Recognition method of cement-based slurry stone body for mine water disaster area treatment
Through clean water cleaning and the use of conventional materials and equipment, the cement slurry stone bodies, clay cement slurry stone bodies and mud rocks are quickly identified, solving the problem of rapid distinction in the area of mine water damage management, and achieving rapid and accurate identification of the construction site and judging the diffusion range of the slurry.
Patent Information
- Application Number
- CN202510311308.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-17
- Publication Date
- 2025-06-27
AI Technical Summary
In the prior art, cement slurry stone bodies, clay cement slurry stone bodies and mud rocks are difficult to quickly distinguish in the management of mine water damage, resulting in the inability to accurately judge the diffusion range of the slurry.
Clean the debris to be identified by clean water, measure their specific gravity, observe the reaction with dilute hydrochloric acid and the crushing situation in clean water, combine the preliminary appearance, and use conventional materials and equipment such as dilute hydrochloric acid, solid hydrometer and pH tester for rapid identification.
Quickly and accurately distinguish cement slurry stone bodies, clay cement slurry stone bodies and mud rocks at the construction site of mine water damage, provide data support for the slurry diffusion range, and promote the promotion of advanced control technology in water damage areas.
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Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of mine water disaster area treatment methods, and relates to a method for identifying cement-based slurry stone bodies used for mine water disaster area treatment. Background Technique
[0002] With the development of directional drilling technology and grouting technology, the grouting treatment technology for water disaster areas has gradually become an important method for treating floor water disasters and roof water disasters. Due to its reliable treatment effect, wide treatment area, and the ability to carry out advanced treatment before the mining and excavation engineering coverage, this technology has developed rapidly in recent years. Mine water disaster area treatment is carried out on the ground or underground. By using directional drilling technology to construct long-distance directional boreholes, water-conducting channels or aquifers are exposed, and grouting is carried out into the water-conducting channels or aquifers to block the channels or transform the aquifers into water-resisting layers, thereby ensuring the mining and excavation safety of the mine. At present, the commonly used grouting material for floor area treatment is mainly single-component cement slurry. Considering the need for flexibility in roof area treatment, some clay is often added to form clay-cement slurry based on cement. During the area treatment, it is necessary to judge the diffusion range of the slurry through the situation of slurry stone bodies in the cuttings returned during drilling. Among them, the debris characteristics of sandstone and limestone are more obvious and can be accurately distinguished. However, the cement slurry stone body, clay-cement slurry stone body, and mudstone are all grayish-white, grayish-yellow, grayish-black and other debris that are difficult to distinguish. Although they can be distinguished by means such as XRD and scanning electron microscopy, the sample preparation and testing time are both long, and the construction site of the area treatment basically does not have the conditions to equip the above-mentioned instruments, which cannot meet the need for rapid discrimination on the site of the area treatment project. Therefore, it is necessary to establish a set of rapid identification methods for cement-based slurry stone bodies to achieve the purpose of rapid differentiation on the construction site of the area treatment and provide data support for judging the diffusion range of the slurry. Summary of the Invention
[0003] The purpose of the invention is to provide a method for identifying cement-based slurry stone bodies used for mine water disaster area treatment, which solves the problem that in the prior art, the cement slurry stone body, clay-cement slurry stone body, and mudstone need to be distinguished by means of XRD and scanning electron microscopy, but the construction site of the area treatment does not have the conditions to equip the above-mentioned instruments. Therefore, it cannot meet the need for rapid discrimination on the site of the area treatment project.
[0004] The technical solution adopted by the invention is that the method for identifying cement-based slurry stone bodies used for mine water disaster area treatment is specifically implemented according to the following steps: Step 1, use clear water to clean the cuttings to be identified; Step 2, preliminarily distinguish the cuttings to be identified that have been rinsed in Step 1 through appearance; Step 3, based on Step 1, measure the specific gravity of the cuttings to be identified, observe the reaction of the cuttings to be identified with dilute hydrochloric acid, soak the cuttings to be identified in clean water and measure the pH of the leachate, and observe the fragmentation of the cuttings to be identified in clean water; Step 4, comprehensively determine the type of cuttings based on the results of Steps 2-3.
