采空区隐患影响下的残矿协同开采技术研究

采空区时空分布复杂、地压显现严重是制约赣南钨矿残矿资源回收的关键性技术难题。为解决赣南地区钨矿残矿资源回收的难题,基于“协同开采”理念,兼顾资源开采与隐患处理,提出了针对赣南地区 钨矿的采空区探测-微震实时监测-残矿协同回采(探-监-采)的协同开采关键技术方案,并结合赣南某典型钨矿开展了工程案例分析。研究表明：针对31132矿块空区复杂的时空分布特征,以三维精细探测技术为基 础精细化构建了整体地质模型和采空区模型,精确得到残矿形态与残矿量,矿量估算误差小于10%,并以此为基础分别对顶柱、底柱和间柱因地制宜制定了回采方案;残矿回采过程中建立了IMS微震监测系统,对31132 矿块采场的采空区稳定性进行了实时监测和预警,并协同应用空区封闭、胶结充填等方法处理空区,实现了空区隐患处理与残矿资源回收的有机统一,完成了31132采场顶柱残矿全部回收,并为间柱回采创造了条件。 研究结果可为赣南地区钨矿残矿资源安全、高效、协同开采提供技术参考。

Study on Synergetic Mining Technology of Residual Ore under Hidden Influence of Goaf

The complex spatial-temporal distribution of goaf and the serious ground pressure appearance are the key technical problems restricting the recovery of tungsten ore residual resources in Southern Jiangxi Province.In order to solve the problem of recovery of tungsten mine residual resources in Southern Jiangxi Prpvince,based on the concept of "synergetic mining",consideration of resource exploitation and hidden danger treatment,this paper puts forward the key technical scheme of synergetic mining （exploration supervision mining） for the detection of goaf,real-time monitoring of microseism and synergetic mining of residual mine in Southern Jiangxi Province,and the engineering case of a typical tungsten mine in Southern Jiangxi Province is analyzed.The results show that according to the complex spatial-temporal distribution characteristics of 31132 ore block,the whole geological model and goaf model are constructed on the basis of three-dimensional fine detection technology,and the residual ore form and quantity are accurately obtained.The ore estimation error is less than 10%.On this basis,the mining plan is made for the top pillar,the bottom pillar and the inter pillar according to the local conditions.The IMS micro-seismic monitoring system is established in the process of residual mining to monitor and forewarn the stability of the mined out area of 31132 block stope in real time,and to deal with the mined out area in cooperation with the methods of goaf closure and cemented filling,so as to realize the organic unity of the hidden danger treatment of the mined out area and the recovery of residual ore resources,complete the recovery of all the residual ore in the top pillar of 31132 stope,and create conditions for the recovery of the intermediate pillar.The above study results can provide technical reference for safe,efficient and synergetic mining of tungsten residual resources in Southern Jiangxi Province.