杨家湾崩落转充填法隔离层安全厚度研究

Study on Safety Thickness of Isolation Layer for Transfer from Caving to Stoping-and-filling in Yangjiawan Mine

杨家湾铁锌矿开采技术条件复杂，矿区西侧有公路和河流，崩落法开采已经造成地表形成三处塌陷。为了控制地表沉陷以及保证下部资源安全回收，对崩落转充填法开采的关键部位进行了隔离层安全厚度研究。通过数值模拟和理论计算相结合，最终确定隔离层的安全厚度为10～12m，该厚度的隔离层可以为矿山下部矿体安全开采提供保障，对指导矿山的工程实践具有重要意义。

The mining conditions in Yangjiawan Iron-zinc mine is complicated, there are highway and river in the west of mine, and the underground caving has resulted in three surface collapses. In order to control surface subsidence and ensure the safety recovery of resources in the lower part of mine. a study on the safety thickness of isolation layer in the key parts for The transfer from caving to stoping-and-filling was carried out. By a combination of numerical simulation and theoretical calculation, the appropriate safety thickness of isolation layer was determined as 10 - 12 m which can provide a safety protection for the further mining in the low- er part of the ore-body. The study is of great significance to engineering practice in the mine.