Drilling three-dimensional design and dynamic deviation correction method

Abstract

The invention relates to a drill hole three-dimensional design and dynamic deviation correction method, belongs to the field of mine safety, and solves the problems of large construction deviation, parameter adjustment lagging, discontinuous management and the like caused by the fact that traditional drill hole design depends on a two-dimensional drawing and a static model. According to the technical scheme, control points, roadway drilling positions and drilling starting and ending point coordinates are calculated through three-dimensional coordinates, an actually-measured track is imported for dynamic deviation correction, parameters are optimized based on the offset distance, uniformity is detected and evaluated through a blank zone, closed-loop management of the whole process of design, construction and acceptance is achieved, and the drilling precision, efficiency and gas extraction uniformity are improved.

Description

Technical Field

[0001] This invention belongs to the field of mine safety and relates to a method for three-dimensional borehole design and dynamic correction. Background Technology

[0002] During underground drilling in coal mines, due to the complexity and dynamic changes in coal seam occurrence conditions, traditional borehole design methods mainly rely on two-dimensional drawings and static geological models for planning. This traditional method struggles to adapt to the dynamic fluctuations in coal seam occurrence in real time, leading to significant deviations between drilling parameters and design parameters. The direct consequence is uneven coverage of gas drainage boreholes, easily resulting in drainage gaps, thus reducing gas drainage efficiency and increasing safety risks.

[0003] In existing technologies, some improvement schemes have been proposed to enhance the efficiency of borehole design. For example, a team from China University of Mining and Technology published a paper titled "Automatic Optimization Design and Application of Borehole Parameters for Gas Drainage in Coal Seam Uncovering in Shimen." This scheme uses the Hungarian algorithm and simulated annealing algorithm to optimize the design process of boreholes for coal seam uncovering in Shimen, improving borehole mapping efficiency. However, its core is still based on the principle of uniformity, focusing only on improving the cumbersome aspects of the design stage. Another scheme comes from a patent of Elite Digital Technology Co., Ltd., titled "A Method and Device for Automatic Borehole Arrangement in Advanced Drilling Design," patent number CN201610797532.1. This scheme addresses the water exploration and drainage needs in coal seam roadway excavation by automatically arranging auxiliary boreholes through calculation of central borehole parameters and integrating devices for field application. However, these existing technologies all focus on efficiency optimization in the design stage and do not fully consider the dynamic changes in borehole trajectory and the real-time correction needs during construction.

[0004] In-depth analysis of existing technical data reveals three major limitations in current methods. First, borehole design, based on a uniform layout principle, lacks adaptability to dynamic changes in the coal seam, leading to significant deviations between design and actual construction. Second, borehole parameter adjustments rely on experience and are inherently lagging, resulting in low efficiency and poor accuracy. Third, the design, construction, and acceptance stages of borehole drilling are disconnected, making it difficult to achieve closed-loop management of the entire gas drainage process. Therefore, there is an urgent need for a method that integrates three-dimensional design, dynamic correction, and intelligent evaluation to drive the transformation of coal mine drilling from experience-driven to data-driven approaches. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a method for three-dimensional borehole design and dynamic correction.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A method for three-dimensional borehole design and dynamic correction includes the following steps: Basic parameter preparation steps; Steps for determining the coal seam cross-sectional outline of the borehole control area; Steps for calculating the coordinates of the drilling location in the tunnel; Design the steps for calculating the coordinates of the starting and ending points of the borehole; Steps for calculating the offset distance between an existing borehole and an adjacent borehole to be drilled; Steps for calculating optimized parameters for boreholes to be drilled; Optimized drilling parameter calculation steps; And the steps for detecting blank zones in boreholes.

[0008] Furthermore, the basic parameter preparation step includes determining the effective extraction radius of the borehole. r The parameters include: the cross-sectional dimensions of the extraction area roadway, the stagger distance between the coal roadway and the construction roadway, the vertical layer spacing between the construction roadway and the coal roadway, and the traverse point parameters of the construction roadway; the traverse point parameters of the construction roadway include plane coordinates and elevation.

[0009] Furthermore, the step of determining the coal seam cross-sectional outline of the borehole control area is based on calculating the coordinates of the coal seam outline inflection points using the coordinates of the construction roadway axis points and the relative offset distance; the calculation uses the following formula:

[0010] in, , , For the coordinates of the control points, The horizontal offset distance of the control point relative to the axis of the construction roadway. This refers to the vertical offset distance of the control point relative to the axis of the construction roadway. , , The coordinates of the axis point of the construction tunnel. For the cross-sectional plan projection of the tunnel and X Angle between coordinate axes.

