CN112580958A - Comprehensive characterization method for joint development of rock mass - Google Patents
Comprehensive characterization method for joint development of rock mass Download PDFInfo
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- CN112580958A CN112580958A CN202011469642.8A CN202011469642A CN112580958A CN 112580958 A CN112580958 A CN 112580958A CN 202011469642 A CN202011469642 A CN 202011469642A CN 112580958 A CN112580958 A CN 112580958A
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- 239000011435 rock Substances 0.000 title claims abstract description 51
- 238000011161 development Methods 0.000 title claims abstract description 20
- 238000012512 characterization method Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000011160 research Methods 0.000 claims abstract description 12
- 238000005259 measurement Methods 0.000 claims abstract description 10
- 238000007619 statistical method Methods 0.000 claims abstract description 5
- 230000009897 systematic effect Effects 0.000 abstract description 2
- 239000002927 high level radioactive waste Substances 0.000 description 2
- 238000013441 quality evaluation Methods 0.000 description 2
- 244000307545 Elaeagnus angustifolia Species 0.000 description 1
- 235000017643 Elaeagnus angustifolia Nutrition 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
- G06Q10/063—Operations research, analysis or management
- G06Q10/0639—Performance analysis of employees; Performance analysis of enterprise or organisation operations
- G06Q10/06393—Score-carding, benchmarking or key performance indicator [KPI] analysis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V9/00—Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/18—Complex mathematical operations for evaluating statistical data, e.g. average values, frequency distributions, probability functions, regression analysis
Abstract
The invention discloses a comprehensive characterization method for rock joint development, which relates to the technical field of rock mass grading and specifically comprises the following steps: the method comprises the following steps: selecting a research area, and then carrying out field measurement on outcrop joints distributed in the research area; step two: statistical analysis is carried out on the measurement results, then occurrence data of outcrop joints are obtained, joint advantage groups with good development in a research area are determined, and the number W of the joint advantage groups is obtainedn(ii) a Step three: the average trace length and the trace midpoint areal density of each joint on the outcrop are estimated by using a circular window method, and then the average value D of each hole is respectively calculatedaAnd L; step four: according to Wn、DaAnd the value of L, and combining the formula with fig. 1-4 to quantitatively calculate the JSR value for the study region. The invention can represent the cutting degree of the joint fracture system to the rock massAnd the connectivity of the joint network, and the expression of the integrity degree of the rock mass and the connectivity of the joint fracture are more systematic and comprehensive.
Description
Technical Field
The invention relates to the technical field of rock mass grading, in particular to a comprehensive characterization method for rock mass joint development.
Background
The classification of surrounding rocks and the classification of rock masses are a basic method for comprehensively evaluating the quality and stability of rock masses, which is always an important subject in the field of rock engineering research, and corresponding rock mass quality classification schemes are provided aiming at the characteristics of different types of rock mass engineering.
The HRC surrounding rock classification system proposed by Hagros of Helsinki university is a representative achievement of rock mass quality classification of high-level waste disposal engineering, and main research and evaluation objects are a disposal warehouse, a disposal tunnel and a disposal pit; a high level radioactive waste disposal rock mass grading system QHLW provided by old and bright is mainly used for researching rock masses in a preselected area, the methods are established on the basis of a Q system, and are different from complete rocks, the properties of the rock masses are determined in the distribution of joint systems in the rock masses to a great extent, at present, most rock mass grading systems take the characteristics of structural planes in the rock masses as one of the most main parameters of the rock mass grading systems, Deere provides rock index classification, the rock mass quality is judged according to the completeness of rock cores during drilling, the rock masses are classified by taking the cumulative length of the rock cores with the length of more than or equal to 10cm as the percentage of the total length of a drill hole, the RQD value of the rock cores is controlled by the joint in the rock masses, and quantitative indexes are provided for the rock; palmstrom considers that under the condition of no rock core, the RQD value can be estimated according to the number of joints in a unit area, and the parameter B in rock mass structure classification is graded on the basis of the joint distance while the influence of the joint dominant direction on roadway excavation is considered.
Through the analysis, the rock mass joint is an important parameter in a rock mass quality grading system, but different parameters are adopted in different grading systems to represent the joint, different projects have different side weights on rock mass quality evaluation in the application process, and a method capable of comprehensively representing rock mass joint development is lacked.
Therefore, it is necessary to develop a comprehensive characterization method for rock joint development to solve the above problems.
Disclosure of Invention
The invention aims to provide a comprehensive characterization method for rock joint development, which aims to solve the problems that different parameters are adopted to characterize joints in different grading systems proposed in the background art, different projects have different priorities for rock quality evaluation in the application process, and a method capable of comprehensively characterizing rock joint development is lacked.