[0005] Preferably, Step 1 is specifically: place the cuttings to be identified in a filter screen and wash them with clean water to remove the drilling fluid components on the surface of the cuttings, and use a pH tester to test the surface of the washed cuttings and the water used to wash the cuttings to be identified until the pH of the surface of the cuttings and the water used to wash the cuttings to be identified is the same as the pH of the clean water used.
[0006] Preferably, the clean water is clear and free of impurities and has a pH of 7-8.
[0007] Preferably, Step 2 is specifically: dry the cuttings washed in Step 1 in an oven, observe the color and surface roughness of the cuttings, and use fingers to pinch to test the strength of the cuttings to determine whether it is a cement slurry concretion or clay cement slurry or mudstone. Among them, the cement slurry concretion is gray or off-white, with particles on the surface and cannot be crushed by fingers; the clay cement slurry is grayish-yellow, yellowish-brown, or light yellow, with a delicate surface, no particles, and can be crushed by fingers; the mudstone is gray, dark gray, or grayish-black, with a delicate surface or particles, and cannot be crushed by hand.
[0008] Preferably, in Step 3, measuring the specific gravity of the cuttings to be identified is specifically: use a solid specific gravity meter to measure the specific gravity of the cuttings to be identified, and retain 2 decimal places for the measurement result. The specific gravity of the cement slurry concretion is between 1.6 and 2.1, the specific gravity of the clay cement slurry is between 1.4 and 1.9, and the specific gravity of the mudstone is between 2.4 and 2.8.
[0009] Preferably, in Step 3, observing the reaction of the cuttings to be identified with dilute hydrochloric acid is specifically: Put the cuttings to be identified into 5% dilute hydrochloric acid and observe. The cement slurry concretion reacts violently with dilute hydrochloric acid to produce bubbles, the clay cement slurry reacts with dilute hydrochloric acid to produce bubbles, and the mudstone has no obvious reaction with dilute hydrochloric acid.
[0010] Preferably, in Step 3, soaking the cuttings to be identified in clean water and measuring the pH of the leachate is specifically: Soak the cuttings to be identified in clean water, and the mass ratio of the cuttings to be identified to clean water is 1:10. The soaking time of the cuttings is 1 h, and then use a pH detector to measure the pH of the leachate. Retain 1 decimal place for the measurement result. The pH of the leachate of the cement slurry concretion is ≥11, the pH of the leachate of the clay cement slurry concretion is 11>pH≥9, and the pH of the leachate of the mudstone is <9.
[0011] Preferably, in step 3, observe the fragmentation of the cuttings to be identified in clean water. Specifically: Immerse the cuttings to be identified in clean water for 1 hour and observe their disintegration. Specifically: There is no fragmentation of the cement slurry stone body and the clay-cement slurry stone body, that is, no disintegration in water immersion, and the mud-like magma fragments, that is, disintegration in water immersion.
[0012] Preferably, the clean water in step 3 is water that is clear, free of impurities, and has a pH of 7 - 8.
[0013] Preferably, step 4 is specifically as follows: Distinguish the clay-cement slurry stone body and the mud-like rock, or the cement slurry stone body and the mud-like rock, based on the reaction of the cuttings to be identified with dilute hydrochloric acid and the fragmentation of the cuttings to be identified in clean water; distinguish the cement slurry stone body and the clay-cement slurry stone body based on the specific gravity of the cuttings to be identified and the pH of the leachate measured after immersing the cuttings to be identified in clean water. Finally, assist in distinguishing the cement slurry stone body and the clay-cement slurry stone body according to step 2.