[0011] Furthermore, the calculation step for the tunnel drilling position coordinates is based on the drilling step distance and the difference calculation method to complete the coordinates; the calculation includes: rotating the tunnel axis coordinates to the same position as the borehole. Y shaft or X If the axes are parallel or coincident, the three-dimensional coordinates of the drilling location in the tunnel are completed based on linear interpolation, and then inverse transformation is performed to restore them to the construction coordinate system.

[0012] Furthermore, in the step of calculating the coordinates of the starting and ending points of the borehole, the coordinates of the starting point are calculated based on the coordinates of the drilling location in the roadway and the relative offset distance of the starting point; the coordinates of the ending point are calculated based on the coordinates of the starting point, the borehole length, the azimuth angle, and the inclination angle; the calculation uses the following formula: Calculation of the coordinates of the opening point:

[0013] Calculation of final hole coordinates: If 90°- <0, then =270- ;otherwise =90°- ; in, , , Here are the coordinates of the hole opening point. This is the horizontal offset distance between the borehole point and the drilling location point in the tunnel. This is the vertical offset distance between the borehole point and the drilling location in the tunnel. , , The coordinates of the drilling location in the tunnel. For the cross-sectional plan projection of the tunnel and X Angle between coordinate axes The drilling angle is... This is the borehole azimuth angle. The drilling depth , , These are the coordinates of the final hole point.

[0014] Furthermore, the step of calculating the offset distance between the drilled borehole and the adjacent borehole to be drilled includes: converting the measured trajectory coordinates based on the coordinate generation principle of the trajectory measurement device, and calculating the distance between the lines connecting the same cross sections in space, the vertical distance between the same cross sections in space, the left and right deviation distances of the projection, and the front and back deviation distances of the projection.

[0015] Furthermore, in the calculation of the offset distance, the distance between lines connecting the same cross-section in space is calculated using the following formula:

[0016] in, The distance between lines connecting the same cross section in space. , , These are the coordinates of the projection points of the borehole to be drilled onto the same Z-coordinate plane. , , These are the coordinates of the trajectory points after the existing boreholes have been converted.

[0017] Furthermore, the step of calculating the optimization parameters of the borehole to be constructed is to automatically correct the parameters of the borehole to be constructed based on the point-to-point vertical distance or line distance between the borehole to be constructed and the borehole to be constructed; the correction includes: determining the borehole spacing optimization parameters according to the line distance between the points of the two boreholes or determining the borehole spacing optimization parameters according to the vertical distance between the points of the two boreholes.

[0018] Furthermore, the optimized drilling parameters calculation steps include calculating the optimized borehole inclination angle, azimuth angle, and borehole depth; the borehole inclination angle is calculated using the formula:

[0019] in, To optimize the borehole inclination angle, To optimize the final hole point Z coordinate, For the opening point Z coordinate, To optimize the borehole length.

[0020] Furthermore, the borehole blank zone detection step performs geometric modeling and collision detection based on the coordinate points of all drilled boreholes; the collision detection uses the Delaunay triangulation algorithm to form a triangular network and calculates the circumcircle radius to determine the blank zone.

[0021] Furthermore, the method also includes the step of generating as-built drawings based on optimized parameters and automatically annotating them.

[0022] The beneficial effects of this invention are as follows: First, this method significantly improves the statistical accuracy and management efficiency of borehole construction projects. Traditional methods rely on human experience and two-dimensional static data, which are prone to significant errors. In contrast, this invention, based on precise three-dimensional coordinate calculation and real-time data import, achieves accurate positioning of the borehole trajectory and automated parameter calculation, effectively reducing human error and improving the efficiency and reliability of data processing.

[0023] Secondly, this invention closely integrates borehole construction with dynamic inversion of coal seam attitude. By importing the trajectory data of drilled boreholes in real time and dynamically updating coal seam attitude information based on a geometric model, this method not only drives real-time adjustments to construction parameters but also provides a scientific basis and guidance for subsequent mining activities. This dynamic adaptability significantly enhances the responsiveness of borehole engineering to complex coal seam conditions.

