厚大矿体充填条带开采岩层损伤与地表沉降联合监测研究  

作　　者：朱宗俊 杨友才 刘建 秦晋 李干 

机构地区：[1]湖北杉树垭矿业有限公司,湖北宜昌443100 [2]宁波大学岩石力学研究所,浙江宁波315211

出　　处：《科技创新与应用》2025年第5期112-116,共5页Technology Innovation and Application

基　　金：浙江省自然科学基金(LQ24D020001)。

摘　　要：厚大矿体资源的开采面临施工难、采动地压大的难题,而采用以厢式充填法为主的分层条带充填开采在杉树垭磷矿实现顺利应用。为研究厚大矿体充填条带开采岩层损伤与地表沉降,采用地质雷达的方法,监测得到厚大磷矿层分层条带充填开采产生的顶板损伤深度在8.5 m左右,采动影响范围较低,厢式充填采矿法在厚大矿体开采中应用效果较好。厚大矿体的矿柱在5~10 m范围内存在明显的岩层裂隙,而充填体的裂隙节理主要分布在17 m范围内,超过17 m深度的充填体裂隙数目明显降低,表现出完整性的提升。通过DS-InSAR地表位移监测方法,研究得到2019—2023年,401段和402段的地表沉陷最大值为47 mm,且总体上变化不均匀而出现明显波动性,表明厚大矿体开采并未对地表沉陷造成明显影响。The mining of thick and large ore body resources faces difficulties in construction and high mining ground pressure.However,layered strip filling mining based on box filling method has been successfully applied in Shanshuya Phosphate Mine.In order to study the rock formation damage and surface subsidence in thick and large ore bodies filled strip mining,the geological radar method was used to monitor and determine that the depth of roof damage caused by layered strip filling mining in thick and large phosphorus ore layers was about 8.5 m,and the mining influence range was relatively low.The box-filling mining method has a good application effect in the mining of thick and large ore bodies.There are obvious rock fractures in the range of 5 to 10 m in the pillars of thick and large ore bodies,while the crack joints of the filling body are mainly distributed in the range of 17 m.The number of cracks in the filling body beyond 17 m is significantly reduced,showing an improvement in integrity.Through the DS-InSAR ground displacement monitoring method,it is found that from 2019 to 2023,the maximum value of surface subsidence in sections 401 and 402 is 47 mm,and the overall change is uneven and there is obvious fluctuation,indicating that the mining of thick and large ore bodies has not significantly affected surface subsidence.

关 键 词：磷矿 地质雷达 采动应力 DS-InSAR 地表位移 

分 类 号：TD326[矿业工程—矿井建设]