A surrounding rock classification method and system

Abstract

The embodiment of the present invention provides a surrounding rock classification method and system, including: setting a number of pile numbers at equal intervals on one side of a cave wall; performing surrounding rock engineering geological segmentation on the cave, conducting preliminary surrounding rock classification on each of the surrounding rock engineering geological segments, and generating a preliminary surrounding rock classification table; controlling a rock impact sound decibel value detection instrument to detect the surrounding rock impact sound decibel value of each part at equal intervals along one side of the cave, and generating a surrounding rock impact sound decibel value statistical table based on the pile numbers and the surrounding rock impact sound decibel value of each part; summarizing the surrounding rock engineering geological segments belonging to the same surrounding rock preliminary classification level in the surrounding rock preliminary classification table to generate a surrounding rock preliminary level segmentation statistical table; using the surrounding rock preliminary level segmentation statistical table and the surrounding rock impact sound decibel value statistical table, calculating the average impact sound decibel value of the same surrounding rock preliminary classification level, and obtaining a surrounding rock preliminary level and average impact sound decibel value statistical table; and performing surrounding rock classification according to the surrounding rock preliminary level and average impact sound decibel value statistical table.

Description

Technical Field

[0001] The invention relates to a surrounding rock classification method and system. Background Art

[0002] With the rapid development of my country's construction industry, a large number of tunnels have been newly built in water conservancy, hydropower, railways, highways, rail transit and other industries. After years of geological experience summary, surrounding rock classification systems represented by industry specifications have been formed in various industries. At present, the surrounding rock classification systems of various engineering projects are basically based on the specifications, combined with the actual geological conditions and characteristics of each project, and improved to establish the surrounding rock classification system of the project.

[0003] In the existing technology, surrounding rock classification requires the use of many classification indicators, among which compressive strength is a more important indicator. The compressive strength is generally obtained by sampling the rock mass on site, transporting it back to the laboratory, and then obtaining the parameters through uniaxial testing. This makes the existing surrounding rock classification method require a lot of time and money, and the test can only select representative rock masses, and cannot carry out universal tests. Summary of the invention

[0004] In order to solve the technical problem that the existing surrounding rock classification method requires on-site rock sampling and then transporting it back to the laboratory for classification, resulting in the existing surrounding rock classification method having great limitations and being unable to carry out universal tests, an embodiment of the present invention provides a surrounding rock classification method and system.

[0005] The embodiment of the present invention is achieved through the following technical solutions:

[0006] In a first aspect, an embodiment of the present invention provides a surrounding rock classification method, comprising:

[0007] Several stakes are set at equal intervals on one side of the cave wall;

[0008] Divide the surrounding rock engineering geological sections of the cave, conduct preliminary classification of the surrounding rock for each of the surrounding rock engineering geological sections, and generate a preliminary classification table of surrounding rock;

[0009] Control the rock impact sound decibel value detection instrument to detect the surrounding rock impact sound decibel value at equal intervals along one side of the cave, and generate a surrounding rock impact sound decibel value statistical table based on the pile number and the surrounding rock impact sound decibel value of each part;

[0010] Summarize the surrounding rock engineering geological sections belonging to the same surrounding rock preliminary classification level in the surrounding rock preliminary classification table to generate a surrounding rock preliminary level section statistics table;

[0011] Using the surrounding rock preliminary grade segmentation statistics table and the surrounding rock impact sound decibel value statistics table, calculate the average impact sound decibel value of the same surrounding rock preliminary classification level, and obtain the surrounding rock preliminary grade and average impact sound decibel value statistics table;

[0012] The surrounding rock is graded according to the statistical table of preliminary grade of surrounding rock and average decibel value of impact sound.

[0013] Furthermore, the surrounding rock classification is carried out according to the statistical table of the preliminary grade of the surrounding rock and the average decibel value of the impact sound; including:

[0014] Remove the average impact sound decibel value corresponding to the highest surrounding rock preliminary level in the statistical table of surrounding rock preliminary levels and average impact sound decibel values;

[0015] The average decibel value of the impact sound of all the surrounding rock preliminary levels is assigned as follows:

[0016] According to the order of the surrounding rock preliminary levels, the average percussion sound decibel value corresponding to the previous level of the surrounding rock preliminary level is assigned to the next level of the surrounding rock preliminary level until the assignment of the average percussion sound decibel values ​​of all the surrounding rock preliminary levels is completed, and a statistical table of the assigned surrounding rock preliminary levels and the average percussion sound decibel values ​​is obtained;

[0017] The surrounding rock is graded according to the assigned preliminary grade of the surrounding rock and the statistical table of average decibel value of impact sound.

