阅读说明：本技术 一种盐湖盐矿层孔隙度和给水度样品现场测试方法 (On-site testing method for porosity and water supply degree samples of salt lake salt deposit ) 是由 覃功平 王树龙 宋熙鹏 马学强 曹正伟 于 2021-07-30 设计创作，主要内容包括：本发明提供了一种盐湖盐矿层孔给度样品的孔隙度和给水度参数现场测试方法包括以下步骤：S1、孔给度样品采集；S2、样品体重与湿度测试；S3、孔隙度测试；S4、给水度测试；本发明通过采用本发明方法现场测试盐湖盐矿层孔隙度和给水度,试验装置轻便,测试方法简单,测试速度快,便于勘探现场操作,快速得出测试结果。相较于传统使用烘干机高温烘干样品中的水分,把盐矿结晶水烘掉,导致测试结果不准确的情况,本发明通过使用真空泵,将样品孔隙中的吸附水抽空,不会出现盐矿结晶水被烘干,导致测试结果不准确的情况出现,本发明方法测试操作简单、结果准确性较高、测试参数符合矿层实际。(The invention provides a field test method for porosity and water supply parameters of a salt lake salt deposit pore supply degree sample, which comprises the following steps: s1, collecting a hole density sample; s2, testing the weight and humidity of the sample; s3, testing porosity; s4, testing the water supply degree; the method for testing the porosity and the water supply degree of the salt deposit of the salt lake on site has the advantages of light test device, simple test method, high test speed, convenience for exploration field operation and capability of quickly obtaining a test result. Compared with the traditional method that the moisture in the sample is dried at high temperature by using a dryer, the salt mine crystal water is dried off, and the test result is inaccurate, the vacuum pump is used for evacuating the adsorbed water in the sample pores, the situation that the salt mine crystal water is dried and the test result is inaccurate is avoided, the method is simple in test operation and high in result accuracy, and the test parameters meet the actual condition of the ore bed.)

1. A method for testing the porosity and the water supply degree of a salt lake salt deposit sample on site is characterized by comprising the following steps:

s1, collecting a hole density sample:

in the salt lake exploration drilling construction process, intact rock cores of 10-15Cm are collected from rock cores of a drilling salt deposit to serve as hole giving degree samples, mud skins are peeled off on site, gravity water is drained, oil paper is used for wrapping and wax sealing in time, a site laboratory on the construction site is used for testing parameters of weight, humidity, porosity and water giving degree, and a part of samples are cut from the samples to carry out respective testing on the parameters;

s2, testing weight and humidity of the sample:

1) body weight testing

Measuring in field by plastic packaging drainage method, and cutting sample with volume of 60-120 Cm³；

Firstly, weighing the wet weight of a sample by using balance, namely W1 with the unit of g;

then putting the sample into a thin plastic vacuum bag, pumping out air in the plastic vacuum bag by using a vacuum machine, putting the sample wrapped by the vacuumized plastic bag into a measuring cup filled with brine, putting the sample into the volume of the brine discharged after the sample is put, and subtracting the volume of the plastic bag (the volume is converted by the weight and the density of the plastic bag, and the volume and the weight of the plastic bag can be ignored due to the fact that the plastic bag is very thin and light) to obtain the volume V (cm) of the hole density sample³)；

Dividing the wet weight of the sample by the volume of the sample to obtain the weight XT of the sample;

XT＝W1/V

unit g/cm³Or t/m³；

2) Humidity test

And (3) putting the sample weighed to be wet in an oven, drying the sample at the low temperature of 45 ℃ for 48 hours, and drying the adsorbed water on the surface of the sample, wherein the drying temperature is determined according to the crystal water precipitation temperatures of different salt minerals in the drying process so as to prevent the crystal water from being damaged to influence the test result. After drying, the sample is weighed by a balance to obtain the dry weight W2 of the sample.