In order to achieve the purpose, the invention provides the following technical scheme: a comprehensive characterization method for rock joint development specifically comprises the following steps:
the method comprises the following steps: selecting a research area, and then carrying out field measurement on outcrop joints distributed in the research area;
step two: statistical analysis is carried out on the measurement results, then occurrence data of outcrop joints are obtained, joint advantage groups which are good in development nearby the drill holes are determined, and the number W of the joint advantage groups is obtainedn；
Step three: the average trace length and the trace midpoint areal density of each joint on the outcrop are estimated by using a circular window method, and then the average value D of each hole is respectively calculatedaAnd L;
step four: according to Wn、DaAnd the value of L, and combining the formula with FIGS. 1-4 to quantitatively calculate the JSR value for the study region:
wherein, WnValue of credit, D, representing the joint dominance groupaRepresentsThe score value of the joint density, L represents the score value of the size of the joint.
Preferably, the number of the joint groups WnThe classification is done in several classes including, but not limited to, almost no joints, 1 group, 2 groups, 3 groups, 4 groups, rubble.
Preferably, the average midpoint density D isaClassified into several classes including, but not limited to, very sparse, medium density, dense, very dense;
average midpoint density Da<0.2m-2While, the average midpoint density DaIs very thin;
0.2m-2average midpoint density D of not more thana<0.6m-2While, the average midpoint density DaIs sparse;
0.6m-2average midpoint density D of not more thana≤2m-2While, the average midpoint density DaIs of medium density;
2m-2average midpoint density D of not more thana≤6m-2While, the average midpoint density DaIs dense;
number of joint groups Wn≥6m-2While, the average midpoint density DaIs very dense.
Preferably, the average trace length L is divided into several levels, including but not limited to very short, medium length, long, very long;
number of joint groups WnWhen the diameter is less than or equal to 1m, the number of the joint groups WnIs very short;
2m is less than or equal to the number of joint groups Wn<3m, the number of the joint groups WnIs short;
number of joints W is less than or equal to 3mn<10m, the number of the joint groups WnIs of medium length;
number of joints W is not less than 10mn<20m, the number of the joint groups WnIs long;
number of joint groups WnWhen the length is more than or equal to 20m, the number of the joint groups WnIs very long.
The invention has the technical effects and advantages that:
the JSR is characterized by the number of joint groups, the joint density and the joint size, so that the cutting degree of a joint fracture system to a rock body and the connectivity of a joint network are further characterized, and the expression of the integrity degree of the rock body and the connectivity of the joint fracture is more systematic and comprehensive.
Drawings
FIG. 1 shows the number of joint advantage groups (W) according to the present inventionn) And (4) scoring.
FIG. 2 is a graph of the average midpoint areal density of the present invention
And (4) scoring.
FIG. 3 is an average trace length of the present invention
And (4) scoring.
FIG. 4 is a table depicting the development degree of the joints and the size of the rock mass according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a comprehensive characterization method for rock joint development, which specifically comprises the following steps:
the method comprises the following steps: selecting a research area, and then carrying out field measurement on outcrop joints distributed in the research area;
step two: statistical analysis is carried out on the measurement results, then occurrence data of outcrop joints are obtained, joint advantage groups which are good in development nearby the drill holes are determined, and the number W of the joint advantage groups is obtainedn；
Step three: estimating the average trace length and the trace midpoint of each joint on the outcrop by using a circular window methodThe surface density, and further the average value D of each hole is obtainedaAnd L;
step four: according to Wn、DaAnd the value of L, and combining the formula with FIGS. 1-4 to quantitatively calculate the JSR value for the study region:
wherein, WnValue of credit, D, representing the joint dominance groupaRepresents the score value of the joint density, and L represents the score value of the size of the joint.
More specifically, referring to FIG. 1, the number of joint groups WnThe classification is done in several classes including, but not limited to, almost no joints, 1 group, 2 groups, 3 groups, 4 groups, rubble.
More specifically, referring to fig. 2, the average midpoint density D is setaThe grading is divided into a plurality of grades, including but not limited to very sparse, medium density, dense and very dense, and the corresponding grades are respectively 1.0, 1.0-1.5, 2.0-2.5, 3.0-3.5, 4.0-4.5 and 5;
average midpoint density Da<0.2m-2While, the average midpoint density DaThe corresponding score is 0-4 for being very thin;
0.2m-2average midpoint density D of not more thana<0.6m-2While, the average midpoint density DaThe weight is sparse, and the corresponding score is 4-8;
0.6m-2average midpoint density D of not more thana≤2m-2While, the average midpoint density DaThe medium density is 8-12;
2m-2average midpoint density D of not more thana≤6m-2While, the average midpoint density DaThe corresponding score is 12-16 when the number is dense;
number of joint groups Wn≥6m-2While, the average midpoint density DaThe score is 16-20.
