支架顶梁对γ射线方法测量顶煤厚度影响研究

Influence of Canopy of Hydraulic Support upon Measurting Thickness of Coal Seam by Natural Gamma Ray

建立了自然 γ射线穿透顶煤层和液压支架顶梁后辐射强度的数学模型 .在这模型中考虑到了γ射线穿过煤层后辐射强度与顶煤层厚度之间的函数关系 .得出了在考虑支架顶梁与不考虑支架顶梁两种情况下的 γ射线强度相差 1 3.6%的结论 .

A mathematical model for calculating the radiation intensity of natural gamma ray penetrating through the coal seam and the canopy of hydraulic support was set up. In this model the function relationship between the coal seam and the radiation intensity of gamma ray passing through the coal seam was considered. The influence of the canopy of hydraulic support upon the measuring results of the thickness of coal seam was also analyzed. It comes to the conclusion that the difference of the radiation intensity of gamma ray between with and without considering the canopy of hydraulic support is 13.6%. The mathematical model was verified by the experimental results of measuring the thickness of coal seam in Tangshan Coal Mine.