进口爆破孔钻机配套钻塔的研制          下载免费PDF全文

张西坤  宋秋锋  申寿长  刘大仲  浦静怡  曹继玉  魏少军 《探矿工程》2021,48(6):80-86

进口DMH90型爆破孔钻机配套钻塔整体性强,起落塔快捷方便,钻塔高度满足不换杆一次成孔,即钻塔有效高度略大于钻孔深度,承受振动冲击力大,施工工作环境恶劣。基于这些特点和难点,爆破塔长期依赖进口,导致成本增高、周期加长,为此进行了进口DMH90型爆破孔钻机配套钻塔的替代进口研究工作。本文介绍了DMH90型爆破孔钻机配套ZT27-45型爆破孔钻塔的研制过程,主要对ZT27-45型爆破孔钻塔的设计要点、结构型式、塔体选材、焊接工艺、防止变形、消除应力、质量检验等方面进行了探索、试验和总结。生产施工实践表明,ZT27-45型钻塔制造质量达到了设计要求,满足爆破孔施工的需要,实现了替代进口,达到了降低成本、缩短工期和提高机械性能的目的。  相似文献   

固体矿产绿色勘查钻探技术方法探索与实践          下载免费PDF全文

刘蓓  杨可  张晨  顾科伟  皮健伟  段晓 《探矿工程》2021,48(S1):39-46

西安矿产资源调查中心针对现有固体矿产地质调查（勘查）项目,积极探索和实践绿色地质勘查工作技术方法,因地制宜应用全液压履带钻机、便携式模块化钻机实施“一基多孔”,采用背包钻实施“以钻代槽”,通过优选环保型冲洗液,净化处理废弃冲洗液,控制临时占地规模等具体措施。与传统机场规格相比占地面积减少了80%~85%,临时便道修筑减少了60%~65%,工后复垦复绿达到了80%以上。通过绿色勘查成本费用分析,人员、临时用地（青苗）补偿、绿色环保材料及复垦复绿等费用成本总和降低了40%左右。最后探索实践了绿色勘查工作保障措施,对下一步绿色勘查工作提出了建议,为加强绿色勘查工作理念、完善相关的制度法规、激发绿色勘查工作活力提供了积极的导向。  相似文献   

HCW-90型全液压自动猫道钻杆支架起升同步性分析          下载免费PDF全文

盛洁  王清岩  钟蔚岭  李铠君  金赠伍 《探矿工程》2021,48(S1):316-323

本文针对HCW-90型全液压自动猫道的钻杆支架起升过程进行研究,采用多体动力学与液压控制系统联合仿真方法,分析了钻杆支架起升液压缸动作的同步性对钻杆从支架末端运动至平台档销限位处的动态过程的影响。重点讨论了起升液压缸同步性对管体空间位姿、动力学参数、管体运动至终了处与档销碰撞过程。进一步分析了管体受到限位后趋于稳定的动态过程和定位精度。此外,综合考虑管体运移的快速性、平稳性和定位准确性,对起升液压缸的液压控制系统的输入信号进行了合理调整,并在满足工作性能的前提下,提出了采用分流阀构建低成本液压控制系统的方案。  相似文献   

FDS-P型绳索取心钻具研制及试验研究          下载免费PDF全文

李鑫淼  胡建超  马莎莎  郑庆辉  王嘉瑞 《探矿工程》2021,48(S1):370-374

针对复杂地层绳索取心钻进时易出现的内管总成打捞失败问题,开展了FDS-P型绳索取心钻具研制。基于内管总成打捞失败原因分析,完成了FDS-P型绳索取心钻具设计,通过室内试验,初步验证了钻具结构设计的合理性。为进一步验证钻具性能,在贵州页岩气井开展了野外生产试验,先后完成16个回次取心钻进,累计进尺39.03 m,岩心采取率达到98%以上,其中有6个回次发生堵心,内管打捞全部成功,内管到位及堵心均得到了及时提示。实际应用结果表明,FDS-P型绳索取心钻具结构设计合理,具有良好的到位及堵心报信提示作用,内管总成打捞可靠性得到显著提升,有效提高了易堵心地层钻进效率及岩心采取质量。  相似文献   

基于DBSCAN算法的孔深测量与地层反演理论研究          下载免费PDF全文

李璇  赵大军 《探矿工程》2021,48(S1):47-51

论文针对地质勘探取心工况复杂、钻进深度大、事故发生率高、岩性复杂、钻进参数难以获取、无法实时掌握钻进状态的难题,在充分调研现有工况识别技术的采集原理、功能种类、现场实测的基础上,结合钻探智能化、自动化的发展方向,运用硬件与软件结合的思想,设计了实时测量钻探参数的方案。论文首次提出使用DBSCAN（针对噪声空间基于分布密度进行聚类的算法）密度聚类法分析钻进参数,结合光电编码器增量的正负性进行工况判别,以获取钻头位置以及钻孔深度。该方案可以判别钻进状态,获取钻进工艺参数,将测量数据作为所钻地层的可钻参数来反演地层。钻机的自动化、智能化研究能获取大量地层资料,有利于推进钻进工艺学发展,实现从经验钻探到智能钻探进的突破。同时,为智能钻进系统奠定基础。  相似文献   