[0014] The beneficial effects of the present invention are: With the conventional materials and equipment such as dilute hydrochloric acid, solid hydrometer, and pH tester equipped at the construction site of the regional governance project, the present invention can quickly and accurately distinguish the cement slurry stone body, the clay-cement slurry stone, and the mud-like rock debris, providing data support for judging the slurry diffusion range, and is of great significance for promoting the advanced treatment technology for water hazard areas. Specific embodiments
[0015] The following is a detailed description in combination with specific embodiments.
[0016] Example 1 The method for identifying the cement-based slurry stone body for mine water hazard area governance of the present invention is specifically implemented according to the following steps: Step 1, use clean water to wash the cuttings to be identified; Step 2, preliminarily distinguish the cuttings to be identified that have been washed in step 1 through appearance; Step 3, on the basis of step 1, measure the specific gravity of the cuttings to be identified, observe the reaction of the cuttings to be identified with dilute hydrochloric acid, immerse the cuttings to be identified in clean water to measure the pH of the leachate, and observe the fragmentation of the cuttings to be identified in clean water; Step 4, comprehensively determine the type of cuttings according to the results of steps 2 - 3.
[0017] Example 2 The method for identifying the cement-based slurry stone body for mine water hazard area governance of the present invention is specifically implemented according to the following steps: Step 1: Place the cuttings to be identified in a filter screen and wash them with clean water to remove the drilling fluid components on the surface of the cuttings. Then use a pH tester to test the surface of the washed cuttings and the water used to wash the cuttings to be identified until the pH of the surface of the cuttings and the water used to wash the cuttings to be identified is the same as that of the clean water used. Here, the clean water is clear, free of impurities, and has a pH of 7 - 8. Step 2: Make a preliminary distinction of the cuttings to be identified that have been rinsed in Step 1 by appearance. Step 3: On the basis of Step 1, measure the specific gravity of the cuttings to be identified, observe the reaction of the cuttings to be identified with dilute hydrochloric acid, soak the cuttings to be identified in clean water and measure the pH of the leachate, and observe the fragmentation of the cuttings to be identified in clean water. Step 4: Comprehensively determine the type of cuttings according to the results of Steps 2 - 3.
[0018] Example 3 The method for identifying the cement-based slurry stone body for mine water disaster area treatment of the present invention is specifically implemented according to the following steps: Step 1: Place the cuttings to be identified in a filter screen and wash them with clean water to remove the drilling fluid components on the surface of the cuttings. Then use a pH tester to test the surface of the washed cuttings and the water used to wash the cuttings to be identified until the pH of the surface of the cuttings and the water used to wash the cuttings to be identified is the same as that of the clean water used. Here, the clean water is clear, free of impurities, and has a pH of 7 - 8. Step 2: Dry the cuttings that have been washed in Step 1 in an oven, observe the color and surface roughness of the cuttings, and use fingers to pinch to test the strength of the cuttings to determine whether it is a cement slurry stone body, clay cement slurry, or mudstone. Among them, the cement slurry stone body is gray or off-white, with particles on the surface and cannot be crushed by fingers; the clay cement slurry is grayish-yellow, yellowish-brown, or light yellow, with a delicate surface, no particles, and can be crushed by fingers; the mudstone is gray, dark gray, or grayish-black, with a delicate surface or particles, and cannot be crushed by hand. Step 3: On the basis of Step 1, measure the specific gravity of the cuttings to be identified, observe the reaction of the cuttings to be identified with dilute hydrochloric acid, soak the cuttings to be identified in clean water and measure the pH of the leachate, and observe the fragmentation of the cuttings to be identified in clean water. Step 4: Comprehensively determine the type of cuttings according to the results of Steps 2 - 3.
