Quantitative design method for axis layout of large underground caverns in hard rock in high stress area of canyon
A technology for high-stress areas and underground caverns, applied in underground caverns, mining equipment, earthwork drilling and mining, etc., can solve problems that cannot reasonably reflect the spatial distribution characteristics of in-situ stress fields, reduce construction risks, be easy to implement, and achieve indicators clear effect
Active Publication Date: 2020-12-22
CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The stability of the surrounding rock of the cavern should be determined comprehensively by the components of the in-situ stress field. Simply using the horizontal projection direction of the maximum principal stress to determine the direction of the cavern axis cannot reasonably reflect the spatial distribution characteristics of the in-situ stress field.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0028] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments, but these embodiments should not be construed as limiting the present invention.
[0029] Such as figure 1 As shown, the implementation steps of a quantitative design method for axis layout of large-scale underground caverns in hard rock in high-stress areas of canyons in the present invention are as follows:
[0030] Step 1: In the preliminarily planned underground cavern layout area, select typical parts through on-site exploration ark for in-situ stress testing. Relief method to obtain the first principal stress value σ of the measuring point 10 and azimuth β 10 and inclination α 10 , the value of the second principal stress σ 20 Spatial distribution and azimuth β 20 and inclination α 20 , the value of the third principal stress σ 30 and azimuth β 30 and inclination α 30 spatial distribution. The number of ground stress measuring po...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a canyon high-stress area hard rock large underground cavern axis arrangement quantitative design method. The method comprises: obtaining an engineering area principal stress value, orientation and spatial distribution through in-situ ground stress testing and inversion analysis; calculating to obtain a damage stress intensity ratio by utilizing the obtained rock saturateduniaxial compressive strength and damage stress; carrying out hard rock judgment by adopting a saturated uniaxial compressive strength value; comprehensively performing high ground stress area division by adopting the first principal stress value and the rock strength-stress ratio; for the arrangement design of the hard rock underground cavern in the high-stress area, using the included angle between the maximum horizontal principal stress direction and the axis direction of the main cavern and the surrounding rock disturbance stress intensity ratio DSSR as the most important factors for determining the cavern arrangement; according to the judgment standard of the surrounding rock disturbance stress intensity ratio, quantifying the included angle between the maximum horizontal principal stress direction and the axis direction of the main cavern. The method has the advantages of being scientific, perfect, clear in index and easy to implement, the construction risk can be reduced, and the overall stability of the underground cavern group is improved.
Description
technical field [0001] The present invention relates to the technical field of underground cavern design methods, in particular to a quantitative design method for axis layout of large-scale underground caverns in hard rock in high-stress areas of canyons, which is suitable for layout design of large-scale underground caverns in high-stress areas dominated by hard and brittle rocks . Background technique [0002] With the implementation of my country's western development strategy, more and more large-scale hydropower projects and energy storage power stations have entered the construction period, and most of them are designed with large or super large underground caverns as the main hydraulic structures. Due to the strong modern crustal activity, high in-situ stress field and significant external dynamic geological action in the western region, most of the deep-buried large underground caverns in the western region are in a high in-situ stress environment. Studies have sho...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/13E21D13/00E21D9/14
CPCE21D9/14E21D13/00
Inventor 黄书岭丁秀丽张练何军雷菁张雨霆刘登学王旭一
Owner CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION