阅读说明：本技术 一种穿插不规则侵入岩、脉的复杂工程地质岩组分类方法 (Complex engineering geological rock group classification method for inserting irregular invaded rocks and veins ) 是由 刘思丁 肖华波 杨静熙 彭仕雄 梅稚平 于 2019-10-16 设计创作，主要内容包括：本发明公开了一种穿插不规则侵入岩、脉的复杂工程地质岩组分类方法,解决了侵入岩1、脉在延伸方向上形态极不规则的问题。本发明提出采用反映岩组综合地质特性的综合纵波波速对穿插不规则侵入岩1、脉的复杂工程地质岩组进行快速分类的方法,后期针对该类复杂工程地质岩组,仅需通过测试岩组内各侵入岩1、原岩纵波波速,在确定侵入岩1/原岩厚度占比后可快速地进行该类复杂工程地质岩组工程地质分类,为后期大量该类复杂工程地质岩组进行工程适宜性评价提供基础与支撑,同时也为后期针对该类复杂工程地质岩组工程处理设计方案等提供有力依据。(The invention discloses a complex engineering geological rock group classification method for inserting irregular invaded rocks and veins, which solves the problem that the invaded rocks 1 and veins are extremely irregular in shape in the extending direction. The invention provides a method for rapidly classifying complex engineering geological rock groups penetrated and inserted with irregular invaded rocks 1 and veins by adopting comprehensive longitudinal wave velocity reflecting comprehensive geological characteristics of the rock groups, aiming at the complex engineering geological rock groups, the complex engineering geological rock group engineering geological classification can be rapidly carried out after the invaded rock 1/original rock thickness ratio is determined only by testing the longitudinal wave velocity of each invaded rock 1 and original rock in the rock groups in the later period, so that a foundation and a support are provided for evaluating engineering suitability of a large number of complex engineering geological rock groups in the later period, and meanwhile, a powerful basis is provided for engineering processing design schemes and the like aiming at the complex engineering geological rock groups in the later period.)

1. A complex engineering geological rock group classification method for inserting irregular invaded rocks and veins is characterized by comprising the following steps:

A. acquiring longitudinal wave velocity Vp of each engineering geological rock in a survey area, and taking the average value of the longitudinal wave velocity Vp of each rock as corresponding standard values Vpr (1), (2) and (3) … (n 1);

B. carrying out on-site geological survey and test to obtain the color, structure, mineral composition and content of rocks in a survey area, and dividing invaded rocks and original rocks in the survey area by combining with geological environment conditions in the survey area;

C. respectively carrying out longitudinal wave velocity Vp test on the invaded rock and the original rock mass in the investigation region according to the dividing result of the invaded rock and the original rock to obtain the average longitudinal wave velocity Vpr (a), (b) and (c) … (n2) of each section of invaded rock and the original rock mass in the investigation region, and calculating the comprehensive longitudinal wave velocity Vpz of the invaded rock and the original rock mass in the investigation region according to the thickness ratio of the invaded rock and the original rock mass in the investigation region;

D. and comparing and analyzing the comprehensive longitudinal wave velocity Vpz with the average value Vpr (1), (2) and (3) … (n1) of the longitudinal wave velocity Vpz of each rock mass to determine the rocks I, II and III … (n3) of the engineering geological rock group.

2. The method as claimed in claim 1, wherein the longitudinal wave velocity Vp of each rock in step A is obtained by statistical analysis of the longitudinal wave velocity Vp of each rock in a plurality of exploratory galleries in the engineering area.

3. The method for classifying the rock mass of the complex engineering geological penetrated irregular invaded rocks and veins according to claim 1, characterized in that the test in the step B adopts a rock lapping test to find out the mineral types, compositions and contents of rock samples.

4. The method for classifying complex geological rock groups penetrated by irregular invaded rocks and veins according to claim 1, wherein in the step C, longitudinal wave velocity tests are respectively carried out on the invaded rocks and the original rocks within the investigation range to obtain the average longitudinal wave velocity Vpr (a), (b) and (C) … (n2) of each section of invaded rocks and the original rocks, the weighted average of the longitudinal wave velocity is carried out on the specific invaded rocks and original rock thickness ratios, and the comprehensive longitudinal wave velocity Vpz is calculated, wherein the invaded rock and original rock thickness ratio (X) is calculated according to the proportion of the invaded rocks and the original rock thickness (D) to the total thickness (D) of the rock group, namely: the thickness ratio (X) is the thickness (D) of the invaded or virgin rock/total thickness (D) of the rock group.

