CN113806681A - Rapid RQD analysis method - Google Patents
Rapid RQD analysis method Download PDFInfo
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- CN113806681A CN113806681A CN202111216115.0A CN202111216115A CN113806681A CN 113806681 A CN113806681 A CN 113806681A CN 202111216115 A CN202111216115 A CN 202111216115A CN 113806681 A CN113806681 A CN 113806681A
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
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- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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- G06Q50/02—Agriculture; Fishing; Mining
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/60—Analysis of geometric attributes
- G06T7/62—Analysis of geometric attributes of area, perimeter, diameter or volume
Abstract
The invention discloses a rapid RQD analysis method, which comprises the following steps: placing the rock core into a rock core box for photographing to obtain a rock core picture; importing the shot core picture into image processing software for preprocessing, and converting the core picture into an 8-system image; establishing a scale by utilizing a function of setting the scale in the image processing software, and defining the scale by using the known length in the selected image of the scale; marking the length of each section of core in the 8-system image by using a scribing function in the image processing software; obtaining the length of each section of the core marked by the measuring function in the image processing software; and calculating the RQD value of the rock according to the length of each section of the core obtained by measurement. The analysis method provided by the invention is simple to operate, convenient to use, capable of rapidly performing the logging work of the drill core and accurate and reliable in analysis result. Compared with the prior art, the labor intensity of workers can be greatly reduced, and the working efficiency is improved.
Description
Technical Field
The invention relates to the technical field of mining, in particular to a rapid RQD analysis method.
Background
Before the mine is built, a large amount of exploration work is needed to find out the occurrence conditions of ore bodies, and in addition, the exploration work is also carried out in the production period of the mine so as to discover new mineral resources to ensure the future development of the mine. After the drilling work, the obtained core needs to be subjected to the drilling core logging work, namely RQD grading.
The RQD (Rock Quality indicator) is an important index for evaluating the Quality of Rock, and the index is used for evaluating the Quality of Rock by utilizing the corrected core sampling rate of the drilled hole. Namely, a diamond drill bit with the diameter of 75mm and a double-layer core tube are used for drilling in the rock, the core is continuously cored, the core is drilled in the core in the second time, and the ratio of the sum of the lengths of the core with the length of more than 10cm to the second time footage is expressed by percentage.
At present, manual measurement is usually adopted for logging in the drilling core logging work, and a large number of cores generated by drilling cause heavy work of workers and waste of time and labor. Patent CN 112241711A provides an intelligent method for identifying RQD from a drill core photo, the method identifies single-row core images through a Mask RCNN deep learning network, automatic and rapid recording of the RQD is achieved, workload of workers can be reduced, time is saved, and the method is low in accuracy.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a fast RQD analysis method, which can quickly complete the logging of the drilled core by taking a core picture and analyzing the picture with image processing software, and can solve the problems of high working strength and low working efficiency of the existing manual measurement mode, and the analysis result is accurate and reliable.
To solve the above technical problem, an embodiment of the present invention provides the following solutions:
a rapid RQD analysis method, comprising the steps of:
s1, placing the rock core into a rock core box for photographing to obtain a rock core picture;
s2, importing the shot core picture into image processing software for preprocessing, and converting the core picture into an 8-system image;
s3, establishing a ruler by using a function of setting the ruler in the image processing software, and defining the ruler by using the known length of the selected image of the ruler;
s4, marking the length of each core in the 8-system image by using a scribing function in the image processing software;
s5, obtaining the length of each section of the core of the marked line by using the measurement function in the image processing software;
and S6, calculating the RQD value of the rock according to the length of each section of the core obtained through measurement.
Preferably, in step S1, the photographing tool is any one of a camera, a video camera, and a smart terminal.
Preferably, in step S1, the core box is laid flat when taking a picture, and the lens is taken vertically downward.
Preferably, in step S2, the Image processing software is Image J software or FIJI software.
Preferably, in step S3, a ruler is created by using the Set Scale function of FIJI software, and the ruler is used to select a known core diameter in the map to define the ruler.
Preferably, in the step S4, the length marking of each core section satisfies the following requirements:
for a rock core with a flat section, two ends of the lineation are superposed with two ends of the marked rock core;
for cores with a cross-section of an inclined plane, both the starting end and the ending end are scribed from the midpoint of the inclined plane.
Preferably, in the step S5, the length of each core segment of the scribe line is calculated by using the Measure function of the FIJI software.
