Drilling hole layout method for penetrating exploration line and uncovering ore body in mineral exploration

Abstract

The invention discloses a drill hole layout method for penetrating an exploration line and uncovering an ore body in mineral exploration. The method comprises the following steps: step 1, determining a construction drill hole position and an ore body uncovering position; 2, determining a drilling azimuth angle; step 3, determining a drilling inclination angle; 4, determining the depth of the drilled hole; and step 5, plotting and drilling on the project layout profile map and the plane map. According to the method, the drilling direction, the inclination angle and the hole depth of the uncovered ore body can be accurately controlled, the problem that the control degree cannot be achieved due to the fact that drilling is not in place is greatly solved, the accuracy of the ore body control net degree is improved, drilling effectiveness is improved, guarantee is provided for later resource quantity estimation, and the economic benefit is increased. The method has very high applicability and operability in mineral exploration or mine deep exploration work, can greatly reduce the production cost and improve the exploration efficiency, and has very important significance in mineral exploration.

Description

Technical Field

[0001] The present invention relates to the technical field of mineral exploration, in particular to a method for laying out a drilling hole that penetrates an exploration line and exposes an ore body in mineral exploration. Background Art

[0002] Mineral resources are important raw materials for industrial production. As the national economy moves forward, mineral resources occupy an increasingly important position in industrial production. The country's demand for mineral products is also increasing year by year. This requires more and more mineral resources to be discovered to support the country's demand for mineral products.

[0003] Mineral exploration plays the role of a vanguard in the acquisition of mineral resources. Only by continuously achieving new achievements and breakthroughs in mineral exploration can the nation's demand for mineral resources be continuously met. Drilling is a crucial tool in mineral exploration. The effectiveness of borehole layout and construction directly impacts prospecting results and, more importantly, subsequent processes such as resource reserve estimation and mining. However, in actual mineral exploration, drilling is often impossible due to difficulties in setting up drilling rigs in certain areas, or due to inaccurate borehole layout, resulting in failure to achieve the desired control level.

[0004] Based on such situations, the present invention proposes a method for laying out drilling holes through exploration lines to expose ore bodies on the basis of a comprehensive study of predecessors' working methods and means to address such problems; this invention has played a very good role in solving the problem that some drilling rigs cannot be set up and cannot achieve the control level; and it provides an efficient method for the precise positioning of drilling holes through exploration lines to expose ore bodies; utilizing this method is of great significance for accurately controlling ore bodies, improving prospecting accuracy, and improving prospecting efficiency. Summary of the Invention

[0005] In view of this, the present invention provides a method for laying out a drilling hole through an exploration line to expose an ore body in mineral exploration.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A method for laying out a drilling hole through an exploration line to expose an ore body in mineral exploration comprises the following steps:

[0008] Step 1: Determine the location of the construction drill hole and the location of the exposed ore body

[0009] Step 1.1: Based on the mining site conditions and the location of the prospecting line where the ore body is to be exposed, select an prospecting line that is close to and suitable for setting up a drilling platform, and determine the location of the intended drilling hole. At the same time, determine the prospecting line grid density and prospecting line azimuth δ;

[0010] Step 1.2: Project the drill hole location horizontally onto the exploration line section where the ore body is to be exposed, according to the elevation. Then, connect the drill hole location on the section to the point where the ore body is to be exposed. Then, measure the distance M from the drill hole location to the point where the ore body is exposed. With M as the hypotenuse, construct a right triangle and measure the lengths of the vertical side H and the horizontal side F of the right triangle.

[0011] Step 2: Determine the drilling azimuth

[0012] Step 2.1: Based on the exploration line grid determined in Step 1.1, calculate the distance S between the exploration line where the planned drill hole is located and the exploration line where the ore body is to be exposed. Then, based on the length of the horizontal side F of the right triangle measured in Step 1.2, calculate the horizontal projection length A of the drill hole and the angle β between the drill hole and the exploration line.

