Coal bed joints are a widespread structure in coal beds. They are important objective in study of shaft structure and also a very important engineering geological factor.
煤层节理在煤层中普遍发育，它不仅是矿井构造研究的重要内容，同时也是极其重要的工程地质因素。
Describes the structure, working principle and operating method of a joints traction bed controlled by micro-processor.
介绍微电脑多关节牵引床的结构、工作原理和操作方法。
To counter the effects of joints on the production of coal mine, the paper advances a new method to forecast the frequency of joints in coal bed and its roof.
针对节理对煤矿生产的影响。本文提出一种预测煤层及其顶板节理频率的新方法。
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