二道河铁矿地下开采顶板下沉和地表沉降监测控制标准探讨

摘要

地下开采破坏了采场上覆岩层的应力平衡状态,引起岩层移动和地表沉降,影响到地表建筑物的安全使用与保护.针对二道河地表工程设施,从地层围岩稳定、经验公式和相关规范的角度探讨地表沉降和顶板下沉控制标准.通过计算分析得知:二道河地下开采过程中对地表建筑物及管线的沉降控制标准确定为12 cm；采场顶板下沉的控制标准确定为17 cm.给出了在目前工程条件下地表沉降和顶板下沉控制值,这对指导地下采矿工程的施工有十分重要的意义.%Underground mining destroys the tress balance state of stope overburden rock, which causes the rock layer movement and the ground settlement and influent the safety of surface buildings. Focused on surface engineering facilities of Erdaohe, from the view of stability of surrounding rock, experience formula and related specifications, the standard of ground settlement and roof sinking is studied. The results show that during underground mining, control standard of ground settlement is determined as 12 cm; control standard of roof sinking is determined as 17 cm. The method and controlling value for defining ground settlement and roof sinking guideposts are proposed, which is of important guidance significance of underground mining construction.