Rapid and convenient plane mapping method suitable for advanced exploration treatment technology of coal mine ground area

Abstract

The invention discloses a rapid and convenient plane mapping method suitable for a coal mine ground area advanced exploration treatment technology, and belongs to the technical field of coal mining. The method comprises the following steps: determining a treatment range through coal mine field exploration; selecting an orifice position from the treatment range according to topographic conditions; according to the treatment range, the orifice position and the topographic condition, a hole group layout form is obtained; a circle with the radius of 192 m is attached to a design curve when a place needing to be turned is encountered. The method can solve the problem that construction cannot be carried out due to the fact that the dogleg degree of advanced exploration treatment design of the coal mine ground area is too large. The treatment range of the ground area advanced exploration treatment project is not necessarily a regular square, a proper hole group arrangement form is selected when the ground area advanced exploration treatment project is designed, the project amount can be reduced as much as possible under the condition that the treatment range is met, and the cost is controlled.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mining, and in particular to a method for fast and convenient plane mapping of advanced exploration and management technology applicable to ground areas of coal mines. Background Art

[0002] As the coal resources in the front of the central and eastern regions of my country are becoming increasingly depleted, the depth of coal seams being mined is getting deeper and deeper, and the threat of limestone confined water to coal seam mining is increasing. Therefore, the ground area advance exploration and treatment technology is becoming more and more widely used in the field of coal floor reinforcement. The ground area exploration and treatment technology generally uses oil drilling rigs to construct directional branch holes from the ground, which can radiate from a ground well position to the surrounding area. Therefore, when designing the ground area advance exploration and treatment, the drilling hole position and the trajectory of each branch hole are restricted by the dogleg degree. The dogleg degree refers to the angle at which the direction of the wellbore changes from one point to another in the wellbore. This angle reflects both the change in the well inclination angle and the change in the azimuth angle, and is usually called the full angle change rate or the wellbore curvature. According to the current equipment capabilities, when the dogleg degree exceeds 30° / 100m, the construction difficulty increases, and even construction cannot be carried out, resulting in the regional advance exploration and treatment project failing to meet the design requirements and the floor transformation effect failing to meet the requirements. Therefore, a drawing method that can avoid the inability to construct due to excessive doglegs is invented, which can effectively avoid the situation where the designed project cannot be constructed. The method can also roughly estimate the maximum treatment range that can be covered by the branch holes drilled from the upper side of a main hole, which greatly facilitates the overall layout of the ground area treatment drilling plane. The invention is of great significance to the design and construction of advanced exploration and treatment in coal mine areas. Summary of the invention

[0003] The purpose of the present invention is to provide an efficient method for fast and convenient planar mapping suitable for advanced exploration and management technology of ground areas in coal mines, so as to avoid the situation where the dogleg is too large and construction is impossible when conducting advanced exploration and management design of ground areas.

[0004] In order to solve the above technical problems, the present invention provides a method for fast and convenient plane mapping of advanced exploration and management technology in coal mine ground areas, comprising the following steps:

[0005] Determine the hole group layout form of the coal mine; the hole group layout form includes a main hole and a plurality of branch holes;

[0006] Draw the turning section between the main hole and the branch hole;

[0007] Based on the main hole, branch holes and turning sections, an advanced exploration and management map of the ground area of ​​the coal mine is obtained.

[0008] Preferably, determining the hole group layout form of the coal mine specifically includes the following steps:

[0009] Determine the scope of governance through on-site investigation of coal mines;

[0010] Select the orifice location from the treatment range according to the terrain conditions;

[0011] According to the treatment scope, terrain conditions and hole mouth position, the main hole and branch holes are obtained as the hole group layout form.

[0012] Preferably, drawing the turning section between the main hole and the branch hole specifically includes the following steps:

[0013] Draw a turning segment between the main hole and the branch hole using a preset circle.

[0014] Preferably, a turning section is drawn between the main hole and the branch hole by a preset circle, which specifically includes the following steps:

[0015] Draw a preset circle;

[0016] According to the main hole and the branch hole, a part of the arc of the preset circle is intercepted;

[0017] Move the arc between the main hole and the branch hole. The main hole is connected to the branch hole through the arc, and the arc serves as a turning segment.

[0018] Preferably, the radius of the preset circle is 192m.

[0019] Preferably, the method further comprises the following steps:

[0020] According to the layout of the hole group, the dogleg degree and water-slope ratio of the branch hole are obtained;

[0021] According to the dogleg degree and water vertical ratio of the branch hole, the maximum treatment range covered by the branch hole is obtained.

[0022] Preferably, the branch hole dogleg degree = (100 / 2πr)*360°;

[0023] Where: r is the radius of the arc of the bending segment.