[0024] Third, this method achieves coordinated operation of real-time on-site correction and automatic analysis of small-area blank zones. By calculating the spatial offset distance between drilled boreholes and those to be drilled, and automatically optimizing parameters based on preset extraction radii, this invention can promptly correct borehole trajectories, ensuring uniform extraction coverage. Simultaneously, by utilizing the Delaunay triangulation algorithm for collision detection, it can automatically identify and highlight blank extraction areas, thereby guiding borehole filling operations and forming a closed-loop linkage between construction and evaluation.

[0025] Fourth, this invention constructs a closed-loop management system covering the entire process from design to acceptance. This method integrates all stages of drilling design, construction, trajectory measurement, parameter optimization, as-built drawing generation, and blank zone detection, breaking down data barriers between traditional stages. This integrated management approach promotes the transformation of coal seam gas extraction towards refinement and intelligence, fundamentally improving the data-driven level of coal mine safety production.

[0026] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0027] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein: Figure 1 A schematic diagram of the method for calculating 3D modeling parameters; Figure 2 A partial enlargement of the 3D modeling parameter calculation method; Figure 3 Generate 3D model results for the computational case; Figure 4 Generate a top view of the 3D model for the computational case; Figure 5 Generate a 3D model side view for the computational case; Figure 6 Generate a 3D model front view for the calculation case. Detailed Implementation

[0028] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0029] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0030] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0031] The basic working principle of this method is as follows: First, based on the latitude and longitude coordinates and the elevation of the guide points on the mine excavation engineering plan, a limited number of coordinate control points are constructed in the construction area; these control points are called the axis coordinates of the construction roadway. Second, coordinate completion is performed based on the drilling step distance and difference calculation method to obtain the coordinates of the drilling location points in the roadway. Third, the coordinates of the coal seam contour inflection point are calculated based on the offset distance of the coal seam cross-section contour line relative to the axis point of the construction roadway. Fourth, the coordinates of the borehole opening point are calculated based on the offset distance of the borehole relative to the axis point of the roadway. Fifth, the coordinates of the borehole termination point are calculated based on the coordinates of the opening point and parameters such as borehole length, azimuth, and dip angle. Sixth, a measured trajectory import and conversion model is constructed based on the coordinate generation principle of the trajectory measurement device and the modeling method involved in this invention. Seventh, coordinate axis conversion is performed. The principle calculation yields the front-back-left-right offset distance of the actual trajectory relative to the borehole to be constructed; eighth, based on the point-to-point vertical distance or connecting distance of the borehole to be constructed relative to the already constructed boreholes, the parameters of the borehole to be constructed are automatically corrected to ensure that the vertical distance or connecting distance of each point relative to the adjacent constructed trajectories meets the standard requirements; ninth, based on the distances to the coal-bearing and coal-exit points of the imported borehole trajectory, the coal seam attitude within the borehole control range is optimized; tenth, based on the design borehole parameters, the imported parameters of the already constructed borehole trajectory, and the updated attitude of the borehole control area, as-built drawings are generated and can be automatically annotated; eleventh, based on all modeling parameters, the engineering quantities of the design borehole and the actual constructed borehole are statistically calculated, and the blank zone and uniformity of the borehole generation are judged by the three-dimensional spatial geometric collision detection method. A schematic diagram of the three-dimensional modeling parameter calculation method is shown below. Figures 1-2 As shown.

[0032] The main steps of implementing this method are as follows: (1) Preparation of basic parameters: Determine the effective extraction radius of the borehole rThe dimensions of the extraction area and the cross-section of the borehole construction roadway, the stagger distance between the coal roadway and the construction roadway, the vertical layer spacing between the construction roadway and the coal roadway, the parameters of the guide points of the construction roadway (plane coordinates and elevation), and the angle θ between the plane projection of the roadway cross-section and the X-coordinate axis, etc.

[0033] (2) Determination of the coal seam cross-sectional outline in the borehole control area: ① Point selection principle The number of control points and groups for a single contour line are determined based on the changes in the coal seam cross-section contour line. If the overall change in the coal seam cross-section contour line along the roadway extension direction is not significant and the cross-section is relatively regular, only 4 points need to be taken. Conversely, a single cross-section needs to take more control points and several groups of contour line control points depending on the changes. In short, the more control points and the more cross-section data groups there are, the more accurate the modeling will be. The data category of the points taken is the left, right, up, and down offset distance of the target control point relative to the axis point of the construction roadway.

