| 章爱卫,杨彤飞.河谷碳酸盐岩型铅锌矿深部矿坑涌水主控因素研究[J].矿产勘查,2023,14(7):1259-1269 |
| 河谷碳酸盐岩型铅锌矿深部矿坑涌水主控因素研究 |
| Study on main controlling factors of deep pit water inflow in carbonate rock lead-zinc deposit in River Valley |
| 投稿时间：2023-04-26 修订日期：2023-05-18 |
| DOI：10.20008/j.kckc.202307026 |
| 中文关键词: 岩溶地下水 裂隙充水矿床 水源与通道 矿坑涌水 帷幕注浆 |
| 英文关键词: karst groundwater fissure water filling deposit water source and channel pit water discharge curtain grouting |
| 基金项目:本文受“毛坪深部高承压矿山水文地质探查、综合防治与监测预警项目”（2020-081）资助。 |
|
| 摘要点击次数: 683 |
| 全文下载次数: 470 |
| 中文摘要: |
| 西南金属矿区含水层空间结构复杂，多属水文地质条件复杂的河谷岩溶裂隙充水矿床，深部开采极易诱发岩溶涌突水问题，查明矿坑涌水主控因素是解决水患问题的关键。本文以位于云南某河谷的碳酸盐岩铅锌矿为例，基于水文地质勘察、钻孔水位监测、放水试验、涌水量动态观测，查明矿区岩溶发育强度及地下水流场特征，分析矿坑深部充水水源及通道，讨论帷幕注浆工程对矿坑涌水的影响。结果表明：矿坑涌水主控因素为北东—南西构造裂隙，以大气降雨入渗补给为主，地表河流因地下水位下降呈悬挂式河流，缓慢渗流补给地下水且不存在灌入式通道；受近南北向、北东向、北西向3组构造影响，空间上构成“Y”型充水通道，西北、北东、南北向导水能力强，以二叠系栖霞茅口组灰岩地下水侧向补给为主且水源充足；南侧导水性较差，上泥盆统宰格组地下水缓慢径流补给且水量小；帷幕注浆工程大幅减少矿坑涌水量，封堵效果显著。 |
| 英文摘要: |
| Karst fissure water-filled deposits in southwest China with complex hydrogeological conditions could easily induce to pit water discharge disasters during deep excavation. Identifying the main controlling factors for water inrush in mining pits is the key to solving the problem of water disasters. The research was conducted by taking a case of deep karst fissure water filling mine located in the east of Luoze River （+887 m） of Yunnan Province as an example， based on hydrogeological investigation， drilling water level monitoring， water release tests， and dynamic observation of water inrushes， the intensity of karst development and characteristics of the underground water flow field in the mining area were determined. The source and pathway of deep water filling in the mine pit were analysed， and the impact of grouting curtain engineering on water inrush in the mine pit was discussed. The results show that the main controlling factor of the mine inrush is the northeast-southwest structural fracture， mainly replenished by atmospheric rainfall infiltration， and the surface river runs as a suspended river due to the declining groundwater level. There is no groundwater channel with an infiltration type. Influenced by three sets of structures， north-south， northeast-southwest， and northwest-southeast， a Y-shaped water-inflow channel is formed spatially， and has strong water-guiding ability in the northwest， northeast， and north-south directions. The northwest and north-south water conduits have a strong transfer capacity， mainly supplemented by the lateral groundwater recharge of limestone of Permian Qixia and Maokou Formation， and the water source is sufficient. The southern conduit has poor transfer capacity， and is only slowly recharged by Late Devonian Zhaige Formation groundwater， with a small water volume. Grouting curtain engineering significantly reduces the amount of water inrush in the mine pit， producing a remarkable sealing effect. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |