Perforación con martillo en fondo | 33/118 | UPV

Title: Down-the-Hole Hammer Drilling Description: The objectives of this learning object are to help students understand how down-the-hole hammer drills work, to introduce their characteristics and applicability, and to evaluate the advantages and disadvantages of the system. To this end, the content is structured into four sections: introduction and operation, main components, technical characteristics, and advantages and disadvantages. Yepes Piqueras, V. (2014). Down-the-Hole Hammer Drilling. https://riunet.upv.es/handle/10251/38661 Automatic description: In this video, the instructor introduces down-the-hole hammer (DTH) drilling, a technique developed in 1951 that increases the efficiency of deep drilling by striking the bottom of the borehole directly, reducing energy loss. He explains that this method allows for homogeneous drilling and depths exceeding 100 meters, with rates of 60 to 100 meters per shift. The video describes the system's components, such as the cylinder, the drill bit, and the drive mechanism, usually pneumatic or hydraulic, which also helps remove the generated cuttings. It also details that typical drilling diameters range from 85 to 200 millimeters and that this technique is ideal for rocks with medium to high compressive strength. It highlights the technical characteristics of down-the-hole (DTH) drilling, such as drilling speed, hammering frequency, and the thrust required for operation. The advantages of down-the-hole hammer drilling are compared with other methods, emphasizing its lower hole deviation, suitability for fractured rock, and lower cost per linear meter in hard rock and large diameters. However, disadvantages are also noted, such as the reduced penetration rate, the need for high-pressure compressors, and the risk of hammer loss during drilling. The video summary concludes that down-the-hole hammer drilling is efficient for certain rock types and depths, emphasizing its competitiveness with top-mounted hydraulic hammer drilling at certain diameters. Author: Víctor Yepes Piqueras Course: This video is 33/118 of the course Construction Procedures | Universitat Politècnica de València (UPV).    • Curso Procedimientos de Construcción | Uni...   Universitat Politècnica de València UPV: https://www.upv.es More videos at:    / valenciaupv   Access our MOOCs: https://upvx.es #Drilling #Boreholes #GeotechnicalEngineering #Machinery #CivilEngineering #ConstructionProcedures #ConstructionEngineering