A rapid measurement and analysis method for rock mass structure characteristics in underground engineering

Abstract

A method for rapid measurement and analysis of rock mass structure characteristics in underground engineering, comprising the following steps: Step 1, determine the survey area according to the survey purpose, and divide the area into several sub-areas with large-scale geological structures such as faults as boundaries; Step 2, in the survey Divide several measuring points in the area, and the measuring points are arranged at intervals in the survey area; step 3, according to the occurrence characteristics of the joints within the range of the measuring points, divide the dominant joint group, and according to the trend occurrence characteristics of each dominant joint group, use The central point of the measuring point is the center of the joint measurement window; step 4, based on the joint measurement window, the measurement and analysis of the tendency, inclination, average joint spacing and average trace length of the joint are carried out; the present invention overcomes the traditional joint investigation method. The measurement and statistics of the full sample of information have the disadvantages of large on-site workload, many on-site measurement indicators, and lagging statistical analysis work, etc., which can realize rapid and accurate measurement and analysis of rock mass structural surfaces in underground spaces.

Description

technical field [0001] The invention relates to the technical fields of geological engineering, geotechnical engineering, mining engineering and shaft engineering, in particular to a rapid measurement and analysis method for underground engineering rock mass structure characteristics. Background technique [0002] Rock mass is the general term for in-situ media containing bedding, faults, joints, folds, and other structural features. The reason why rock mass is different from other engineering materials is that it contains various types of joints (rock mass structural planes) inside, which makes it have heterogeneous and anisotropic engineering properties. Obviously, the structure of rock mass has a decisive influence on the stability of rock mass in underground engineering. Therefore, in order to optimize the stability of underground engineering, it is necessary to measure and analyze the rock mass structure through certain means to find out the distribution law, developme...

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Problems solved by technology

However, the traditional surveying line method and sampling window method have no corresponding regulations on the selection of surveying line and sampling window. They are generally arranged along the axis of the roadway. The measurement method has problems such as heavy workload, lagging data statistics, long cycle, and large measurement error, which seriously affects the analysis and design of rock mass engineering stability by underground engineering designers, and increases the risk of unpredictable underground engineering.

At present, the development of measurement technology for rock mass structure characteristics in underground engineering mainly focuses on the research and development of non-contact measurement methods (laser scanning and stereo photography technology) to realize the digital acquisition of rock mass structure information, but there is no significant improvement in the measurement method , and there is no new fast and accurate measurement method proposed

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