Gold mine exploration method and system

Abstract

The invention discloses a gold mine exploration method and system, and relates to the technical field of prospecting exploration, and the method comprises the steps: carrying out the comprehensive research of a research region, and obtaining a prospecting target region; large-scale soil measurement is carried out on the prospecting target area, geochemical anomalies are identified, and the prospecting range is narrowed to determine the positions of the anomalies; constructing an exploring groove at the abnormal position by utilizing a groove exploring project to reveal a surface covering layer so as to find out occurrence and distribution characteristics of the underground ore body; when the occurrence and distribution characteristics of the underground ore body are not found out in the groove exploration construction, the occurrence and distribution characteristics of the underground ore body are found out by adopting a geophysical prospecting accurate measurement profile; and exposing the found underground ore body at the abnormal position through drilling engineering. According to the method, the adverse effect on the ecological environment can be minimized, and green development of geological exploration is promoted.

Description

Technical Field

[0001] The present invention relates to the technical field of prospecting and exploration, and in particular to a gold mine exploration method and system. Background Art

[0002] The West Qinling Mountains are rich in gold resources. It is also an important natural forest area and pastoral area in my country, an important green barrier of the Loess Plateau, and the main source of supply for the Yellow River and the Yangtze River. Its ecological position is very important. Therefore, efforts must be made to promote green exploration to achieve a win-win situation of protecting the ecological environment and ensuring resource supply, which challenges the previous prospecting methods. Based on this, a green exploration technology method for gold mines suitable for the vegetation-covered areas of the West Qinling Mountains is urgently needed.

[0003] In the prior art, traditional gold prospecting is mainly carried out through geological mapping and geochemical scanning or profiling. First, geochemical anomalies are obtained, and then the anomalies are verified and revealed through field inspection and trenching projects. Finally, drilling projects are arranged according to the ore found in the trenching projects.

[0004] However, the above-mentioned prospecting technologies will cause certain disturbances or adverse effects on the surface of the construction site, vegetation and the surrounding environment, resulting in damage to the natural environment caused by mineral exploration. Summary of the invention

[0005] The embodiment of the present invention provides a gold mine exploration method and system, which can solve the problem in the prior art that the existing mineral exploration process harms the natural environment.

[0006] The present invention provides a method for prospecting gold mines, comprising the following steps:

[0007] Obtain prospecting target areas;

[0008] Identify the location of soil chemical element anomalies in the prospecting target area to determine the location of the anomalies;

[0009] At the location of the anomaly, obtain the occurrence and distribution characteristics of the underground ore body;

[0010] According to the occurrence and distribution characteristics of the underground ore body, gold mines are explored at the abnormal location through drilling projects; wherein, the drilling projects include: using modular or crawler self-propelled construction equipment, and using directional drilling technology for construction; laying anti-seepage materials on the ground in the construction area to prevent oil leakage from the construction equipment; using recovery devices to recover waste liquid and waste; and using exhaust gas purification devices to treat exhaust gas from construction equipment, and using noise reduction equipment to treat construction noise.

[0011] Furthermore, the determination of the location of the anomaly specifically includes: conducting large-scale soil measurements on the prospecting target area, identifying geochemical anomalies, and narrowing the prospecting scope to determine the location of the anomaly, wherein the geochemistry represents the spatial variation of the content of different elements.

[0012] Furthermore, the specific steps of obtaining the occurrence and distribution characteristics of the underground ore body include: using trenching engineering to construct trenches at the location of the anomaly to expose the surface cover layer to find out the occurrence and distribution characteristics of the underground ore body; when the occurrence and distribution characteristics of the underground ore body are not found out by trenching construction, using geophysical methods to accurately measure the underground ore body to find out the occurrence and distribution characteristics of the underground ore body.

[0013] Furthermore, the trenching project is used to carry out trenching at the location of the anomaly to expose the surface covering layer, and the specific steps include:

[0014] When there are no protective plants on the ground where the anomaly is located, the rock and soil produced by digging the exploration trench will be collected using a degradable material collection device, and the collection device will be piled on the slopes on both sides of the exploration trench;

[0015] Complete the trench construction and backfill the trench using the reverse backfill compaction method;

[0016] When there are protective plants on the ground at the location of the anomaly, drilling is used instead of trenching.

