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Method for locating and detecting deep high-density inclined ore body in full spatial domain based on tunnel gravity

A full-space, high-density technology, applied in measurement devices, gravitational field measurement, geophysical measurement, etc., can solve problems such as difficult positioning, difficult to accurately locate and detect deep ore bodies, and electromagnetic interference.

Inactive Publication Date: 2018-03-16
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the deep high-density inclined ore body is difficult to locate in the whole space domain and other geophysical methods are affected by electromagnetic interference and abnormal ambiguity, which makes it difficult to accurately locate and detect the deep ore body, and provides a high-precision tunnel gravity A method for detecting high-density inclined orebodies in the whole space domain

Method used

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  • Method for locating and detecting deep high-density inclined ore body in full spatial domain based on tunnel gravity
  • Method for locating and detecting deep high-density inclined ore body in full spatial domain based on tunnel gravity
  • Method for locating and detecting deep high-density inclined ore body in full spatial domain based on tunnel gravity

Examples

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Effect test

Embodiment 1

[0131] Example 1: The method for positioning and detecting high-density inclined concealed ore bodies in the tunnel gravity full space domain is applied in the tunnel of a lead-zinc mine in northeast Yunnan, and the ore prospecting effect is good. Its specific content is as follows:

[0132] (1) Collect 320 pieces of rock and ore samples, and the results of rock and mineral identification are: 121 pieces of rock dolomite, 199 pieces of lead-zinc ore; the density measurement results show that the average density of ore-hosting dolomite is 2.73×10 3 kg / m 3 , the average density of lead-zinc ore is 3.91×10 3 kg / m 3 , the remaining density of ore is 1.18×10 3 kg / m 3 , with the physical property prerequisites for gravity measurement.

[0133] (2) Tunnel gravity observation

[0134] 1) Measuring point positioning

[0135] The gravity measurement tunnel is QLC1, and only one general base point is arranged in the survey area. Mark the point number on the tunnel wall, point num...

Embodiment 2

[0170] Example 2: This method of tunnel gravity full-space domain positioning and detection of high-density inclined hidden ore bodies was carried out in a known barite deposit tunnel in Northwest Yunnan, and the application effect was good. The specific content is as follows:

[0171] (1) Collect 60 specimens, including 30 dolomite and 30 barite. The density measurement results show that the average density of dolomite is 2.73×10 3 kg / m 3 , the average density of barite is 3.47×10 3 kg / m 3 , the remaining density of ore is 0.74×10 3 kg / m 3 , with the physical property prerequisites for gravity measurement.

[0172] (2) Tunnel gravity observation

[0173] 1) Measuring point positioning

[0174] Gravimetric tunnel for QLC 2 # In the tunnel, there is only one general base point in the survey area, numbered G0, and the coordinates of the base point are positioned using high-precision GPS; the coordinates of the measuring points are measured with theodolite, and the distan...

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Abstract

The invention discloses a method for locating and detecting a deep high-density inclined ore body under in a full spatial domain based on tunnel gravity and belongs to the geophysical prospecting technical field. According to the method of the invention, the deep high-density inclined ore body can be located and predicted through using gravity anomalies and X, Y and Z-direction gravity gradient anomalies. The method mainly comprises tunnel gravity and gravity gradient observation and correction of observation data, wherein the correction of the observation data involves solid tide earth tide correction, zero drift correction, terrain correction, Bouguer correction, latitude correction, tunnel correction, goaf correction, backfill area correction and the like, so that gravity anomaly valuesand X, Y and Z-direction gravity gradient anomaly values can be obtained. With the method adopted, difficulties in locating a high-density inclined ore body in a full spatial domain and difficultiesin accurately locating and detecting of a deep high-density inclined ore body of other geophysical prospecting methods which are subjected to electromagnetic interference and have multiplicity of solutions for abnormalities can be eliminated.

Description

technical field [0001] The invention relates to a high-precision tunnel gravity full-space domain positioning method for detecting deep high-density inclined ore bodies, belonging to the field of mineral resource exploration. Background technique [0002] The deep high-density inclined ore body refers to the inclined ore body whose ore density in the lower part of the ground is significantly higher than that of the ore-hosting rock. With the continuous development and utilization of mineral resources, the surface or shallow deposits have basically been exploited, and the main prospecting direction at present and in the future is deep. The positioning and detection of deep deposits or ore bodies is one of the main problems and research hotspots in the scientific frontier of prospecting and prediction and in the field of mineral exploration. Usually, geophysical methods (such as direct current method, magnetic method, electromagnetic method) are used in half-space domain ( Su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V7/06
CPCG01V7/06
Inventor 韩润生李文尧程瑞红
Owner KUNMING UNIV OF SCI & TECH
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