The humidity B of the sample was:

B＝((W1-W2)/W1)×100％

s3, porosity test:

1) cutting a complete sample, peeling off mud skin and rock powder, putting the sample in a container, covering a sealing cover, opening a vacuum pump, and sucking adsorbed water in the sample;

2) the sample was then placed in a thin plastic vacuumThe bag is characterized in that air in the plastic vacuum bag is pumped out by a vacuum machine, the sample wrapped by the vacuumized plastic bag is placed in a measuring cup (V) filled with brine, the volume (V1) of the brine discharged after the sample is placed in the measuring cup is subtracted by the volume (V2) of the plastic bag to obtain the volume V3 (cm) of the hole feeding degree sample³)；

V3＝V1-V2

3) Adding brine in the same mining area as the sample in a container, wherein the amount of the brine is proper to submerge the height of the sample, recording the volume (V4) of the brine in the container, placing the test sample obtained after tearing off the vacuum package into the brine, placing for 5-10 minutes to allow the brine to fully permeate into sample pores, recording the volume (V5) of the brine in the container after placing the sample, and calculating to obtain the volume (V6) of the pores in the sample:

V6＝V3-V5(cm³)

the sample porosity (K) is:

K＝(V6/V3)×100％

s4, testing the water supply degree:

after the porosity test is finished, a sealing cover of the container is closed, a vacuum pump is opened, brine in the container is pumped out, the volume (V7) of the pumped brine is measured, and the volume (V3) of the sample is divided to obtain the water supply degree (G) of the sample;

G＝((V4-V7)/V3)×100％。

2. the on-site testing method for porosity and feedwater degree samples of salt lake salt deposits of claim 1, wherein: in the step S1, intact cores of 10-15Cm are collected from the cores of the salt deposit of the exploration drilling hole as hole density samples, the mud skin is peeled off on site, the gravity water is drained, and the cores are wrapped by tissue paper and sealed by wax in time. The sample is cut into 2-3 column test samples in a field laboratory for classification test.

3. The on-site testing method for porosity and feedwater degree samples of salt lake salt deposits according to claim 2, wherein: placing the columnar test rock on an electronic balance, and removing powder scraps on the columnar test sample before weighing and recording; the weight test is generally carried out in the field by using a plastic package drainage methodThe volume of the cut sample is 60-120 Cm³(ii) a The wet weight of the sample was first weighed using a balance, namely W1 in g.

4. The on-site testing method for porosity and feedwater degree samples of salt lake salt deposits according to claim 3, wherein: before the weighing treatment of the columnar test sample, the water in the sample is pumped out through a vacuum pump, and the adsorbed water in the sample is drained as much as possible.

5. The on-site testing method for porosity and feedwater degree samples of salt lake salt deposits of claim 1, wherein: in the step S3, the sample is placed in a thin plastic vacuum bag, air in the plastic vacuum bag is evacuated by a vacuum machine, the sample wrapped in the evacuated plastic bag is placed in a measuring cup filled with brine, the volume of the brine discharged after the sample is placed in the measuring cup, and the volume of the brine discharged after the sample is subtracted from the volume of the plastic bag, so that the volume V (cm) of the hole feeding sample is obtained³)。

6. The on-site testing method for porosity and feedwater degree samples of salt lake salt deposits according to claim 4, wherein: adding brine in the same mining area as the sample into a container, recording the volume (V1) of the brine in the container, placing the test sample after tearing off the vacuum package into the brine, placing for 5 minutes to allow the brine to fully permeate into sample pores, recording the volume (V2) of the brine in the container after placing the sample, and calculating to obtain the volume (V3) of the pores in the sample.

7. The on-site testing method for porosity and feedwater degree samples of salt lake salt deposits of claim 1, wherein: and after the porosity test is finished, covering a sealing cover of the container, opening a vacuum pump, draining the brine in the container, measuring the volume (V7) of the drained brine, subtracting the total amount (V7) of the drained brine from the total amount (V4) of the water in the container, and dividing by the volume (V3) of the sample to obtain the water supply degree (G) of the sample.

8. The application of the on-site testing method for the porosity and the water supply degree of the salt lake salt deposit is characterized in that: when the porosity and the water supply degree of a salt mine pore water supply degree sample are tested, before testing, a vacuum pump is used for draining adsorbed water in the sample as much as possible, brine which is injected into the sample and a mine area is used for testing the porosity, after the porosity is tested, the brine in the sample is also drained as much as possible by the vacuum pump, and the water supply degree is calculated; in the whole testing process of porosity and water supply degree, the water holding degree of the sample is basically consistent before and after the test, a constant is kept, the test result is directly the porosity and the water supply degree, the water holding degree is not directly tested, and the water holding degree is obtained by subtracting the water supply degree from the porosity.