[0017] Furthermore, the use of geophysical methods to precisely measure underground ore bodies specifically includes: conducting geophysical precise profile analysis of underground ore bodies based on physical property differences, size, burial depth, interference level, geoelectric conditions, traffic conditions and cost of the detection target body.

[0018] Furthermore, the acquisition of the prospecting target area specifically comprises the following steps:

[0019] Prepare mineral geological maps of the study area based on historical geological data;

[0020] Find typical ore deposits with mineral deposits, use the mineral geological map as the base map, take the ore-forming geological body, ore-forming structure, ore-forming structural surface and ore-forming characteristic signs as multiple ore-forming conditions, and use graphic drawing software to compile the ore-forming element map of typical ore deposits;

[0021] Using the metallogenic element map as the base map, and combining various geological exploration methods used in prospecting, a comprehensive information map of prospecting prediction for typical mineral deposits is compiled using graphic drawing software; a geological metallogenic prediction model for typical mineral deposits is constructed based on a plurality of the mineralization conditions, and a prospecting prediction model for typical mineral deposits is constructed in combination with a plurality of the geological exploration methods;

[0022] Obtain the geological elements related to mineralization in the study area, and compile a regional mineralization element map based on the geological elements; use the regional mineralization element map as the base map, and combine the mineral prediction method type and mineralization law to compile a regional mineral prediction element map; construct a regional mineralization model based on multiple geological elements, and construct a regional prospecting prediction model based on the mineral prediction method type and mineralization law;

[0023] In the area where it is necessary to predict whether minerals exist, prediction factor variables are constructed based on spatial information processing technology GIS and mineral quantitative prediction methods, and the comprehensive information map of prospecting prediction of typical mineral deposits and the regional mineral prediction factor map are superimposed. The prospecting prediction model of typical mineral deposits and the regional prospecting prediction model are used to circle the minimum prediction area and select the prospecting target area.

[0024] Furthermore, after the completion of the drilling project, it is necessary to carry out well logging work of natural potential, compensated acoustic wave, three-lateral resistivity, apparent resistivity, well fluid resistivity, magnetic susceptibility, polarizability, well diameter, well inclination and well temperature to analyze the geological conditions.

[0025] An embodiment of the present invention provides a gold mine exploration system, comprising:

[0026] Target area acquisition module, used to acquire prospecting target areas;

[0027] Anomaly recognition module, used to identify the location of soil chemical element anomalies in the prospecting target area to determine the location of the anomalies;

[0028] The ore body exposure module is used to obtain the occurrence and distribution characteristics of underground ore bodies at the location of anomalies;

[0029] The ore body identification module is used to explore gold mines at abnormal locations through drilling projects based on the occurrence and distribution characteristics of underground ore bodies; wherein the drilling projects include: using modular or crawler self-propelled construction equipment and utilizing directional drilling technology for construction; laying anti-seepage materials on the ground in the construction area to prevent oil leakage from the construction equipment; using recovery devices to recover waste liquid and waste; and using exhaust gas purification devices to treat exhaust gas from construction equipment, and using noise reduction equipment to treat construction noise.

[0030] The embodiment of the present invention provides a gold mine exploration method and system, which have the following beneficial effects compared with the prior art:

[0031] After the location of the anomaly is determined in the prospecting target area, in order to conduct green exploration, drilling projects with less destructiveness to the environment are selected during the mineral exploration process. The drilling projects specifically include: using modular or crawler self-propelled construction equipment and utilizing directional drilling technology for construction; laying anti-seepage materials on the ground in the construction area to prevent oil leakage from construction equipment; using recovery devices to recycle waste liquid and waste; and using exhaust purification devices to treat exhaust gas from construction equipment, and using noise reduction equipment to treat construction noise; through the selection of technology and equipment, the exploration process is less destructive and green exploration is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A flowchart provided for an embodiment of the present invention;

[0033] Figure 2 A diagram showing the overall concept of resource potential evaluation provided by the embodiment of the present invention;

[0034] Figure 3 A trenching construction diagram provided in an embodiment of the present invention, wherein a is before trenching construction, b is during trenching construction, and c is after trenching construction;

[0035] Figure 4 A cross-sectional view of the D-dixi exploration line provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0037] See also Figure 1 The embodiment of the present invention provides a method for prospecting gold mines, comprising the following steps:

[0038] Step 1: Obtain prospecting target areas after comprehensive research in the study area of ​​West Qinling Mountains.