[0034] ② Calculation of control point coordinates If the relative distance of any control point is , The coordinates of the corresponding construction tunnel axis point are ( , , ), the cross-sectional planar projection of the tunnel and x Angle between coordinate axes θ :

[0035] (3) Calculation of drilling location coordinates in the tunnel: ① Calculation of the plane coordinates of the drilling location in the tunnel If the starting plane coordinates of the drilling location in the tunnel are ( , The extraction radius is r Then any point i The coordinates of the drilling location in the tunnel are:

[0036] ② Calculation of three-dimensional coordinates of the drilling location in the tunnel The three-dimensional coordinates of the drilling location in the tunnel are calculated using a linear interpolation method, that is, the three-dimensional coordinates of the drilling location in the tunnel are completed based on the known three-dimensional coordinates of the tunnel axis. First, rotate the tunnel axis until it is parallel to or coincides with the y-axis or X-axis:

[0037]

[0038] Second, rotate the drilling location coordinates of the tunnel to be parallel to or coincide with the y-axis and X-axis:

[0039] Third, we can determine that another parameter must lie between the corresponding parameters in the roadway axis coordinate system. Then, we determine the upper and lower limits of the target band's X or Y coordinates in the rotated roadway axis coordinate system. Further, we complete the coordinates using linear interpolation, and finally perform an inverse coordinate transformation to restore them to the construction coordinate system. If, after rotation, all coordinates coincide with or are parallel to the X-axis, then all... Then, the upper and lower lines are determined based on the Y-axis, and the Z-coordinate is completed.

[0040] if:

[0041] but:

[0042] Fourth, the coordinates of the completed drilling location in the tunnel can be obtained as follows: , , ) Fifth, perform an inverse transformation on the completed tunnel drilling location coordinates:

[0043] (4) Calculation of the coordinates of the starting and ending points of the borehole: ① Calculation of the coordinates of the opening point The coordinates of the borehole point are calculated based on the coordinates of the drilling location in the tunnel and the offset distance of the borehole point relative to the drilling location. If the offset distance of any drilling point relative to the drilling location in the tunnel is , The design inclination angle of the drill hole is Azimuth Hole depth The cross-sectional planar projection of the tunnel and x Angle between coordinate axes θ, The method for calculating the coordinates of the opening is as follows:

[0044] ② Calculation of final hole coordinates If 90°- <0, =270- ;otherwise, =90°- :

[0045] (5) Calculation of the offset distance between the drilled borehole and the adjacent borehole to be drilled: ① Measured trajectory conversion The principle of the measured trajectory coordinate is to rotate the true north axis to the design orientation and use it as the measurement x-axis. That is, the drilling direction of each borehole is the positive direction of the measured trajectory coordinate x (not necessarily coincident, the actual trajectory has a left or right offset from x, which is y). In addition, it should be noted that this coordinate system is a left-handed coordinate system, not a right-handed coordinate system.

[0046] If the angle between the x-axis of the drilled hole and the x-axis of the model is... (Right-handed coordinate system, positive when turning from the positive x-axis to the positive y-axis). Because one is a right-handed coordinate system and the other is a left-handed coordinate system, when the x-axis is the same, the y-axis is opposite. Therefore, the measured trajectory's y-axis must first be reversed. Suppose a set of actual drilling trajectory point coordinates are ( , , Then the converted measured trajectory is:

[0047] ② Offset distance calculation The offset distance between boreholes includes the distance between the drilled borehole and the adjacent borehole to be drilled on the same cross section, the vertical distance on the same cross section, the left and right offset distance of the projection, and the front and back offset distance of the projection. The borehole to be drilled is defined by z= The borehole is divided into planes to obtain the corresponding x and y coordinates:

[0048] Ⅰ Spatial distance between lines connecting the same cross section The method for calculating the distance between lines connecting the same cross section in space is as follows:

[0049] II. Spatial vertical distance at the same cross section First, calculate the length of the borehole trajectory at the same cross section in both borehole spaces:

[0050]

[0051] Second, determine the lengths of existing boreholes and adjacent boreholes to be drilled in the same spatial section. If... The following method can be used, or the starting point of the vertical distance can be changed to another point, as long as the point of the vertical distance falls within the known borehole line, rather than on its extension.

