南芬铁矿2号排土场稳定性分析及治理措施

Stability Analysis and Treatment Measures of No.2 Dumping Site in Nanfen Iron Mine

运用极限平衡法就本钢南芬铁矿2号排土场现状进行了稳定性分析,并对排土场前推200 m和分台阶排土的情况进行了预测分析,得出如下结论:排土场目前处于稳定状态,雨季或融雪季节,当排土场内地下水来不及及时排出时,排土场的稳定性将大幅度降低,有很大的安全隐患;改用分台阶排土方式对稳定性没有明显改善,意义不大;建议做好排土场安全监测、排水及支挡工作。

The stability analysis of No. 2 dumping site in Nanfen Iron Mine is made using limit equilibrium method. The stability of the dumping site after 200 m advance using the present single bench dumping is analyzed, and the effect of the sub - benching dumping mode on the stability of the dumping site is analyzed also. Some conclusions are drawn： at present the dumping site is steady, but when in rainy or snow melting season, the stability of the dumping site will be greatly reduced if the underground water in the dump cannot be drained timely, representing a great hidden safety danger; the change of the dumping mode to sub - benching will have no evident improvement on its stability. It is suggested that the safety monitoring, drainage and baffling of the dump should be well done.