[0039] Step 2: Conduct large-scale soil surveys in the prospecting target area to identify anomalies in soil chemical elements and narrow the prospecting scope to determine the location of the anomaly.

[0040] Step three: Use trenching to expose the surface cover layer at the location of the anomaly in order to identify the occurrence and distribution characteristics of the underground ore body; when the occurrence and distribution characteristics of the underground ore body are not identified by trenching, use geophysical methods to accurately measure the underground ore body to identify the occurrence and distribution characteristics of the underground ore body.

[0041] Step 4: Based on the occurrence and distribution characteristics of the underground ore body, the underground ore body is exposed and identified at the abnormal location through drilling engineering. The drilling engineering includes: using modular or crawler self-propelled construction equipment to use directional drilling technology for construction; laying anti-seepage materials on the ground in the construction area to prevent oil leakage from construction equipment, using recovery equipment to recycle waste liquid and waste, using exhaust purification equipment to treat exhaust gas from construction equipment, etc., and using noise reduction equipment to treat construction noise.

[0042] The specific contents of mineral exploration are as follows:

[0043] 1. Optimization of prospecting target areas is the most important and critical link in the green exploration technology of gold mines in the vegetation-covered areas of the Western Qinling Mountains. Therefore, doing a good job in the optimization of pre-prospecting target areas can achieve twice the result with half the effort, save a lot of useless work, and guide point-to-point mineral exploration and surface mineral prediction. This method pays more attention to preliminary research, improves the purposefulness of work, avoids repetitive work, and compiles relevant maps such as mineral geological maps of the study area through systematic collection and comprehensive analysis of existing geological, geophysical, geochemical, remote sensing and other relevant data in the work area; selects typical mineral deposits for research, based on the study of mineralization geological bodies, with mineralization structures and mineralization structural surfaces as the core, and based on the characteristic signs of mineralization, constructs the mineralization model and prospecting prediction model of typical mineral deposits, and compiles mineralization element maps of typical mineral deposits and comprehensive information maps of prospecting prediction. Summarize other geological elements related to mineralization in the study area, summarize regional mineralization elements, and compile a regional mineralization element map; summarize the mineralization laws and compile a comprehensive geological information mineral prediction element map, and establish a regional mineral exploration prediction model; classify the types of mineral prediction methods, and compile a regional mineral prediction element map; apply GIS spatial information processing technology and mineral quantitative prediction methods, construct prediction element variables, delineate the minimum prediction area, and optimize the mineral exploration target area.

[0044] 2. Carry out large-scale soil surveys on the selected prospecting target areas to further concentrate the prospecting target areas and narrow the prospecting scope. Compared with traditional methods, this method emphasizes green exploration, minimizes environmental impact, and selects sampling methods and sampling tools that have little environmental disturbance; sampling points should avoid vegetation as much as possible, and backfill after deep sampling; when it is impossible to avoid, pre-expose the layer and remove the vegetation, and after sampling, level the sampling pit and restore it; when marking the sampling pit, use degradable materials.

[0045] 3. Anomaly verification: In areas with good rock (ore) outcrops, it is mainly carried out through field surveys, collecting targeted mineralized rocks (ores), and conducting anomaly inspections; in areas with good rock (ore) outcrops covered by vegetation, it is mainly through larger-scale soil profile measurements. The working method is consistent with the above-mentioned large-scale soil measurement method, and the anomalies are continuously concentrated or the reproducibility of the anomalies is checked to provide a basis for the layout of the first-step trenching project.