[0018] Furthermore, the surrounding rock classification is carried out according to the assigned preliminary grade of the surrounding rock and the statistical table of the average decibel value of the impact sound; including:

[0019] The maximum and minimum values ​​of the average impact sound decibel value in the statistical table of the assigned surrounding rock preliminary level and the average impact sound decibel value are limited according to the corresponding surrounding rock preliminary level, so as to obtain a comparison table of surrounding rock level and impact decibel value;

[0020] The surrounding rock is graded according to the comparison table of surrounding rock grade and impact decibel value.

[0021] Furthermore, the surrounding rock is graded according to the comparison table of surrounding rock grade and impact decibel value; and also includes:

[0022] Generate a summary table of pile numbers, impact sound decibel values ​​and surrounding rock grade lines based on the comparison table of surrounding rock grade and impact decibel values ​​and the statistical table of surrounding rock impact sound decibel values;

[0023] The surrounding rock is graded according to the pile number, decibel value of impact sound and surrounding rock grade line summary table.

[0024] Furthermore, the surrounding rock is graded according to the pile number, the decibel value of the impact sound and the surrounding rock grade line summary table; including:

[0025] Generate a two-dimensional line graph of pile number-impact sound decibel value and surrounding rock level line according to the pile number, impact sound decibel value and surrounding rock level line summary table;

[0026] The surrounding rock is graded according to the pile number-impact sound decibel value and the two-dimensional line graph of the surrounding rock grade line.

[0027] Furthermore, the surrounding rock is graded according to the pile number-impact sound decibel value and the surrounding rock grade line two-dimensional line graph; including:

[0028] According to the pile number-impact sound decibel value and each surrounding rock grade line in the two-dimensional line graph of surrounding rock grade line, surrounding rock segmentation is completed, and a surrounding rock grade table based on impact sound is generated;

[0029] The surrounding rock classification is performed according to the surrounding rock classification table based on impact sound.

[0030] Further, the surrounding rock is segmented according to the pile number-impact sound decibel value and each surrounding rock grade line in the two-dimensional line graph of surrounding rock grade lines, and a surrounding rock grade table based on impact sound is generated; and further comprising:

[0031] When it is judged that the cave is not conducive to the stability of the surrounding rock based on geological sketches and records and geological prior knowledge, each surrounding rock grade in the surrounding rock classification table based on impact sound is downgraded; the downgrade refers to the reduction of a higher level of surrounding rock grade to a lower level of surrounding rock grade.

[0032] Furthermore, the calculation formula for the average impact sound decibel value is:

[0033]

[0034] Where: n is the number of pile numbers in the surrounding rock impact sound decibel value statistical table corresponding to the surrounding rock engineering geological segment summary, x i is the decibel value of impact sound corresponding to each pile number in the statistical table of decibel values ​​of surrounding rock impact sound, and i is the number of surrounding rock engineering geological sections at the same preliminary classification level of surrounding rock.

[0035] In a second aspect, an embodiment of the present invention provides a surrounding rock classification system, including:

[0036] A pile number acquisition unit is used to acquire a number of pile numbers set at equal intervals on one side of the cave wall of the rock cave;

[0037] A surrounding rock preliminary classification table generating unit is used to divide the surrounding rock engineering geological sections of the cave, conduct preliminary surrounding rock classification for each of the surrounding rock engineering geological sections, and generate a surrounding rock preliminary classification table;

[0038] A surrounding rock impact sound decibel value statistical table generating unit is used to control the rock impact sound decibel value detecting instrument to detect the surrounding rock impact sound decibel value of each part at equal intervals along one side of the rock cave, and generate a surrounding rock impact sound decibel value statistical table based on the pile number and the surrounding rock impact sound decibel value of each part;

[0039] A preliminary level segmentation statistics table generating unit is used to summarize the surrounding rock engineering geological segments belonging to the same surrounding rock preliminary classification level in the surrounding rock preliminary classification table to generate a surrounding rock preliminary level segmentation statistics table;

[0040] A surrounding rock preliminary grade and average impact sound decibel value statistical table generating unit is used to calculate the average impact sound decibel value of the same surrounding rock preliminary classification level using the surrounding rock preliminary grade segment statistical table and the surrounding rock impact sound decibel value statistical table to obtain the surrounding rock preliminary grade and average impact sound decibel value statistical table; and

[0041] The surrounding rock classification unit is used to classify the surrounding rock according to the statistical table of the preliminary grade of the surrounding rock and the average decibel value of the impact sound.

