Representative sampling method of series-scale rock mass structural plane model
A structural surface, representative technology, applied in the direction of sampling device, character and pattern recognition, image data processing, etc., can solve the problem that the representative sampling of series-scale rock mass structural surface models cannot be realized, and achieve the effect of improving the overall efficiency
Pending Publication Date: 2019-11-05
SHAOXING UNIVERSITY
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[0004] In order to overcome the inability of the existing technology to realize the representative sampling of series-scale rock mass structural plane models, the present invention provides a series-scale rock mass structural plane representative sampling method, which provides a series of scale representative joints for the study of structural plane size effects sample
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specific Embodiment approach
[0033] This example is illustrated by the structural surface of natural rock mass, and the specific implementation method is as follows:
[0034] 1) Use a portable laser scanner (MetraSCAN 3D, Creaform, Canada) to obtain the 3D topography data of the structure surface in a large range of sizes, and then intercept the 3D point cloud data of the required research structure surface with a square plane size range of 1000 mm × 1000 mm, such as figure 1 shown.
[0035] 2) Based on the statistical method of progressive full coverage, a series of samples with structural surface sizes of 100mm×100mm, 200mm×200mm, 900mm×900mm were obtained, and the propulsion distances were calculated to be 90mm, 80mm, 70mm, 60mm, 50mm, 40mm , 30mm, 20mm, and 10mm, the sample size of each structural surface is As shown in Table 1.
[0036] sample size Δd N 100mm×100mm 90 121 200mm×200mm 80 121 300mm×300mm 70 121 400mm×400mm 60 121 500mm×500mm 50 121 ...
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A representative sampling method of a series-scale rock mass structural plane model is provided by combining a K central point clustering algorithm, and can automatically divide an overall sample according to a specified class cluster number and screen out a sample with a minimum relative error from each class cluster, thereby realizing representative sampling. According to the method, a progressive full-coverage statistical method is introduced to obtain a series of scale structural plane samples, and conditions are created for representative sampling of large-size joint samples; representative sampling is carried out in combination with a K central point clustering algorithm, so that automatic and reasonable distribution of joint samples is realized under the condition of meeting the sampling precision, and the overall efficiency of representative sampling of the structural plane is improved.
Description
technical field [0001] The invention relates to a representative sampling method of series-scale rock mass structural surface models, which is suitable for selecting model structural surface samples capable of representing different sizes to carry out indoor direct shear tests. Background technique [0002] It is well known that the shear strength of rock discontinuities is greatly affected by size changes. In order to reveal the size effect of its shear behavior, it is necessary to conduct direct shear tests on structural surfaces of different sizes. However, the direct shear test is a destructive test and is not repeatable, so it is necessary to make a corresponding structural surface model sample. Therefore, it is the key to study the size effect law of rock mass discontinuity planes to reasonably select samples of surface relief shapes that can represent different sizes. [0003] At present, the structural surface sampling methods mainly include: random sampling method...
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Login to View More IPC IPC(8): G06T7/60G06K9/62G01N1/04
CPCG06T7/60G01N1/04G06F18/23213
Inventor 黄曼马成荣洪陈杰罗战友杜时贵徐常森杨飞
Owner SHAOXING UNIVERSITY