CN112379077A - Experimental method for research on evolution of deep underground water formation in bedrock fracture area - Google Patents
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- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 4
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Abstract
The invention belongs to the technical field of hydrogeology, and particularly discloses an experimental method suitable for research on evolution of deep underground water formation in bedrock fracture areas, which comprises the following steps: step 1, coring and drilling a research area in a bedrock fissure area, and collecting deep undisturbed underground water; step 2, carrying out indoor water-rock action experiments at different temperatures on the deep undisturbed groundwater collected in the step 1 and the core samples with corresponding depths; and 3, collecting the water sample after the water-rock action reaction in the step 2, sending the sample to test, and analyzing the formation and evolution process of the deep underground water in the bedrock fracture area according to the test result, thereby completing the research on the formation and evolution process of the deep underground water in the bedrock fracture area. The method can provide quantitative basis for research on formation and evolution of deep underground water in bedrock fracture areas by developing indoor deep water-rock action experiments at different temperatures.
Description
Technical Field
The invention belongs to the technical field of hydrogeology, and particularly relates to an experimental method suitable for research on evolution of deep underground water formation in bedrock fracture areas.
Background
The bedrock fracture water is mainly distributed in mountainous regions and high-hilly regions, the lithology of a water-bearing layer is mainly granite, and the underground water is mainly in fracture and fracture zones for joint and fracture development. The bedrock fracture water is a precious underground water resource, but can threaten the construction of large-scale underground engineering, especially the engineering with larger depth. And the formation and evolution process of the deep underground water in the bedrock fracture area is disclosed as the key for the investigation, evaluation, reasonable development and utilization of the deep underground water. However, the research on the formation and evolution process of the underground water at the deep part of the bedrock fracture area is very difficult due to the characteristic that the bedrock fracture water has heterogeneous anisotropy.
In order to solve the problems, the invention provides an experimental technical method suitable for research on evolution of deep underground water formation in bedrock fracture areas.
Disclosure of Invention
The invention aims to provide an experimental method suitable for research on formation and evolution of deep underground water in a bedrock fracture area.
The technical scheme for realizing the purpose of the invention is as follows: an experimental method for research on evolution of deep underground water formation in bedrock fracture areas specifically comprises the following steps:
step 1, coring and drilling a research area in a bedrock fissure area, and collecting deep undisturbed underground water;
step 2, carrying out indoor water-rock action experiments at different temperatures on the deep undisturbed groundwater collected in the step 1 and the core samples with corresponding depths;
and 3, collecting the water sample after the water-rock action reaction in the step 2, sending the sample to test, and analyzing the formation and evolution process of the deep underground water in the bedrock fracture area according to the test result, thereby completing the research on the formation and evolution process of the deep underground water in the bedrock fracture area.
And (2) collecting deep undisturbed underground water by adopting double-plug hydrogeological equipment in the step 1.
The specific steps in the step 2 are as follows:
step 2.1, detecting the mineral components and the content of the core sample before reaction;
step 2.2, preparing the rock core sample detected in the step 2.2 into rock powder;
step 2.3, weighing the rock powder prepared in the step 2.2 according to a set water-rock ratio, weighing the deep original-state underground water collected in the step 1, mixing the rock powder and the deep original-state underground water, stirring and oscillating to obtain a mixed sample of the rock powder and the deep original-state underground water;
step 2.4, weighing a certain amount of rock powder prepared in the step 2.2 according to a set water-rock ratio, measuring deionized water, mixing, stirring and oscillating the rock powder and the deionized water to obtain a mixed sample of the rock powder and the deionized water;
and 2.5, respectively placing the samples prepared in the step 2.3 and the step 2.4 into constant temperature and humidity chambers with different temperatures for reaction to finish the water-rock action experiment.
And (3) preparing the rock core sample in the step 2.2 into rock powder through crushing, grinding and screening.
And 2.2, crushing and grinding by adopting a crusher and a grinder respectively.
And (3) mixing, stirring and oscillating the rock powder and deep undisturbed underground water in the step 2.3 in a conical flask.
And (3) wrapping the mouth of the conical flask in the step 2.3 by using tinfoil, and sealing by using a high-temperature rubber band.
The specific steps of the step 3 are as follows:
step 3.1, cooling the water sample reacted in the step 2.5 to room temperature, and taking the supernatant of the cooled reacted water sample;
and 3.2, centrifuging the supernatant obtained in the step 3.1, storing in a sealed manner, and detecting the chemical components of water, thereby completing the research on the formation and evolution process of deep underground water in the bedrock fracture area.
And 3.2, centrifuging the supernatant in the step 3.1 by adopting an SC-3614 low-speed centrifuge.
And in the step 3.2, the centrifuged supernatant is hermetically stored in a polyethylene sampling bottle.
The invention has the beneficial technical effects that: the experimental method suitable for researching the formation and evolution of the deep underground water in the bedrock fracture area, provided by the invention, can be used for developing an indoor deep water-rock action experiment at different temperatures, so that the technical problem that the research on the formation and evolution process of the deep underground water in the bedrock fracture area is very difficult due to the characteristic that the bedrock fracture water has heterogeneous anisotropy is solved. According to the method, through the indoor deep water-rock action experiment at different temperatures, the quantitative research on the bed rock fracture deep water-rock action process can be achieved, and necessary basis is provided for the research on the formation and evolution of deep underground water in a bed rock fracture area.
