小秦岭金矿田复杂地层深孔找矿钻探技术研究

发布时间：2018-08-28 06:21

【摘要】：本论文研究依托于“小秦岭(陕西)金矿田深部及外围金矿整装勘查区深孔验证项目”,该项目是陕西国土资源厅整装勘查的重点施工项目,其目的主要是对陕西小秦岭地区重点矿脉第二成矿段深部进行揭露,本文研究的小秦岭矿区位于陕西省潼关县太要镇善车峪。2010年陕西省小秦岭金矿区累计查明金储量149.27吨,随着浅部地层金矿的不断开采殆尽,陕西小秦岭金矿田已全面进入深部探矿阶段。钻孔深度不断加深,深部钻探工程任务也与日俱增,深部钻孔的地层情况也越来越复杂,破碎地层出现的漏失、坍塌问题,造斜地层出现的钻孔偏斜问题等等,严重影响钻孔质量与钻进效率。因此对钻探工艺技术带来了新的挑战,也提出了更高的要求。深孔钻探施工中还有很多技术问题亟待解决,并且处理复杂地层钻孔问题的技术也需进一步研究应用。在满足勘探效果的前提下,如何安全、高效地进行深部钻探是小秦岭矿区当前需要解决的重要问题。本文以小秦岭矿区深孔找矿钻探技术为研究对象,充分收集矿区地质资料,分析矿区复杂地层对岩心钻探施工的影响,对矿区深孔岩心钻探出现的烧钻、卡钻、钻孔严重漏失等常见孔内事故进行分析,并对矿区钻探施工技术进行研究,提出了解决复杂地层孔内事故的技术及矿区钻探施工技术方案。主要研究成果如下:(1)详细阐述了陕西小秦岭金矿田地质特征、岩石的物理性质以及岩层可钻性,研究了矿区复杂地层对于钻探施工的影响。(2)针对矿区深孔施工中发生的孔内事故,进行了深入分析并得到了相应的处理方法。对于深孔烧钻事故,钻具遗落等问题,设计并研制了专门打捞及磨铣工具,取得了良好的应用效果;对于深部孔段卡埋钻事故,采用水力内割刀与可退式捞矛配合处理技术,避免了事故隐患,简化了处理过程,缩短了处理周期,节约了处理成本。针对漏失坍塌事故,对深部孔段护壁堵漏水泥浆进行理论分析与试验研究,研制出适合深孔护壁堵漏处理的速凝水泥浆,且应用效果良好,封堵后彻底根治破碎地层漏失坍塌问题,保证了钻孔质量,提高了事故处理效率。(3)针对矿区钻孔的钻探施工情况,通过对钻探设备优选、钻探工艺技术以及孔斜控制技术等研究,提出了适用于小秦岭矿区的深孔钻探施工技术方案,针对矿区钻孔偏斜问题,提出了控制孔内偏斜的技术方法,对矿区后续深孔钻探施工具有重要指导意义。
[Abstract]:This paper is based on "deep hole verification project in deep and peripheral gold exploration areas of Xiaoqinling (Shaanxi) gold ore field", which is the key construction project of Shaanxi Land and Resources Department. The purpose of the study is mainly to expose the deep part of the second ore-forming section of the main vein in Xiaoqinling area, Shaanxi Province. The Xiaolinling mine area studied in this paper is located in Shanchieyu, Taiyao Town, Tongguan County, Shaanxi Province. In 2010, the gold deposit in Xiaoqinling Gold Mine area of Shaanxi Province was found to be 149.27 tons. With the depletion of gold deposits in shallow strata, the Xiaoqinling gold ore field in Shaanxi Province has entered the deep prospecting stage. With the deepening of drilling depth and the increasing tasks of deep drilling engineering, the formation of deep boreholes is becoming more and more complicated, the problems of leakage and collapse of broken strata, the problems of borehole deflection in diagonal strata, and so on. The drilling quality and drilling efficiency are seriously affected. Therefore, it brings new challenges to drilling technology and puts forward higher requirements. There are still many technical problems to be solved in the deep hole drilling construction, and the technology to deal with the drilling problem in complex strata also needs to be further studied and applied. On the premise of satisfying the exploration effect, how to carry out deep drilling safely and efficiently is an important problem that needs to be solved at present in Xiaoqinling mining area. In this paper, the deep hole prospecting drilling technology in Xiaoqinling mining area is taken as the research object, the geological data of the mining area is collected fully, the influence of complex strata in the mining area on the core drilling construction is analyzed, and the burning drilling and jammed drilling appearing in the deep hole core drilling in the mining area are analyzed. The common hole accidents such as serious hole leakage are analyzed, and the drilling construction technology in the mining area is studied, and the technology to solve the hole accident in complex strata and the technical scheme of drilling in the mining area are put forward. The main research results are as follows: (1) the geological characteristics, physical properties and drillability of rock in Xiaoqinling Gold Orefield, Shaanxi Province are described in detail. The influence of complex strata in mining area on drilling construction is studied. (2) aiming at the in-hole accidents in deep hole construction in mining area, the author makes a thorough analysis and obtains the corresponding treatment methods. A special fishing and grinding tool is designed and developed for the problems of deep hole drilling accident, drilling tool drop and so on, and good application results have been obtained, and for the deep hole section burying accident, hydraulic internal cutter and recoverable salvage spear are used to deal with the accident, It avoids the hidden trouble of the accident, simplifies the process, shortens the treatment period and saves the processing cost. In view of the leakage and collapse accident, the theoretical analysis and experimental study on the deep hole wall plugging cement slurry are carried out, and the quick solidified cement slurry suitable for the deep hole wall plugging treatment is developed, and the application effect is good. After plugging, the problem of leakage and collapse of broken strata is completely cured, the quality of borehole is guaranteed, and the efficiency of accident treatment is improved. (3) according to the drilling construction situation of mining area, the drilling equipment is selected. Based on the research of drilling technology and hole inclination control technology, this paper puts forward the construction technology scheme of deep hole drilling suitable for Xiaoqinling mining area. Aiming at the problem of borehole deflection in mining area, this paper puts forward the technical method to control the deviation inside hole. It has important guiding significance for the follow-up deep hole drilling construction in mining area.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P634.5

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