[0042] Furthermore, the surrounding rock classification unit is also used for:

[0043] Remove the average impact sound decibel value corresponding to the highest surrounding rock preliminary level in the statistical table of surrounding rock preliminary levels and average impact sound decibel values;

[0044] The average decibel value of the impact sound of all the surrounding rock preliminary levels is assigned as follows:

[0045] According to the order of the surrounding rock preliminary levels, the average percussion sound decibel value corresponding to the previous level of the surrounding rock preliminary level is assigned to the next level of the surrounding rock preliminary level until the assignment of the average percussion sound decibel values ​​of all the surrounding rock preliminary levels is completed, and a statistical table of the assigned surrounding rock preliminary levels and the average percussion sound decibel values ​​is obtained;

[0046] The surrounding rock is graded according to the assigned preliminary grade of the surrounding rock and the statistical table of average decibel value of impact sound.

[0047] Compared with the prior art, the embodiments of the present invention have the following advantages and beneficial effects:

[0048] A surrounding rock classification method and system according to an embodiment of the present invention are provided by setting a number of pile numbers at equal intervals on one side of a cave wall; performing surrounding rock engineering geological segmentation on the cave, carrying out preliminary surrounding rock classification on each of the surrounding rock engineering geological segments, and generating a preliminary surrounding rock classification table; controlling a rock impact sound decibel value detection instrument to detect the surrounding rock impact sound decibel value of each part at equal intervals along one side of the cave, and generating a surrounding rock impact sound decibel value statistical table based on the pile numbers and the surrounding rock impact sound decibel value of each part; summarizing the surrounding rock engineering geological segments belonging to the same surrounding rock preliminary classification level in the surrounding rock preliminary classification table, and generating a surrounding rock preliminary level segmentation statistical table; using the surrounding rock preliminary level segmentation statistical table and the surrounding rock impact sound decibel value statistical table, calculating the average impact sound decibel value of the same surrounding rock preliminary classification level, and obtaining a surrounding rock preliminary level and average impact sound decibel value statistical table; performing surrounding rock classification according to the surrounding rock preliminary level and average impact sound decibel value statistical table solves the technical problem that the existing surrounding rock classification method requires on-site rock sampling and then transporting it back to the laboratory for classification, resulting in the existing surrounding rock classification method being greatly limited and unable to carry out universal tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0050] Figure 1 This is a flow chart of the surrounding rock classification method.

[0051] Figure 2 This is a structural diagram of the surrounding rock classification system.

[0052] Figure 3 It is a two-dimensional line graph of pile number-impact sound decibel value and surrounding rock grade line.

[0053] Among them, 1-surrounding rock grade line (4), 2-surrounding rock grade line (3), 3-surrounding rock grade line (2), 4-surrounding rock grade line (1), 5-impact sound decibel value, 6-pile number. DETAILED DESCRIPTION

[0054] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0055] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is apparent to one of ordinary skill in the art that these specific details are not necessarily employed to practice the present invention. In other embodiments, in order to avoid obscuring the present invention, well-known structures, circuits, materials, or methods are not specifically described.

[0056] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment," "an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. In addition, it will be appreciated by those of ordinary skill in the art that the figures provided herein are for illustrative purposes and that the figures are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0057] In the description of the present invention, the directions or positional relationships indicated by terms such as “front”, “rear”, “left”, “right”, “up”, “down”, “vertical”, “horizontal”, “high”, “low”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present invention.

[0058] Example

[0059] In order to solve the technical problem that the existing surrounding rock classification method requires on-site rock sampling and then transported back to the laboratory for classification, which leads to great limitations in the existing surrounding rock classification method and cannot carry out universal tests, the inventors have studied that the sound intensities generated by surrounding rocks of different strengths under the same external force are different. Therefore, the present invention provides a method for surrounding rock classification through rock impact sound.

[0060] In a first aspect, an embodiment of the present invention provides a surrounding rock classification method, referring to Figure 1 As shown, including:

[0061] S1. Set a number of piles at equal intervals on one side of the cave wall;

[0062] S2. Divide the surrounding rock engineering geological sections of the cave, conduct preliminary classification of the surrounding rock for each of the surrounding rock engineering geological sections, and generate a preliminary classification table of surrounding rock;

[0063] S3. Control the rock impact sound decibel value detection instrument to detect the rock impact sound decibel value of each part at equal intervals along one side of the cave, and generate a statistical table of the rock impact sound decibel value based on the pile number and the rock impact sound decibel value of each part;

[0064] S4. Summarize the surrounding rock engineering geological sections belonging to the same surrounding rock preliminary classification level in the surrounding rock preliminary classification table to generate a surrounding rock preliminary level segmentation statistics table;

[0065] S5. Using the statistics table of the preliminary grade of surrounding rock and the statistics table of the decibel value of the impact sound of the surrounding rock, the average decibel value of the impact sound of the same preliminary grade of surrounding rock is calculated to obtain the statistics table of the preliminary grade of surrounding rock and the average decibel value of the impact sound;

[0066] S6. Classify the surrounding rock based on the statistical table of preliminary surrounding rock grades and average impact sound decibel values.

