While-drilling natural gamma uranium measuring instrument based on rock core drilling

Abstract

The invention relates to equipment capable of detecting a uranium ore in real time in a coring drilling process. A while-drilling gamma uranium measuring instrument based on rock core drilling is characterized by comprising an outer pipe, an inner pipe, a battery component, a fastening pressure spring and a sensor, wherein the outer pipe is a non-magnetic drill rod; the inner pipe is positioned in the outer pipe, and comprises a power supply switch fixing piece, a battery bin compression-resisting cylinder, a first compression-resisting cylinder connecting head, a circuit board bin compression-resisting cylinder, a second compression-resisting cylinder connecting head, a sensor bin compression-resisting cylinder and a plug screw; the battery component supplies power to a signal processing circuit and the sensor; the sensor is positioned in the sensor bin compression-resisting cylinder, and is connected with a sensor signal input end of the signal processing circuit; the signal processing circuit comprises a single-chip microcomputer; and the single-chip microcomputer is connected with a storer through an interface circuit. The instrument can perform the uranium ore exploration for a stratum difficult to obtain a rock core, through measuring natural gamma strength of the stratum, and measures the natural gamma strength while drilling in the coring drilling process to judge if the drilled stratum is the uranium ore.

Description

technical field [0001] The invention belongs to a measuring-while-drilling instrument for uranium resource exploration, in particular to a device capable of real-time detection of uranium during coring drilling. Background technique [0002] Uranium is a rare radioactive metal element. Natural uranium is the raw material for the production of nuclear weapons and the basic raw material for nuclear submarines and nuclear power plants. Uranium resources are not only an important strategic resource, but also an important energy source. The exploration of uranium ore requires various methods such as physical exploration and chemical exploration. Core drilling is the ultimate method to determine the grade and production of uranium ore. In some mining areas, the formations are loose, fractured and prone to collapse, chipping, or borehole shrinkage. The rate of drilling cores is very low or even no cores can be taken at all, so it is impossible to accurately judge whether the dri...

AI Technical Summary

Problems solved by technology

The drilling core collection rate is very low or even impossible to take cores, so it is impossible to accurately judge whether the drilled strata are uranium deposits

When drilling deep uranium mines in some areas, the lower part of the strata is broken and the core cannot be taken out. It is proposed that the lower part of the drill tool collapses or shrinks and cannot continue to drill down. The problem that the thousand-meter-deep hole is almost scrapped often occurs

In addition, due to the limitation of environmental protection on the surface, it is difficult to reopen new holes, which brings great difficulties to the drilling work

[0003] Although there are examples of gamma-ray intensity measurement while drilling in China, the purpose is to divide lithology and formation correlation, calculate formation shale content and calculate median particle size, but it cannot be used in core drilling of uranium ore

In addition, when conducting uranium ore drilling measurements, there is also a method of using natural gamma ray intensity to judge whether the drilled formation is uranium ore. The borehole must be stable so that the measuring instrument can be lowered into the wellbore smoothly, and it cannot be used in loose, broken and easily collapsed formations

The existing coring drilling technology is not effective in the exploration of uranium deposits in some loose and broken formations, and the coring rate is low or even no core can be taken out; this makes it impossible to conduct correlation analysis through the core to determine whether the drilled formation is for uranium ore

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