Technical Field

The invention relates to the technical field of testing the porosity and the water supply degree of a salt lake salt deposit, in particular to a field testing method for a porosity and water supply degree sample of the salt lake salt deposit.

Background

The water feed is the ratio of the amount of water drained by a saturated soil or rock formation under the action of gravity to the volume of the soil or rock formation. It is numerically equal to the porosity minus the water holding capacity.

Porosity refers to the sum of the gas-permeable pores and the water-retaining pores in the matrix, expressed as a percentage of the pore volume to the total volume of the matrix.

The existing method for testing the porosity and the water supply degree of the salt deposit of the salt lake is carried out in a laboratory, kerosene is generally used as a reagent, brine is also used, the reagent and the brine are dried by a dryer at high temperature, the water retention degree and the water supply degree are firstly tested, and then the porosity is inversely calculated by the water retention degree and the water supply degree. Part of salt minerals contain crystal water, the crystal water content is different among different mineral types, and the water loss temperature is different among different salt minerals. Temperature when the sample is dried is difficult to control, salt mine crystal water can be dried off when the sample is dried, the result of the tested water retention is inaccurate, meanwhile, the total porosity is always measured by the conventional porosity testing method, the conventional total porosity measuring method has the defects of complicated steps, long sample drying time, and the water retention of the crystal water needs to be calculated reversely, so that the testing efficiency and the testing precision are reduced, and the testing parameters are often deviated from the actual condition and cannot be used.

Therefore, the method for simply and directly testing the effective porosity and the water supply degree on site by using the hole supply degree sample of the salt lake salt deposit is provided, and the water holding degree of the sample is not tested and calculated.

Disclosure of Invention

In view of the above, embodiments of the present invention are intended to provide a method for on-site testing porosity and water supply parameters of a salt lake salt deposit porosity sample, so as to solve or alleviate the technical problems in the prior art, and to provide at least one useful choice.

The technical scheme of the embodiment of the invention is realized as follows: a method for testing porosity and water supply parameters of a salt lake salt deposit pore supply sample on site comprises the following steps:

s1, collecting a hole density sample:

in the salt lake exploration drilling construction process, intact rock cores of 10-15Cm are collected from rock cores of a salt deposit to be drilled and used as hole feeding degree samples, mud skins are peeled off on site, gravity water is drained, oil paper is used for wrapping in time and sealing with wax, a site laboratory on a construction site tests weight (namely density), humidity, porosity and water feeding degree parameters, and a part of samples are cut from the samples to carry out respective tests on the parameters.

S2, sample weight (i.e. density), moisture test:

1) body weight (i.e. density) test

The measurement is carried out in the field by a plastic packaging drainage method (vacuum pumping after being sealed by a plastic bag), and the volume of a cut sample is 60-120 Cm³。

The wet weight of the sample was first weighed using a balance, namely W1 in g.

Then putting the sample into a thin plastic vacuum bag, pumping out air in the plastic vacuum bag by using a vacuum machine, putting the sample wrapped by the vacuumized plastic bag into a measuring cup filled with brine, putting the sample into the volume of the brine discharged after the sample is put, and subtracting the volume of the plastic bag (the volume is converted by the weight and the density of the plastic bag, and the volume and the weight of the plastic bag can be ignored due to the fact that the plastic bag is very thin and light) to obtain the volume V (cm) of the hole density sample³)。

The wet weight of the sample divided by the volume of the sample is the body weight (i.e., density) XT of the sample.

XT＝W1/V

Unit g/cm³Or t/m³。

2) Humidity test

And (3) putting the sample weighed to be wet in an oven, drying the sample at the low temperature of 45 ℃ for 48 hours, and drying the adsorbed water on the surface of the sample, wherein the drying temperature is determined according to the crystal water precipitation temperatures of different salt minerals in the drying process so as to prevent the crystal water from being damaged to influence the test result. After drying, the sample is weighed by a balance to obtain the dry weight W2 of the sample.

The humidity B of the sample was:

B＝((W1-W2)/W1)×100％

s3, porosity test:

1) cutting a complete sample, peeling off mud skin and rock powder, putting the sample in a container, covering a sealing cover, opening a vacuum pump, and sucking adsorbed water in the sample.