[0067] The embodiment of the present invention sets a number of pile numbers at equal intervals on one side of the cave wall; divides the cave into engineering geological sections for surrounding rocks, performs preliminary surrounding rock classification on each of the surrounding rock engineering geological sections, and generates a preliminary surrounding rock classification table; controls a rock impact sound decibel value detection instrument to detect the surrounding rock impact sound decibel value of each part at equal intervals along one side of the cave, and generates a surrounding rock impact sound decibel value statistical table based on the pile numbers and the surrounding rock impact sound decibel value of each part; summarizes the surrounding rock engineering geological sections belonging to the same surrounding rock preliminary classification level in the surrounding rock preliminary classification table, and generates a surrounding rock preliminary level segmentation statistical table; uses the surrounding rock preliminary level segmentation statistical table and the surrounding rock impact sound decibel value statistical table to calculate the average impact sound decibel value of the same surrounding rock preliminary classification level, and obtains a surrounding rock preliminary level and average impact sound decibel value statistical table; and performs surrounding rock classification according to the surrounding rock preliminary level and average impact sound decibel value statistical table, thereby solving the technical problem that the existing surrounding rock classification method requires on-site rock sampling and then transporting it back to the laboratory for classification, resulting in the existing surrounding rock classification method being greatly limited and unable to carry out universal tests.

[0068] Furthermore, the surrounding rock classification is carried out according to the statistical table of the preliminary grade of the surrounding rock and the average decibel value of the impact sound; including:

[0069] S61. Remove the average impact sound decibel value corresponding to the highest surrounding rock preliminary level in the statistical table of surrounding rock preliminary levels and average impact sound decibel values;

[0070] S62. Assign the average decibel value of the impact sound of all the surrounding rock preliminary levels as follows:

[0071] S63. Assign the average percussion sound decibel value corresponding to the previous level of the surrounding rock preliminary level to the next level of the surrounding rock preliminary level in order of the height of the surrounding rock preliminary level, until the assignment of the average percussion sound decibel values ​​of all the surrounding rock preliminary levels is completed, and obtain a statistical table of the assigned surrounding rock preliminary levels and the average percussion sound decibel values;

[0072] S64. Classify the surrounding rock based on the assigned preliminary grade of the surrounding rock and the statistical table of average decibel values ​​of impact sound.

[0073] Further, S64. Classify the surrounding rock according to the assigned preliminary grade of the surrounding rock and the statistical table of average decibel value of impact sound; including:

[0074] S641. The maximum and minimum values ​​of the average impact sound decibel value in the statistical table of the assigned surrounding rock preliminary level and the average impact sound decibel value are limited according to the corresponding surrounding rock preliminary level to obtain a surrounding rock level and impact decibel value comparison table;

[0075] S642. Classify surrounding rock based on the comparison table between surrounding rock grade and impact decibel value.

[0076] Further, S642. Classifying surrounding rocks according to the comparison table of surrounding rock grades and impact decibel values; also includes:

[0077] S6421. Generate a summary table of pile numbers, impact sound decibel values ​​and surrounding rock grade lines based on the surrounding rock grade and impact decibel value comparison table and the surrounding rock impact sound decibel value statistical table;

[0078] S6422. Classify the surrounding rock based on the pile number, decibel value of the impact sound and the surrounding rock grade line summary table.

[0079] Further, S6422. Perform surrounding rock classification according to the pile number, impact sound decibel value and surrounding rock grade line summary table; including:

[0080] S64221. Generate a two-dimensional line graph of pile number-impact sound decibel value and surrounding rock level line according to the pile number, impact sound decibel value and surrounding rock level line summary table;

[0081] S64222. Classify the surrounding rock based on the pile number-impact sound decibel value and the two-dimensional line graph of the surrounding rock grade line.

[0082] Further, S64222. Perform surrounding rock classification according to the pile number-impact sound decibel value and surrounding rock grade line two-dimensional line graph; including:

[0083] S642221. Complete surrounding rock segmentation according to the pile number-impact sound decibel value and each surrounding rock level line in the two-dimensional line graph of surrounding rock level lines, and generate a surrounding rock classification table based on impact sound;

[0084] S642222. Classify the surrounding rock according to the surrounding rock classification table based on impact sound.