5. The method for classifying complex geological rock groups penetrated by irregular invaded rocks and veins according to claim 1, wherein in the step D, the rock group engineering geological classification is carried out by taking the average value L of longitudinal wave velocity Vp of each rock mass in the step A as an L-Vpr (1), (2) and (3) … (n1) as a section limit value and taking the comprehensive longitudinal wave velocity Vpz1, Vpz2 and Vpz3 … Vpz n4 of each rock group as a standard when the L-Vpr (1), (2) and (3) … (n1) are in different sections.

Technical Field

The invention relates to the field of geotechnical and hydroelectric engineering, in particular to a complex rock group engineering geological classification method applied to later-stage irregular invasion of rocks and veins.

Background

The invaded rock is igneous rock formed by rock pulp in a soft flow layer penetrating into a structural cavity formed in the same period, and crystallizing and condensing in the depth of the earth crust. In the process of the invasion of the magma, the magma is influenced by the conditions and the structures of the original rocks, the regularity of the output form, the scale, the spread and other geometrical forms of the dike is poor, and meanwhile, the magma is influenced by thermal contact metamorphism, the dike injection-substitution and the later-stage structure, the physical and mechanical properties of the rocks are changed, and engineering geological defects such as weak interlayers are often formed.

Under the influence of the original rock type, the integrity of rock mass and the later-stage tectonic geological action, the invaded rocks and veins are in thickness change, bent and folded, changed into stones and crushed in the extending direction, the shapes are extremely irregular, the combination form is complex, the mechanical property difference is large, the regularity is not strong, and at present, a method for quickly classifying the complex engineering geological rock groups aiming at the irregularly invaded rocks and veins is not available.

Disclosure of Invention

The invention aims to provide a complex engineering geological rock group classification method for inserting irregular invaded rocks and veins, and solves the problems that the invaded rocks and veins are in thickness change in the extending direction, are bent and folded, are encrusted by stones, are pincered, are irregular in shape, are complex in combination form, are large in mechanical property difference and are not strong in regularity.

The invention is realized by the following technical scheme:

a complex engineering geological rock group classification method for inserting irregular invaded rocks and veins comprises the following steps:

A. acquiring longitudinal wave velocity Vp of each engineering geological rock in a survey area, and taking the average value of the longitudinal wave velocity Vp of each rock as corresponding standard values Vpr (1), (2) and (3) … (n 1);

B. carrying out on-site geological survey and test to obtain the color, structure, mineral composition and content of rocks in a survey area, and dividing invaded rocks and original rocks in the survey area by combining with geological environment conditions in the survey area;

C. respectively carrying out longitudinal wave velocity Vp test on the invaded rock and the original rock mass in the investigation region according to the dividing result of the invaded rock and the original rock to obtain the average longitudinal wave velocity Vpr (a), (b) and (c) … (n2) of each section of invaded rock and the original rock mass in the investigation region, and calculating the comprehensive longitudinal wave velocity Vpz of the invaded rock and the original rock mass in the investigation region according to the thickness ratio of the invaded rock and the original rock mass in the investigation region;

D. and comparing and analyzing the comprehensive longitudinal wave velocity Vpz with the average value Vpr (1), (2) and (3) … (n1) of the longitudinal wave velocity Vpz of each rock mass to determine the rocks I, II and III … (n3) of the engineering geological rock group.

The complicated engineering geological rock group of the irregularly invaded rocks and veins refers to that two or more rock veins with different scales are randomly and alternately distributed in original rocks, when the invaded rocks and veins are distributed on engineering parts such as a hydroelectric engineering high dam foundation, a large-span underground cavern group, a high and steep side slope and the like, the deformation resistance and the stability condition of a building are often determined or controlled, in order to meet the evaluation requirement of engineering suitability, the engineering geological properties of the complicated engineering geological rock group of the irregularly invaded rocks and veins need to be classified according to a certain rule, principle and method, and from the engineering and technical aspects, the invaded rocks and veins are difficult to be systematically divided into independent engineering geological units for classification research, and the invaded rocks and veins need to be subjected to appropriate engineering geological generalization and engineering geological classification.

