【摘要】 介绍了磷块岩的物理力学性质,结合地下开采的工程实例,分析了磷块岩在地压作用下开裂破坏规律.研究表明,磷块岩中的微节理裂隙面的存在,是导致磷块岩在地应力作用下宏观裂纹产生扩展的重要因素.并提出了维护地下开采安全稳定性的措施.更多还原

【Abstract】 The physical and mechanical properties of the phosphorite are introduced in this paper.The destruction mechanism of phosphorite is studied in the underground mining.The result shows that the main reason of causing macro-crack propagation is the micro-crack in phosphorite.The measures of keeping the underground mine safety are given.更多还原