甘肃省文县阳山金矿区复杂地层钻探技术研究

发布时间：2018-11-12 07:15

【摘要】：甘肃省文县阳山矿区是武警黄金部队的重点金矿区,其勘探任务由武警黄金第十二支队承担。矿区处于川北陇南交界地,在岷山山脉北段与秦岭山脉西端,位于陕、甘、川三省交界,1997年被武警黄金部队发现,累计探获黄金资源量308吨,是亚洲最大类卡林型金矿。近年来随着施工面积的扩展,该区钻探施工遇到的复杂地层难题越来越多,漏失问题越来越严重,而岩心钻探是在进行固体矿产地质勘探时、尤其是确定深部矿产资源所必须采用的勘探手段之一。矿区岩心钻探仍然是目前和今后相当长一段时间内矿区地质工作者在进行地质工程勘探时,获取直观地质资料的最主要方式,因此研究阳山矿区钻探施工技术,解决施工难题,对控制施工成本、提高施工效率,用科学手段更好的为地质找矿服务有重要意义,同时对巩固阳山金矿走向世界也有着非常重要的意义。在行业钻探设备型号性能相对稳定、人员操作技术在较长一段时间内没有较大变化外,研究将选择范围更广的多种管材工艺相互组合、再配合较为灵活的护壁堵漏技术,对在该区域顺利开展钻探施工就有了决定性意义。本文将矿区作为研究区,在充分收集区内自然地理及地质环境等资料的基础上,结合该区地质环境条件、地质岩心钻探特点,对区内复杂地层的种类、特征和复杂地层对地质岩心钻探施工的影响因素进行了深入分析研究,提出了在复杂地层中进行钻探施工的主要措施办法。主要研究成果如下:1.全面介绍了文县阳山金矿地质特征、岩石的物理性质及可钻性,分析了矿区复杂地层对钻探施工的影响。2.全面分析了文县阳山金矿钻探技术指标,总结出文县金矿钻探存在第四系覆盖层钻进难、钻孔漏失治理难、钙/碳泥质千枚岩破碎层施工难、套管护壁深度增加难、钻孔轨迹控制难五个技术难题。3.针对文县金矿的钻探技术难题,通过优化钻孔结构、采用牙轮钻头和复合片全面钻进工艺、大口径绳索钻进技术、金刚石底喷式钻头技术、定向钻进的综合钻探技术,较好地解决了文县金矿的钻探技术难题。
[Abstract]:Yangshan mining area of Wenxian County, Gansu Province is the key gold mine area of the gold army of the armed police, and its exploration task is undertaken by the 12th gold detachment of the armed police. The mining area is located at the border of Longnan, North Sichuan, the western end of Minshan Mountains and Qinling Mountains, located at the junction of Shaanxi, Gansu and Sichuan provinces. In 1997, it was discovered by the gold troops of the Armed Police Force and the accumulative amount of gold resources was 308 tons, which is the largest type of Carlin gold deposit in Asia. In recent years, with the expansion of construction area, there are more and more complicated formation problems and more leakage problems encountered in drilling construction in this area, while core drilling is in the process of geological exploration of solid minerals. In particular, it is one of the exploration methods that must be used to determine the deep mineral resources. Core drilling in mining area is still the most important way for geologists to obtain intuitionistic geological data during geological engineering exploration at present and for quite a long time in the future. Therefore, the drilling construction technology in Yangshan mining area is studied to solve the construction problems. It is of great significance to control construction cost, improve construction efficiency and provide better service for geological prospecting by scientific means, and it is also of great significance to consolidate Yangshan Gold Mine towards the world. The model performance of drilling equipment in the industry is relatively stable, and the personnel operation technology has not changed much in a long period of time. Besides, the research will select a wide range of pipe materials to combine with each other, and then cooperate with the more flexible wall protection leakage plugging technology. It is of decisive significance to carry out the drilling construction successfully in this area. In this paper, taking the mining area as the study area, on the basis of fully collecting the data of the natural geography and geological environment in the area, combining the geological environment conditions and the characteristics of geological core drilling, the types of complex strata in the area are analyzed. The influence factors of geological core drilling construction are deeply analyzed and studied by the characteristics and complex formations, and the main measures for drilling in complex strata are put forward. The main research results are as follows: 1. This paper introduces the geological characteristics, physical properties and drillability of the Yangshan gold deposit in Wenxian County, and analyzes the influence of the complex strata in the mining area on the drilling construction. The technical indexes of drilling in Yangshan Gold Mine of Wenxian County are analyzed in an all-round way. It is concluded that the drilling in Wenxian Gold Mine is difficult to drill in Quaternary overburden layer, difficult to control hole leakage, difficult to construct broken layer of calcium / carbon muddy phyllite, and difficult to increase the depth of casing wall protection. Borehole trajectory control difficult five technical problems. 3. In view of the technical problems of drilling in Wenxian Gold Mine, by optimizing the drilling structure, adopting the comprehensive drilling technology of cone bit and composite piece, large caliber rope drilling technology, diamond bottom jet drill technology, and directional drilling technology, the drilling technology is introduced. The problem of drilling technology in Wenxian Gold Mine has been solved well.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.51;P634

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