[0085] Further, S642221. The surrounding rock is segmented according to the pile number-impact sound decibel value and each surrounding rock level line in the two-dimensional line graph of the surrounding rock level line, and a surrounding rock classification table based on the impact sound is generated; it also includes:

[0086] S6422211. When it is judged that the cave is not conducive to the stability of the surrounding rock based on geological sketches and records and geological prior knowledge, each surrounding rock grade in the surrounding rock classification table based on impact sound is downgraded; the downgrade refers to the reduction of a higher level of surrounding rock grade to a lower level of surrounding rock grade.

[0087] Furthermore, the calculation formula for the average impact sound decibel value is:

[0088]

[0089] Where: n is the number of pile numbers in the surrounding rock impact sound decibel value statistical table corresponding to the surrounding rock engineering geological segment summary, x iis the decibel value of impact sound corresponding to each pile number in the statistical table of decibel values ​​of surrounding rock impact sound, and i is the number of surrounding rock engineering geological sections at the same preliminary classification level of surrounding rock.

[0090] Exemplarily, the surrounding rock classification method is to classify the surrounding rock by the decibel value of rock impact sound, and comprises the following steps:

[0091] A. Paint the pile number on the cave wall on one side of the tunnel / tunnel.

[0092] Specifically, the pile number spacing is selected according to the accuracy of on-site detection, and the general pile number spacing is 1m.

[0093] B. Carry out on-site geological survey and cataloging work.

[0094] Specifically, the on-site geological survey and cataloging includes drawing cataloging sketches, recording information such as structural surface elements, and conducting macroscopic engineering geological segmentation of surrounding rock based on geological experience, and then conducting preliminary classification of surrounding rock in each segment. Specifically, the surrounding rock of each segment is preliminarily divided into grades I, II, III, IV, and V, and the starting and ending pile numbers of the surrounding rock of each segment are recorded to generate a preliminary classification table for surrounding rock, as shown in Table 1.

[0095] Table 1 Preliminary classification of surrounding rock

[0096] Surrounding rock engineering geological segmentation (m) Preliminary level of surrounding rock 0～4.5 Ⅴ 4.5～12.0 Ⅳ 12.0～12.5 Ⅲ 12.5～17.6 Ⅳ 17.6～25.3 Ⅱ 25.3～27.2 Ⅳ 27.2～35.8 Ⅱ … …

[0097] C. Select a suitable instrument for detecting the decibel value of rock impact sound.

[0098] Specifically, the rock impact sound decibel value detection instrument in step C refers to an instrument that can record the maximum impact sound decibel value generated at the moment of impact by impacting the rock through the instrument. Furthermore, the kinetic energy of the instrument hitting the rock each time is the same.

[0099] D. Use rock impact sound decibel value detection instrument to carry out on-site surrounding rock impact sound decibel value detection work.

[0100] Specifically, the detection work in step D is to detect the decibel value of the surrounding rock impact sound at each part along the cave wall at a height of 1.5m from the cave bottom at a spacing of 10cm. During the operation, the instrument should be kept close to the rock wall, and the data should be recorded after each detection. Furthermore, the number of times the surrounding rock of each part is detected is 3 times, and the average value of the 3 tests is calculated to obtain the decibel value of the surrounding rock impact sound of each part.

[0101] E. Arrange the decibel value data of surrounding rock impact sound at each part according to the pile number to obtain a statistical table of decibel values ​​of surrounding rock impact sound, as shown in Table 2.

[0102] Table 2 Statistics of decibel values ​​of surrounding rock impact sound

[0103] Pile No.(m) Impact sound decibel value 0 45 0.1 42 0.2 48 0.3 53 0.4 54 0.5 62 0.6 58 0.7 60 0.8 61 0.9 54 1.0 79 … …

[0104] F. Arrange the preliminary surrounding rock classification table in Table 1 obtained in the above step B, and count the engineering geological segmentation ranges of each level of surrounding rock according to the preliminary level of surrounding rock, to obtain the preliminary level segmentation statistics table of surrounding rock in Table 3.

[0105] Table 3 Preliminary classification statistics of surrounding rock

[0106]

[0107] G According to the surrounding rock engineering geological segment summary column in Table 3 surrounding rock preliminary level segment statistics obtained in step F, look up Table 2 surrounding rock impact sound decibel value statistics table, calculate the average impact sound decibel value of each surrounding rock preliminary level, and obtain the surrounding rock preliminary level and average impact sound decibel value statistics table, see Table 4. Specifically, the above calculation formula is: Where: n is the number of pile numbers in Table 2 corresponding to the summary of surrounding rock engineering geology in Table 3, x i It is the decibel value of the impact sound corresponding to each pile number in Table 2.