[0013] Step 2.2: Calculate the borehole orientation θ based on the exploration line orientation δ in step 1.1 and the angle β between the borehole and the exploration line in step 2.1;

[0014] Step 3: Determine the drilling inclination

[0015] Step 3.1: Calculate the inclination angle α of the planned drill hole based on the vertical side H of the right triangle measured in Step 1.2 and the projected length A of the drill hole on the horizontal plane calculated in Step 2.1;

[0016] Step 3.2: Based on the distance M from the drill hole position in the profile in step 1.2 to the ore body exposure point and the distance S between the two exploration lines in step 1.1, calculate the angle ε between the drill hole and the exploration line profile where the ore body is to be exposed;

[0017] Step 4: Determine the Drilling Hole Depth

[0018] Step 4.1: Based on the borehole azimuth determined in Step 2 and the borehole inclination determined in Step 3, accurately locate the borehole that will penetrate the ore body through the exploration line. Then, based on the horizontal projection length A of the borehole in Step 2.1 and the vertical side H of the right triangle in Step 1.2, calculate the distance L from the planned borehole location to the location of the ore body to be exposed.

[0019] Step 4.2: Using the changed depth M 终 The final hole depth L is directly calculated from the angle ε between the drill hole in step 3.2 and the exploration line profile where the ore body is to be exposed. 终 ;

[0020] Step 5: Project drilling holes on the project layout cross-section and plan drawings

[0021] Step 5.1: Project the planned boreholes onto the engineering layout cross-section and plan. The boreholes have been projected onto the cross-section according to step 1.2. The final hole depth L calculated in step 4.1 is then终 Calculate the final projection length A of the borehole on the engineering deployment plan using the inclination angle α of the planned borehole in step 3.1 终 ;

[0022] Step 5.2: The final projected length A of the borehole on the engineering deployment plan according to step 5.1 终 According to the drilling orientation θ in step 2.2, the layout of the drilling holes is projected onto the engineering deployment plan.

[0023] Preferably, in step 2.1, the formula is as follows:

[0024]

[0025] Preferably, in step 2.2, the formula is as follows:

[0026] θ=δ+β③。

[0027] Preferably, in step 3.1, the formula is as follows:

[0028]

[0029] Preferably, in step 3.2, the calculation formula is as follows:

[0030]

[0031] Preferably, in step 4.1, the formula is as follows:

[0032]

[0033] Preferably, in step 4.2, the calculation formula is as follows:

[0034]

[0035] Preferably, in step 5.1, the calculation formula is as follows:

[0036] A 终 =L 终 *cosα ⑧.

[0037] Compared with the prior art, the present invention has achieved the following technical effects:

[0038] (1) The present invention can accurately control the azimuth, inclination and depth of the drilling hole that exposes the ore body, greatly solving the problem of inadequate control due to inadequate drilling, improving the accuracy of the ore body control network, improving the effectiveness of drilling, and providing a guarantee for the estimation of resource volume in the later stage;

[0039] (2) The present invention has strong applicability and operability in mineral exploration or deep mine exploration, can greatly reduce production costs and improve exploration efficiency, and is of great significance in mineral exploration;

[0040] (3) The method of the present invention has a good application effect in mining areas where ore body control is affected by poor construction conditions, greatly reducing the impact of unfavorable factors such as terrain or inadequate auxiliary engineering on mineral exploration. It is especially operational in surface or tunnel drilling construction, improving ore prospecting efficiency, reducing exploration costs, and providing a certain guarantee for achieving greater breakthroughs in mineral exploration. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a schematic diagram of the present invention drilling through the exploration line to expose the ore body;

[0042] Figure 2 This is the geological cross-section of line 29 of the mining area of the present invention;

[0043] Figure 3 This is the engineering deployment diagram of the middle section of the mining area 1100 of the present invention. DETAILED DESCRIPTION

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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 making creative efforts are within the scope of protection of the present invention.

[0045] The present invention discloses a method for laying out a drilling hole through an exploration line to expose an ore body in mineral exploration, comprising the following steps:

[0046] Step 1: Determine the location of the construction drill hole and the location of the exposed ore body

[0047] Step 1.1: Based on the construction site conditions of the mining area and the location of the exploration line where the ore body is to be exposed, try to select an exploration line that is close to and suitable for setting up a drilling platform, and determine the location of the planned drill hole. At the same time, the exploration line grid density (i.e., the spacing between each exploration line) and the exploration line orientation δ must be determined.

