A high-precision drilling arrangement method

Abstract

The present invention relates to the technical field of coal resource exploration, and provides a high-precision drilling arrangement method, comprising the following steps: determining an exploration area, and arranging parallel exploration lines in the exploration area according to a preset spacing; arranging boreholes on each exploration line according to the set spacing, demarcating a first range with adjacent exploration lines and the boreholes closest to the adjacent exploration lines, and obtaining a first control level of resource volume according to the first range; demarcating a second range with each borehole as the center of a circle and the influence distance of each borehole as the diameter, and adjacent second ranges intersecting or tangent to each other, and obtaining a second control level of resource volume according to the second range. In this way, the resource volume of the first control level and the resource volume of the second control level are equivalent in control accuracy, and can be verified with each other, which effectively reduces the influence of external factors on the evaluation results, improves the estimation accuracy, and does not need to verify the data by re-drilling, shortens the exploration cycle, and saves construction costs.

Description

Technical Field

[0001] The invention relates to the technical field of coal resource exploration, and in particular to a high-precision drilling arrangement method. Background Art

[0002] With the growth of global energy demand, coal, as one of the important energy resources, occupies an indispensable position in the energy structure. Accurate assessment of coal reserves is of great significance for rational planning of coal mining activities and ensuring energy supply security. At present, drilling exploration is still the main means of assessing coal reserves.

[0003] In the relevant technology, there are generally two ways to arrange drilling holes in the process of coal exploration: first, exploration lines are arranged at a certain engineering spacing according to different geological conditions, and drill holes are arranged on the exploration lines. The range enclosed by adjacent exploration lines and drill holes represents the resource volume with a certain accuracy; second, no exploration lines are set, but the range enclosed by the influence distance of each drill hole represents a certain accuracy.

[0004] Although the above two drilling arrangements can meet the needs of resource assessment to a certain extent, their limitations are also obvious. For example, due to the influence of complex geological conditions and other factors, the assessment results may not be accurate enough and cannot meet the requirements of exploration accuracy. At this time, re-drilling is required to verify the data, which prolongs the exploration cycle and increases construction costs. Summary of the invention

[0005] The present invention provides a high-precision drilling arrangement method to solve the defects of the drilling arrangement method in the prior art, such as large limitations, difficulty in meeting the exploration accuracy requirements, long exploration cycle and high construction cost. The method can improve the exploration accuracy, shorten the exploration cycle and save construction costs.

[0006] The present invention provides a high-precision drilling arrangement method, comprising the following steps: Determining an exploration area, and arranging parallel exploration lines in the exploration area at preset intervals; Arranging drill holes on each of the exploration lines at a set interval, defining a first range by using adjacent exploration lines and the drill holes closest to the adjacent exploration lines, and obtaining a first controlled level of resource volume according to the first range; A second range is defined with each of the boreholes as the center and the influence distance of each of the boreholes as the diameter. Adjacent second ranges intersect or are tangent to each other, and the resource volume of the second control level is obtained according to the second ranges.

[0007] According to a high-precision drilling arrangement method provided by the present invention, the exploration line is perpendicular to the direction of the ore body.

[0008] According to a high-precision drilling arrangement method provided by the present invention, adjacent exploration lines are arranged at equal intervals.

[0009] According to a high-precision drilling arrangement method provided by the present invention, the drilling holes on the same exploration line are arranged at equal intervals.

[0010] According to a high-precision drilling arrangement method provided by the present invention, the drill holes on adjacent exploration lines are arranged in a staggered manner.

[0011] According to a high-precision drilling arrangement method provided by the present invention, the set spacing is no greater than the preset spacing.

[0012] According to a high-precision drilling arrangement method provided by the present invention, the preset spacing, the set spacing and the influence distance satisfy the following formula: ; Among them, a is the preset spacing; b is the set spacing; c is the influence distance of a single borehole; n is the number of divisions of the set spacing b between adjacent boreholes on the adjacent exploration line, where a perpendicular line is drawn from the borehole to the adjacent exploration line.

[0013] According to a high-precision drilling arrangement method provided by the present invention, a perpendicular line is drawn from the borehole to the adjacent exploration line, and the foot of the perpendicular line is located at the midpoint of the adjacent borehole on the adjacent exploration line.

[0014] According to a high-precision drilling arrangement method provided by the present invention, the preset spacing is equal to the set spacing.

[0015] According to a high-precision drilling arrangement method provided by the present invention, the preset spacing a, the set spacing b and the influence distance c satisfy the following formula: .