2) Then putting the sample into a thin plastic vacuum bag, pumping out air in the plastic vacuum bag by using a vacuum machine, putting the sample wrapped by the vacuumized plastic bag into a measuring cup (V) filled with brine, putting the sample into the measuring cup (V1), and subtracting the volume (V2) of the plastic bag (the volume is converted by the weight and the density of the plastic bag, and the volume and the weight of the plastic bag can be ignored) to obtain the volume V3 (cm) of the hole feeding sample³)。

V3＝V1-V2

3) Adding brine in the same mining area as the sample in a container, wherein the amount of the brine is proper to submerge the height of the sample, recording the volume (V4) of the brine in the container, placing the test sample obtained after tearing off the vacuum package into the brine, placing for 5-10 minutes to allow the brine to fully permeate into sample pores, recording the volume (V5) of the brine in the container after placing the sample, and calculating to obtain the volume (V6) of the pores in the sample:

V6＝V3-V5(cm³)

the sample porosity (K) is:

K＝(V6/V3)×100％

s4, testing the water supply degree:

and after the porosity test is finished, the sealing cover of the container is closed, the vacuum pump is opened, the brine in the container is pumped out, the volume (V7) of the pumped brine is measured, and the volume (V3) of the sample is divided to obtain the water supply degree (G) of the sample.

G＝((V4-V7)/V3)×100％

Preferably: in the step S1, intact cores of 10-15Cm are collected from the cores of the salt deposit of the exploration drilling hole as hole density samples, the mud skin is peeled off on site, the gravity water is drained, and the cores are wrapped by tissue paper and sealed by wax in time. The sample is cut into 2-3 column test samples in a field laboratory for classification test.

Preferably: and putting the columnar test rock on an electronic balance, and removing powder scraps on the columnar test sample before weighing and recording. The weight (density) is measured in the field by plastic-sealed drainage method (vacuum pumping after sealing with plastic bag), and the cut sample volume is 60-120 Cm³. The wet weight of the sample was first weighed using a balance, namely W1 in g.

Preferably: before the weighing treatment of the columnar test sample, the water in the sample is pumped out through a vacuum pump, and the adsorbed water in the sample is drained as much as possible.

Preferably: in S3, the sample is placed in a thin plastic vacuum bag, air in the plastic vacuum bag is evacuated by a vacuum machine, the sample wrapped in a vacuum bag is placed in a measuring cup filled with brine, the volume of the brine discharged after the sample is placed in the measuring cup is subtracted from the volume of the plastic bag (the volume is calculated by using the weight and density of the plastic bag, and the volume and weight of the plastic bag can be ignored due to the thinness and lightness of the plastic bag), and the volume V (cm) of the hole density sample is obtained³)。

Preferably: adding brine in the same mining area as the sample into a container, recording the volume (V1) of the brine in the container, placing the test sample after tearing off the vacuum package into the brine, placing for 5 minutes to allow the brine to fully permeate into sample pores, recording the volume (V2) of the brine in the container after placing the sample, and calculating to obtain the volume (V3) of the pores in the sample.

Preferably: and after the porosity test is finished, a sealing cover of the container is closed, a vacuum pump is opened, brine in the container is drained, the volume (V7) of the drained brine is measured, the total amount (V7) of the drained brine is subtracted from the total amount (V4) of the water in the container, and the total amount is divided by the volume (V3) of the sample, so that the water supply degree (G) of the sample is obtained.

When the method is used for testing the porosity and the water supply degree of a salt lake salt deposit sample, a vacuum pump is used for draining adsorbed water in the sample as much as possible before testing, brine injected into the sample and a mining area is used for testing the porosity, the brine in the sample is also drained as much as possible after the porosity is tested, and the water supply degree is calculated. In the whole testing process of porosity and water supply degree, the water holding degree of the sample is basically consistent before and after the test, a constant is kept, the test result is directly the porosity and the water supply degree, the water holding degree is not directly tested, and the water holding degree is obtained by subtracting the water supply degree from the porosity.