[0048] Step 1.2: Project the drill hole position horizontally onto the exploration line section where the ore body is to be exposed. Then connect the point where the ore body is to be exposed in the section (usually the midpoint of the ore body) from the hole position on the section. Then measure the distance M from the drill hole position to the ore body exposure point, and use M as the hypotenuse to make a right triangle, as shown in the figure below: Figure 1 As shown, measure the lengths of the vertical side H and horizontal side F of the right triangle in SECTION or CAD software;

[0049] Step 2: Determine the drilling azimuth

[0050] Step 2.1: Based on the exploration line grid determined in Step 1.1, calculate the distance S between the exploration line where the planned drill hole is located and the exploration line where the ore body is to be exposed. Then, based on the length of the horizontal side F of the right triangle measured in Step 1.2, calculate the horizontal projection length A of the drill hole and the angle β between the drill hole and the exploration line.

[0051] The formula is as follows:

[0052]

[0053] Step 2.2: Calculate the borehole orientation θ based on the exploration line orientation δ in step 1.1 and the angle β between the borehole and the exploration line in step 2.1;

[0054] The formula is as follows:

[0055] θ=δ+β③;

[0056] Step 3: Determine the drilling inclination

[0057] Step 3.1: Calculate the inclination angle α of the planned drill hole based on the vertical side H of the right triangle measured in Step 1.2 and the projected length A of the drill hole on the horizontal plane calculated in Step 2.1;

[0058] The formula is as follows:

[0059]

[0060] Step 3.2: Based on the distance M from the drill hole position in the profile in step 1.2 to the ore body exposure point and the distance S between the two exploration lines in step 1.1, calculate the angle ε between the drill hole and the exploration line profile where the ore body is to be exposed;

[0061] The formula is as follows:

[0062]

[0063] Step 4: Determine the Drilling Hole Depth

[0064] Step 4.1: Based on the borehole azimuth determined in Step 2 and the borehole inclination determined in Step 3, the borehole that will penetrate the ore body through the exploration line can be accurately located. Then, based on the horizontal projection length A of the borehole in Step 2.1 and the vertical side H of the right triangle in Step 1.2, the distance L from the intended borehole location to the intended ore body location can be calculated using the Pythagorean theorem.

[0065] The formula is as follows:

[0066]

[0067] According to relevant regulations, after drilling through the ore body, it is necessary to continue drilling to a certain depth. The depth varies according to each ore type. For this method, based on the calculations in steps 1-4, the azimuth and inclination of the drill hole (i.e., drill hole positioning) have been determined. If the drilling depth is changed, the azimuth and inclination of the drill hole will not change. The changed depth M can be used to determine the drilling depth. 终 The final hole depth L is directly calculated from the angle ε between the drill hole in step 3.2 and the exploration line profile where the ore body is to be exposed. 终 ;

[0068] The formula is as follows:

[0069]

[0070] Step 5: Project drilling holes on the project layout cross-section and plan drawings

[0071] Step 5.1: After determining the borehole orientation, inclination, and depth according to steps 1-4, the planned boreholes need to be projected onto the engineering layout cross-section and plan drawings. The boreholes have been projected onto the cross-section drawings according to step 1.2. The final hole depth L calculated in step 4.1 is then 终 Calculate the final projection length A of the borehole on the engineering deployment plan using the inclination angle α of the planned borehole in step 3.1 终 ;

[0072] The formula is as follows:

[0073] A 终 =L 终 *cosα ⑧;

[0074] Step 5.2: The final projected length A of the borehole on the engineering deployment plan according to step 5.1 终 According to the drilling orientation θ in step 2.2, the layout of the drill holes can be projected onto the project deployment plan.

[0075] Example 1:

[0076] This example takes the middle section of 1100 in a mine in Henan as an example. The ore body in the mining area is inclined to the northwest with an inclination of 56°. In the middle section of 1100, only line 31 has been developed to penetrate the vein and has the conditions for drilling in the pit. However, the ore body in line 29 needs to be controlled, and line 29 does not have a chamber for drilling. Therefore, the ore body can only be controlled by arranging drilling holes from line 31 through the exploration line to line 29. Therefore, the problem of arranging the drilling direction and inclination must be solved to accurately control the ore body. Figure 2 and Figure 3 shown.

[0077] The present invention provides a method for laying out a drilling hole through an exploration line to expose an ore body in mineral exploration, comprising the following steps:

[0078] 1. Determine the construction drilling location and the location of the exposed ore body;

[0079] 2. Determine the drilling azimuth;

[0080] 3. Determine the drilling inclination;

[0081] 4. Determine the drilling depth;

[0082] 5. Project the drilling holes on the engineering layout cross-section and plan drawings.