Lateral dynamic response of a pipe pile in saturated soil layer          下载免费PDF全文

Changjie Zheng  Hanlong Liu  Xuanming Ding 《国际地质力学数值与分析法杂志》2016,40(2):159-184

This paper presents an analytical solution for the lateral dynamic response of a pipe pile in a saturated soil layer. The wave propagations in the saturated soil and the pipe pile are simulated by Biot's three‐dimensional poroelastic theory and one‐dimensional elastic theory, respectively. The governing equations of soil are solved directly without introducing potential functions. The displacement response and dynamic impedances of the pipe pile are obtained based on the continuous conditions between the pipe pile and both the outer and inner soil. A comparison with an existing solution is performed to verify the proposed solution. Selected numerical results for the lateral dynamic responses and impedances of the pipe pile are presented to reveal the lateral vibration characteristics of the pile‐soil system. Copyright © 2015 John Wiley & Sons, Ltd.  相似文献   

A 3D discrete FEM iterative algorithm for solving the water pipe cooling problems of massive concrete structures          下载免费PDF全文

Jing Cheng  T. C. Li  Xiaoqing Liu  L. H. Zhao 《国际地质力学数值与分析法杂志》2016,40(4):487-508

Water pipe cooling has been widely used for the temperature control and crack prevention of massive concrete structures such as high dams. Because both under‐cooling and over‐cooling may reduce the efficiency of crack prevention, or even lead to great harm to structures, we need an accurate and robust numerical tool for the prediction of cooling effect. Here, a 3D discrete FEM Iterative Algorithm is introduced, which can simulate the concrete temperature gradient near the pipes, as well as the water temperature rising along the pipes. On the basis of the heat balance between water and concrete, the whole temperature field of the problem can be computed exactly within a few iteration steps. Providing the pipe meshing tool for building the FE model, this algorithm can take account of the water pipe distribution, the variation of water flow, water temperature, and other factors, while the traditional equivalent algorithm based on semi‐theoretical solutions can only solve problems with constant water flow and water temperature. The validation and convergence are proved by comparing the simulated results and analytical solutions of two standard second‐stage cooling problems. Then, a practical concrete block with different cooling schemes is analyzed and the influences of cooling factors are investigated. In the end, detailed guidance for pipe system optimization is provided. Copyright © 2015 John Wiley & Sons, Ltd.  相似文献   

An inexpensive and portable drill rig for bedrock groundwater studies in headwater catchments     

C. P. Gabrielli  J. J. McDonnell 《水文研究》2012,26(4):622-632

Bedrock groundwater dynamics in headwater catchments are poorly understood and poorly characterized. Here, we present an inexpensive and portable bedrock drilling system designed for use in remote locations. Our system is capable of drilling bedrock wells up to 11 m deep and 38 mm in diameter in a wide range of bedrock types. The drill consists of a lawn mower engine adapted to rotate a diamond tipped coring bit, a small water pump to cool and flush the drill bit and a scaffolding platform for stable footing on steep slopes. The complete drilling assembly costs under $ 2000 USD. Here, we show proof‐of‐concept of our approach with 40 successful wells drilled in different geological substrates, including a conglomerate at the Maimai experimental catchment in New Zealand, volcanic breccias at the HJ Andrews experimental watershed in Oregon, USA, sandstone and siltstone at the Alsea watershed in Oregon, USA, and basalt at the Los Gavilanes experimental watershed in Veracruz, Mexico. We also present a transparent comparison between our design and other portable bedrock drilling systems and outline the strengths and weaknesses of each system. Copyright © 2011 John Wiley & Sons, Ltd.  相似文献   

地下管线探测的基本原理及解释方法研究   总被引：2，自引：0，他引：2  

封崇德  史保连 《物探与化探》1994,18(6):463-467

本文较详细地讨论了电磁直接探测法探测地下管线的基本原理和解释方法;提出了一种新的求解管线位置和深度、并给出探测结果可信度的向量交绘法。现场提供高可信度的结果;对管线探测仪器设备及应用效果作了介绍。  相似文献   

Equipment and procedure improvements for a lightweight,inexpensive, percussion core sampling system     

Mel A. Reasoner 《Journal of Paleolimnology》1993,8(3):273-281

This paper describes improvements for an inexpensive, lightweight percussion core sampling system and presents examples of recovered core. The system has proven most effective in remote settings where the weight of a coring system may be a constraint. Cores of up to 5.5 m in length have been recovered and the system has functioned successfully in water depths to 200 m. The system weighs approximately 25 kg and costs less than $450.00 (US).The percussion corer is designed for operation from a stable ice-pack surface. The core barrel assembly is lowered through the water column and driven into sediment with a weighted driver. A secondary line is used to raise and drop the driver. The driver is guided to the core barrel assembly by the main line. Cores are retrieved by a simple pulley system anchored to the ice pack.  相似文献