Due to the adoption of the technical scheme, the embodiment of the invention has the following advantages:

firstly, the porosity and the water supply degree of the salt deposit of the salt lake are tested by adopting the method, the testing method is simple, compared with the traditional method that a dryer is used for drying the moisture in the sample at a high temperature and drying the salt deposit crystal water, the condition that the testing result is inaccurate is caused, the vacuum pump is used for evacuating the moisture in the sample, the condition that the salt deposit crystal water is dried and the testing result is inaccurate is avoided, the testing result accuracy of the method is high, and the method is more in line with the actual parameters of the deposit;

the invention can test the weight and humidity of the sample at the same time.

And thirdly, the columnar test sample is vacuumized by using a plastic vacuum bag, the sample is placed in a measuring cup for holding brine, the sample volume is measured, the brine is filled into sample pores, the porosity can be directly calculated, the water retention is not directly tested, the brine in the porosity is discharged by using a vacuum pump, the water supply is calculated, and the test result is closer to the actual value of the ore bed.

The foregoing summary is provided for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will be readily apparent by reference to the drawings and following detailed description.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments or technical descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a test flow diagram of the method of the present invention;

FIG. 2 is a schematic diagram of an apparatus used in the testing method of the present invention.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Example one

As shown in fig. 1-2, the embodiment of the present invention provides an on-site testing method for porosity and water supply of salt lake salt deposit, comprising the following steps:

s1, collecting a hole density sample:

in the salt lake exploration drilling construction process, intact rock cores of 10-15Cm are collected from rock cores of a salt deposit to be drilled and used as hole feeding degree samples, mud skins are peeled off on site, gravity water is drained, oil paper is used for wrapping in time and sealing with wax, a site laboratory on a construction site tests weight (namely density), humidity, porosity and water feeding degree parameters, and a part of samples are cut from the samples to carry out respective tests on the parameters.

S2, sample weight (i.e. density), moisture test:

1) body weight (i.e. density) test

The measurement is carried out in the field by a plastic packaging drainage method (vacuum pumping after being sealed by a plastic bag), and the volume of a cut sample is 60-120 Cm³。

The wet weight of the sample was first weighed using a balance, namely W1 in g.

Then putting the sample into a thin plastic vacuum bag, pumping out air in the plastic vacuum bag by using a vacuum machine, putting the sample wrapped by the vacuumized plastic bag into a measuring cup filled with brine, putting the sample into the volume of the brine discharged after the sample is put, and subtracting the volume of the plastic bag (the volume is converted by the weight and the density of the plastic bag, and the volume and the weight of the plastic bag can be ignored due to the fact that the plastic bag is very thin and light) to obtain the volume V (cm) of the hole density sample³)。

The wet weight of the sample divided by the volume of the sample is the body weight (i.e., density) XT of the sample.

XT＝W1/V

Unit g/cm³Or t/m³。

2) Humidity test

And (3) putting the sample weighed to be wet in an oven, drying the sample at the low temperature of 45 ℃ for 48 hours, and drying the adsorbed water on the surface of the sample, wherein the drying temperature is determined according to the crystal water precipitation temperatures of different salt minerals in the drying process so as to prevent the crystal water from being damaged to influence the test result. After drying, the sample is weighed by a balance to obtain the dry weight W2 of the sample.

The humidity B of the sample was:

B＝((W1-W2)/W1)×100％

s3, porosity test:

1) cutting a complete sample, peeling off mud skin and rock powder, putting the sample in a container, covering a sealing cover, opening a vacuum pump, and sucking adsorbed water in the sample.

2) Then putting the sample into a thin plastic vacuum bag, pumping out air in the plastic vacuum bag by using a vacuum machine, putting the sample wrapped by the vacuumized plastic bag into a measuring cup (V) filled with brine, putting the sample into the measuring cup (V1), and subtracting the volume (V2) of the plastic bag (the volume is converted by the weight and the density of the plastic bag, and the volume and the weight of the plastic bag can be ignored) to obtain the volume V3 (cm) of the hole feeding sample³)。

V3＝V1-V2

3) Adding brine in the same mining area as the sample in a container, wherein the amount of the brine is proper to submerge the height of the sample, recording the volume (V4) of the brine in the container, placing the test sample obtained after tearing off the vacuum package into the brine, placing for 5-10 minutes to allow the brine to fully permeate into sample pores, recording the volume (V5) of the brine in the container after placing the sample, and calculating to obtain the volume (V6) of the pores in the sample:

V6＝V3-V5(cm³)

the sample porosity (K) is:

K＝(V6/V3)×100％

s4, testing the water supply degree:

and after the porosity test is finished, the sealing cover of the container is closed, the vacuum pump is opened, the brine in the container is pumped out, the volume (V7) of the pumped brine is measured, and the volume (V3) of the sample is divided to obtain the water supply degree (G) of the sample.