[0108] Table 4 Statistics of the preliminary level of surrounding rock and average decibel value of impact sound

[0109]

[0110] Based on Table 4 obtained in step F, a system for classifying surrounding rocks by the decibel value of rock impact sound is established.

[0111] Specifically, the method for establishing the system in step H is that, because the preliminary grades of the surrounding rocks in Table 4 correspond to the average impact sound decibel value, and there is a maximum value above the average value, therefore, in order to ensure the reasonable division of the grading system and reduce misjudgment, the grading system is established by downgrading the average impact sound decibel value in Table 4, removing the average impact sound decibel value corresponding to Class V, and then successively reducing the average impact sound decibel value corresponding to Class IV, III, II, and I by one level to become the upper limit value of the impact sound decibel of Class V, IV, III, and II, and obtaining the table of preliminary grades of surrounding rocks and upper limit values ​​of impact sound decibel in Table 5.

[0112] Table 5 Preliminary level of surrounding rock and upper limit of decibel of impact sound

[0113]

[0114] Furthermore, on the basis of Table 5, the minimum and maximum impact sound decibel values ​​are further defined for each type of surrounding rock, and a comparison table of surrounding rock grade and impact decibel value is obtained (Table 6), thus completing the surrounding rock classification system based on rock impact sound decibel value.

[0115] Table 6 Surrounding rock grade and impact sound decibel value

[0116]

[0117] IAccording to Table 2 and Table 6, a summary table of pile number, impact sound decibel value and surrounding rock grade line is established, see Table 7.

[0118] Table 7 Summary of pile numbers, decibel values ​​of impact sound, and surrounding rock grade lines

[0119]

[0120] Furthermore, a two-dimensional line graph of pile number-impact sound decibel value and surrounding rock grade line is drawn according to Table 7 (see Figure 3 ).

[0121] The six broken lines are surrounding rock level line (4) 1, surrounding rock level line (3) 2, surrounding rock level line (2) 3, surrounding rock level line (1) 4, impact sound decibel value 5 and pile number 6.

[0122] Further, according to Figure 1 The surrounding rock classification work is completed, specifically, the surrounding rock is segmented according to each surrounding rock grade line, and the surrounding rock classification table based on impact sound is obtained in Table 8.

[0123] Table 8 Surrounding rock classification based on impact sound

[0124] Surrounding rock segmentation (m) Surrounding rock level 0～3.5 Ⅴ 3.5～10.6 Ⅳ 10.6～15.6 Ⅲ 15.6～17.6 Ⅳ 17.6～26.4 Ⅱ 26.4～32.5 Ⅳ 32.5～39.7 Ⅱ … …

[0125] J Better, for special surrounding rock tunnel sections, the surrounding rock segmentation results based on impact sound should be manually corrected, and the corresponding surrounding rock grade should be downgraded according to geological sketches and records and geological experience.

[0126] Specifically, the special surrounding rock cave section in step J refers to the area with abundant groundwater, extremely developed and dense rock joints and fissures, exposed faults, etc., which are unfavorable to the stability of the surrounding rock. The surrounding rock nearby should be downgraded.

[0127] In a second aspect, an embodiment of the present invention provides a surrounding rock classification system, referring to Figure 2 As shown, including:

[0128] A pile number acquisition unit is used to acquire a number of pile numbers set at equal intervals on one side of the cave wall of the rock cave;

[0129] A surrounding rock preliminary classification table generating unit is used to divide the surrounding rock engineering geological sections of the cave, conduct preliminary surrounding rock classification for each of the surrounding rock engineering geological sections, and generate a surrounding rock preliminary classification table;

[0130] A surrounding rock impact sound decibel value statistical table generating unit is used to control the rock impact sound decibel value detecting instrument to detect the surrounding rock impact sound decibel value of each part at equal intervals along one side of the rock cave, and generate a surrounding rock impact sound decibel value statistical table based on the pile number and the surrounding rock impact sound decibel value of each part;

[0131] A preliminary level segmentation statistics table generating unit is used to summarize the surrounding rock engineering geological segments belonging to the same surrounding rock preliminary classification level in the surrounding rock preliminary classification table to generate a surrounding rock preliminary level segmentation statistics table;

[0132] A surrounding rock preliminary grade and average impact sound decibel value statistical table generating unit is used to calculate the average impact sound decibel value of the same surrounding rock preliminary classification level using the surrounding rock preliminary grade segment statistical table and the surrounding rock impact sound decibel value statistical table to obtain the surrounding rock preliminary grade and average impact sound decibel value statistical table; and

[0133] The surrounding rock classification unit is used to classify the surrounding rock according to the statistical table of the preliminary grade of the surrounding rock and the average decibel value of the impact sound.