[0046] 4. For geochemical anomalies delineated by large-scale soil surveys and discovered mineralization clues, trenching projects are used for surface exposure. Compared with traditional methods, this method emphasizes minimizing disturbances to the ecological environment and repairing the disturbed ecological environment. The specific methods are as follows: The West Qinling Mountains are steep, with dense vegetation and inconvenient transportation. It is advisable to use manual excavation to avoid damage to the land and vegetation landscape caused by road construction and mechanical construction. The rock and soil produced by trench excavation are bagged with degradable woven bags and stacked in turn in relatively flat and stable areas on both sides of the trench, while ensuring the stability of the fill slope. Trench construction is carried out from top to bottom, and the trench slope safety management and control are carried out. The slope is set according to regulations, the loose soil and rocks on the slope are cleared in time, and temporary support is provided for unstable slopes to prevent landslide accidents. After the geological observation, cataloging, sampling and acceptance of the trenches, the trenches that do not need to be retained should be backfilled and compacted in reverse order in a timely manner, and the photos of the trenches before and after backfilling should be kept. The trenches that must be retained should be clearly marked, and the trenches with large depths that must be retained should be well fenced to prevent people and animals from entering by mistake and causing harm. Since the excavation area of ​​the trenching project is relatively large and the vegetation is severely damaged, the principle is to clarify the occurrence of the mineral (chemical) body, minimize the construction of the trenching project, and try to "replace trenching with drilling" to reduce the damage to vegetation caused by trenching.

[0047] 5. When the occurrence of the local ore body (chemical) is unclear, carry out geophysical precision profile survey according to the physical property differences, size, burial depth, interference level, geoelectric conditions, traffic conditions and cost of the detection target body to provide a basis for drilling deployment.

[0048] 6. Arrange drilling projects based on the occurrence of ore bodies revealed by surface trenching projects, control the discovered mineral (mineralized) bodies, and identify the scale, shape, occurrence and grade changes of the mineral (mineralized) bodies. Compared with traditional methods, this method emphasizes minimizing disturbance to the ecological environment and repairing the disturbed ecological environment. The specific methods are as follows: Drilling construction equipment should be easy to carry, install and disassemble and occupy a small area, provided that the purpose of geological exploration is met; equipment transportation should make use of existing roads as much as possible, and modular portable or crawler self-propelled equipment should be used for areas that are difficult for drilling equipment to enter, so as to avoid and reduce the construction of new roads; directional drilling technology should be used for steeply inclined deposits to achieve "one base with multiple holes and one hole with multiple branches" to reduce equipment relocation; during drilling construction in vegetation-covered areas (grassland, woodland and cultivated land), anti-slip and anti-pressure facilities such as wooden boards or wire mesh should be installed on pedestrian walkways, transportation passages, operation sites and oil storage depots, and steel mesh should be installed when conditions permit; the specifications of the steel mesh should be determined comprehensively based on the drilling rig model, installation conditions, site area and other conditions; oil storage should avoid low-lying areas as much as possible to prevent rainwater from washing away and polluting the surface; anti-seepage materials, such as geotextiles with a thickness of greater than or equal to 3 mm, should be laid on the ground of construction operation sites and material storage sites. For oil storage areas, circulation ditches, slurry pools, garbage pools and other surfaces prone to leakage pollution, anti-seepage geotextiles (geotextiles with one membrane and one cloth or two membranes sandwiching one cloth, with a thickness greater than or equal to 5mm) or high-density polyethylene (HDPE) geomembranes are used as anti-seepage pads for anti-seepage treatment to prevent leakage pollution. Oil-absorbing felt must be laid under the machine and in the equipment maintenance area. The drilling fluid circulation system should use mobile mud boxes and pipelines to avoid on-site excavation as much as possible; if excavation is really necessary, its volume shall be calculated according to the designed depth of the borehole, and anti-seepage materials shall be laid on the bottom for anti-seepage treatment; when mud is used as the flushing fluid for drilling construction, high-quality environmentally friendly slurry shall be used.Drilling fluid materials and treatment agents comply with the provisions of GB / T5005; wastewater generated during drilling construction that cannot be recycled and needs to be discharged shall be treated to meet the requirements of GB8978 to avoid contaminating soil and surface (ground) water; sediment and waste slurry generated during drilling construction shall be set up in special storage tanks, and after sedimentation and solidification treatment, they shall meet the requirements of GB18599; those that do not meet the requirements are strictly prohibited from being discharged; solid waste such as waste materials, domestic garbage, drilling slag generated during construction shall be cleaned up in a timely manner, stored in a classified manner, recycled, and disposed of on-site and transported in accordance with relevant management regulations; construction equipment shall be powered by diesel and gasoline. Equipment, if necessary, exhaust purification devices and exhaust pipes shall be installed, and exhaust gas emissions shall comply with the requirements of GB3095; oil substances, chemicals and other materials that produce smoke and toxic and harmful exhaust gases shall not be burned at the construction site; construction noise near residential areas, animal breeding areas, wildlife habitats, etc. shall comply with the requirements of GB3096; after the drilling is completed, the hole shall be sealed according to the relevant design, the whole hole shall be sealed, and permanent signs shall be set to ensure the quality of the sealing, so as to restore the groundwater environment or reduce the disturbance caused by the drilling construction on the groundwater environment, and artificial grass and trees shall be planted to restore the original appearance. In short, the use of advanced drilling technology, equipment and methods to carry out geological exploration work can effectively reduce the degree, scope and duration of ecological environmental impact.