[0019] Example 4 The method for identifying the cement-based slurry stone body for mine water disaster area treatment of the present invention is specifically implemented according to the following steps: Step 1: Place the cuttings to be identified in a filter screen and wash them with clean water to remove the drilling fluid components on the surface of the cuttings. Then use a pH tester to test the surface of the washed cuttings and the water used to wash the cuttings to be identified until the pH of the surface of the cuttings and the water used to wash the cuttings to be identified is the same as that of the clean water used. Here, the clean water is clear and free of impurities, and its pH is 7 - 8. Step 2: Dry the cuttings washed in Step 1 in an oven, observe the color and surface roughness of the cuttings, and use fingers to pinch to test the strength of the cuttings to determine whether it is a cement slurry concretion or clay cement slurry or mudstone. Among them, the cement slurry concretion is gray or off - white, with particles on the surface and cannot be crushed by fingers; the clay cement slurry is gray - yellow, yellowish - brown, or light yellow, with a delicate surface, no particles, and can be crushed by fingers; the mudstone is gray, dark gray, or gray - black, with a delicate surface or particles, and cannot be crushed by hand. Step 3: On the basis of Step 1, measure the specific gravity of the cuttings to be identified, observe the reaction of the cuttings to be identified with dilute hydrochloric acid, soak the cuttings to be identified in clean water to measure the pH of the leachate, and observe the fragmentation of the cuttings to be identified in clean water. Among them, the specific method for measuring the specific gravity of the cuttings to be identified is as follows: Use a solid specific gravity meter to measure the specific gravity of the cuttings to be identified, and retain two decimal places for the measurement result. The specific gravity of the cement slurry concretion is between 1.6 and 2.1, the specific gravity of the clay cement slurry is between 1.4 and 1.9, and the specific gravity of the mudstone is between 2.4 and 2.8. The specific method for observing the reaction of the cuttings to be identified with dilute hydrochloric acid is as follows: Put the cuttings to be identified into dilute hydrochloric acid with a concentration of 5% and observe. The cement slurry concretion reacts violently with dilute hydrochloric acid to produce bubbles, the clay cement slurry reacts with dilute hydrochloric acid to produce bubbles, and the mudstone has no obvious reaction with dilute hydrochloric acid. The specific method for soaking the cuttings to be identified in clean water to measure the pH of the leachate is as follows: Soak the cuttings to be identified in clean water. The mass ratio of the cuttings to be identified to clean water is 1:10, and the soaking time of the cuttings is 1 h. Then use a pH detector to measure the pH of the leachate, and retain one decimal place for the measurement result. The pH of the leachate of the cement slurry concretion is ≥11, the pH of the leachate of the clay cement slurry concretion is 11 > pH ≥ 9, and the pH of the leachate of the mudstone is < 9.
[0020] The specific method for observing the fragmentation of the cuttings to be identified in clean water is as follows: Put the cuttings to be identified into clean water and soak for 1 h, and observe its disintegration situation. Specifically, the cement slurry concretion and the clay cement slurry concretion have no fragmentation, that is, no disintegration in water immersion, and the mudstone magma fragments, that is, disintegration in water immersion. Here, the clean water is clear and free of impurities, and its pH is 7 - 8. Step 4: Comprehensively determine the type of cuttings according to the results of Steps 2 - 3.
