A method for evaluating the dissolution potential of a red-bed gypsum rock mass

Abstract

The present application belongs to the technical field of red-bed gypsum karst corrosion, and discloses a red-bed gypsum rock mass corrosion potential evaluation method. In order to solve the problem that indoor simulation cannot truly reflect the gypsum karst corrosion, the present application provides a red-bed gypsum rock mass corrosion potential evaluation method. The method comprises the following steps: establishing a corrosion potential evaluation system according to different red-bed gypsum rock masses; testing index data corresponding to each index of the red-bed gypsum rock mass according to each index in the corrosion potential evaluation system; calculating a comprehensive corrosion potential index Z according to the index data of the red-bed gypsum rock mass, and obtaining the corrosion potential of the red-bed gypsum rock mass according to the score of the calculated comprehensive corrosion potential index Z. The present application establishes a scientific evaluation system for the corrosion potential of the red-bed gypsum rock mass, thereby evaluating the corrosion potential of various red-bed gypsum rock masses according to the evaluation system, filling the gap of the corrosion potential evaluation of the red-bed gypsum rock mass, and providing a scientific evaluation system for the corrosion of the red-bed gypsum rock mass.

Description

Technical Field

[0001] This invention belongs to the field of red gypsum rock karstification technology, specifically relating to a method for evaluating the karstification potential of red gypsum rock masses. Background Technology

[0002] Red beds refer to lacustrine and fluvial terrestrial clastic rock strata deposited since the Mesozoic Era. The lithology is mainly conglomerate, sandstone, siltstone, and mudstone. Some red beds (such as the Upper Cretaceous Guankou Formation) contain gypsum, glaucophane, and other moderately soluble salts. In addition to gypsum, red bed gypsum rocks also contain other minerals such as dolomite, calcite, hematite, kaolinite, chlorite, and quartz. Therefore, red bed gypsum rocks are not the same as the gypsum rocks commonly discussed in engineering. Furthermore, the mineral composition of red bed gypsum rocks varies considerably from region to region.

[0003] Due to its compositional characteristics, red bed gypsum rock can easily cause major engineering hazards such as ground collapse, ground subsidence, dam foundation leakage, and concrete corrosion after dissolution. However, because red bed gypsum rock has a small distribution area and is mostly hidden on the surface, the current research on the dissolution of red bed gypsum rock is less extensive than the research on the dissolution of gypsum rock frequently discussed in engineering.

[0004] Current research on the dissolution of red-bed gypsum rocks mainly analyzes and evaluates the development patterns and mechanisms of gypsum rocks from a macroscopic perspective, such as the geological background and hydrogeological characteristics of the gypsum rock development area, and evaluates the current engineering geological properties of gypsum rocks by combining indoor physical and mechanical tests of rock blocks. However, there is very little research on the evaluation (assessment) of the dissolution potential of red-bed gypsum rock masses.

[0005] Therefore, there is an urgent need for a scientific method to evaluate the dissolution potential of red gypsum rock masses, so as to understand the dissolution status of red gypsum rock masses and thus evaluate the safety impact of red gypsum rock on buildings. Summary of the Invention

[0006] To address the lack of existing methods for evaluating the dissolution potential of red gypsum rock masses, this invention provides a method for assessing the dissolution potential of red gypsum rock masses. This method can scientifically evaluate the dissolution status of red gypsum rock masses and assess the impact on the safety of buildings based on the evaluation results.

[0007] To solve the technical problem, the technical solution adopted by this invention is as follows:

[0008] A method for evaluating the dissolution potential of red gypsum rock masses, characterized by comprising:

[0009] (1) Establish a dissolution potential evaluation system based on different red gypsum rock masses;

[0010] (2) Based on the various indicators in the dissolution potential evaluation system, test the corresponding index data of each indicator of the red gypsum rock mass.

[0011] (3) Based on the index data of the tested red gypsum rock mass and calculate the comprehensive dissolution potential index Z, the dissolution potential of the red gypsum rock mass (i.e., whether the red gypsum rock mass is easily soluble, moderately soluble, or difficult to soluble) is obtained based on the score of the calculated comprehensive dissolution potential index Z.

