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自1974年起我们开展了测井解释灰分的工作。经过几年来的反复实验和计算,取得了一定的效果。一、理论基础 1.天然伽玛曲线煤的主要成分是碳和碳的同位素C~(11)、C~(12)、C~(13)、C~(14)等。它们都不放射伽玛射线,有的只放射β射线,但β射线不是我们的探测对象。因此可以认为纯煤基本上不放射伽玛射线。煤层中的灰成分主要有SiO_2、Al_2O_3、Fe_2O_3、CaO、S_2O_3、MgO等。其中前四种约占90％以上。由放射性同位素表可知,Si、Al、Fe、Ca、O、S、Mg、N等元素基本不存在放射性同位素,或有的只能放射较低的β射线,而不放射伽玛射线,也就是说纯煤及煤
Since 1974, we have carried out logging interpretation of ash content. After several years of repeated experiments and calculations, and achieved some results. First, the theoretical basis 1. The natural gamma curve coal is the main component of carbon and carbon isotopes C ~ (11), C ~ (12), C ~ (13), C ~ (14) and so on. They do not emit gamma rays, while others emit only beta rays, but beta radiation is not our detection target. Therefore, it can be considered that pure coal basically does not emit gamma ray. The main ash in the coal seam is SiO_2, Al_2O_3, Fe_2O_3, CaO, S_2O_3, MgO and so on. The first four of them account for more than 90%. From the radioactive isotope table shows, Si, Al, Fe, Ca, O, S, Mg, N and other elements basically do not exist radioactive isotopes, or some can only emit low beta rays, but not gamma rays, that is Said pure coal and coal