[0083] Furthermore, in step 1, the construction drilling location and the ore body exposure location are determined, including the following:

[0084] Step 1.1: Based on the construction site conditions of the mining area and the location of the exploration line where the ore body is to be exposed, try to select an exploration line that is close to and suitable for setting up a drilling platform, and determine the location of the planned drilling hole. At the same time, the exploration line grid density (i.e., the spacing between each exploration line) and the exploration line orientation δ must be determined;

[0085] Step 1.2: Project the drill hole location horizontally onto the exploration line section where the ore body is to be exposed, according to the elevation. Then, connect the drill hole location on the section to the point where the ore body is to be exposed (usually the midpoint of the ore body). Then, measure the distance M from the drill hole location to the ore body exposure point. With M as the hypotenuse, construct a right triangle. Measure the lengths of the vertical side H and the horizontal side F of the right triangle in SECTION or CAD software.

[0086] According to the middle section of the mining area 1100, the 31-line chamber was selected as the planned drilling location. The spacing between each exploration line was determined to be 50m, and the exploration line orientation was 133°. The planned drilling location was projected into the 29-line section at the middle elevation, and the relevant lengths were measured according to the above steps.

[0087] Furthermore, step 2, determining the drilling azimuth, specifically includes the following steps:

[0088] Step 2.1: Based on the determined exploration line grid, calculate the distance S between the exploration line where the planned drill hole is located and the exploration line where the ore body is to be exposed. Then, based on the length of the horizontal side F of the right triangle measured in Step 1.2, calculate the horizontal projection length A of the drill hole and the angle β between the drill hole and the exploration line.

[0089] The formula is as follows:

[0090]

[0091] Step 2.2: Calculate the borehole orientation θ based on the exploration line orientation δ and the angle β between the borehole and the exploration line;

[0092] The formula is as follows:

[0093] θ=δ+β③;

[0094] Furthermore, step 3, determining the drilling inclination angle includes the following steps:

[0095] Step 3.1: Calculate the inclination angle α of the planned drill hole based on the measured vertical side H of the right triangle and the calculated projection length A of the drill hole on the horizontal plane;

[0096] The formula is as follows:

[0097]

[0098] Step 3.2: Based on the distance M from the drill hole position in the profile to the ore body exposure point and the distance S between the two exploration lines, calculate the angle ε between the drill hole and the exploration line profile where the ore body is to be exposed;

[0099] The formula is as follows:

[0100]

[0101] Furthermore, in step 4, the borehole depth is determined. Based on the determined borehole azimuth and inclination, the borehole that penetrates the ore body through the exploration line can be accurately located. Then, based on the projected length A of the borehole on the horizontal plane and the vertical side H of the right triangle in the cross section of the exploration line where the ore body is to be exposed, the distance L from the borehole position to the target exploration line ore body exposure point is calculated according to the Pythagorean theorem.

[0102] The formula is as follows:

[0103]

[0104] According to relevant regulations, after drilling through the ore body, it is necessary to continue drilling to a certain depth. The depth varies according to each ore type. For this method, based on the calculations in steps 1-4, the azimuth and inclination of the drill hole (i.e., drill hole positioning) have been determined. If the drilling depth is changed, the azimuth and inclination of the drill hole will not change. The changed depth M can be used to determine the drilling depth. 终 The final hole depth L is directly calculated from the angle ε between the drill hole in step 3.2 and the exploration line profile where the ore body is to be exposed. 终 ;

[0105] The formula is as follows:

[0106]

[0107] Furthermore, step 5, projecting the drilling holes onto the engineering layout cross-section and plan drawings, includes the following steps:

[0108] Step 5.1: After determining the borehole orientation, inclination, and hole depth according to steps 1-4, it is necessary to project the drill holes into the engineering layout cross-section and plan. Step 1 has projected the drill holes into the cross-section, and then according to the calculated final hole depth L 终 and the inclination angle α of the borehole layout to calculate the final projection length A of the borehole on the engineering deployment plan 终 ;

[0109] The formula is as follows:

[0110] A 终 =L 终 *cosα ⑧;

[0111] Step 5.2: Based on the final projected length Afinal of the drill holes on the engineering deployment plan and the drill hole orientation θ, the drill holes can be projected onto the engineering deployment plan, completing the drill hole layout.

[0112] According to the above steps, the DZK2903 borehole was finally accurately positioned, and the planned borehole azimuth was calculated to be 182°, with an inclination of 67°. The projected length of the borehole on the 1100 middle section project deployment map was 144.2m, and the layout of the borehole that penetrates the ore body through the exploration line was accurately completed.