[0012] In some embodiments, the comprehensive dissolution potential index Z is calculated using the following formula: Z = A·w A +B·w B +C·w c ;in,

[0013] w A =m △ / T △ ;

[0014] w B =R △ / T △ ;

[0015] w C =v △ / T △ ;

[0016] m △ R represents the average mass loss rate after dynamic water dissolution tests on red gypsum rock masses. △为 The average rock mass strength loss rate after dynamic water dissolution test of red gypsum rock mass, v △ The average wave velocity loss rate after dynamic water dissolution test of the red gypsum rock mass; the total loss rate T △ =m △ +R △ +v △ .

[0017] In some embodiments, the establishment of the dissolution potential evaluation system for the red gypsum rock mass includes:

[0018] (1) According to the dissolution of the rock mass, it is divided into three levels: easy to dissolve, moderately dissolve, and difficult to dissolve.

[0019] (2) The three levels are divided into three segments according to a 10-point system. The segment value for easy corrosion in the three levels is 10-7 points, the segment value for moderate corrosion in the three levels is 7-4 points, and the segment value for difficult corrosion in the three levels is 4-0 points.

[0020] (3) Test the gypsum content A (percentage %) of different red gypsum rock bodies. The gypsum content A ranges from 0 to 100%. The range of gypsum content A in red gypsum rock bodies is 50-100% and is classified as easily soluble (corresponding to a score of 10-7). The range of gypsum content A in red gypsum rock bodies is 20-50% and is classified as moderately soluble (corresponding to a score of 7-4). The range of gypsum content A in red gypsum rock bodies is 0-20% and is classified as difficult to dissolve (corresponding to a score of 0-4).

[0021] (4) Test the rock mass strength B (MPa) of different red gypsum rock masses. Rock mass strength B values ​​of 0-15 (MPa) are classified as easily soluble, rock mass strength B values ​​of 15.0-30.0 (MPa) are classified as moderately soluble, and rock mass strength B values ​​greater than or equal to 30.0 are classified as difficult to dissolve.

[0022] (5) Test the permeability coefficient C (cm / s) of different red gypsum rock masses. The value of permeability coefficient C is greater than or equal to ≥10. -2 Classified as easily soluble, with a permeability coefficient C value of 10. -4 —10 -2 The area between these is classified as medium dissolution, with a permeability coefficient less than or equal to 10. -4 It is classified as difficult to dissolve.

[0023] (6) Dynamic water dissolution tests were conducted on different red gypsum rock masses. The comprehensive dissolution potential index Z was obtained based on the dynamic water dissolution test structure. When the comprehensive dissolution potential index Z was 0-4, it was classified as difficult to dissolve; when the comprehensive dissolution potential index Z was 4-7, it was classified as moderately dissolved; and when the comprehensive dissolution potential index Z was 7-10, it was classified as easily dissolved.

[0024] Where Z = A·w A +B·w B +C·w c ;

[0025] w A =m △ / T △ ;

[0026] w B =R △ / T △ ;

[0027] w C =v △ / T △ ;

[0028] m △ R represents the average mass loss rate after dynamic water dissolution tests on red gypsum rock masses. △为The average rock mass strength loss rate after dynamic water dissolution test of red gypsum rock mass, v △ The average wave velocity loss rate after dynamic water dissolution test of the red gypsum rock mass; the total loss rate T △ =m △ +R △ +v △ .

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] This invention provides a method for evaluating the dissolution potential of red gypsum rock masses, establishing a scientific evaluation system for this potential. This system allows for the evaluation of the dissolution potential of various red gypsum rock masses, filling a gap in the evaluation of red gypsum rock mass dissolution potential and providing a scientific evaluation system for its erosion. It overcomes the limitations of existing techniques that rely solely on macroscopic analysis of gypsum rock development patterns and mechanisms, combined with indoor physical and mechanical tests of rock blocks, to assess the dissolution status of red gypsum rock masses.

[0031] Furthermore, the erosion potential evaluation system established in this invention can more accurately obtain the erosion potential of red gypsum rock masses compared with the existing dynamic water erosion test. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the engineering geological profile described in Embodiment 1 of the present invention;

[0033] Figure 2 This is a schematic diagram of the red gypsum rock core structure described in Embodiment 1 of the present invention;

[0034] Figure 3 This is a schematic diagram of the state of a red gypsum rock core sample before and after a dynamic water dissolution test in Embodiment 1 of the present invention. The upper image in the diagram shows the state before the dynamic water dissolution test, while the lower image shows the state after the dynamic water dissolution test.