[0052] Third, construct an auxiliary common starting point vector for calculating the perpendicular distance of the same cross section in space:

[0053]

[0054] Fourth, by substituting the relevant quantities into the following formula, the vertical distance between the drilled holes and the adjacent drilled holes to be drilled at the same cross-section in space can be calculated:

[0055] III. Projection lateral and front-back distances The calculation methods for the left-right and front-back distances of the projection are as follows:

[0056] (6) Calculation of optimized parameters for boreholes to be drilled: Ⅰ Optimization of determining borehole spacing based on the distance between points on two boreholes exist Find its maximum value in the results. corresponding This is the offset distance that needs to be optimized. The optimized coordinates are obtained by calculating the following formula:

[0057] II. Optimization of determining borehole spacing based on vertical distances at various points between the two holes With z= The vertical distance between the drilled holes after planar cutting and the adjacent drilled holes to be drilled that require optimization reaches the design requirement value of 2. r When z= The coordinates of the adjacent boreholes to be drilled that need to be optimized ( , This point is always at On the straight line formed, point ( , , The parameterized coordinates are ( , , The vector of the adjacent boreholes to be drilled that needs optimization is:

[0058] pass It can be calculated Furthermore, z can be calculated to obtain z= The coordinates of the adjacent boreholes to be drilled that require optimization are used to obtain the final borehole coordinates optimized based on the vertical distance between the two boreholes. ( , , ) (7) Calculation of optimized drilling parameters: After obtaining the optimized coordinates of the borehole to be drilled, the inclination angle of the optimized borehole can be calculated using the following method:

[0059] After obtaining the optimized coordinates of the borehole to be drilled, the azimuth angle of the optimized borehole can be calculated using the following method: If adjacent boreholes to be drilled need to be optimized to the left, then Conversely, .

[0060] After obtaining the optimized coordinates of the borehole to be drilled, the depth of the optimized borehole can be calculated using the following method:

[0061] (8) Detection of blank zones in boreholes: Based on the coordinates of all drilled boreholes ( , , Based on the angle between the coal seam bedding and each borehole , with coordinate points ( , , With as the center, the effective extraction radius is... r Let the radius be the circle. First, geometric modeling of the influence range of each borehole is performed based on the angle between the circular cross-section and the borehole. Second, collision detection is performed based on the intersection relationship between the geometric figures. Specifically, using the Delaunay triangulation algorithm, the center points of all boreholes are connected to form a triangular mesh (TIN). Each triangle in the TIN is traversed, and the radius of its circumcircle is calculated. If the circumcircle radius is smaller than the influence radius of the borehole, then there is no blank zone inside the triangle; otherwise, there is a blank zone. Then, different highlighting methods are used to visualize the triangular units with and without blank zones. The degree of offset of the triangular unit center can be used to measure the uniformity of the borehole layout.

[0062] To further illustrate this method, the following examples are provided: (1) Preparation of basic parameters: The effective extraction radius r of the mine is 5m, the cross-sectional dimensions of the extraction area roadway are 5.0×3.0m, the cross-sectional dimensions of the borehole construction roadway are 5.0×3.5m, the internal offset between the extraction area roadway and the borehole construction roadway is -20m, the vertical layer spacing between the extraction area and the borehole construction roadway is 28.5m, and the coordinates of the traverse points of the borehole construction roadway (only two sets are listed here for illustrative purposes): Point 1 (0, 0, 270), Point 2 (-49.51, 85.75, 269.95). The angle between the construction roadway cross-section and the positive direction of the measurement X-axis is 30°. Since the extraction coverage area is small, the distance between the points of the two boreholes is used as the judgment index.

[0063] (2) Determination of the coal seam cross-sectional outline in the borehole control area: ① Coal seam profile parameters in the borehole control area Since the coal seam in the borehole control area is relatively regular, only 4 points are taken for each group of offset distances relative to the guide points of the borehole construction roadway. The interlayer spacing along the roadway extension direction has little variation, and the offset distances of the two groups are consistent. The relevant measurement results are shown in Table 1.

[0064] Table 1. Coal seam profile parameters in the borehole control area

[0065] ② Calculation of control point coordinates The coordinates of the control points can be calculated using the following formula, and the results of the control point coordinate calculation are shown in Table 2.

[0066]

[0067] Table 2 Calculation results of control point coordinates

[0068] (3) Calculation of the plane coordinates of the drilling location in the tunnel This study uses the coordinates of the two converted construction roadway axes as the calculation objects (Table 3), and the coordinates of the drilling positions of the two rows of pre-conversion drilling construction roadways as the judgment objects (Table 4). The coordinates of the drilling positions of the two rows of converted drilling construction roadways can be obtained by converting them using the following formula (Table 5).