G＝((V4-V7)/V3)×100％

In one embodiment, in S1, the number of the salt lake salt deposit columnar test rocks is 2-3, and 2-3 columnar test samples are used for simultaneously carrying out classification test on each parameter to ensure the test accuracy.

In one embodiment, the columnar test rock is placed on an electronic balance, and before weighing and recording, powder scraps on the columnar test rock are removed, so that the test accuracy is ensured.

In one embodiment, after the undisturbed test sample is processed, the moisture in the sample is evacuated by a vacuum pump.

In one embodiment, in S3, the measuring cup is left for 5-10min after injecting brine into the same hole or adjacent to the columnar test rock.

In one embodiment, besides the brine injected into the measuring cup, the measuring cup can also be used for kerosene, so that the test diversity is improved.

Experimental example 1

The invention also provides an experimental example for testing the water supply degree and the porosity of the ore by adopting the method of the invention:

taking a columnar hole density sample of a rock salt ore bed of a certain salt lake, and removing the columnar holeAfter weighing the powder scraps on the sample, evacuating the adsorbed water in the sample by a vacuum pump, putting the sample on an electronic balance, weighing the sample to 261g before drying, pouring the water into a measuring cup after the sample is subjected to straight empty plastic packaging, and recording the volume to be 300Cm³Then the sample is immersed in the container brine, and the volume of the overflowed brine is measured to be 145Cm³I.e. the volume 145Cm of the sample³(ii) a The sample was then dried in an oven at 45 ℃ for 48 hours to give a dry weight of 245 g.

The weight of the sample was 1.80g/m³The sample humidity was 6.13%;

the water was poured into a measuring cup and the volume recorded was 300Cm³Cutting a sample, packaging with plastic vacuum bag, vacuumizing, placing the vacuum-packaged sample in a measuring cup, and recording the volume of the overflowing brine as 100Cm³I.e. the volume of the sample is 100Cm³Pouring the discharged brine into the container, tearing the plastic bag, putting the sample into the brine in the container, and measuring the volume of the discharged brine to be 80Cm³. The porosity of the sample was calculated as:

pore volume of 100-80-20 Cm³

Porosity (20/100) × 100%

After the porosity test is finished, the sealing cover of the container is covered, the vacuum pump is opened, brine in the container is pumped out, and the volume 190Cm of the pumped brine is measured³Divided by the volume of the sample 100Cm³And obtaining the water supply degree (G) of the sample.

G＝(200-190)/100×100％＝10％

Experimental example two

The invention also provides an experimental example for testing the water supply degree and the porosity of the ore by adopting the method of the invention:

taking a columnar hole feeding sample of a rock salt ore bed of a certain salt lake, removing powder scraps on the columnar hole feeding sample, evacuating adsorbed water in the sample through a vacuum pump, putting the sample on an electronic balance, weighing the wet weight of the sample to be 280g before drying, pouring the water into a measuring cup after the sample is subjected to straight empty plastic packaging, and recording the volume of the sample to be 300Cm³Then the sample is immersed into the container brine, and the overflow brine is measuredHas a volume of 150Cm³I.e. a volume of 150Cm of sample³(ii) a The dry weight of the sample after the sample was further dried in an oven at a low temperature of 45 ℃ for 48 hours was 265 g.

The weight of the sample was 1.87g/m³Sample humidity was 5.36%;

the water was poured into a measuring cup and the volume recorded was 300Cm³Cutting a sample, packaging with plastic vacuum bag, vacuumizing, placing the vacuum-packaged sample in a measuring cup, and recording the volume 180Cm of the overflowing brine³I.e. a volume of 180Cm of the sample³Pouring the discharged brine into the container, tearing the plastic bag, putting the sample into the brine in the container, and measuring the volume of the discharged brine to be 155Cm³. The porosity of the sample was calculated as:

pore volume 180-³

Porosity 25/180 × 100%

After the porosity test is finished, the sealing cover of the container is covered, the vacuum pump is opened, brine in the container is pumped out, and the volume 280Cm of pumped brine is measured³Divided by the volume of the sample 180Cm³And obtaining the water supply degree (G) of the sample.

