煤炭企业发展是一个动态的概念 ,呈现周期性。深刻揭示企业发展的周期性规律 ,判断企业发展所处的阶段 ,不仅是企业发展理论研究的重要基础 ,也是煤炭企业制定发展战略与策略的需要。对煤炭企业发展周期性规律的研究 ,首先必须从煤炭企业的特点出发 ,这是因为若仅从一般企业发 The development of coal enterprises is a dynamic concept, showing cyclicality. Deeply revealing the cyclical law of enterprise development and judging the stage where the enterprise is developing are not only the important basis for the study of the theory of enterprise development but also the need for the coal enterprises to formulate development strategies and strategies. The study of the cyclical law of the development of coal enterprises, we must first start from the characteristics of coal enterprises, which is because if only from the general business