[0113] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A method for laying out a drilling hole through an exploration line to expose an ore body in mineral exploration, characterized in that: The steps include: Step 1: Determine the location of the construction drill hole and the location of the exposed ore body Step 1.1: Based on the mining site conditions and the location of the prospecting line where the ore body is to be exposed, select an prospecting line that is close to and suitable for setting up a drilling platform, and determine the location of the intended drilling hole. At the same time, determine the prospecting line grid density and prospecting line azimuth δ; Step 1.2: Project the drill hole location horizontally onto the exploration line section where the ore body is to be exposed, according to the elevation. Then, connect the drill hole location on the section to the point where the ore body is to be exposed. Then, measure the distance M from the drill hole location to the point where the ore body is exposed. With M as the hypotenuse, construct a right triangle and measure the lengths of the vertical side H and the horizontal side F of the right triangle. Step 2: Determine the drilling azimuth Step 2.1: Based on the exploration line grid determined in Step 1.1, calculate the distance S between the exploration line where the planned drill hole is located and the exploration line where the ore body is to be exposed. Then, based on the length of the horizontal side F of the right triangle measured in Step 1.2, calculate the horizontal projection length A of the drill hole and the angle β between the drill hole and the exploration line. Step 2.2: Calculate the borehole orientation θ based on the exploration line orientation δ in step 1.1 and the angle β between the borehole and the exploration line in step 2.1; Step 3: Determine the drilling inclination Step 3.1: Calculate the inclination angle α of the planned drill hole based on the vertical side H of the right triangle measured in Step 1.2 and the projected length A of the drill hole on the horizontal plane calculated in Step 2.1; Step 3.2: Based on the distance M from the drill hole position in the profile in step 1.2 to the ore body exposure point and the distance S between the two exploration lines in step 1.1, calculate the angle ε between the drill hole and the exploration line profile where the ore body is to be exposed; Step 4: Determine the Drilling Hole Depth Step 4.1: Based on the borehole azimuth determined in Step 2 and the borehole inclination determined in Step 3, accurately locate the borehole that will penetrate the ore body through the exploration line. Then, based on the horizontal projection length A of the borehole in Step 2.1 and the vertical side H of the right triangle in Step 1.2, calculate the distance L from the planned borehole location to the location of the ore body to be exposed. Step 4.2: Using the changed depth M 终 The final hole depth L is directly calculated from the angle ε between the drill hole in step 3.2 and the exploration line profile where the ore body is to be exposed. 终 ; Step 5: Project drilling holes on the project layout cross-section and plan drawings Step 5.1: Project the planned boreholes onto the engineering layout cross-section and plan. The boreholes have been projected onto the cross-section according to step 1.

2. The final hole depth L calculated in step 4.1 is then 终 Calculate the final projection length A of the borehole on the engineering deployment plan using the inclination angle α of the planned borehole in step 3.1 终 ; Step 5.2: The final projected length A of the borehole on the engineering deployment plan according to step 5.1 终 According to the drilling orientation θ in step 2.2, the layout of the drilling holes is projected onto the engineering deployment plan.

2. The method for laying out a drilling hole through an exploration line to expose an ore body in mineral exploration according to claim 1, characterized in that: In step 2.1, the formula is as follows:

3. The method for laying out a drilling hole through an exploration line to expose an ore body in mineral exploration according to claim 1, characterized in that: In step 2.2, the formula is as follows: θ=δ+β③。 4. The method for laying out a drilling hole through an exploration line to expose an ore body in mineral exploration according to claim 1, characterized in that: In step 3.1, the formula is as follows:

5. The method for laying out a drilling hole through an exploration line to expose an ore body in mineral exploration according to claim 1, characterized in that: In step 3.2, the calculation formula is as follows:

6. The method for laying out a drilling hole through an exploration line to expose an ore body in mineral exploration according to claim 1, characterized in that: In step 4.1, the formula is as follows:

7. The method for laying out a drilling hole through an exploration line to expose an ore body in mineral exploration according to claim 1, characterized in that: In step 4.2, the calculation formula is as follows:

8. The method for laying out a drilling hole through an exploration line to expose an ore body in mineral exploration according to claim 1, characterized in that: In step 5.1, the calculation formula is as follows: A 终 =L 终 *cosα ⑧。

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