[0049] 7. After the drilling work is completed, the natural potential, compensated acoustic wave, three-way resistivity, apparent resistivity, well fluid resistivity, magnetic susceptibility, polarizability, well diameter, well inclination, well temperature and other well logging are carried out in time, and the lithology, structure, ore body, etc. are interpreted by using the logging data, and the geophysical prospecting data are interpreted in combination with the ground precision profile to establish the geophysical prospecting mark of gold; at the same time, the primary halo measurement is carried out. There are currently two main testing methods: one is to collect combined samples at multiple points within a certain range, and the laboratory analyzes the relevant elements by using supporting analysis such as plasma mass spectrometry and fluorescence spectroscopy; the other is to use a portable X-ray fluorescence analyzer for on-site non-destructive analysis and test the relevant elements. There are primary halos dominated by ore-forming elements around gold and other deposits (bodies), especially around hydrothermal deposits, where large-scale primary geochemical anomalies are developed. Through the study of the zonation law of the primary halo, we can infer the depth of ore body erosion, determine the occurrence of deep ore bodies, find hidden ore bodies, etc., which can provide a basis for the next step of engineering layout, continuously improve the mineral exploration prediction model, improve the quality of mineral exploration target area optimization, and ultimately achieve a breakthrough in mineral exploration.

[0050] The present invention aims to implement environmental impact minimization control throughout the exploration process by using advanced exploration means, methods, equipment and processes, thereby minimizing disturbance to the ecological environment and repairing the disturbed ecological environment, thereby achieving a win-win situation of protecting the ecological environment and ensuring resource supply.

[0051] An embodiment of the present invention provides a gold mine exploration system, comprising:

[0052] The target area acquisition module is used to acquire the prospecting target area. The anomaly identification module is used to identify the location of the soil chemical element anomaly in the prospecting target area to determine the location of the anomaly. The ore body exposure module is used to obtain the occurrence and distribution characteristics of the underground ore body at the location of the anomaly. The ore body identification module is used to explore the gold mine at the location of the anomaly through drilling engineering based on the occurrence and distribution characteristics of the underground ore body; wherein the drilling engineering includes: using modular or crawler self-propelled construction equipment and using directional drilling technology for construction; laying anti-seepage materials on the ground in the construction area to prevent oil leakage of construction equipment; using recovery equipment to recover waste liquid and waste; and using exhaust purification equipment to treat the exhaust gas of construction equipment, and using noise reduction equipment to treat construction noise.

