A field method for measuring the ejection coefficient

Abstract

This invention discloses a field method for measuring the gas ejection coefficient, relating to the field of gas ejection coefficient measurement technology, including the following steps: (1) sampling; (2) sealing the sample with paraffin wax, and then placing the sample inside a lead shell; then placing a rubber tube sealed at one end into the lead shell, with the open end of the rubber tube turned outward and fitted onto the lead tube; (3) holding a gamma radiation meter and extending it into the lead shell along the rubber tube to measure the initial gamma radiation rate Io inside the lead shell; (4) repeating step (3) after an 8-hour interval to measure the gamma radiation rate inside the lead shell; (5) repeating step (4) once; (6) repeating step (3) after an interval of 24 to 48 hours to measure the gamma radiation rate inside the lead shell; (7) repeating step (5) until the gamma radiation rate inside the lead shell reaches saturation, that is, the gamma radiation rate inside the lead shell no longer increases; (8) calculating the gas ejection coefficient. This invention can conveniently and quickly measure the gas ejection coefficient of uranium ore.

Description

Technical Field

[0001] This invention relates to the field of gas ejection coefficient determination technology in uranium deposit resource estimation, and in particular to a field method for determining the gas ejection coefficient. Background Technology

[0002] The ejection coefficient describes the ratio of the amount of gas released into the surrounding space by a solid substance within a certain time interval to the amount of gas formed by the substance in the same time interval. It is usually represented by the symbol η, and its value varies between 0 and 1.

[0003] The gas ejection coefficient of uranium ore (core) refers to the ratio of the amount of gas ejected into the surrounding space by the uranium ore (core) under natural occurrence within a certain time interval to the total amount of gas ejected from the uranium ore during the same time interval. Currently, methods for determining the gas ejection coefficient of uranium ore (core) in the field include the sealed borehole logging method, the sealed plate method, the borehole logging method, the block measurement method, and the laboratory method.

[0004] The sealed borehole logging method and the sealed plate method involve multiple measurements in sealed shallow boreholes or sealed flat blocks at the site of surface uranium ore body radiation sampling, until the gas ejection reaches saturation, and then comparing the results of the last measurement with the first measurement. The borehole logging method involves multiple loggings in a representative borehole in a favorable ore section after the borehole has been drilled and the gas ejection in the borehole has reached saturation, and then comparing the results of the last logging with the first logging. The block determination method can be used when the conditions for determining the gas ejection coefficient in natural occurrence are not available. It involves measuring in a corresponding container, but the container where the sample is placed may not be sealed to the required standard. The laboratory method involves selecting a representative borehole, taking a single core sample or a single grooved sample from the surface, and sending it to the laboratory to determine the gas ejection coefficient using high-purity germanium gamma spectroscopy.

[0005] The sealed borehole logging method and the sealed plate method require opening the borehole opening and sealing the plate area for each measurement, resulting in unsatisfactory measurement results. The borehole logging method is limited by working conditions and has too many influencing factors. In addition, gamma logging of uranium core boreholes is carried out after flushing with clean water, and radon gas will not accumulate in a short time, resulting in unsatisfactory working results. The ore block determination method measures in a corresponding container, but the container where the sample is placed may not be sealed enough or may be poorly designed, making it impossible to determine the gas ejection coefficient in the field. The laboratory method for determining the gas ejection coefficient is even more cumbersome, with many pieces of equipment that are not easy to move. It requires sampling and bringing the sample back to the laboratory for measurement. It can be seen that the existing sealed borehole logging method, sealed plate method, borehole logging method, ore block determination method and laboratory method cannot meet the needs of rapid measurement of gas ejection coefficient in the field. Summary of the Invention

[0006] The purpose of this invention is to provide a field method for measuring the gas ejection coefficient, so as to solve the problems existing in the prior art and facilitate rapid measurement of the gas ejection coefficient in the field.

[0007] To achieve the above objectives, the present invention provides the following solution:

[0008] This invention provides a method for field measurement of the gas ejection coefficient, comprising the following steps:

[0009] (1) Sampling: Core samples are taken from the uranium ore body by drilling or by grooving on the surface. The sample volume should be greater than 5 cm³. 3 The samples may be single or combined.