[0024] Preferably, the water-to-vertical ratio=horizontal projection length / vertical depth.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The present invention can solve the problem that the design of advanced exploration and treatment in the ground area of ​​coal mines is too dog-legged, which makes construction impossible. The treatment range of the ground area advanced exploration and treatment project is not necessarily a regular quadrilateral. When designing the ground area advanced exploration and treatment project, a suitable hole group layout form is selected to reduce the engineering workload and control the cost as much as possible while meeting the treatment range. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The specific implementation modes of the present invention are further described in detail below with reference to the accompanying drawings.

[0028] Figure 1 It is a schematic flow chart of a method for fast and convenient plane mapping of advanced exploration and management technology for ground areas of coal mines according to the present invention;

[0029] Figure 2 It is the layout morphology diagram of the advanced regional governance hole group;

[0030] Figure 3 It is a schematic diagram of the plane drawing of the present invention. DETAILED DESCRIPTION

[0031] Many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention, so the present invention is not limited to the specific implementation disclosed below.

[0032] The terms used in one or more embodiments of this specification are only for the purpose of describing specific embodiments, and are not intended to limit one or more embodiments of this specification. The singular forms of "a", "said" and "the" used in one or more embodiments of this specification and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in one or more embodiments of this specification refers to and includes any or all possible combinations of one or more associated listed items.

[0033] It should be understood that although the terms first, second, etc. may be used to describe various information in one or more embodiments of this specification, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of one or more embodiments of this specification, the first may also be referred to as the second, and similarly, the second may also be referred to as the first. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0035] In order to better illustrate the technical effect of the present invention, the present invention provides the following specific embodiments to illustrate the above technical process:

[0036] The present invention provides a method for quickly and conveniently mapping a surface area of ​​a coal mine using advanced exploration and management technology, comprising the following steps:

[0037] Determine the hole group layout form of the coal mine; the hole group layout form includes a main hole and a plurality of branch holes;

[0038] Draw the turning section between the main hole and the branch hole;

[0039] Based on the main hole, branch holes and turning sections, an advanced exploration and management map of the ground area of ​​the coal mine is obtained.

[0040] Preferably, determining the hole group layout form of the coal mine specifically includes the following steps:

[0041] Determine the scope of governance through on-site investigation of coal mines;

[0042] Select the orifice location from the treatment range according to the terrain conditions;

[0043] According to the treatment scope, terrain conditions and hole mouth position, the main hole and branch holes are obtained as the hole group layout form.

[0044] Preferably, drawing the turning section between the main hole and the branch hole specifically includes the following steps:

[0045] Draw a turning segment between the main hole and the branch hole using a preset circle.

[0046] Preferably, a turning section is drawn between the main hole and the branch hole by a preset circle, which specifically includes the following steps:

[0047] Draw a preset circle;

[0048] According to the main hole and the branch hole, a part of the arc of the preset circle is intercepted;

[0049] Move the arc between the main hole and the branch hole. The main hole is connected to the branch hole through the arc, and the arc serves as a turning segment.

[0050] Preferably, the radius of the preset circle is 192m.

[0051] Preferably, the method further comprises the following steps:

[0052] According to the layout of the hole group, the dogleg degree and water-slope ratio of the branch hole are obtained;

[0053] According to the dogleg degree and water vertical ratio of the branch hole, the maximum treatment range covered by the branch hole is obtained.

[0054] Preferably, the branch hole dogleg degree = (100 / 2πr)*360°;

[0055] Where: r is the radius of the arc of the bending segment.

[0056] Preferably, the water-to-vertical ratio=horizontal projection length / vertical depth.

[0057] Embodiment 1: A method for quickly and conveniently mapping a surface area of ​​a coal mine using advanced exploration and management technology, such as Figure 1 As shown. The following steps are included:

[0058] According to Appendix B of the Technical Specifications for Advanced Regional Management of Limestone Aquifers in Coal Seam Floors, there are three types of hole group layouts, such as Figure 2 As shown. After field investigation, the selected orifice position and the expected treatment target area are drawn using AutoCAD software. The hole group layout is determined by comprehensively considering the scope of the treatment area, the orifice position, the terrain and other factors. The ground area advance exploration treatment hole group includes the main hole and the branch hole. The main hole refers to the drill hole first designed and constructed on the drilling axis, and the branch hole refers to the directional hole branching from the main hole.

[0059] Directional drilling technology is required for regional advance exploration and management. This is a drilling method that utilizes the natural curvature of the borehole or uses artificial inclination tools to produce a certain curvature in the borehole, forcing the axis of the borehole to extend along the designed trajectory. When encountering all places that require bending, use a circle with a radius of 192m to stick to the designed curve (the radius of a circle with an angle of 30° and an arc length of 100m is approximately 192m), and the dogleg degree of the trajectory is less than 30° / 100m. Because when the dogleg degree exceeds 30° / 100m, the construction difficulty increases, and the construction requirements can basically be met. The present invention can be applied to all hole group layout forms in the specifications, and the present embodiment can be applied to all hole group layout forms in the specifications, such as Figure 3 shown.