After the engineering geology of the engineering geology rock group is generalized according to the distribution characteristics and the spreading rule, the mechanical characteristic difference is large, the regularity is low, the engineering geology classification method in the current relevant regulation specification is not suitable for the complex engineering geology rock group of irregular invaded rocks and veins, if the main comprehensive mechanical parameters of each invaded rock after the engineering geology is generalized are determined one by one and limited by the application range and conditions of an exploration test, the tested relevant mechanical parameters have larger deviation with the real condition, the accuracy of the engineering geology classification is influenced, and the engineering geology classification cost and the period can not meet the control requirements of the exploration design cost and the construction period.

The invention provides a complex engineering geological rock group engineering geological classification method aiming at penetrating irregular invaded rocks and veins, which takes the longitudinal wave velocity of a rock body as an entry point, calculates the comprehensive longitudinal wave velocity Vpz of the rock group according to the thickness ratio of invaded rocks/original rocks (after engineering geological generalization) on the basis of testing and counting the average value Vpr (1), (2) and (3) … (n1) of the longitudinal wave velocity Vpr of each invaded rock/original rock body, and carries out rock group engineering geological classification by taking different intervals of L-Vpr (1), (2) and (3) … (n1) of the comprehensive longitudinal wave velocity Vpz1, Vpz2 and Vpz3 … Vpzn4 of each rock group as standards.

Further, the longitudinal wave velocity Vp of each engineering geological rock in the step A is obtained by carrying out statistical analysis according to the longitudinal wave velocity of each rock in a large amount of exploration footrill of the engineering area.

And further, in the step B, a rock grinding test is adopted to find out the type, the composition and the content of the rock sample minerals.

Further, in the step C, longitudinal wave velocity tests are respectively carried out on the invaded rock and the original rock within the investigation range to obtain average longitudinal wave velocity vpr (a), (b) and (C) … (n2) of rock mass of each section of invaded rock and the original rock, the weighted average of the longitudinal wave velocity is carried out according to the specific thickness proportion of the invaded rock and the original rock, and the comprehensive longitudinal wave velocity Vpz is calculated, wherein the thickness proportion (X) of the invaded rock and the original rock is calculated according to the proportion of the thickness (D) of the invaded rock and the original rock to the total thickness (D) of the rock group, namely: the thickness ratio (X) is the thickness (D) of the invaded or virgin rock/total thickness (D) of the rock group.

Further, in step D, the rock group engineering geology is classified based on the criterion that the average value L of the longitudinal wave velocities Vp of the rock masses in step a is Vpr (1), (2), and (3) … (n1) as a section limit value, and the comprehensive longitudinal wave velocities Vpz1, Vpz2, and Vpz3 … Vpz n of the rock groups are in different sections L is Vpr (1), (2), and (3) … (n 1).

The invention has the following advantages and beneficial effects:

the invention provides a method for rapidly classifying complex engineering geological rock groups penetrated and inserted with irregular invaded rocks and veins by adopting comprehensive longitudinal wave velocity reflecting comprehensive geological characteristics of the rock groups, aiming at the complex engineering geological rock groups, the complex engineering geological rock group engineering geological classification can be rapidly carried out only by testing each invaded rock/original rock longitudinal wave velocity in the rock groups after determining the invaded rock/original rock thickness ratio, so that a foundation and a support are provided for evaluating engineering suitability of a large number of complex engineering geological rock groups in the later period, and meanwhile, a powerful basis is provided for engineering processing design schemes and the like aiming at the complex engineering geological rock groups in the later period.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 is a schematic diagram of a complex engineering geological rock group with irregular invasion of rocks and veins.

Reference numbers and corresponding part names in the drawings:

1-invaded rock, 2-virgin rock.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the present invention. In other instances, well-known structures, circuits, materials, or methods have not been described in detail so as not to obscure the present invention.

Throughout the specification, reference to "one embodiment," "an embodiment," "one example," or "an example" means: the particular features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment of the invention. Thus, the appearances of the phrases "one embodiment," "an embodiment," "one example" or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Further, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the description of the present invention, it is to be understood that the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the scope of the present invention.