[0134] Furthermore, the surrounding rock classification unit is also used for:

[0135] Remove the average impact sound decibel value corresponding to the highest surrounding rock preliminary level in the statistical table of surrounding rock preliminary levels and average impact sound decibel values;

[0136] The average decibel value of the impact sound of all the surrounding rock preliminary levels is assigned as follows:

[0137] According to the order of the surrounding rock preliminary levels, the average percussion sound decibel value corresponding to the previous level of the surrounding rock preliminary level is assigned to the next level of the surrounding rock preliminary level until the assignment of the average percussion sound decibel values ​​of all the surrounding rock preliminary levels is completed, and a statistical table of the assigned surrounding rock preliminary levels and the average percussion sound decibel values ​​is obtained;

[0138] The surrounding rock is graded according to the assigned preliminary grade of the surrounding rock and the statistical table of average decibel value of impact sound.

[0139] Therefore, the embodiment of the present invention uses the decibel value of rock impact sound to carry out surrounding rock classification. The obtained decibel value of impact sound is quantitative data. Different values ​​reflect different strengths of rocks. Large values ​​represent high strength. Therefore, it better reflects the actual situation of rock strength. By establishing a classification system through the decibel value of impact sound, the exploration cost can be significantly reduced, the efficiency of exploration work can be improved, and the use of quantitative data classification can reduce the error of empirical judgment under the participation of human factors, thereby improving the accuracy of surrounding rock classification.

[0140] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A surrounding rock classification method, characterized in that: include: Several stakes are set at equal intervals on one side of the cave wall; Divide the surrounding rock engineering geological sections of the cave, conduct preliminary classification of the surrounding rock for each of the surrounding rock engineering geological sections, and generate a preliminary classification table of surrounding rock; Control the rock impact sound decibel value detection instrument to detect the surrounding rock impact sound decibel value at equal intervals along one side of the cave, and generate a surrounding rock impact sound decibel value statistical table based on the pile number and the surrounding rock impact sound decibel value of each part; Summarize the surrounding rock engineering geological sections belonging to the same surrounding rock preliminary classification level in the surrounding rock preliminary classification table to generate a surrounding rock preliminary level section statistics table; Using the surrounding rock preliminary grade segmentation statistics table and the surrounding rock impact sound decibel value statistics table, calculate the average impact sound decibel value of the same surrounding rock preliminary classification level, and obtain the surrounding rock preliminary grade and average impact sound decibel value statistics table; The surrounding rock is graded according to the statistical table of the preliminary grade of the surrounding rock and the average decibel value of the impact sound; The surrounding rock is graded according to the statistical table of the preliminary grade of the surrounding rock and the average decibel value of the impact sound; including: Remove the average impact sound decibel value corresponding to the highest surrounding rock preliminary level in the statistical table of surrounding rock preliminary levels and average impact sound decibel values; The average decibel value of the impact sound of all the surrounding rock preliminary levels is assigned as follows: According to the order of the surrounding rock preliminary levels, the average percussion sound decibel value corresponding to the previous level of the surrounding rock preliminary level is assigned to the next level of the surrounding rock preliminary level until the assignment of the average percussion sound decibel values ​​of all the surrounding rock preliminary levels is completed, and a statistical table of the assigned surrounding rock preliminary levels and the average percussion sound decibel values ​​is obtained; The surrounding rock is graded according to the assigned preliminary grade of the surrounding rock and the statistical table of average decibel value of impact sound.

2. The surrounding rock classification method according to claim 1, characterized in that: The surrounding rock classification is carried out according to the assigned preliminary grade of the surrounding rock and the statistical table of average decibel value of impact sound; including: The maximum and minimum values ​​of the average impact sound decibel value in the statistical table of the assigned surrounding rock preliminary level and the average impact sound decibel value are limited according to the corresponding surrounding rock preliminary level, so as to obtain a comparison table of surrounding rock level and impact decibel value; The surrounding rock is graded according to the comparison table of surrounding rock grade and impact decibel value.