[0060] The horizontal length of branch holes in the advanced exploration and treatment project in the ground area is limited by the water-to-vertical ratio. The water-to-vertical ratio refers to the ratio of the horizontal projection length to the vertical depth. According to the "Technical Specifications for Orientation of Branch Holes in Coal Seam Floors" (DZ / T 0488-2024), the horizontal section length is determined with reference to the water-to-vertical ratio and should meet the following requirements:

[0061] 1) When the vertical depth is greater than 400m, the water-to-vertical ratio shall not be greater than 2:1, and the length of the branch hole should be less than 1500m;

[0062] 2) When the vertical depth is less than or equal to 400m, the water-to-vertical ratio is generally 2:1 and not greater than 3:1;

[0063] 3) When the hole bevel angle is greater than or equal to 90°, the length of the branch hole should be appropriately shortened.

[0064] According to the layout of the hole group of the advance exploration and treatment project in the specific ground area, the dogleg degree and water-to-vertical ratio of each branch hole can be preliminarily calculated. The dogleg degree of the branch hole = (100 / 2πr)*360°, r is the radius of the arc of the curved section; the water-to-vertical ratio = horizontal projection length / vertical depth. Therefore, when the dogleg degree determines the direction of the branch hole and the water-to-vertical ratio determines the length of the branch hole, it is also possible to preliminarily estimate the maximum treatment range that can be covered by a branch hole drilled on the upper side of the main hole during the ground area exploration and treatment design stage. The treatment range is roughly the area defined by the connecting line at the bottom of each branch hole, which provides great convenience for the overall layout of the regional treatment drilling plane, and can also improve the quality and efficiency and reduce the cost of the advance exploration and treatment project in the entire ground area. This method is simple, convenient and easy to master. It has also been well verified in design and construction practice, and is easy to promote.

[0065] Example 1: Taking the design of a coal mine area governance project as an example, after determining the governance scope, the hole position is selected according to terrain conditions. When designing, first draw a circle with a radius of 192m, intercept a part of the arc of the circle, and directly connect it to the place where the branch hole needs to turn, and then the design drawing can be quickly drawn.

[0066] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for fast and convenient plane mapping of advanced exploration and management technology in coal mine ground areas, characterized in that: The following steps are involved: Determine the hole group layout form of the coal mine; the hole group layout form includes a main hole and a plurality of branch holes; Draw the turning section between the main hole and the branch hole; Based on the main hole, branch holes and turning sections, an advanced exploration and management map of the ground area of ​​the coal mine is obtained.

2. The method for rapid and convenient plane mapping of advanced exploration and management technology for coal mine surface areas according to claim 1 is characterized in that: Determine the hole group layout form of the coal mine, specifically including the following steps: Determine the scope of governance through on-site investigation of coal mines; Select the orifice location from the treatment range according to the terrain conditions; According to the treatment scope, terrain conditions and hole mouth position, the main hole and branch holes are obtained as the hole group layout form.

3. The method for rapid and convenient plane mapping of advanced exploration and management technology for coal mine surface areas according to claim 2 is characterized in that: Draw the turning section between the main hole and the branch hole, including the following steps: Draw a turning segment between the main hole and the branch hole using a preset circle.

4. The method for rapid and convenient plane mapping of advanced exploration and management technology for coal mine surface areas according to claim 3 is characterized in that: By using a preset circle, a turning section is drawn between the main hole and the branch hole, which specifically includes the following steps: Draw a preset circle; According to the main hole and the branch hole, a part of the arc of the preset circle is intercepted; Move the arc between the main hole and the branch hole. The main hole is connected to the branch hole through the arc, and the arc serves as a turning segment.

5. The method for rapid and convenient plane mapping of advanced exploration and management technology for coal mine surface areas according to claim 4 is characterized in that: The radius of the preset circle is 192m.

6. The method for rapid and convenient plane mapping of advanced exploration and management technology for coal mine surface areas according to claim 1 is characterized in that: The following steps are also included: According to the layout of the hole group, the dogleg degree and water-slope ratio of the branch hole are obtained; According to the dogleg degree and water vertical ratio of the branch hole, the maximum treatment range covered by the branch hole is obtained.

7. The method for rapid and convenient plane mapping of advanced exploration and management technology for coal mine surface areas according to claim 6 is characterized by: The dogleg degree of the branch hole = (100 / 2πr)*360°; Where: r is the radius of the curved arc.

8. The method for rapid and convenient plane mapping of advanced exploration and management technology for coal mine surface areas according to claim 7 is characterized in that: The water-to-vertical ratio=horizontal projection length / vertical depth.

Images