Rock slag quartz content testing system and method for TBM

Abstract

The invention provides a rock slag quartz content testing system and method for a TBM. The rock slag quartz content testing system comprises a base and a control terminal which are arranged at the position close to a TBM conveyor belt, wherein the base is at least fixedly provided with a rock debris sample pickup mechanism and an X-ray fluorescence spectrum analysis mechanism which communicate with the control terminal; and the rock debris sample pickup mechanism is used for picking up a rock debris sample from the TBM conveyor belt and transmitting the rock debris sample to the X-ray fluorescence spectrum analysis mechanism, and the control terminal is used for determining the content of rock debris quartz according to the received fluorescence spectrum information. The content of quartz or other minerals in rock slag in TBM tunneling can be obtained in real time, so that the quality of rock mass before drilling is accurately evaluated, the quality grade of the rock mass before drilling can be forecasted, an unfavorable geologic body in front of a tunnel face can be found in time, a construction scheme can be optimized according to a real-time test result, and reference is provided for guaranteeing tunnel construction safety.

Description

technical field [0001] The disclosure relates to the technical field of tunnel boring machines, in particular to a system and method for testing the quartz content of slag used in TBM. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] Tunnel TBM (Tunnel Boring Machine, full-face hard rock tunnel boring machine) construction method has the advantages of fast excavation speed, excellent hole quality, small engineering disturbance, safety and economy. However, TBM construction is sensitive to rock mass conditions, and changes in surrounding rock properties have an important impact on TBM tunneling efficiency and tool wear. According to statistics, the time and cost of tool replacement due to wear and tear account for more than one-third of the overall tunnel construction cost. Rock slag is the direct product of rock-mechanical action during...

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Problems solved by technology

[0006] (1) The quartz content of the surrounding rock on the side of the TBM is measured by the TBM-mounted rock quartz content measurement system, and the measurement position is relatively fixed, which is not representative;

[0007] (2) Other indicators such as hardness and wear resistance are used to establish a comparison database, but rock hardness and wear resistance are also affected by other factors, so the comprehensive evaluation model is relatively rough, and the accuracy of the obtained results is limited;

[0008] (3) The X-ray diffraction method takes a long time to test, cannot provide real-time feedback, and has information lag, which cannot meet the real-time acquisition of rock mass information by TBM excavation; the prediction method based on the evaluation model has large errors, and it is difficult to meet the requirements of TBM excavation for rock mass information. to obtain accurate actual needs

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