate the rotary cutting of rock mass by multiple hobs. The large-scale mechanical rock-breaking test platform developed by Beijing University of Technology adopts vertical By adjusting the upper and lower height of the cutter, the left and right positions of the sample box and the size of the confining pressure, it can simulate different penetrations, cutter spacing and ground stress and other working conditions. Vertical structure, designed hob installation structure with adjustable hob spacing, the rock-breaking device of the above-mentioned hob generally cannot truly simulate the actual engineering rock-breaking situation, does not have vertical straight line cutting, and the device function is not perfect enough to meet more experiments Defects required

Images