[0016] The high-precision drilling arrangement method provided by the present invention can enclose a first range through adjacent exploration lines and the nearest boreholes on the adjacent exploration lines, thereby obtaining a resource volume of a first control level based on the first range. At the same time, a second range can be enclosed through the influence distance of each borehole, and a resource volume of a second control level is obtained through the second range. According to the drilling arrangement method, the resource volume of the first control level and the resource volume of the second control level are equivalent in control accuracy and can verify each other, effectively reducing the influence of external factors on the evaluation results, improving the estimation accuracy, and eliminating the need to verify the data through re-drilling, thereby shortening the exploration cycle and saving construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a flow chart of a high-precision drilling arrangement method provided in an embodiment of the present invention.

[0019] Figure 2 It is a plan view of the drilling arrangement provided by an embodiment of the present invention.

[0020] Figure 3 is a cross-sectional view of a drilling arrangement provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the embodiments of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left” and “right” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the embodiments of the present invention.

[0023] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0024] In order to facilitate the understanding of the high-precision drilling arrangement method provided by the present invention, its application background is first introduced. Coal is an important component of the energy structure. Accurate assessment of coal resource reserves is of great significance for the rational planning of coal mining activities and ensuring the security of energy supply. At present, drilling exploration is still the main means of assessing coal resource reserves.

[0025] In the relevant technology, there are generally two ways to arrange drilling holes in the process of coal exploration: first, exploration lines are arranged at a certain engineering spacing according to different geological conditions, and drill holes are arranged on the exploration lines. The range enclosed by adjacent exploration lines and drill holes represents the resource volume with a certain accuracy; second, no exploration lines are set, but the range enclosed by the influence distance of each drill hole represents a certain accuracy.

[0026] Although the above two drilling arrangements can meet the needs of resource assessment to a certain extent, their limitations are also obvious. For example, due to the influence of complex geological conditions and other factors, the assessment results may not be accurate enough and cannot meet the requirements of exploration accuracy. At this time, re-drilling is required to verify the data, which prolongs the exploration cycle and increases construction costs.

[0027] Therefore, in order to solve the above technical problems, the present invention provides a high-precision drilling arrangement method, which can improve exploration accuracy, shorten the exploration period, and save construction costs.

[0028] Combine the following Figure 1-Figure 3 The high precision drilling arrangement method of the present invention is described.

[0029] Figure 1 Schematic diagram of the process of high-precision drilling arrangement method provided by the present invention, such as Figure 1 As shown, the method comprises the following steps: Step 100: determine an exploration area, and arrange parallel exploration lines in the exploration area at a preset interval.

[0030] Step 101: Arrange drill holes on each exploration line according to a set interval, define a first range by using adjacent exploration lines and the drill holes closest to the adjacent exploration lines, and obtain a first controlled level of resource volume based on the first range.

[0031] Step 102: With each borehole as the center and the influence distance of each borehole as the diameter, a second range is defined, and adjacent second ranges intersect or are tangent to each other, and the resource volume of the second control level is obtained according to the second ranges.

[0032] In the above technical solution, the first range can be enclosed by adjacent exploration lines and the nearest boreholes on the adjacent exploration lines, so that the resource volume of the first control level can be obtained according to the first range. At the same time, the second range can be enclosed by the influence distance of each borehole, and the resource volume of the second control level can be obtained through the second range. According to the drilling arrangement method, the resource volume of the first control level and the resource volume of the second control level are equivalent in control accuracy and can be verified with each other, which effectively reduces the influence of external factors on the evaluation results, improves the estimation accuracy, and does not need to verify the data by re-drilling, shortens the exploration cycle, and saves construction costs.

[0033] Specifically, in geological exploration, determining the exploration area and arranging the exploration line is a basic and important task, the purpose of which is to reveal the morphology, scale, occurrence, grade and reserves of the ore body, and provide a scientific basis for the exploitation of the ore deposit. The determination of the exploration area first requires the collection and analysis of geological data. Through the analysis of geological data, we can have a preliminary understanding of the geological characteristics and mineral distribution of the target area, determine the main direction and objectives of the exploration, predict the possible types, scales and distribution characteristics of the ore deposits, and provide guidance for the layout of the exploration line.

[0034] The layout of exploration lines should follow factors such as geological structure, mineral distribution, topography and landforms, so as to systematically arrange exploration lines and more accurately understand the underground geological structure and distribution of mineral resources. The selection of exploration lines should be based on geological conditions and choose appropriate exploration line types, such as longitudinal exploration lines, horizontal exploration lines or oblique exploration lines.

[0035] In one embodiment of the present invention, in order to more effectively control and evaluate the ore body and improve the accuracy and efficiency of exploration, the exploration line is perpendicular to the direction of the ore body. The specific length of the exploration line can be determined according to the geological conditions, but it is necessary to ensure that the exploration line cuts through the ore body in the thickness direction.