G＝(300-280)/180×100％＝11.10％

Experimental example III

The invention also provides an experimental example for testing the water supply degree and the porosity of the ore by adopting the method of the invention:

taking a columnar hole feeding sample of a rock salt ore bed of a certain salt lake, removing powder scraps on the columnar hole feeding sample, evacuating adsorbed water in the sample through a vacuum pump, putting the sample on an electronic balance, weighing 275g of wet weight before drying, pouring the water into a measuring cup after the sample is directly subjected to plastic packaging, and recording the volume of the measuring cup to be 300Cm³Then the sample is immersed in the container brine, and the volume of the overflowed brine is measured to be 165Cm³I.e. the volume 165Cm of the sample³(ii) a The dry weight of the sample after the sample was further dried in an oven at a low temperature of 45 ℃ for 48 hours was 265 g.

The weight of the sample was 1.67g/m³The sample humidity was 3.63%;

the water was poured into a measuring cup and the volume recorded was 300Cm³Cutting a sample, packaging with plastic vacuum bag, vacuumizing, placing the vacuum-packaged sample in measuring cup, and recording the volume 165Cm of the overflowing brine³I.e. the volume 165Cm of the sample³Pouring the discharged brine into the container, tearing the plastic bag, putting the sample into the brine in the container, and measuring the volume of the discharged brine to be 135Cm³. The porosity of the sample was calculated as:

pore volume 165-³

Porosity 30/165 × 100%

After the porosity test is finished, the sealing cover of the container is covered, the vacuum pump is opened, brine in the container is pumped out, and the volume 280Cm of pumped brine is measured³Divided by the volume of the sample 180Cm³And obtaining the water supply degree (G) of the sample.

G＝(300-280)/165×100％＝12.11％

Experimental example four

The invention also provides an experimental example for testing the water supply degree and the porosity of the ore by adopting the method of the invention:

taking a columnar hole feeding sample of a rock salt ore bed of a certain salt lake, removing powder scraps on the columnar hole feeding sample, evacuating adsorbed water in the sample through a vacuum pump, putting the sample on an electronic balance, weighing the sample to be 255g in wet weight before drying, pouring the water into a measuring cup after the sample is subjected to empty plastic packaging, and recording the volume to be 300Cm³Then the sample is immersed into the container brine, and the volume of the overflowed brine is measured to be 140Cm³I.e. the volume 140Cm of the sample³(ii) a The dry weight of the sample after the sample was further dried in an oven at a low temperature of 45 ℃ for 48 hours was 235 g.

The weight of the sample was 1.82g/m³Sample humidity was 7.84%;

the water was poured into a measuring cup and the volume recorded was 300Cm³Cutting a sample, packaging with plastic vacuum bag, vacuumizing, placing the vacuum-packaged sample in measuring cup, and recording the volume 160Cm of the overflow bittern³I.e. the volume 160Cm of the sample³Pouring the discharged brine into the container, tearing the plastic bag, putting the sample into the brine in the container, and measuring the volume of the discharged brine to be 128Cm³. The porosity of the sample was calculated as:

pore volume 160-³

Porosity of 32/160 × 100%

After the porosity test is finished, the sealing cover of the container is covered, the vacuum pump is opened, brine in the container is pumped out, and the volume 285Cm of pumped brine is measured³Divided by the volume of the sample 160Cm³And obtaining the water supply degree (G) of the sample.

G＝(300-285)/165×100％＝9.09％

According to the experimental data, the porosity and the water supply degree of the salt lake salt deposit layer are tested by the method, the porosity value of a sample with 4 holes in a certain salt lake ore tested by the method is 18-20%, and the water supply degree value is 9-12%, the testing method is simple, compared with the situation that the traditional dryer is used for drying the water in the sample at high temperature, the salt mine crystal water is dried, and the testing result is inaccurate, the vacuum pump is used for pumping out the adsorbed water in the sample, and the phenomenon that the salt mine crystal water is dried cannot occur, so that the testing result accuracy of the method is high.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various changes or substitutions within the technical scope of the present invention, and these should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.