Detailed Description
The present invention will be described in further detail with reference to examples.
The invention provides an experimental method for research on evolution of deep underground water formation in a bedrock fracture area, which specifically comprises the following steps:
step 1, in the underground engineering site selection exploration stage of a bedrock fracture area, core drilling construction is carried out on a research area, and deep undisturbed underground water is collected
In the step 1, collecting deep undisturbed groundwater by adopting double-plug hydrogeological equipment, and storing the collected deep undisturbed groundwater in a sealed steel cylinder. Step 2, performing indoor water-rock action experiments at different temperatures on the deep undisturbed groundwater collected in the step 1 and the core samples with corresponding depths to research the formation evolution process of the deep groundwater in the bedrock fracture area; the specific steps of step 2 are as follows:
and 2.1, detecting the mineral components and the content of the core sample before reaction.
The composition and relative content of minerals contained in the solid core sample are measured by adopting a Panalytical X' Pert PRO X-ray diffractometer, and the minerals mainly comprise quartz, potash feldspar, plagioclase feldspar, calcite, dolomite and the like. Mineral components and specific contents are illustrated:
and 2.2, crushing, grinding and screening the core sample detected in the step 2.2 to prepare the core sample into rock powder.
And respectively crushing and grinding the rock core sample by adopting a crusher and a grinder to prepare the rock core sample into 140-200 meshes of rock powder.
Step 2.3, weighing a certain weight of the rock powder prepared in the step 2.2 according to a set water-rock ratio, measuring a certain amount of deep original-state underground water collected in the step 1, mixing, stirring and oscillating the rock powder and the deep original-state underground water to obtain a mixed sample of the rock powder and the deep original-state underground water
Weighing 20 parts of rock powder prepared from 30g of rock core according to a set water-rock ratio of 10:1, and respectively filling the rock powder into 20 conical flasks; then measuring 20 parts of 300mL drilling deep undisturbed groundwater sample, and respectively pouring into the twenty conical flasks; stirring and shaking for 30min, and marking the liquid level; then the mouth of the conical flask is wrapped by tinfoil and sealed by a high-temperature rubber band so as to reduce evaporation in the reaction process; deionized water was added periodically to the flask to the mark to keep the volume of the reaction constant.
Step 2.4, weighing a certain weight of the rock powder prepared in the step 2.2 according to a set water-rock ratio, weighing a certain amount of deionized water, mixing, stirring and oscillating the rock powder and the deionized water to obtain a rock powder and deionized water mixed sample
And (3) replacing the original groundwater sample at the deep part of the drilled hole with deionized water by adopting the same method as the step 2.3 to carry out a control experiment.
Weighing 20 parts of rock powder prepared from 30g of rock core according to a set water-rock ratio of 10:1, and respectively filling the rock powder into 20 conical flasks; then measuring 20 parts of 300mL of ionized water sample, and pouring into the twenty conical flasks respectively; stirring and shaking for 30min, and marking the liquid level; then wrapping the bottle mouth with tinfoil, and sealing with high-temperature rubber band to reduce evaporation in the reaction process; deionized water was added periodically to the mark to keep the volume of the reaction constant.
Step 2.5, respectively placing the samples prepared in the step 2.3 and the step 2.4 into constant temperature and humidity chambers with different temperatures for reaction to finish the water-rock action experiment
And (3) respectively placing the samples prepared in the step 2.3 and the step 2.4 in constant temperature and humidity chambers at room temperature, 30 ℃, 60 ℃ and 90 ℃ for reaction for 1, 3, 7, 14 and 28 days, and completing the water-rock action experiment.
And 3, collecting the water sample after the water-rock action reaction in the step 2.5 for measurement, and analyzing the formation evolution process of the deep underground water in the bedrock fracture area according to the measurement result, thereby completing the research on the formation evolution process of the deep underground water in the bedrock fracture area. The specific steps of step 3 are as follows:
step 3.1, cooling the water sample reacted in the step 2.5 to room temperature, and taking the supernatant of the cooled reacted water sample
After the reaction solution is cooled, the supernatant after the reaction is taken out by a pipette.
And 3.2, centrifuging the supernatant obtained in the step 3.1, storing in a sealed manner, and detecting the chemical components of water, thereby completing the research on the formation and evolution process of deep underground water in the bedrock fracture area.
And (3) centrifuging the supernatant obtained in the step 3.1 by using an SC-3614 low-speed centrifuge, then hermetically storing the centrifuged supernatant in a polyethylene sampling bottle, and feeding the hermetically stored supernatant into a sample to detect the water chemical component of the sample.
Sending the supernatant to an analysis and test center to measure conventional components and trace elements in the supernatant of the reacted water sample.