[0053] A specific embodiment is as follows:

[0054] Take the project of "Survey and Evaluation of a Key Survey Area of ​​a Gold Mine in Location D" as an example:

[0055] 1. Optimization of prospecting target areas

[0056] (1) Data collection and preparation of relevant maps. Comprehensively collect data on regional geology, geophysics, geochemistry, remote sensing, mineral exploration and development, scientific research, etc. in the work area. Prepare 1:250,000 / 200,000 regional structural maps, 1:50,000 structural maps and other related maps, such as Figure 2 shown.

[0057] (2) Selection of typical ore deposits: ① They should be representative in terms of metallogenic geological background, metallogenic geological process, mineralization and alteration characteristics, and prospecting signs, and the metallogenic elements and prospecting prediction elements can be compared with those in the survey area; ② The mineral exploration level is high, the geological characteristics of the ore deposits are studied comprehensively, and the resource reserves should reach a medium scale; ③ The scientific research level is high, and there is a certain understanding of the genesis, metallogenic age, metallogenic process, and prospecting signs of the ore deposits. The typical ore deposits are identified as A, B, C, D, etc. Based on the study of ore-forming geological bodies, with metallogenic structures and metallogenic structural surfaces as the core, and with the characteristic signs of metallogenic process as the basis, the metallogenic model and prospecting prediction model of regional and typical ore deposits are constructed, and the metallogenic element map and prospecting prediction comprehensive information map of regional and typical ore deposits are compiled.

[0058] (3) Classification of mineral prediction method types and mineral prediction types. Based on the classification of mineralization geological processes, in accordance with the principles of mineral deposit type classification, and based on the work that has been completed, the types of mineral exploration prediction are determined for different mineralization geological backgrounds and mineralization geological characteristics, and are divided into metamorphic type, stratum-controlled endogenous type, volcanic rock type, intrusive rock type, composite endogenous type, and sedimentary type. Through the study of typical mineral deposits in the study area, it is determined that the type of mineral prediction method in the study area is composite endogenous type.

[0059] (4) Delineate the latest prediction area. Under the guidance of regional prospecting prediction, extract each prediction element closely related to mineralization from the prediction base map and related professional maps one by one to form a series of element layers. Compare various elements, prospecting signs and typical deposits, analyze them one by one, and extract favorable mineralization elements through GIS software, including structure, construction, magmatic rock, ore deposit, mineralization and alteration. According to the mineral prediction type and prediction evaluation model, the mineralization geological body, mineralization structure, mineralization structural surface and mineralization characteristic signs are expressed in the form of points, lines and surfaces under the GIS environment. Use the comprehensive geological information prediction method to calculate the unit mineralization favorableness as the basic basis for delineating the target area. After calculating the mineralization favorableness of each prediction unit, it is necessary to distinguish between mineralization potential units (i.e. mineralization favorable units) and non-potential units (i.e. mineralization unfavorable units). The determination of the threshold provides a critical value for delineating the prediction area. After the target area is delineated, it is necessary to use the natural boundary method of the geological body for correction to ensure that the prediction results conform to the geological mineralization law.

[0060] (5) Optimization of prospecting target areas. The regional metallogenic geological background, target area metallogenic geological conditions, mineral deposits, alteration characteristics, physical and chemical anomalies and other factors were systematically evaluated and compared with the predicted factors of the corresponding ore deposit model one by one. The identified prospecting target areas were identified and screened, and prospecting target areas such as D were selected.

[0061] 2. Carry out 1:25000 soil survey on the prospecting target area of ​​site D to further concentrate the prospecting target area and narrow the prospecting scope. Try to avoid vegetation at the sampling points, and backfill after deep sampling; when it is impossible to avoid, pre-peel and remove vegetation. After sampling, level the sampling pit and restore it; when marking the sampling pit, use degradable materials. Four comprehensive anomalies were identified. The Au anomaly has a large area, high intensity, and obvious three-level concentration zoning. Many maximum values ​​reach the detection limit of 300ppb, which is well matched with As, Sb, etc. The anomaly is generally distributed in a northwest-west strip, which is consistent with the direction of the tectonic line.

[0062] 3. We conducted field surveys on the anomalies identified by soil survey at site D, collected gold basic analysis samples and gold nugget samples with gold grades ranging from 0.11 to 4.74 g / t, and discovered clues to gold mineralization at site D.

