采空区地压引发的围岩大面积冒落、岩层移动及地表塌陷问题严重危及着大多数矿山的安全生产,致使原始的采矿环境急剧恶化、矿产资源浪费严重. 通过现场调查发现,由于历史的原因,海沟金矿浅部中段存有较大范围的大规模采空区群,且多数采场间柱、顶底柱现阶段均已发生变形破坏,部分采空区之间在水平方向、垂直方向均有相互贯通,对矿山的生产运行形成了极大的威胁. 通过对重点区域内采空区稳定性与危害程度进行分析,结合矿山长远发展、区分轻重缓急,提出并制定了采空区关键单体的治理方案,采用FLAC3D数值分析软件对治理方案的岩体力学行为特征进行模拟计算,验证分析其实施方案的有效性和科学性,为采空区治理工作提供必要的技术支撑.
The large area surrounding rock falling,rock strata movement and surface subsidence caused by mined-out area pressure seriously endanger the safety of most mines,resulting in a sharp deterioration of the original mining environment and serious waste of mineral resources. Through field investigation,it was found that large groups of large-scale goafs exist in shallow stages of Haigou Gold Mine due to historical reasons,and the deformation and failure have occurred in most of stope pillars,mutual transfixion between some goafs occur in the horizontal direction and the verti-cal direction,which are great threat to production operation of the mine. The stability and perniciousness of goafs in the key areas were analyzed,and based on the long-term development of mine and the priorities,the paper put forward and designed treatment scheme of key monomer goafs. FLAC3D numerical simulation software was used in the calculation of rock mass mechanics,and the scientific feasibility and effectiveness of the scheme were verified,providing necessary technical support for goaf treatment.
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