[0010] (2) The sample is sealed with paraffin wax and then placed in a lead shell; the top surface of the lead shell is provided with an opening, a lead tube is provided at the opening, the bottom end of the lead tube is sealed to the opening, and the top end of the lead tube is provided with a cover, the material of the cover being lead.

[0011] Then, a rubber tube sealed at one end is placed into the lead shell, with the sealed end of the rubber tube located inside the lead shell, and the other end of the rubber tube turned outward so that the outward part of the rubber tube fits onto the lead tube, and the end of the outward part is sealed to the lead shell or the lead tube with tape.

[0012] (3) The gamma radiation meter is inserted into the lead shell along the rubber tube and the initial gamma radiation rate Io inside the lead shell is measured.

[0013] (4) After an 8-hour interval, step (3) is repeated to measure the γ irradiation rate inside the lead shell;

[0014] (5) Repeat step (4) once;

[0015] (6) After an interval of 24 to 48 hours, step (3) is repeated to measure the γ irradiation rate inside the lead shell;

[0016] (7) Repeat step (5) until the gamma irradiation rate inside the lead shell reaches saturation, that is, the gamma irradiation rate inside the lead shell no longer increases.

[0017] (8) The γ-irradiation rate inside the lead shell measured last time is taken as the saturation irradiation rate I∞; the gas ejection coefficient is calculated according to the following formula. Where η is the gas ejection coefficient.

[0018] Preferably, the outer diameter of the rubber tube is equal to the inner diameter of the lead tube.

[0019] Preferably, the diameter of the cover is larger than the diameter of the lead pipe.

[0020] Preferably, the lead shell is rectangular, and each shell wall is made of lead plate, with adjacent shell walls being sealed together.

[0021] Preferably, two adjacent shell walls are bonded together with all-purpose adhesive or connected by solder.

[0022] The present invention achieves the following technical effects compared to the prior art:

[0023] The field method for measuring the gas ejection coefficient of the present invention uses a lead shell with a simple structure and a convenient process, which can conveniently and quickly measure the gas ejection coefficient of uranium ore during field operations. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the lead shell used in the field measurement method of the ejection coefficient of the present invention.

[0026] Figure 2 This is a schematic diagram of the lead shell used in the field measurement method of the ejection coefficient of the present invention.

[0027] Figure 3 for Figure 2 AA section view;

[0028] Figure 4 This is a schematic diagram illustrating the determination of the gamma radiation rate inside the lead shell in the field measurement method of the gas emission coefficient of the present invention.

[0029] Among them, 1. Cover; 2. Lead pipe; 3. Lead shell; 4. Rubber tube; 5. Gamma radiation meter; 6. Sample; 7. Sealing end; 8. Outward-facing part. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] The purpose of this invention is to provide a field method for measuring the gas ejection coefficient, so as to solve the problems existing in the prior art and facilitate rapid measurement of the gas ejection coefficient in the field.

[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] like Figures 1-4 As shown, this embodiment provides a method for field measurement of the gas ejection coefficient, including the following steps:

[0034] (1) Sampling: Drill into the uranium ore body or cut grooves on the surface to collect ore cores as sample 6. The volume of sample 6 should be greater than 5 cm³. 3 It should be noted that, without affecting the gamma radiation meter measurements, sample 6 can be either a single sample or a combination of continuously collected samples.

[0035] (2) Seal the sample 6 with paraffin wax, and then place the sample 6 inside the lead shell 3;

[0036] In this embodiment, the top surface of the lead shell 3 is provided with an opening, and a lead pipe 2 is provided at the opening. The bottom end of the lead pipe 2 is sealed to the opening, and a cover 1 is provided at the top end of the lead pipe 2. The material of the cover 1 is lead.