[0063] 4. For the discovered mineralization clues in the west of D, trench exploration was implemented to expose the surface. Manual excavation was used this time, and the rock and soil produced by trench excavation were bagged with biodegradable woven bags and stacked in sequence in relatively flat and stable areas on both sides of the trench, while ensuring the stability of the backfill slope. The trench construction was carried out from top to bottom, and the trench slope safety management and control was carried out. The slope was lowered according to regulations, and the loose soil and rocks on the slope were removed in time. Temporary support was provided for unstable slopes to prevent landslide accidents. After the geological observation, compilation, sampling and acceptance of the trench were completed, it was backfilled and compacted in reverse order in time, and the photos of the trench before and after backfilling were retained. The occurrence of the mineral (chemical) body was clear, so there was no need to carry out geophysical precision profile measurement. Figure 3 shown.

[0064] 5. Conduct deep control on the discovered mineral (chemical) bodies to find out the scale, shape, occurrence and grade changes of the mineral (chemical) bodies. The west mountain of D is high and densely forested, and it is difficult for drilling equipment to enter. In order to reduce the construction of new roads, a portable mechanical core drill is used, the drill is disassembled, and crawler creepers are used for relocation, which minimizes the damage to vegetation caused by road construction and the small footprint of the machine. At the same time, the implementation of "one base and multiple holes" reduces the number of bases and relocation, greatly improving economic benefits. At the same time, environmentally friendly mud dyeing is used during the construction process. Mud pools, sedimentation tanks, circulation tanks, and waste slurry pools are stored in single or double tanks to avoid mud infiltration and cross contamination. After the drilling construction is completed, the waste mud is prohibited from being discharged directly, but is centrally treated to ensure that it does not affect or pollute the surface vegetation. At the same time, artificial grass and trees are used to restore the original appearance.

[0065] 6. After the drilling work is completed, well logging such as natural potential apparent resistivity is carried out in time, and the logging data is used to interpret the lithology, structure, ore body, etc. At the same time, a bedrock spectrum sample is collected every 5m in the borehole, and the sampling is intensified in the fracture contact zone, alteration zone and parts with signs of mineralization. The laboratory uses plasma mass spectrometry, fluorescence spectroscopy and other supporting analysis to analyze 10 elements such as Au, Ag, Cu, Pb, As, Sb, W, Mo, and Co. Au has a positive correlation with As, Sb and other elements. The elements such as Au, As, Sb near the ore body are generally highly abnormal, which corresponds well to the ore body. From 426.78m onwards, the elements such as Au, As, and Sb in ZK001 borehole are generally highly abnormal until the end of the hole, indicating that ZK001 has not yet passed through the mineralized alteration zone, and there is a large prospecting space in the deep, which provides a basis for the next step of engineering layout. Through geophysical exploration in the borehole and primary halo measurement, the prospecting prediction model is continuously improved, thereby continuously improving the quality of prospecting target area selection and improving prospecting efficiency. Figure 4 shown.

[0066] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A method for prospecting gold mines, characterized in that: The following steps are involved: Obtain prospecting target areas; Identify the location of soil chemical element anomalies in the prospecting target area to determine the location of the anomalies; At the location of the anomaly, obtain the occurrence and distribution characteristics of the underground ore body; According to the occurrence and distribution characteristics of underground ore bodies, gold mines are explored at abnormal locations through drilling projects; Among them, the drilling project includes: using modular or crawler self-propelled construction equipment and utilizing directional drilling technology for construction; laying anti-seepage materials on the ground in the construction area to prevent oil leakage from the construction equipment; using recovery devices to recycle waste liquid and waste; and using exhaust gas purification devices to treat exhaust gas from construction equipment, and using noise reduction equipment to treat construction noise.

2. A gold mine exploration method as claimed in claim 1, characterized in that: The determination of the location of the anomaly specifically includes: conducting large-scale soil measurements on the prospecting target area, identifying geochemical anomalies, and narrowing the prospecting scope to determine the location of the anomaly. The geochemistry represents the spatial variation of the content of different elements.