[0021] Example 5 The identification method of the cement-based slurry stone body for the treatment of mine water disaster areas of the present invention is specifically implemented according to the following steps: Step 1: Place the cuttings to be identified in a filter screen and wash them with clean water to remove the drilling fluid components on the surface of the cuttings, and use a pH tester to test the surface of the cuttings after washing and the water used to wash the cuttings to be identified until the pH of the surface of the cuttings and the water used to wash the cuttings to be identified is the same as the pH of the clean water used. Herein, the clean water is clear without impurities and has a pH of 7-8. Step 2: Dry the cuttings washed in Step 1 in an oven, observe the color and surface roughness of the cuttings, and use fingers to pinch and test the strength of the cuttings to determine whether it is a cement slurry stone body, clay cement slurry or mudstone. Herein, the color of the cement slurry stone body is gray or off-white, there are particles on the surface, and it cannot be crushed by fingers; the color of the clay cement slurry is grayish yellow, yellowish brown or light yellow, the surface is delicate, there are no particles, and it can be crushed by fingers; the mudstone is gray, dark gray or grayish black, the surface is delicate or there are particles, and it cannot be crushed by hand. Step 3: On the basis of Step 1, measure the specific gravity of the cuttings to be identified, observe the reaction of the cuttings to be identified with dilute hydrochloric acid, soak the cuttings to be identified in clean water and measure the pH of the leachate, and observe the fragmentation of the cuttings to be identified in clean water. Among them, the specific method for measuring the specific gravity of the cuttings to be identified is: use a solid specific gravity meter to measure the specific gravity of the cuttings to be identified, and retain 2 decimal places for the measurement result. The specific gravity of the cement slurry stone body is between 1.6 and 2.1, the specific gravity of the clay cement slurry is between 1.4 and 1.9, and the specific gravity of the mudstone is between 2.4 and 2.8. The specific method for observing the reaction of the cuttings to be identified with dilute hydrochloric acid is: Put the cuttings to be identified into dilute hydrochloric acid with a concentration of 5% and observe. The cement slurry stone body reacts violently with dilute hydrochloric acid to produce bubbles, the clay cement slurry reacts with dilute hydrochloric acid to produce bubbles, and the mudstone has no obvious reaction with dilute hydrochloric acid. The specific method for soaking the cuttings to be identified in clean water and measuring the pH of the leachate is: Soak the cuttings to be identified in clean water, the mass ratio of the cuttings to be identified to the clean water is 1:10, the soaking time of the cuttings is 1 h, and then use a pH detector to measure the pH of the leachate, and retain 1 decimal place for the measurement result. The pH of the leachate of the cement slurry stone body is ≥11, the pH of the leachate of the clay cement slurry stone body is 11 > pH ≥ 9, and the pH of the leachate of the mudstone is < 9.
[0022] Observe the fragmentation of the cuttings to be identified in clean water. Specifically: put the cuttings to be identified into clean water and soak for 1 h, and observe its disintegration situation. Specifically: there is no fragmentation of the cement slurry stone body and the clay cement slurry stone body, that is, there is no disintegration in water immersion, and the mudstone magma fragments, that is, there is disintegration in water immersion. Herein, the clean water is clear without impurities and has a pH of 7-8. Step 4. Comprehensively determine the type of cuttings based on the results of Steps 2 - 3, specifically as follows: Distinguish clay cement slurry stone bodies and mud - like rocks, or cement slurry stone bodies and mud - like rocks according to the reaction of the cuttings to be identified with dilute hydrochloric acid and the fragmentation of the cuttings to be identified in clear water; distinguish cement slurry stone bodies and clay cement slurry stone bodies according to the specific gravity of the cuttings to be identified and the pH of the leachate measured after soaking the cuttings to be identified in clear water. Finally, assist in distinguishing cement slurry stone bodies and clay cement slurry stone bodies according to Step 2. The details are shown in Table 1: Table 1 Characteristic discrimination table of cement - based slurry stone bodies
[0023] Example 6 Based on Example 5, the identification method of cement - based slurry stone bodies for mine water disaster area treatment in the present invention is specifically as follows: 1. Use clear water to wash the cuttings to be identified The study area is for treating the roof water disaster of the working face. A roof area treatment project has been carried out. The lithology of the drilling layer is interbedded sandstone and mudstone. The grouting materials include cement single - liquid slurry and clay cement slurry. It is necessary to identify the types of cuttings returned from the borehole. Among them, the sandstone is mainly composed of quartz, and the discrimination characteristics are obvious, so no further discrimination is required. It is necessary to distinguish clay cement slurry stone bodies, cement single - liquid slurry stone bodies, and mud - like rock cuttings. Take a small amount of the above three types of samples respectively and number them as Sample 1, Sample 2, and Sample 3.
[0024] First, place the cuttings to be identified in a filter screen and wash them with clear water. The clear water is clear and transparent, without obvious pollution, and the pH = 7.6. Wash away the drilling fluid components on the surface of the cuttings until the water is clear and the pH is the same as that of the clear water.