[0035] Figure 4 This is a schematic diagram of the state of another red gypsum rock core sample before and after dynamic water dissolution test in Embodiment 1 of the present invention. In this schematic diagram, the upper picture shows the state before dynamic water dissolution test, while the lower picture shows the state after dynamic water dissolution test.

[0036] Figure 5 This is a schematic diagram of a structural embodiment of the present invention for conducting a dynamic water dissolution test;

[0037] The markings in the diagram are: 1. Constant temperature water tank, 2. Water stop valve, 3. Water pipe, 4. Reaction chamber, 5. Red gypsum rock core sample, 6. Permeable stone base, 7. Beaker. Detailed Implementation

[0038] The present invention will be further described below with reference to embodiments. These embodiments are merely some, not all, of the embodiments of the present invention. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the protection scope of the present invention.

[0039] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description; they do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly, for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0040] Referring to the accompanying drawings, the method for evaluating the dissolution potential of red gypsum rock masses according to the present invention includes:

[0041] (1) Establish a dissolution potential evaluation system based on different red gypsum rock masses;

[0042] (2) Based on the various indicators in the dissolution potential evaluation system, test the corresponding index data of each indicator of the red gypsum rock mass.

[0043] (3) Based on the index data of the tested red gypsum rock mass and calculate the comprehensive dissolution potential index, the dissolution potential of the red gypsum rock mass (i.e., whether the red gypsum rock mass is easily soluble, moderately soluble, or difficult to soluble) is obtained based on the score of the calculated comprehensive dissolution potential index.

[0044] In some embodiments, the establishment of the dissolution potential evaluation system for the red gypsum rock mass includes:

[0045] (1) The rock mass is classified into three levels according to its dissolution condition: easily soluble, moderately soluble, and difficult to soluble. This is consistent with the existing classification of dissolution conditions, thus preventing staff from confusing the rock mass with the existing dissolution classification. In other words, the classification of the red gypsum rock mass's dissolution condition is consistent with the existing rock mass dissolution classification.

[0046] (2) The three levels are divided into a segment based on a 10-point system. The segment value for easy corrosion in the three levels is 10-7 points, the segment value for moderate corrosion in the three levels is 7-4 points, and the segment value for difficult corrosion in the three levels is 4-0 points.

[0047] (3) The gypsum content A (percentage %) of different red gypsum rock bodies was tested. The value range of gypsum content A was 0-100%. The range of gypsum content A in red gypsum rock bodies was divided into easily soluble (corresponding to a score of 10-7) if the range of gypsum content A was 50-100%, moderately soluble (corresponding to a score of 7-4) if the range of gypsum content A was 20-50%, and difficult to dissolve (corresponding to a score of 0-4) if the range of gypsum content A was 0-20%. Among them, the gypsum in the red gypsum rock bodies is a moderately soluble salt, and the higher its content, the easier it is to dissolve.

[0048] In the specific implementation process, X-ray diffraction is used to identify the mineral composition and analyze the mineral content, thereby obtaining the mineral types and mineral contents of different red gypsum rock bodies, and then obtaining the gypsum content A of the red gypsum rock bodies.

[0049] (4) The rock mass strength B (MPa) of different red gypsum rock masses was tested. A rock mass strength B value of 0-15 (MPa) was classified as easily soluble, a rock mass strength B value of 15.0-30.0 (MPa) was classified as moderately soluble, and a rock mass strength B value greater than or equal to 30.0 was classified as difficult to soluble. Among them, the rock mass strength B can reflect the rock mass structure and degree of cementation. The higher the strength, the better the cementation between particles and the more difficult it is to erode.

[0050] In the specific implementation process, the rock mass strength B of the red gypsum rock mass can be obtained through uniaxial compression test.

