A Tunnel Gravity Method for Judging the Deep Extension of High Density Vertical Orebody

A high-density, ore body technology, applied in the direction of measuring gravitational field, instruments, measuring devices, etc., can solve problems such as difficulty in obtaining accurate and high-precision three-way gradient values, inability to judge the deep extension of ore bodies, and small three-way gradient values , to achieve the effect of shortening the prospecting cycle, reducing the cost of prospecting, and having little impact

Active Publication Date: 2022-05-24
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

However, in the patent, four parameters are used for the positioning detection of the ore body. Due to the small space of the tunnel and the small gradient values ​​in the three directions, it is generally difficult to obtain accurate and high-precision gradient values ​​in the three directions, and it is not possible to Determining the deep extension of the ore body

Method used

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  • A Tunnel Gravity Method for Judging the Deep Extension of High Density Vertical Orebody
  • A Tunnel Gravity Method for Judging the Deep Extension of High Density Vertical Orebody
  • A Tunnel Gravity Method for Judging the Deep Extension of High Density Vertical Orebody

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Embodiment 1

[0049] Embodiment 1: this method carries out gravity detection in the deep tunnel of a certain lead-zinc mining area in Pingbao area, Hunan, and has achieved good prospecting effect, as follows:

[0050] This deposit is a typical representative of magmatic hydrothermal lead-zinc deposits in southern Hunan, and its formation is closely related to the emplacement of early Yanshanian granodiorite porphyry. The deposit is mainly controlled by ore-forming plutons and fault-fold structures. The main ore body is in the shape of a large vein, and mainly occurs in the marbleized limestone of the Shidengzi Formation. Other surrounding rocks include the sand shale of the Qishui Formation and the dolomite of the Zimenqiao Formation. The grade of lead-zinc ore is higher (3.05-3.90g / cm 3 ). The main ore minerals are sphalerite, galena, pyrite, pyrrhotite, and gangue minerals are quartz, calcite, etc. The deposit has experienced decades of development and utilization, and the deep resourc...

Embodiment 2

[0076] Embodiment 2: this method carries out tunnel gravity detection in the deep part of a certain copper deposit in central Yunnan, and has achieved good prospecting effect, as follows:

[0077] (1) The system collects, measures and counts the average density of rocks and ores in the survey area

[0078] A total of 35 rock and ore samples were collected in the survey area, including 15 chalcopyrite-bornite ores, 20 rocks (surrounding rocks) (10 massive dolomite, 5 dolomite slate, and volcanic breccia). 5. The density measurement results of ore specimens are shown in Table 5; the average density of chalcopyrite-bornite ore in the survey area is 4.09g / cm 3 , the average density of surrounding rock is 2.59g / cm 3 , the average density of the ore is 1.5g / cm higher than that of the surrounding rock 3 , that is, the copper ore in the survey area is a high-density vein ore body, which has the premise of density difference for the application of this method;

[0079] Table 5 Ore d...

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Abstract

The invention discloses a tunnel gravity method for judging the deep extension of a high-density upright plate-shaped ore body. Firstly, the Bouguer gravity anomaly is obtained through field tunnel gravity observation and various corrections of observation data. Second, through the field separation of the Bouguer gravity anomaly, the remaining gravity anomaly is obtained. Judging whether the ore body is a vertical ore body according to the symmetry of the residual gravity anomaly of the tunnel, and then judging the deep extension characteristics of the high-density vertical ore body according to the positive or negative of the residual gravity anomaly of the tunnel. This method solves the problem of how to quickly judge the deep extension of high-density ore bodies when single or multiple tunnels see the ore body. It not only provides an important basis for the layout of deep prospecting projects, but also proposes a new method for judging the prospect of deep ore body resources.

Description

technical field [0001] The invention relates to a tunnel gravity method for judging the deep extension of a high-density vertical plate ore body, and belongs to the field of mineral resource exploration. Background technique [0002] In the process of ore deposit exploration, when ore bodies are discovered through tunnel exploration, people are usually very concerned about how much the discovered ore bodies extend to the depths. To know the deep extension of the ore body, the most direct method is to construct tunnels or drill holes to control the ore body. However, before designing deep prospecting tunnels or drilling holes, it is necessary to predict the deep extension of the ore body. Therefore, geophysical surveys are generally carried out before design. Geophysical methods include gravity exploration, magnetic exploration, electrical exploration, seismic exploration, radioactive exploration, and geothermal exploration. Electric exploration is also difficult to play d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V7/00
CPCG01V7/00
Inventor 李文尧王季雨韩润生胡涛涛程瑞红
Owner KUNMING UNIV OF SCI & TECH
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