More specifically, referring to FIG. 3, the average trace length L is divided into several levels, including but not limited to very short, medium length, long, very long;
number of joint groups WnWhen the diameter is less than or equal to 1m, the number of the joint groups WnIs very short, and has a corresponding score of 0-3;
2m is less than or equal to the number of joint groups Wn<3m, the number of the joint groups WnShort, with a corresponding score of 3-6;
number of joints W is less than or equal to 3mn<10m, the number of the joint groups WnThe length is medium, and the corresponding score is 6-9;
number of joints W is not less than 10mn<20m, the number of the joint groups WnIs long, and the corresponding score is 9-12;
number of joint groups WnWhen the length is more than or equal to 20m, the number of the joint groups WnThe length is very long, and the corresponding score is 12-15.
Example (b):
carrying out on-site measurement on outcrop joints distributed in the range of 1km around a new BS32 drilled hole in a northern mountain and a BS29 drilled hole in an elaeagnus angustifolia garden, carrying out statistical analysis on the measurement results, further obtaining occurrence data of the outcrop joints, determining a joint advantage group with good development nearby the drilled holes, and obtaining the number W of the joint advantage groupsnThe average trace length and the trace midpoint areal density of each joint on the outcrop are estimated by a circular window method, and the average value D of each hole is further calculatedaAnd L, according to Wn、DaAnd the value of L, and combining the formula with the JSR value of the research region calculated quantitatively in the figure 1-figure 4;
wherein the content of the first and second substances,
Wnvalue of credit, D, representing the joint dominance groupaRepresents the score value of the joint density, and L represents the score value of the size of the joint.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (4)
1. A comprehensive characterization method for rock joint development is characterized by comprising the following steps:
the method comprises the following steps: selecting a research area, and then carrying out field measurement on outcrop joints distributed in the research area;
step two: statistical analysis is carried out on the measurement results, then occurrence data of outcrop joints are obtained, joint advantage groups which are good in development nearby the drill holes are determined, and the number W of the joint advantage groups is obtainedn；
Step three: the average trace length and the trace midpoint areal density of each joint on the outcrop are estimated by using a circular window method, and then the average value D of each hole is respectively calculatedaAnd L;
step four: according to Wn、DaAnd the value of L, and combining the formula with FIGS. 1-4 to quantitatively calculate the JSR value for the study region:
wherein, WnValue of credit, D, representing the joint dominance groupaRepresents the score value of the joint density, and L represents the score value of the size of the joint.
2. The comprehensive characterization method for rock mass joint development according to claim 1, characterized in that: the number W of the joint groupsnThe classification is done in several classes including, but not limited to, almost no joints, 1 group, 2 groups, 3 groups, 4 groups, rubble.
3. The comprehensive characterization method for rock mass joint development according to claim 1, characterized in that: the average midpoint density DaIs divided into a plurality ofGrades, including but not limited to very sparse, medium density, dense, very dense;
average midpoint density Da<0.2m-2While, the average midpoint density DaIs very thin;
0.2m-2average midpoint density D of not more thana<0.6m-2While, the average midpoint density DaIs sparse;
0.6m-2average midpoint density D of not more thana≤2m-2While, the average midpoint density DaIs of medium density;
2m-2average midpoint density D of not more thana≤6m-2While, the average midpoint density DaIs dense;
number of joint groups Wn≥6m-2While, the average midpoint density DaIs very dense.
4. The comprehensive characterization method for rock mass joint development according to claim 1, characterized in that: dividing the average trace length L into several levels including, but not limited to, very short, medium length, long, very long;
number of joint groups WnWhen the diameter is less than or equal to 1m, the number of the joint groups WnIs very short;
2m is less than or equal to the number of joint groups Wn<3m, the number of the joint groups WnIs short;
number of joints W is less than or equal to 3mn<10m, the number of the joint groups WnIs of medium length;
number of joints W is not less than 10mn<20m, the number of the joint groups WnIs long;
number of joint groups WnWhen the length is more than or equal to 20m, the number of the joint groups WnIs very long.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103823038A (en) * | 2013-12-11 | 2014-05-28 | 广西高峰矿业有限责任公司 | Method for grading engineering stability of jointed rock mass |
| US20140180593A1 (en) * | 2011-06-02 | 2014-06-26 | Jan Schmedes | Joint Inversion with Unknown Lithology |
| CN109374047A (en) * | 2018-10-15 | 2019-02-22 | 东北大学 | A kind of underground engineering structure characteristics of rock mass rapid measuring analysis method |
-
2020
- 2020-12-14 CN CN202011469642.8A patent/CN112580958A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140180593A1 (en) * | 2011-06-02 | 2014-06-26 | Jan Schmedes | Joint Inversion with Unknown Lithology |
| CN103823038A (en) * | 2013-12-11 | 2014-05-28 | 广西高峰矿业有限责任公司 | Method for grading engineering stability of jointed rock mass |
| CN109374047A (en) * | 2018-10-15 | 2019-02-22 | 东北大学 | A kind of underground engineering structure characteristics of rock mass rapid measuring analysis method |
Non-Patent Citations (1)
| Title |
|---|
| 李松林: "高放废物地质处置阿奇山岩体地表节理特征及岩体质量研究", 《中国优秀硕士学位论文全文数据库》 * |
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