[0051] (5) The permeability coefficient C (cm / s) of different red gypsum rock masses was tested. A permeability coefficient C value greater than or equal to 10⁻² was classified as easily soluble, a permeability coefficient C value between 10⁻⁴ and 10⁻² was classified as moderately soluble, and a permeability coefficient less than or equal to 10⁻⁴ was classified as difficult to dissolve. The permeability coefficient C represents the density and connectivity of groundwater dissolution channels. The more developed the rock mass fissures, the higher the permeability coefficient, and the easier it is for dissolution to occur. Wave velocity can reflect the integrity of the rock mass to a certain extent, thus indirectly reflecting the permeability characteristics. In the specific implementation process, the permeability and permeability coefficient C of the red gypsum rock mass can be obtained through pressure water tests.

[0052] (6) Dynamic water dissolution tests were conducted on different red gypsum rock masses. Based on the dynamic water dissolution test structure, the comprehensive dissolution potential index Z was obtained. When the comprehensive dissolution potential index Z was 0-4, it was classified as difficult to dissolve; when the comprehensive dissolution potential index Z was 4-7, it was classified as moderately dissolved; and when the comprehensive dissolution potential index Z was 7-10, it was classified as easily dissolved.

[0053] Where Z = A·w A +B·w B +C·w c ;

[0054] w A =m △ / T △ ;

[0055] w B =R △ / T △ ;

[0056] w C =v △ / T △ ;

[0057] m △ R represents the average mass loss rate after dynamic water dissolution tests on red gypsum rock masses. △为 The average rock mass strength loss rate after dynamic water dissolution test of red gypsum rock mass, v △ The average wave velocity loss rate after dynamic water dissolution test of the red gypsum rock mass; the total loss rate T △ =m △ +R △ +v △ .

[0058] Example 1

[0059] This project is located at a site in southern Chengdu. The strata belong to the Upper Cretaceous Guankou Formation red beds, with the bedrock mainly composed of mudstone. Red gypsum beds are distributed at depths of 30-40m and 70-80m below the surface, with severe gypsum dissolution observed in some areas. Solution fissures, pores, caverns, and cavities are all well-developed. The test samples used in this case study are core samples from the project's preliminary exploration drilling. The engineering geological profile is shown below. Figure 1 Red gypsum rock cores Figure 2 The specific implementation steps for this case are as follows:

[0060] (1) According to the existing research on the dissolution characteristics of red gypsum rock, gypsum is a medium soluble salt. The higher its content, the easier it is to be dissolved. The strength of the rock mass can reflect the rock mass structure and cementation degree. The higher the strength, the better the cementation between particles, and the more difficult it is to be dissolved. The permeability coefficient can represent the density and connectivity of groundwater dissolution channels. The more developed the rock mass fissures, the higher the permeability coefficient, and the easier it is to be dissolved. The wave velocity can reflect the integrity of the rock mass to a certain extent, thus indirectly reflecting the permeability characteristics.

[0061] The evaluation system for the site's erosion potential is shown in Table 1. The evaluation indicators are divided into three levels: easy to erode, moderately erode, and difficult to erode, with a maximum score of 10 points and a minimum score of 0 points. Each individual indicator is scored by interpolation based on the measured values ​​of the parameters.

[0062] Table 1: Evaluation System for Dissolution Potential of the Invention

[0063]

[0064] (2) Based on the fresh red gypsum rock cores obtained from the ZK2 exploration drilling at the site, four gypsum rock samples with similar lithology (i.e., red gypsum rock core samples) were selected and processed into cylindrical samples with a diameter of about 50 mm and a height of about 50 mm to 100 mm. The samples were numbered, photographed, and the mass (m0) and wave velocity (v0) of each sample were measured. Two samples were selected for uniaxial compression tests to obtain the natural single pile compressive strength (R0) of the samples before dissolution.

[0065] Two single-pile compression test samples were crushed and ground into powder, divided into two groups, and the samples were extracted using the quartering method. X-ray diffraction was used to identify the mineral composition and analyze the mineral content. The mineral types and contents of the gypsum rock in each group were analyzed, and the test results are shown in Table 2. The test analysis shows that the main mineral components of the gypsum rock at this site are gypsum, quartz, hematite, kaolinite, and nine other minerals. The average gypsum content is 46.48%. According to the grading table for dissolution potential, the single index A of gypsum content is 6.64 points, indicating a medium dissolution level.

