sill

The study on temperature field of coal mine is useful in many aspects Unstable temperature field is researched by finite difference method in this paper,including the establishment of difference equation and the device of program And also,an example about sill is given to illustrate the researc

本文采用有限差分法对不稳定地温场进行了研究,根据数学模型建立起差分方程,编制了计算程序,并通过一个实例分析了岩床侵入煤系地层时的温度变化规律。

The studied diabase sills are found in Xuzhou Suzhou area of the southeastern part of North China Plate.

同位素测年数据显示 ,徐宿地区的辉绿岩床是震旦纪早期和震旦纪晚期两次侵入的产物。