[0069]

[0070] Table 3. Converted coordinates of the construction tunnel axis

[0071] Table 4. Coordinates of drilling locations in the borehole construction roadways before the conversion of rows 1-2.

[0072] Table 5. Coordinates of drilling locations in the converted rows 1-2 of the borehole construction roadway.

[0073] After transformation using the above method, the X coordinates are all equal. Therefore, the Y coordinate is used as the basis for completion. When the drilling position 1 in the borehole construction roadway corresponds to Y=4.000, in the transformed borehole construction roadway traverse point coordinates, 0<4<99.017, so the corresponding Z after completion based on the difference should be 269.998. If 0<9<99.017, then the corresponding Z after completion based on the difference should be 269.996.

[0074] Then, by performing an inverse transformation on the completed roadway drilling position coordinates using the following formula, the final drilling position coordinates of the first and second rows of the transformed drilling roadway can be obtained (Table 6).

[0075]

[0076] Table 6. Coordinates of drilling locations in the borehole construction tunnels, rows 1-2, completed.

[0077] (4) Calculation of coordinates of the opening point and the closing point Table 7 shows the design parameters for the first two rows of boreholes. Substituting these parameters into the following formulas, the coordinates of the borehole start point and end point can be obtained. The calculation results are shown in Table 8.

[0078] ① Calculation of the coordinates of the opening point

[0079] ② Calculation of final hole coordinates

[0080] Table 7 Design parameters for rows 1-2 of boreholes

[0081] Table 8. Calculation results of the starting and ending coordinates of the first and second rows of boreholes.

[0082] (5) Calculation of the offset distance between the construction borehole and the adjacent borehole to be constructed: Table 9 shows the trajectory coordinates of a single hole obtained using a trajectory measuring device. The offset distance between the drilling hole and the adjacent drilling hole to be drilled can be calculated using the following formula (Table 10).

[0083] ① Trajectory Measurement Point Conversion Model

[0084] ② Trajectory Curve Segmentation Model

[0085] ③ Calculation of the distance between the dividing points

[0086] ④ Calculation of offset distances before, after, to the left and right of the dividing point

[0087] ⑤ Calculation of optimized parameters for boreholes to be drilled

[0088] (6) Calculation of optimized drilling parameters: After obtaining the optimized coordinates of the borehole to be constructed, taking boreholes 1-2 as an example, the inclination angle, azimuth angle, and expected depth of the optimized borehole can be calculated using the following formula (Table 11).

[0089] ① Optimize backslope calculation

[0090] ② Optimized azimuth calculation If adjacent boreholes to be drilled need to be optimized to the left, then Conversely, .

[0091] ③ Optimized Hole Depth Prediction

[0092] Table 9. Measurement results from the trajectory measuring device

[0093] Table 10 Calculation results of the offset distance between the drilling borehole and the adjacent borehole to be drilled.

[0094] Table 11 Calculation results of optimized borehole parameters

[0095] (7) Detection of blank zones in boreholes: With coordinate points ( , , With 5m as the effective extraction radius and centered at 5m, the radius of the circle is... When a circular cross-section is taken parallel to the coal seam, the angle between it and the borehole is used to perform system geometric modeling, and the blank zone of the borehole is automatically detected and visualized.

[0096] Figure 3 Generate 3D model results for the computational case; Figure 4 Generate a top view of the 3D model for the computational case; Figure 5 Generate a 3D model side view for the computational case; Figure 6 Generate a 3D model front view for the calculation case.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for three-dimensional borehole design and dynamic correction, characterized in that: Includes the following steps: Basic parameter preparation steps; Steps for determining the coal seam cross-sectional outline of the borehole control area; Steps for calculating the coordinates of the drilling location in the tunnel; Design the steps for calculating the coordinates of the starting and ending points of the borehole; Steps for calculating the offset distance between an existing borehole and an adjacent borehole to be drilled; Steps for calculating optimized parameters for boreholes to be drilled; Optimized drilling parameter calculation steps; And the steps for detecting blank zones in boreholes.

2. The drilling three-dimensional design and dynamic correction method according to claim 1, characterized in that: The basic parameter preparation steps include determining the effective extraction radius of the borehole. r The parameters include: the cross-sectional dimensions of the extraction area roadway, the stagger distance between the coal roadway and the construction roadway, the vertical layer spacing between the construction roadway and the coal roadway, and the traverse point parameters of the construction roadway; the traverse point parameters of the construction roadway include plane coordinates and elevation.