[0037] Then, a rubber tube 4, sealed at one end, is placed into the lead shell 3. The sealed end 7 of the rubber tube 4 is located inside the lead shell 3, and the other end of the rubber tube 4 is turned outward so that the turned-out portion 8 of the rubber tube 4 fits onto the lead tube 2 (see reference). Figure 4 ), and seal the end of the outward-turned part 8 to the lead shell 3 or lead pipe 2 with tape;

[0038] (3) The operator holds the gamma radiation meter 5 and inserts it into the lead shell 3 along the rubber tube 4 to measure the initial gamma radiation rate Io inside the lead shell 3.

[0039] (4) After an 8-hour interval, step (3) was repeated to measure the γ irradiation rate inside the lead shell 3.

[0040] (5) Repeat step (4) once;

[0041] (6) After an interval of 24 to 48 hours, step (3) was repeated to measure the γ irradiation rate inside the lead shell 3;

[0042] (7) Repeat step (5) until the γ irradiation rate inside the lead shell 3 reaches saturation, that is, the γ irradiation rate inside the lead shell 3 no longer increases.

[0043] (8) The γ irradiation rate inside the lead shell 3 measured last time was taken as the saturation irradiation rate I∞.

[0044] Calculate the injection coefficient using the following formula. Where η is the gas ejection coefficient.

[0045] In this embodiment, the outer diameter of the rubber tube 4 is equal to the inner diameter of the lead tube 2; and the inner diameter of the lead tube 2, the size of the opening, and the inner diameter of the rubber tube 4 must ensure that the operator's hand can hold the gamma radiation meter 5 and insert it into the rubber tube 4. The diameter of the cover 1 is larger than the diameter of the lead tube 2 to ensure a good covering effect.

[0046] The lead shell 3 is rectangular in shape. Each shell wall of the lead shell 3 is made of lead plate. Adjacent shell walls are bonded together with all-purpose adhesive or connected by solder.

[0047] In the description of this invention, it should be noted that the terms "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and 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. Therefore, they should not be construed as limitations on this invention.

[0048] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A method for field determination of the gas ejection coefficient, characterized in that, Includes the following steps: (1) Sampling: Core samples are taken from the uranium ore body by drilling or by grooving on the surface. The sample volume should be greater than 5 cm³. 3 The samples may be single or combined. (2) The sample is sealed with paraffin wax and then placed in a lead shell; the top surface of the lead shell is provided with an opening, a lead tube is provided at the opening, the bottom end of the lead tube is sealed to the opening, and the top end of the lead tube is provided with a cover, the material of the cover being lead. Then, a rubber tube sealed at one end is placed into the lead shell, with the sealed end of the rubber tube located inside the lead shell, and the other end of the rubber tube turned outward so that the outward part of the rubber tube fits onto the lead tube, and the end of the outward part is sealed to the lead shell or the lead tube with tape. (3) The gamma radiation meter is inserted into the lead shell along the rubber tube and the initial gamma radiation rate Io inside the lead shell is measured. (4) After an 8-hour interval, step (3) is repeated to measure the γ irradiation rate inside the lead shell; (5) Repeat step (4) once; (6) After an interval of 24 to 48 hours, step (3) is repeated to measure the γ irradiation rate inside the lead shell; (7) Repeat step (5) until the gamma irradiation rate inside the lead shell reaches saturation, that is, the gamma irradiation rate inside the lead shell no longer increases. (8) The γ irradiation rate inside the lead shell measured last time shall be taken as the saturation irradiation rate I∞; Calculate the injection coefficient using the following formula. Where η is the ejection coefficient.

2. The method for field measurement of the gas ejection coefficient according to claim 1, characterized in that: The outer diameter of the rubber tube is equal to the inner diameter of the lead tube.

3. The method for field measurement of the gas ejection coefficient according to claim 1, characterized in that: The diameter of the cover is larger than the diameter of the lead pipe.

4. The method for field measurement of the gas ejection coefficient according to claim 1, characterized in that: The lead shell is rectangular in shape, and each shell wall is made of lead plate, with adjacent shell walls being sealed together.

5. The method for field determination of the gas ejection coefficient according to claim 4, characterized in that: Adjacent shell walls are bonded together with super glue, or connected by solder.

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