[0066] Table 2: X-ray diffraction analysis results of gypsum rock

[0067]

[0068] Two processed gypsum rock samples were subjected to uniaxial compression tests in their natural state. The uniaxial compressive strength values ​​were measured to be 16.45 MPa and 17.79 MPa, respectively, with an average natural uniaxial compressive strength of 17.12 MPa. According to the dissolution potential grading table, the rock mass strength single index B = 6.58 points, and the single index evaluation belongs to moderate dissolution.

[0069] Three exploration boreholes (ZK1, ZK2, and ZK3) were subjected to segmented water pressure tests. Three representative sections from each borehole were selected for the tests to obtain the permeability and permeability coefficient of the rock mass. The test results are shown in Table 3. The tests show that the permeability coefficient of the rock mass at this site is between 5.28 × 10⁻⁶. -4 cm / s~1.03×10 -2 cm / s, with an average permeability coefficient of 5.57×10 -3 The water flow rate is cm / s, indicating a generally weakly permeable layer. According to the dissolution potential grading table, the single-index permeability coefficient C = 5.36 points, classifying it as a medium-level dissolution layer.

[0070] Table 3: Results of borehole pressure water test at three sites (ZK1, ZK2, ZK3):

[0071]

[0072] Two remaining processed core samples (i.e., red gypsum rock core sample 5) were selected for dynamic water dissolution tests. The dynamic water dissolution test is existing technology, which is understood by those skilled in the art. (See attached diagram.) Figure 5 For example, a specific dynamic water corrosion test includes the following: A 200L constant temperature water tank 1 is placed on the test rack, and the water temperature is controlled at 22±1℃. A stop valve 2 is installed at the outlet of the constant temperature water tank 1. A water guide pipe 3 with a diameter of 30cm and a height of 40cm is used to guide deionized water into the reaction chamber 4 along the side wall. A stop valve is installed at the bottom outlet of the reaction chamber 4, and the deionized water after the corrosion reaction is guided through the water guide pipe 3 to a 10L beaker 7.

[0073] First, a permeable stone base was placed in reaction chamber 4. The processed sample (i.e., red gypsum rock core sample 5) was then placed on the permeable stone base 6. Two parallel test samples were placed in the reaction chamber at a time. Deionized water was injected into reaction chamber 4 until all samples (i.e., red gypsum rock core sample 5) were submerged to a depth of approximately 10 cm. The stop valves 2 at the corresponding inlet and outlet of reaction chamber 4 were adjusted simultaneously to ensure that the inlet and outlet water flow rates of the reaction chamber were consistent, simulating the dynamic water dissolution process of gypsum rock. According to the results of the in-situ pressure water test at the exploration site, the controlled flow rate of the reaction chamber was 3 ml / min, which is consistent with the actual groundwater velocity field at the test site.

[0074] After adjusting the stop valve 2 to control the average flow rate at the outlet of reaction chamber 4 to 3 mL / min, the experiment began, and the reaction start time was recorded. The water flow rate at outlet 4 of each reaction chamber and the salinity of the dissolved solution in the measuring cup were tested daily. Thirty-five days after the start of the experiment, two parallel samples were removed from the reaction chamber. The surface moisture of the samples was gently wiped off with a semi-damp towel, and the mass (m1) and wave velocity (v1) of the etched samples were measured. The physical and mechanical parameters of the natural uniaxial compressive strength (R1) of the two rock samples were determined.

[0075] The statistical data on the loss of mass, wave velocity, and uniaxial compressive strength of gypsum rock samples before and after the dynamic water dissolution test are shown in Tables 4, 5, and 6. The average mass loss rate (m) of the gypsum rock specimens after 35 days of dynamic water dissolution is also presented. △ Uniaxial compressive strength loss rate R △ Wave velocity loss rate v △ The percentages were 9.26%, 73.83%, and 13.00%, respectively. The uniaxial compressive strength loss rate was the highest, while the mass loss rate and wave velocity loss rate were relatively close. Dissolution had the greatest impact on the rock mass strength.