[0036] In one embodiment of the present invention, the exploration lines are arranged at equal intervals. The equally spaced exploration lines can ensure that the data acquired in the entire exploration area is evenly distributed, avoiding the situation where the data in some areas are too dense and the data in other areas are sparse due to uneven spacing, which helps to more comprehensively reflect the actual situation of underground structure or resource distribution and reduce data deviations caused by human factors or natural conditions.

[0037] The spacing between adjacent exploration lines can be set according to actual engineering requirements, such as the complexity of the exploration area. Specifically, if the complexity of the coal exploration area is medium, the spacing between adjacent exploration lines is not greater than 500 meters. If the complexity of the coal exploration area is not medium, the spacing between adjacent exploration lines can be greater or less than 500 meters. In other words, the spacing between exploration lines may vary according to different actual engineering requirements. Therefore, in the embodiment of the present invention, no specific limitation is imposed on the spacing between adjacent exploration lines.

[0038] In one embodiment of the present invention, the boreholes on the same exploration line are arranged at equal intervals, so that the efficiency of drilling work and the accuracy of exploration work can be improved, and the waste of resources caused by blind drilling can be reduced to achieve the best exploration effect. The spacing between adjacent boreholes on the same exploration line can be set according to actual engineering needs, such as the complexity of the exploration area. In the case of complex geological structures or small target bodies, it may be necessary to reduce the spacing between boreholes to obtain more detailed information; conversely, in the case of relatively simple geological conditions, the spacing can be appropriately increased, but the distance between adjacent boreholes on the same exploration line is not greater than the distance between adjacent exploration lines.

[0039] Specifically, if the complexity of the coal exploration area is medium, the spacing between adjacent boreholes on the same exploration line is not greater than 500 meters. If the complexity of the coal exploration area is not medium, the spacing between adjacent boreholes on the same exploration line may be greater than or less than 500 meters. In other words, the spacing between different boreholes on the same exploration line may also be different depending on the actual engineering requirements. Therefore, in the embodiment of the present invention, the spacing between different boreholes on the same exploration line is not specifically limited.

[0040] In one embodiment of the present invention, the influence distance of each borehole can be set according to the actual working conditions. The influence distance refers to the range in which a single borehole can provide effective information. This range will be affected by geological conditions. For example, when the rock formation is relatively uniform and stable, the influence distance of a single borehole can be larger; while in areas with complex geological structures and varied rock formations, it may be necessary to reduce the influence distance to ensure the accuracy of the data.

[0041] Specifically, if the complexity of the coal exploration area is medium, the influence distance of each borehole is no more than 500 meters, and if the complexity of the coal exploration area is not medium, the influence distance of each borehole can be greater than or less than 500 meters. In other words, the influence distance of the borehole will be different according to actual engineering requirements, such as different geological conditions. Therefore, in the embodiment of the present invention, there is no specific limitation on the influence distance of the borehole.

[0042] In one embodiment of the present invention, referring to Figure 2 and Figure 3 The drill holes on adjacent exploration lines are arranged alternately so that the spacing between adjacent drill holes can meet the requirements of the influencing distance, so as to continuously obtain the estimated accuracy of the controlled type coal resources.

[0043] Specifically, the preset spacing between adjacent exploration lines, the set spacing between adjacent boreholes on the same exploration line, and the influence distance of each borehole satisfy the following formula: ; Where a is the preset spacing between adjacent exploration lines, b is the set spacing between adjacent boreholes on the same exploration line, and c is the impact distance of a single borehole.

[0044] Draw a perpendicular line from the borehole to the adjacent exploration line, and the number of divisions of the perpendicular foot to the spacing b between adjacent boreholes on the adjacent exploration line is n. When the foot of the vertical is located at the adjacent borehole, the value of n is 2. When the position is , the value of n is 3, and so on.

[0045] Specifically, in addition to satisfying the above formula, a, b and c must also meet their respective threshold requirements. For example, when the complexity of the coal exploration area is medium, the values ​​of a, b and c cannot be greater than 500 meters. Therefore, the values ​​of a, b and c can be set according to actual working conditions.

[0046] Specifically, since the spacing b between adjacent boreholes on the same exploration line is not greater than the spacing a between adjacent exploration lines, c is the maximum of a, b and c. As long as c meets the threshold requirement, a and b can meet the threshold requirement.

[0047] In one embodiment of the present invention, when a is equal to b, and the foot of the perpendicular line is located at the midpoint of the adjacent boreholes, that is, when n is 2, the second range formed by the boreholes on the adjacent exploration lines is tangent. At this time, the exploration lines and the boreholes are arranged in an optimal state within the threshold range, and the preset spacing a, the set spacing b and the influence distance c satisfy the following formula: .