Preferably, in step S6, the RQD value is calculated by the following formula:
the technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
the invention provides a rapid RQD analysis method, which is characterized in that a core picture is obtained by photographing, and is imported into image processing software for analysis processing, so that the length of each section of a core can be rapidly measured, and a rock RQD value is calculated. The analysis method provided by the invention is simple to operate, convenient to use, capable of rapidly performing the logging work of the drill core and accurate and reliable in analysis result. Compared with the prior art, the labor intensity of workers can be greatly reduced, the working efficiency is improved, and the labor environment of the workers is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flow chart of a fast RQD analysis method provided by an embodiment of the present invention;
FIG. 2 is a schematic diagram of importing a core picture into FIJI software in an embodiment of the invention;
FIG. 3 is a schematic diagram of the conversion of an imported core picture into an 8-ary image according to an embodiment of the invention;
FIG. 4 is a schematic illustration of establishing a scale in an embodiment of the present invention;
FIG. 5 is a schematic illustration of length marking of sections of core by scoring in an embodiment of the present invention;
FIG. 6 is a schematic diagram of the lengths of the line segments measured according to the embodiment of the present invention;
FIG. 7 is a graph showing the results of the fitting of two methods for the same core.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
An embodiment of the present invention provides a rapid RQD analysis method, as shown in fig. 1, the analysis method including the steps of:
and S1, placing the core into a core box for photographing to obtain a core picture.
In this step, any one of a camera, a video camera and an intelligent terminal (such as a mobile phone and a tablet computer) can be used for shooting the core in the core box to obtain a core picture. In order to ensure the measurement precision, the core box is kept flat when shooting, so that the lens vertically shoots downwards.
And S2, importing the shot core picture into image processing software for preprocessing, and converting the core picture into an 8-system image.
In this step, the Image processing software used may be Image J software, FIJI software, or the like. Taking FIJI software as an example, the process of importing the core picture into the FIJI software is shown in fig. 2, and then the imported core picture is converted into an 8-ary Image through the Image → Type → 8-bit function, as shown in fig. 3.
And S3, establishing a ruler by using a ruler setting function in the image processing software, and defining the ruler by using the known length of the selected image of the ruler.
In this step, as shown in fig. 4, a ruler is created by using the Analyze → Set Scale function of FIJI software, and the ruler is used to select the known core diameter in the drawing to define the ruler.
And S4, marking the length of each core in the 8-system image by using a scribing function in the image processing software.
As shown in fig. 5, the length of the core exceeding 10cm is marked in this step by the Analyze → Tools → ROI Manager function of FIJI software.
Wherein, length marking is carried out to each section of core to satisfy the following requirements:
for a rock core with a flat section, two ends of the lineation are superposed with two ends of the marked rock core;
for cores with a cross-section of an inclined plane, both the starting end and the ending end are scribed from the midpoint of the inclined plane.
And S5, obtaining the length of each section of the core of the marked line by using the measurement function in the image processing software.
In this step, the length of each scribe line segment, i.e., the length of each core segment, is calculated by using the Analyze → Tools → ROI Manager → Measure function of FIJI software, as shown in fig. 6.
And S6, calculating the RQD value of the rock according to the length of each section of the core obtained through measurement.
In this step, the RQD value is calculated by the following formula:
the process of the invention is illustrated in detail below by means of a specific example.
By taking the classification result of the RQD of a certain mine as an embodiment, if the RQD is measured in a classification way by adopting a traditional line measurement method, technicians are required to measure the lengths of the rock cores of which the lengths are more than 10cm by using tape measures respectively in the working process and make related records, so that a great deal of time and labor are consumed.
Table 1 shows the RQD measurements of conventional wireline measurements for a portion of the cores.
TABLE 1
| Drill numbering | Depth of drilling hole is from/m | Depth of drilling hole to/m | Core diameter/mm | RQD/％ |
| ZK02 | 24.41 | 29.10 | 48 | 29.7 |
| ZK02 | 29.10 | 33.88 | 48 | 40.0 |
| ZK02 | 33.88 | 38.80 | 48 | 52.5 |
| ZK02 | 38.80 | 44.00 | 48 | 42.7 |
| ZK02 | 44.00 | 49.10 | 48 | 63.5 |
| ZK02 | 49.10 | 54.10 | 48 | 59.9 |
By using the rapid RQD analysis method provided by the present invention, the results of the measurement grading for the same core are shown in table 2.
