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Method for measuring and calculating rock mass fracture rate in field

A technology of on-site measurement and fracture ratio, applied in the field of field measurement and statistics of rock mass fracture ratio, to achieve the effect of clear process

Inactive Publication Date: 2015-11-25
WUHAN MAIGERUI GEOLOGICAL ENVIRONMENTAL TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a relatively objective method for measuring and counting the crack rate of rock mass in the field, which solves the shortcomings of the above-mentioned existing methods

Method used

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  • Method for measuring and calculating rock mass fracture rate in field
  • Method for measuring and calculating rock mass fracture rate in field
  • Method for measuring and calculating rock mass fracture rate in field

Examples

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Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 Greening project for high and steep rocky slopes in a certain area of ​​Jinan City:

[0029] In the preliminary crack measurement and statistical work, the method of the present invention is used to measure and count limestone rock masses in many areas of Jinan City. In terms of specific implementation, it is in accordance with figure 1 The steps described in the method are carried out, specifically:

[0030] (1) Collect basic data on stratigraphy and tectonic history in a certain area in Jinan. From the data, we know that the tectonic stress field in the Jinan area is mainly horizontal, the inclination angle of the maximum principal stress axis σ1 and the minimum principal stress axis σ3 is less than 20°, the direction of the maximum principal stress is northeast, and the orientation is NE60°~80° °, the orientations of the mean principal stress axes are σ1, σ2 and σ3 are 251°, 159°, and 342°, respectively. In addition, there have been several major tectoni...

Embodiment 2

[0044] Example 2: Investigation of Fracture Ratio of Limestone Slope in Fenghuang Mountain, Xinxiang, Henan

[0045] When studying the ecological geological indicators of plant growth on limestone slopes, this method was used to investigate the limestone slopes of Fenghuang Mountain in Xinxiang, and the exposed high and steep artificial slopes with plant growth were selected to measure the body fracture ratio of rock mass . The measurement methods are: collecting geological data in the Fenghuangshan area of ​​Xinxiang; conducting field geological surveys in the Fenghuangshan area; preliminarily judging the number of joint surface groups of the rock mass in the Fenghuangshan area, and determining the location and size of the measurement unit; measuring each group of joint surface fissures. The trace length, width, and occurrence of the fracture surface are used to further determine the number of joint surface groups; the total volume of each group of fractures and the fracture ...

Embodiment 3

[0055] Example 3: Survey on Fracture Ratio of Jinping Mountain in Yiyang, Henan

[0056] Before the quarrying mouth and rock slope greening construction in the Jinpingshan area of ​​Yiyang, Henan, the method provided by the present invention was used to measure and count the volume crack ratio of 27 mouths in the area, and the measurement range included 27 rock walls. There are 2,315 fissures, mainly including structural fissures and layer fissures. The survey steps and statistical tables are the same as those in Case 1 and Case 2. The survey results show that the rock wall fissures in Jinpingshan quarry are generally in groups 3 to 5, and some There are 7 groups of cracks in the wall, the gap width is about 1mm, and the maximum is 1cm. According to the calculation, the fracture rate of the rock wall is about 3% to 5%, up to 7% in some places, and the smallest exceeds 2‰. Table 4 shows the characteristic measurement results of the body fracture rate in Yiyang area.

[0057] T...

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Abstract

The invention discloses a method for measuring and calculating the rock mass fracture rate in the field, which comprises the steps of collecting geological data of an area to be measured; carrying out field geological reconnaissance; preliminary judging the number of groups of the joint planes, and determining the position and the size of a unit body; measuring the trace length, the fracture width and the attitude of each fracture plane of each group of the joint plane fractures, and further judging the number of groups of the joint planes; and calculating the total volume of each group of fractures and the rock mass fracture rate. The method disclosed by the invention renovates an inherent method for measuring the line fracture rate and the plane fracture rate, can acquire data of the rock mass fracture rate with high reliability on the basis of relatively convenient measurement, and is clear in process. The method disclosed by the invention can be applied to the engineering technology fields such as hydraulic and hydro-power engineering geology, geotechnical engineering investigation, rock mass seepage calculation, high and steep slope green plant covering and the like.

Description

technical field [0001] The invention relates to professional technical fields such as geological survey, geotechnical engineering, hydrogeology and rock slope greening, and in particular to a method for field measurement and statistics of rock mass fissure ratio. Background technique [0002] In actual production work, field geometric measurement of rock mass fracture ratio is required in many aspects, such as engineering projects involving construction in rock mass such as water conservancy and hydropower projects, mining projects, and national defense and military industries. However, there are strong heterogeneity and anisotropy in the fracture development of rock mass. The uncertainty of fracture development and the unknown occurrence have caused great difficulties in field measurement. How to measure rock mass in a relatively objective manner in the field? The fracture ratio of the body has always been a difficult problem in geological work. In the survey work, the fie...

Claims

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Application Information

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IPC IPC(8): G01V9/00
Inventor 周建伟温冰袁磊徐恒力宁立波
Owner WUHAN MAIGERUI GEOLOGICAL ENVIRONMENTAL TECH CO LTD
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