[0048] For the convenience of explanation and understanding, in a specific embodiment of the present invention, reference is made to Figure 2 , there are multiple exploration lines arranged at equal intervals in the exploration area, from left to right they are exploration lines A, B and C. Among them, there are four boreholes ZK01~ZK04 arranged at equal intervals on exploration line A, three boreholes ZK05~ZK07 arranged at equal intervals on exploration line B, and four boreholes ZK08~ZK11 arranged at equal intervals on exploration line C. ZK01~ZK04 and ZK05~ZK07 are arranged alternately, and ZK05~ZK07 and ZK08~ZK11 are arranged alternately. Take ZK05 as an example and draw a perpendicular line to the exploration line C. The foot of the perpendicular is located at the midpoint of ZK08 and ZK09. If the second range formed with ZK05 as the center and ZK08 and ZK09 as the center is to meet the requirements, the second range formed with ZK05 as the center and the second range formed with ZK08 and ZK09 as the center are at least in a tangent state. At this time, the relationship between a, b and c can be expressed by the formula express.

[0049] Because b is not greater than a, and c is the largest of the three, when b is equal to a and c is the maximum value within the threshold range, the exploration lines and boreholes reach the optimal arrangement state within the threshold range, that is, the spacing between the exploration lines and the spacing between the boreholes reach the maximum value, so it can be obtained .

[0050] When the complexity of the coal exploration area is medium, the values ​​of a, b and c are all no more than 500 meters. At this time, c takes the maximum value of 500, and a and b are both 447 meters.

[0051] When the complexity of the coal exploration area is not medium, the values ​​of a, b and c can all be greater than or less than 500 meters. For example, the upper limit of the threshold range is 1000 meters. At this time, c takes the maximum value of 1000, and the values ​​of a and b are both 894 meters.

[0052] Of course, according to different construction conditions, when the threshold ranges of a, b and c are other, the above formula can be used to obtain the optimal arrangement state of the exploration line and the borehole within the threshold range.

[0053] By adopting the above technical solution, the exploration lines and the boreholes can be arranged in the optimal state within the threshold range, thereby saving exploration costs and improving exploration efficiency while ensuring exploration accuracy.

[0054] It is to be understood that, without mutual contradiction, those skilled in the art may combine and combine the different embodiments or examples and the features of the different embodiments or examples described in this specification.

[0055] By using the high-precision drilling arrangement method provided by the embodiment of the present invention, a first range can be enclosed through adjacent exploration lines and the nearest boreholes on the adjacent exploration lines, so that the resource volume of the first control level can be obtained according to the first range. At the same time, a second range can be enclosed through the influence distance of each borehole, and the resource volume of the second control level can be obtained through the second range. The resource volume of the first control level and the resource volume of the second control level are equivalent in control accuracy and can be verified with each other, which effectively reduces the influence of external factors on the evaluation results, improves the estimation accuracy, and does not need to verify the data through re-drilling, shortens the exploration period, and saves construction costs.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-precision drilling arrangement method, characterized in that: The following steps are involved: Determining an exploration area, and arranging parallel exploration lines in the exploration area at preset intervals; Arranging drill holes on each of the exploration lines at a set interval, defining a first range by using adjacent exploration lines and the drill holes closest to the adjacent exploration lines, and obtaining a first controlled level of resource volume according to the first range; A second range is defined with each of the boreholes as the center and the influence distance of each of the boreholes as the diameter. Adjacent second ranges intersect or are tangent to each other, and the resource volume of the second control level is obtained according to the second ranges.

2. The high-precision drilling arrangement method according to claim 1, characterized in that: The exploration line is perpendicular to the strike of the ore body.

3. The high-precision drilling arrangement method according to claim 2, characterized in that: The exploration lines are arranged at equal intervals.

4. The high-precision drilling arrangement method according to claim 3, characterized in that: The boreholes on the same exploration line are arranged at equal intervals.

5. The high-precision drilling arrangement method according to claim 4, characterized in that: The drill holes on adjacent exploration lines are arranged in a staggered manner.

6. The high-precision drilling arrangement method according to claim 5, characterized in that: The set interval is not greater than the preset interval.

7. The high-precision drilling arrangement method according to claim 6, characterized in that: The preset spacing, the set spacing and the influence distance satisfy the following formula: ； Among them, a is the preset spacing; b is the set spacing; c is the influence distance of a single borehole; n is the number of divisions of the set spacing b between adjacent boreholes on the adjacent exploration line, where the foot of the perpendicular is perpendicular to the adjacent exploration line.

8. The high-precision drilling arrangement method according to claim 7, characterized in that: The borehole is perpendicular to the adjacent exploration line, and the foot of the perpendicular is located at the midpoint of the adjacent borehole on the adjacent exploration line.

9. The high-precision drilling arrangement method according to claim 8, characterized in that: The preset spacing is equal to the set spacing.

10. The high-precision drilling arrangement method according to claim 9, characterized in that: The preset spacing a, the set spacing b and the impact distance c satisfy the following formula: 。

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