【作者】 伍佑伦； 廖国燕； 古德生； 王永清；

【Author】 Wu Youlun ,Liao Guoyan ,Gu Desheng Wang Yongqin ( School of Resources and Safety Engineering, Central South University. Changsha, Hunan 410083 ,China; Chen Chao Iron Mine, Wugang Mining Co. Ltd. Ezhou, Hubei 437605,China)

【机构】 中南大学资源与安全工程学院； 武钢矿业公司程潮铁矿；

【摘要】 结合程潮铁矿的工程地质条件以及顶板围岩崩落过程与地面变形的监测结果,认为在金属矿床复杂顶板中存在控制顶板崩落过程的关键结构体。由于关键结构体的存在, 顶板的崩落呈间隔性与跳跃性向上发展,在崩落发展到地表之前,地表的变形量较小且没有规律性。在此基础上,探讨了关键结构体的理论框架,讨论了关键结构体的概念与存在条件、力学特性、空间形态、破断方式及其对应力场的影响。更多还原

【Abstract】 Integrating the engineering geological condition and monitoring results of caving process of overlying strata and deformation of ground surface, it is granted that there exist key structural blocks which control the caving process in the overlying strata of ore bodies. Because of the existence of key structural blocks, the overlying strata collapse intermittently and abruptly, and the surface deform slowly and complexly. Based on that, the theory structure of key structural blocks is discussed. The conception of key structural blocks, their prerequisites of presence, mechanical characteristics, spacial structure modes, failure modes, effect on stress are discussed also.更多还原