三山岛金矿采场顶板倒三角构造研究及应用

Study on the inverted triangle structure of stope roof and its application in Sanshandao Gold Mine

三山岛金矿为一中低温热液破碎带蚀变岩型金矿床,节理裂隙发育,矿体赋存于海平面以下,水文地质条件复杂。实际生产过程中,采场中揭露出许多不同产状的节理,构造"倒三角"节理。经过反复爆破震动或空顶时间过长时,往往会造成冒顶现象,且极易形成大规模塌方。通过加强地质素描、合理支护、采矿方法优化、作业循环优化、加强现场管理等,问题得到了解决,有效地保障了安全生产。

Sanshandao gold deposit is a mesothermal-epithermal altered gold deposit with broken ground, and it has developed joint fissure. The deposit is under the sea level and its hydrogeologic conditions are complex. During production process, lots of joints with different occurrence appeared such as inverted triangle joint. These joints will lead the roof fall and easily cause large scale collapse after repeating blasting vibration and long time no roof support. Through strengthening geological sketch, reasonable support, optimizing mining method and operation cycle and strengthening site management, the problems were solved and it guaranteed the safety production.