[0025] 2. Make a preliminary distinction of the cuttings to be identified through appearance Dry the washed cuttings samples in an oven, observe the color and surface roughness of the cuttings, and gently squeeze them with fingers to test the strength of the cuttings. The color of Sample 1 is yellowish - brown, the surface is delicate, and it can be crushed by hand. The color of Sample 2 is gray and off - white, with granular on the surface and cannot be crushed by hand. The mud - like rock of Sample 3 is gray - black, the surface is delicate, with particles locally, and cannot be crushed by hand.
[0026] 3. Measure the specific gravity of the cuttings to be identified Use a solid density meter to measure the specific gravity of the samples respectively. The specific gravity of Sample 1 is 1.62, that of Sample 2 is 1.85, and that of Sample 3 is 2.62.
[0027] 4. Observe the reaction of the cuttings to be tested with dilute hydrochloric acid React the sample with dilute hydrochloric acid at a concentration of 5%. Sample 1 foams when reacting with dilute hydrochloric acid, Sample 2 reacts violently with dilute hydrochloric acid and foams vigorously, and there is no obvious reaction for Sample 3 with dilute hydrochloric acid.
[0028] 5. Measure the pH of the clear water leachate of the cuttings to be identified. Immerse the samples in clear water respectively. The pH of the clear water is 7.6, the mass ratio of cuttings to clear water is cuttings: clear water = 1:10, the immersion time of the cuttings is 1 h, the test equipment is a pH detector. The pH of the leachate of Sample 1 is 10.8, the pH of the leachate of Sample 2 is 12.8, and the pH of the leachate of Sample 3 is 8.2.
[0029] 6. Observe the fragmentation of the cuttings to be identified in clear water. Put the cuttings to be identified into clear water and soak for 1 h. Samples 1 and 2 are not fragmented, and Sample 3 is fragmented.
[0030] 7. Comprehensively determine the type of cuttings according to the results of steps 2 - 6. According to steps 4 and 6, Samples 1 and 2 can be distinguished as clay cement slurry stones and cement slurry stones, and Sample 3 is a mud - type rock stone. According to steps 5 and 3, Sample 1 is further distinguished as a clay cement slurry stone body, and Sample 2 is a cement slurry stone body. Finally, according to step 2, it is assisted to distinguish that Sample 1 is a clay cement slurry stone body and Sample 2 is a cement slurry stone body. The detailed situation is shown in Table 2.
[0031] Table 2 Sample Identification Feature Table
[0032] In the construction site of the regional governance project of the present invention, by equipping conventional materials and equipment such as dilute hydrochloric acid, solid hydrometers, and pH detectors, the cement slurry stone body, clay cement slurry stone, and mud - type rock debris can be quickly and accurately distinguished, providing data support for judging the slurry diffusion range, which has important significance for popularizing the advanced treatment technology for water - hazard areas.
Claims
1. A method for identifying cement-based slurry stones for use in mine water hazard area management, characterized in that: The specific steps are as follows: Step 1, washing the rock cuttings to be identified with clean water; Step 2, preliminarily distinguishing the rock cuttings to be identified after being washed in step 1 by appearance; Step 3, based on step 1, measuring the specific gravity of the rock cuttings to be identified, observing the reaction of the rock cuttings to be identified with dilute hydrochloric acid, immersing the rock cuttings to be identified in clean water to measure the pH of the leaching solution, and observing the crushing of the rock cuttings to be identified in the clean water; Step 4, comprehensively determine the type of rock cuttings based on the results of steps 2-3.
2. The method for identifying cement-based slurry stones for mine water hazard area management according to claim 1, characterized in that: The step 1 specifically includes: placing the rock cuttings to be identified in a filter screen and washing them with clean water to wash away the drilling fluid components on the surface of the rock cuttings, and testing the surface of the cleaned rock cuttings and the water used to wash the rock cuttings to be identified with a pH tester until the pH of the surface of the rock cuttings and the water used to wash the rock cuttings to be identified is consistent with the pH of the clean water used.