TABLE 2
| Drill numbering | Depth of drilling hole is from/m | Depth of drilling hole to/m | Core diameter/mm | RQD/％ |
| ZK02 | 24.41 | 29.10 | 48 | 29.4 |
| ZK02 | 29.10 | 33.88 | 48 | 40.0 |
| ZK02 | 33.88 | 38.80 | 48 | 52.9 |
| ZK02 | 38.80 | 44.00 | 48 | 42.1 |
| ZK02 | 44.00 | 49.10 | 48 | 64.3 |
| ZK02 | 49.10 | 54.10 | 48 | 60.0 |
FIG. 7 is a graph showing the results of the fitting of two methods for the same core. Given the high correlation coefficient of the fit, a t-F test was performed here to further validate the fit. the t test is used to determine the significance of the correlation coefficient (R) and the F test is used to determine the significance of the regression, comparing the t and F values obtained in the two RQD ranking results, respectively. The 95% confidence level is selected in the t-F-test and the proposed method is reliable if the calculated t and F values are larger than the values obtained by table lookup at the 95% confidence level. the results of the t and F tests are shown in table 3. As can be seen from the table, the calculated t value and F value are both larger than those in the table, which indicates that the result of the rapid RQD analysis method provided by the invention is reliable.
TABLE 3
| T value obtained by table lookup | Calculating the obtained t value | F value obtained by table lookup | Calculating the obtained F value |
| ±2.10 | 13.54 | 4.41 | 50.58 |
In summary, the invention provides a rapid RQD analysis method, which obtains a core picture by photographing, imports the core picture into image processing software for analysis processing, can rapidly measure the length of each section of core, and calculates the RQD value of the rock. The analysis method provided by the invention is simple to operate, convenient to use, capable of rapidly performing the logging work of the drill core and accurate and reliable in analysis result. Compared with the prior art, the labor intensity of workers can be greatly reduced, the working efficiency is improved, and the labor environment of the workers is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A rapid RQD analysis method is characterized by comprising the following steps:
s1, placing the rock core into a rock core box for photographing to obtain a rock core picture;
s2, importing the shot core picture into image processing software for preprocessing, and converting the core picture into an 8-system image;
s3, establishing a ruler by using a function of setting the ruler in the image processing software, and defining the ruler by using the known length of the selected image of the ruler;
s4, marking the length of each core in the 8-system image by using a scribing function in the image processing software;
s5, obtaining the length of each section of the core of the marked line by using the measurement function in the image processing software;
and S6, calculating the RQD value of the rock according to the length of each section of the core obtained through measurement.
2. The rapid RQD analysis method of claim 1, wherein in step S1, the photographing tool is any one of a camera, a video camera, and a smart terminal.
3. The rapid RQD analysis method of claim 1 wherein the core box is laid flat with the lens looking vertically downward when taking a picture in step S1.
4. The rapid RQD analysis method of claim 1, wherein in the step S2, the Image processing software employs Image J software or FIJI software.
5. The rapid RQD analysis method of claim 1, wherein in step S3, a ruler is created using the Set Scale function of FIJI software, and is defined by selecting a known core diameter in the graph with the ruler.
6. The rapid RQD analysis method of claim 1, wherein the length marking of each core segment in step S4 satisfies the following requirements:
for a rock core with a flat section, two ends of the lineation are superposed with two ends of the marked rock core;
for cores with a cross-section of an inclined plane, both the starting end and the ending end are scribed from the midpoint of the inclined plane.
7. The rapid RQD analysis method of claim 1, wherein in step S5, the length of each core segment of the scribe line is calculated using the Measure function of FIJI software.
8. The fast RQD analysis method of claim 1, wherein in the step S6, the RQD value is calculated by the following formula:
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| CN116280649A (en) * | 2023-03-28 | 2023-06-23 | 中国电建集团成都勘测设计研究院有限公司 | Core box for measuring core length and method for calculating sampling rate |
| CN117706068A (en) * | 2024-02-06 | 2024-03-15 | 湖南省通盛工程有限公司 | Bridge basement rock RQD determination method, system and storage medium |
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| CN113266337A (en) * | 2021-06-17 | 2021-08-17 | 北京科技大学 | Rock mass quality evaluation method based on ultrasonic drilling imaging technology and fractal method |
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Cited By (3)
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| CN116280649A (en) * | 2023-03-28 | 2023-06-23 | 中国电建集团成都勘测设计研究院有限公司 | Core box for measuring core length and method for calculating sampling rate |
| CN117706068A (en) * | 2024-02-06 | 2024-03-15 | 湖南省通盛工程有限公司 | Bridge basement rock RQD determination method, system and storage medium |
| CN117706068B (en) * | 2024-02-06 | 2024-04-19 | 湖南省通盛工程有限公司 | Bridge basement rock RQD determination method, system and storage medium |
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