3. The surrounding rock classification method according to claim 2, characterized in that: Surrounding rock classification is carried out according to the comparison table of surrounding rock grade and impact decibel value; it also includes: Generate a summary table of pile numbers, impact sound decibel values ​​and surrounding rock grade lines based on the comparison table of surrounding rock grade and impact decibel values ​​and the statistical table of surrounding rock impact sound decibel values; The surrounding rock is graded according to the pile number, decibel value of impact sound and surrounding rock grade line summary table.

4. The surrounding rock classification method according to claim 3, characterized in that: The surrounding rock is graded according to the pile number, the decibel value of the impact sound and the surrounding rock grade line summary table; including: Generate a two-dimensional line graph of pile number-impact sound decibel value and surrounding rock level line according to the pile number, impact sound decibel value and surrounding rock level line summary table; The surrounding rock is graded according to the pile number-impact sound decibel value and the two-dimensional line graph of the surrounding rock grade line.

5. The surrounding rock classification method according to claim 4, characterized in that: The surrounding rock is graded according to the pile number-impact sound decibel value and the surrounding rock grade line two-dimensional line graph; including: According to the pile number-impact sound decibel value and each surrounding rock grade line in the two-dimensional line graph of surrounding rock grade line, surrounding rock segmentation is completed, and a surrounding rock grade table based on impact sound is generated; The surrounding rock classification is performed according to the surrounding rock classification table based on impact sound.

6. The surrounding rock classification method according to claim 5, characterized in that: The surrounding rock is segmented according to the pile number-impact sound decibel value and each surrounding rock grade line in the two-dimensional line graph of surrounding rock grade line, and a surrounding rock grade table based on impact sound is generated; further comprising: When it is judged that the cave is not conducive to the stability of the surrounding rock based on geological sketches and records and geological prior knowledge, each surrounding rock grade in the surrounding rock classification table based on impact sound is downgraded; the downgrade refers to the reduction of a higher level of surrounding rock grade to a lower level of surrounding rock grade.

7. The surrounding rock classification method according to claim 1, characterized in that: The calculation formula for the average impact sound decibel value is: Where: n is the number of pile numbers in the surrounding rock impact sound decibel value statistical table corresponding to the surrounding rock engineering geological segment summary, x i is the decibel value of impact sound corresponding to each pile number in the statistical table of decibel values ​​of surrounding rock impact sound, and i is the number of surrounding rock engineering geological sections at the same preliminary classification level of surrounding rock.

8. A surrounding rock classification system, characterized in that: include: A pile number acquisition unit is used to acquire a number of pile numbers set at equal intervals on one side of the cave wall of the rock cave; A surrounding rock preliminary classification table generating unit is used to divide the surrounding rock engineering geological sections of the cave, conduct preliminary surrounding rock classification for each of the surrounding rock engineering geological sections, and generate a surrounding rock preliminary classification table; A surrounding rock impact sound decibel value statistical table generating unit is used to control the rock impact sound decibel value detecting instrument to detect the surrounding rock impact sound decibel value of each part at equal intervals along one side of the rock cave, and generate a surrounding rock impact sound decibel value statistical table based on the pile number and the surrounding rock impact sound decibel value of each part; A preliminary level segmentation statistics table generating unit is used to summarize the surrounding rock engineering geological segments belonging to the same surrounding rock preliminary classification level in the surrounding rock preliminary classification table to generate a surrounding rock preliminary level segmentation statistics table; A surrounding rock preliminary grade and average impact sound decibel value statistical table generating unit is used to calculate the average impact sound decibel value of the same surrounding rock preliminary classification level using the surrounding rock preliminary grade segment statistical table and the surrounding rock impact sound decibel value statistical table to obtain the surrounding rock preliminary grade and average impact sound decibel value statistical table; and The surrounding rock classification unit is used to classify the surrounding rock according to the statistical table of the preliminary grade of the surrounding rock and the average decibel value of the impact sound; The surrounding rock classification unit is also used for: Remove the average impact sound decibel value corresponding to the highest surrounding rock preliminary level in the statistical table of surrounding rock preliminary levels and average impact sound decibel values; The average decibel value of the impact sound of all the surrounding rock preliminary levels is assigned as follows: According to the order of the surrounding rock preliminary levels, the average percussion sound decibel value corresponding to the previous level of the surrounding rock preliminary level is assigned to the next level of the surrounding rock preliminary level until the assignment of the average percussion sound decibel values ​​of all the surrounding rock preliminary levels is completed, and a statistical table of the assigned surrounding rock preliminary levels and the average percussion sound decibel values ​​is obtained; The surrounding rock is graded according to the assigned preliminary grade of the surrounding rock and the statistical table of average decibel value of impact sound.

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