Rapid measurement and analysis method for rock mass structural features of underground engineering

Abstract

The invention relates to a rapid measurement and analysis method for rock mass structural features of underground engineering. The method comprises the following steps that: step one, a survey area isdetermined based on a survey purpose and the area is divided into a plurality of sub areas by using a large geological structure like a fault as a boundary; step two, a plurality of measuring pointsare divided in the survey area, wherein the measuring points are arranged in the survey area at intervals; step three, according to occurrence characteristics of the joints in the range of the measuring points, dominant joint groups are divided and joint measurement windows are arranged by using the center points of the measuring points as centers based on the trend occurrence characteristics of the dominant joint groups; and step four, the measurement and analysis of the tendency, the inclination angle, the average joint spacing and the average trace length of the joint are carried out basedon the joint measurement windows. Therefore, defects of large field work load, many needed measurement field indexes, and statistic analysis work delay due to the joint information full-sample measurement and statistics of the traditional surveying method are overcome; and the rapid and accurate measurement and analysis of rock mass structure surface of underground space are realized.

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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