Uranium ore logging instrument fusing natural gamma energy spectrum and neutron time spectrum, and uranium quantitative equation

Abstract

The invention discloses a uranium ore logging instrument fusing a natural gamma energy spectrum and a neutron time spectrum, and a uranium quantitative equation, and particularly relates to a basic structure of the uranium ore logging instrument which can measure the natural gamma energy spectrum formed by natural radioactive elements in a rock stratum and an ore deposit and the instantaneous neutron time spectrum caused by pulse neutron uranium fission point by point along drilled holes, and the quantitative equation for determining the contents of the natural radioactive elements such as uranium, thorium, radium and potassium in the rock stratum and the ore deposit through the two types of logging data. The uranium ore logging instrument fusing the natural gamma energy spectrum and the neutron time spectrum, and the uranium quantitative equation are organic combination and data fusion of two nuclear logging methods, especially, aiming at the natural gamma logging method for uranium ore quantification, the uranium ore logging instrument fusing the natural gamma energy spectrum and the neutron time spectrum, and the uranium quantitative equation have the effects that radioactive balance correction without uranium, radium and radon is achieved and thus core sampling and chemical analysis are not needed, and then have the advantages that the drilling efficiency is improved, the exploration cost is lowered, and the uranium quantification cycle is shortened, and uranium ore quantitative analysis in a drilling site can further be achieved through computer programming.

Description

technical field [0001] The invention relates to a uranium well logging method for uranium exploration and mining, which can measure the natural gamma energy spectrum formed by natural radioactive elements in the rock ore layer and the prompt neutron time spectrum caused by pulse neutron uranium fission point by point along the borehole The basic structure of the instrument; and the quantitative equation for determining the content of natural radioactive elements such as uranium, thorium, radium, and potassium in the rock ore layer by using the logging data of the logging instrument. Background technique [0002] Quantification of solid minerals mainly depends on the chemical analysis method of drilling core sampling, which is also the most direct method for quantification of rock ore layer elements. However, most radioactive minerals are rare and precious metals, especially uranium mines are generally thin in thickness and low in content. For example, the thickness of sandst...

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Problems solved by technology

However, the detection efficiency of prompt neutrons from uranium fission is very l

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