3. The drilling three-dimensional design and dynamic correction method according to claim 1, characterized in that: The step of determining the coal seam cross-sectional outline of the borehole control area is based on calculating the coordinates of the coal seam outline inflection points using the coordinates of the axis points of the construction roadway and the relative offset distance; the calculation uses the following formula: in, , , For the coordinates of the control points, The horizontal offset distance of the control point relative to the axis of the construction roadway. This refers to the vertical offset distance of the control point relative to the axis of the construction roadway. , , The coordinates of the axis point of the construction tunnel. For the cross-sectional plan projection of the tunnel and X Angle between coordinate axes.

4. The drilling three-dimensional design and dynamic correction method according to claim 1, characterized in that: The calculation steps for the tunnel drilling location coordinates are based on the drilling step distance and difference calculation method to complete the coordinates; the calculation includes: rotating the tunnel axis coordinates to the same position as the borehole construction step distance and the difference calculation method. Y shaft or X If the axes are parallel or coincident, the three-dimensional coordinates of the drilling location in the tunnel are completed based on linear interpolation, and then inverse transformation is performed to restore them to the construction coordinate system.

5. The drilling three-dimensional design and dynamic correction method according to claim 1, characterized in that: In the step of calculating the coordinates of the starting and ending points of the borehole, the coordinates of the starting point are calculated based on the coordinates of the drilling location in the roadway and the relative offset distance of the starting point; the coordinates of the ending point are calculated based on the coordinates of the starting point, the borehole length, the azimuth angle, and the inclination angle; the calculation uses the following formula: Calculation of the coordinates of the opening point: Calculation of final hole coordinates: If 90°- <0, then =270- ;otherwise =90°- ; in, , , Here are the coordinates of the hole opening point. This is the horizontal offset distance between the borehole point and the drilling location point in the tunnel. This is the vertical offset distance between the borehole point and the drilling location in the tunnel. , , The coordinates of the drilling location in the tunnel. For the cross-sectional plan projection of the tunnel and X Angle between coordinate axes The drilling angle is... This is the borehole azimuth angle. The drilling depth , , These are the coordinates of the final hole point.

6. The drilling three-dimensional design and dynamic correction method according to claim 1, characterized in that: The steps for calculating the offset distance between the drilled borehole and the adjacent borehole to be drilled include: converting the measured trajectory coordinates based on the coordinate generation principle of the trajectory measurement device, and calculating the distance between the lines connecting the same cross sections in space, the vertical distance between the same cross sections in space, the left and right deviation distances of the projection, and the front and back deviation distances of the projection.

7. The drilling three-dimensional design and dynamic correction method according to claim 6, characterized in that: In the calculation of the offset distance, the distance between lines connecting the same cross section in space is calculated using the following formula: in, The distance between lines connecting the same cross section in space. , , These are the coordinates of the projection points of the borehole to be drilled onto the same Z-coordinate plane. , , These are the coordinates of the trajectory points after the existing boreholes have been converted.

8. The drilling three-dimensional design and dynamic correction method according to claim 1, characterized in that: The step of calculating the optimization parameters of the borehole to be constructed is based on the point-to-point vertical distance or line distance between the borehole to be constructed and the borehole to be constructed. The correction includes: determining the borehole spacing optimization parameters according to the line distance between the points of the two boreholes or determining the borehole spacing optimization parameters according to the vertical distance between the points of the two boreholes.

9. The drilling three-dimensional design and dynamic correction method according to claim 1, characterized in that: The optimized drilling parameters calculation steps include calculating the optimized borehole inclination angle, azimuth angle, and borehole depth; the borehole inclination angle is calculated using the formula: in, To optimize the borehole inclination angle, To optimize the final hole point Z coordinate, For the opening point Z coordinate, To optimize the borehole length.

10. The drilling three-dimensional design and dynamic correction method according to claim 1, characterized in that: The borehole blank zone detection step is based on geometric modeling and collision detection of the coordinate points of all drilled boreholes; the collision detection uses the Delaunay triangulation algorithm to form a triangular network and calculates the circumcircle radius to determine the blank zone.

11. The drilling three-dimensional design and dynamic correction method according to claim 1, characterized in that: The method also includes the steps of generating as-built drawings based on optimized parameters and automatically annotating them.

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