[0076] Table 4: Statistics of Mass Loss Rate in Dissolution Tests

[0077]

[0078] Table 5: Statistical Table of Natural Uniaxial Compressive Strength Loss Rate (i.e., Rock Mass Strength Loss Rate) in Dissolution Tests

[0079]

[0080] Table 6: Statistics of Wave Velocity Loss Rate in Dissolution Tests

[0081]

[0082] The weights of gypsum content (A), rock mass strength (B), and permeability coefficient (C), and the comprehensive dissolution potential index Z are calculated based on the average mass loss rate m△, uniaxial compressive strength loss rate R△, and wave velocity loss rate v△. Total loss rate T △ =m △ +R △ +v △ =9.26 + 73.83 + 13.00 = 96.09, calculate the weight of each individual evaluation indicator: w A =m △ / T △ =9.62 / 96.06 = 9.63%, w B =R △ / T △ =73.8 / 96.06 = 76.83%, w C =v △ / T △=13.00 / 96.06 = 13.53%. Comprehensive dissolution potential index Z = A·w A +B·w B +C·w c =6.64×9.63%+6.58×76.83%+5.36×13.53%=6.42. Therefore, the comprehensive dissolution potential index Z of this site is 6.42 points, the comprehensive dissolution potential level of the red gypsum rock of the site is medium, and the site dissolution risk level is medium.

Claims

1. A method for evaluating the dissolution potential of red-bed gypsum rock masses, comprising: (1) Establish a dissolution potential evaluation system based on different red gypsum rock masses; (2) Based on the various indicators in the dissolution potential evaluation system, test the corresponding index data of each indicator of the red bed gypsum rock mass; (3) Based on the index data of the tested red gypsum rock mass and calculate the comprehensive dissolution potential index Z, obtain the dissolution potential of the red gypsum rock mass based on the score of the calculated comprehensive dissolution potential index Z. The establishment of the evaluation system for the dissolution potential of the red gypsum rock mass includes: (1.1) According to the dissolution of the rock mass, it is divided into three levels: easily soluble, moderately soluble, and difficult to soluble. (1.2) The three levels are divided into a segment based on a 10-point system. The segment value for easy corrosion in the three levels is 10-7 points, the segment value for moderate corrosion in the three levels is 7-4 points, and the segment value for difficult corrosion in the three levels is 4-0 points. (1.3) Test the gypsum content A of different red gypsum rock bodies. The value range of gypsum content A is 0-100%. The range of gypsum content A in red gypsum rock bodies is 50-100% and is classified as easily soluble. The range of gypsum content A in red gypsum rock bodies is 20-50% and is classified as moderately soluble. The range of gypsum content A in red gypsum rock bodies is 0-20% and is classified as difficult to dissolve. (1.4) Test the rock mass strength B of different red gypsum rock masses. The rock mass strength B value of 0-15 MPa is classified as easily soluble, the rock mass strength B value of 15.0-30.0 MPa is classified as moderately soluble, and the rock mass strength B value of ≥30.0 ​​MPa is classified as difficult to dissolve. (1.5) Test the permeability coefficient C of different red gypsum rock masses. The value of permeability coefficient C is greater than or equal to 10. -2 The permeability coefficient (C) is classified as easily soluble (cm / s) and is above 10. -4 —10 -2 The range between cm / s is classified as intermediate dissolution, with a permeability coefficient less than or equal to 10. - 4 The cm / s speed is classified as difficult to dissolve; (1.6) Dynamic water dissolution tests were conducted on different red gypsum rock masses. The comprehensive dissolution potential index Z was obtained based on the dynamic water dissolution test structure. When the comprehensive dissolution potential index Z was 0-4, it was classified as difficult to dissolve; when the comprehensive dissolution potential index Z was 4-7, it was classified as moderately dissolved; and when the comprehensive dissolution potential index Z was 7-10, it was classified as easily dissolved. wherein Z = A·w A + B·w B + C·w c ; w A = m △ / T △ ; w B =R △ / T △ ; w C =v △ / T △ ; m △ R represents the average mass loss rate after dynamic water dissolution tests on red gypsum rock masses. △为 The average rock mass strength loss rate after dynamic water dissolution test of red gypsum rock mass, v △ The average wave velocity loss rate after dynamic water dissolution test of the red gypsum rock mass; the total loss rate T △ = m △ +R △ +v △ .

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