3. A gold mine exploration method as claimed in claim 1, characterized in that: The specific steps of obtaining the occurrence and distribution characteristics of the underground ore body include: Trench exploration is used to carry out trench construction at the location of anomalies to expose the surface cover layer in order to identify the occurrence and distribution characteristics of underground ore bodies; When the occurrence and distribution characteristics of the underground ore body are not determined by trench construction, geophysical prospecting methods are used to accurately measure the underground ore body to determine its occurrence and distribution characteristics.

4. A gold mine exploration method as claimed in claim 3, characterized in that: The trenching project is used to carry out trenching at the location of the anomaly to expose the surface cover layer, and the specific steps include: When there are no protective plants on the ground where the anomaly is located, the rock and soil produced by digging the exploration trench will be collected using a degradable material collection device, and the collection device will be piled on the slopes on both sides of the exploration trench; Complete the trench construction and backfill the trench using the reverse backfill compaction method; When there are protective plants on the ground at the location of the anomaly, drilling is used instead of trenching.

5. A gold mine exploration method as claimed in claim 3, characterized in that: The method of using geophysical prospecting to accurately measure underground ore bodies specifically includes: Based on the physical property differences, size, burial depth, interference level, geoelectric conditions, traffic conditions and cost of the detection target, geophysical precision profiling analysis of underground ore bodies is carried out.

6. A gold mine exploration method as claimed in claim 1, characterized in that: The specific steps of acquiring the prospecting target area include: Prepare mineral geological maps of the study area based on historical geological data; Find typical ore deposits with mineral deposits, use the mineral geological map as the base map, take the ore-forming geological body, ore-forming structure, ore-forming structural surface and ore-forming characteristic signs as multiple ore-forming conditions, and use graphic drawing software to compile the ore-forming element map of typical ore deposits; Using the metallogenic element map as the base map, and combining various geological exploration methods used in prospecting, a comprehensive information map of prospecting prediction for typical mineral deposits is compiled using graphic drawing software; a geological metallogenic prediction model for typical mineral deposits is constructed based on a plurality of the mineralization conditions, and a prospecting prediction model for typical mineral deposits is constructed in combination with a plurality of the geological exploration methods; Obtain the geological elements related to mineralization in the study area, and compile a regional mineralization element map based on the geological elements; use the regional mineralization element map as the base map, and combine the mineral prediction method type and mineralization law to compile a regional mineral prediction element map; construct a regional mineralization model based on multiple geological elements, and construct a regional prospecting prediction model based on the mineral prediction method type and mineralization law; In the area where it is necessary to predict whether minerals exist, prediction factor variables are constructed based on spatial information processing technology GIS and mineral quantitative prediction methods, and the comprehensive information map of prospecting prediction of typical mineral deposits and the regional mineral prediction factor map are superimposed. The prospecting prediction model of typical mineral deposits and the regional prospecting prediction model are used to circle the minimum prediction area and select the prospecting target area.

7. A gold mine exploration method as claimed in claim 1, characterized in that: After the drilling project is completed, it is necessary to carry out well logging work such as natural potential, compensated acoustic wave, three-lateral resistivity, apparent resistivity, well fluid resistivity, magnetic susceptibility, polarizability, well diameter, well inclination and well temperature to analyze the geological conditions.

8. A gold mine exploration system, characterized in that: include: Target area acquisition module, used to acquire prospecting target areas; Anomaly recognition module, used to identify the location of soil chemical element anomalies in the prospecting target area to determine the location of the anomalies; The ore body exposure module is used to obtain the occurrence and distribution characteristics of underground ore bodies at the location of anomalies; The ore body identification module is used to explore gold mines at abnormal locations through drilling projects based on the occurrence and distribution characteristics of underground ore bodies; wherein the drilling projects include: using modular or crawler self-propelled construction equipment and utilizing directional drilling technology for construction; laying anti-seepage materials on the ground in the construction area to prevent oil leakage from the construction equipment; using recovery devices to recover waste liquid and waste; and using exhaust gas purification devices to treat exhaust gas from construction equipment, and using noise reduction equipment to treat construction noise.

Images