3. The method for identifying cement-based slurry stones for mine water hazard area management according to claim 2, characterized in that: The clean water is clear and free of impurities and has a pH of 7-8.
4. The method for identifying cement-based slurry stones for mine water hazard area management according to claim 2, characterized in that: The step 2 specifically comprises: drying the rock chips cleaned in the step 1 in an oven, observing the color and surface roughness of the rock chips, and testing the strength of the rock chips by pinching with fingers to determine whether the rock chips are cement slurry stone body, clay cement slurry, or mud rock, wherein the cement slurry stone body is gray or off-white in color, has granules on the surface, and cannot be crushed by fingers; the clay cement slurry is gray-yellow, khaki, or light yellow in color, has a fine surface without granules, and can be crushed by fingers; and the mud rock is gray, dark gray, or gray-black in color, has a fine surface or has granules, and cannot be crushed by hands.
5. The method for identifying cement-based slurry stones for mine water hazard area management according to claim 4, characterized in that: The specific gravity of the rock cuttings to be identified in step 3 is specifically measured as follows: the specific gravity of the rock cuttings to be identified is measured using a solid specific gravity meter, and the measurement result is retained to two decimal places. The specific gravity of cement slurry stone body is between 1.6 and 2.1, the specific gravity of clay cement slurry is between 1.4 and 1.9, and the specific gravity of mud rock is between 2.4 and 2.
8.
6. The method for identifying cement-based slurry stones for mine water hazard area management according to claim 5, characterized in that: In step 3, the reaction between the rock cuttings to be identified and the dilute hydrochloric acid is observed as follows: The rock cuttings to be identified were placed in 5% dilute hydrochloric acid for observation. Cement slurry stone bodies reacted violently with dilute hydrochloric acid to produce bubbles, clay cement slurry reacted with dilute hydrochloric acid to produce bubbles, and mudstone had no obvious reaction with dilute hydrochloric acid.
7. The method for identifying cement-based slurry stones for treating water hazard areas in mines according to claim 6, characterized in that: In step 3, the rock cuttings to be identified are immersed in clean water to measure the pH of the leachate as follows: Soak the rock cuttings to be identified in clean water with a mass ratio of 1:10 and soaking time of 1 hour. Then use a pH tester to measure the pH of the leachate. Keep one decimal place in the measurement result. The pH of the leachate of cement slurry stone body is ≥11, the pH of the leachate of clay cement slurry stone body is 11> ≥9, and the pH of the leachate of mud rock is <9.
8. The method for identifying cement-based slurry stones for treating water hazard areas in mines according to claim 7, characterized in that: In step 3, the fragmentation of the rock fragments to be identified in clean water is observed, specifically: the rock fragments to be identified are immersed in clean water for 1 hour, and their disintegration is observed, specifically: the cement slurry stone body and the clay cement slurry stone body are not broken, that is, there is no disintegration in water immersion, and the mud magma is broken, that is, it is disintegrated in water immersion.
9. The method for identifying cement-based slurry stones for treating water hazard areas in mines according to claim 8, characterized in that: The clean water in step 3 is clear water without impurities and with a pH of 7-8.
10. The method for identifying cement-based slurry stones for treating water hazard areas in mines according to claim 8, characterized in that: The step 4 is specifically as follows: Clay cement slurry stone bodies and mud rocks, or cement slurry stone bodies and mud rocks, are distinguished according to the reaction of the rock cuttings to be identified with dilute hydrochloric acid and the crushing of the rock cuttings to be identified in clean water; cement slurry stone bodies and clay cement slurry stone bodies are distinguished according to the specific gravity of the rock cuttings to be identified and the pH value of the leaching solution measured when the rock cuttings to be identified are immersed in clean water; finally, step 2 is used to assist in distinguishing cement slurry stone bodies and clay cement slurry stone bodies.
Citation Information
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