It is important to master movement rules of overburden rock layers to control roof rationally in special production and geological conditions.
在工作面特定的生产技术和地质条件下，掌握工作面上覆岩层的运动规律，对合理控制顶板非常重要。
It is important to master movement rules of overburden rock layers to control roof rationally in special production and geological conditions.
在工作面特定的生产技术和地质条件下，掌握工作面上覆岩层的运动规律，对合理控制顶板非常重要。
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