Conventional component test methods: determination of K in liquid samples Using ICS-1100 ion chromatograph+、Na+、Ca2+、Mg2 +Determination of Cl in liquid samples by 883Basic IC plus ion chromatograph-、SO4 2-、F-、NO3 -Determining CO in the liquid sample by adopting an AT-510 full-automatic titrator3 2-、HCO3 -。
The trace element test method comprises the following steps: the method is characterized in that a NexION300D plasma mass spectrometer is adopted to measure trace elements in a liquid sample, and the trace elements mainly comprise 41 trace elements such as Li, Be, Sc, Ti, V, Mn, Cr, Co, Ni, Cu, Zn, Ga, Rb, Y, Nb, Mo, Cd, Sb, Cs, Ba, La, Ce, Pr, Nd, Sm, Eu, Gd, U, Sr and the like.
The concrete contents are illustrated as follows:
conventional Components
Unit: mg/L
Trace elements
Unit: the present invention is described in detail with reference to the examples, but the present invention is not limited to the examples, and various changes can be made without departing from the gist of the present invention within the knowledge of those skilled in the art. The prior art can be adopted in the content which is not described in detail in the invention.
Claims (10)
1. An experimental method for research on evolution of deep underground water formation in bedrock fracture areas is characterized by comprising the following steps: the method specifically comprises the following steps:
step 1, coring and drilling a research area in a bedrock fissure area, and collecting deep undisturbed underground water;
step 2, carrying out indoor water-rock action experiments at different temperatures on the deep undisturbed groundwater collected in the step 1 and the core samples with corresponding depths;
and 3, collecting the water sample after the water-rock action reaction in the step 2, sending the sample to test, and analyzing the formation and evolution process of the deep underground water in the bedrock fracture area according to the test result, thereby completing the research on the formation and evolution process of the deep underground water in the bedrock fracture area.
2. The experimental method for researching evolution of formation of underground water in deep part of bedrock fracture area according to claim 1, characterized in that: and (2) collecting deep undisturbed underground water by adopting double-plug hydrogeological equipment in the step 1.
3. The experimental method for researching evolution of formation of underground water in deep part of bedrock fracture area according to claim 2, characterized in that: the specific steps in the step 2 are as follows:
step 2.1, detecting the mineral components and the content of the core sample before reaction;
step 2.2, preparing the rock core sample detected in the step 2.2 into rock powder;
step 2.3, weighing the rock powder prepared in the step 2.2 according to a set water-rock ratio, weighing the deep original-state underground water collected in the step 1, mixing the rock powder and the deep original-state underground water, stirring and oscillating to obtain a mixed sample of the rock powder and the deep original-state underground water;
step 2.4, weighing a certain amount of rock powder prepared in the step 2.2 according to a set water-rock ratio, measuring deionized water, mixing, stirring and oscillating the rock powder and the deionized water to obtain a mixed sample of the rock powder and the deionized water;
and 2.5, respectively placing the samples prepared in the step 2.3 and the step 2.4 into constant temperature and humidity chambers with different temperatures for reaction to finish the water-rock action experiment.
4. The experimental method for researching evolution of formation of underground water in deep part of bedrock fracture area according to claim 3, characterized in that: and (3) preparing the rock core sample in the step 2.2 into rock powder through crushing, grinding and screening.
5. The experimental method for researching evolution of formation of underground water in deep part of bedrock fracture area according to claim 4, wherein: and 2.2, crushing and grinding by adopting a crusher and a grinder respectively.
6. The experimental method for researching evolution of formation of underground water in deep part of bedrock fracture area according to claim 5, wherein: and (3) mixing, stirring and oscillating the rock powder and deep undisturbed underground water in the step 2.3 in a conical flask.
7. The experimental method for researching evolution of formation of underground water in deep part of bedrock fracture area according to claim 6, characterized in that: and (3) wrapping the mouth of the conical flask in the step 2.3 by using tinfoil, and sealing by using a high-temperature rubber band.
8. The experimental method for researching evolution of formation of underground water in deep part of bedrock fracture area according to claim 7, wherein: the specific steps of the step 3 are as follows:
step 3.1, cooling the water sample reacted in the step 2.5 to room temperature, and taking the supernatant of the cooled reacted water sample;
and 3.2, centrifuging the supernatant obtained in the step 3.1, storing in a sealed manner, and detecting the chemical components of water, thereby completing the research on the formation and evolution process of deep underground water in the bedrock fracture area.
9. The experimental method for researching evolution of formation of underground water in deep part of bedrock fracture area according to claim 8, wherein: and 3.2, centrifuging the supernatant in the step 3.1 by adopting an SC-3614 low-speed centrifuge.
10. The experimental method for researching evolution of formation of underground water in deep part of bedrock fracture area according to claim 3, characterized in that: and in the step 3.2, the centrifuged supernatant is hermetically stored in a polyethylene sampling bottle.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113686274A (en) * | 2021-08-23 | 2021-11-23 | 重庆交通大学 | Dangerous rock crack water depth measurement method, dangerous rock collapse early warning method and system |
| CN113686274B (en) * | 2021-08-23 | 2024-05-10 | 重庆交通大学 | Dangerous rock crack water depth measurement method, dangerous rock collapse early warning method and system |
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