[Mining Machinery] Introduction to Mining Engineering Machinery and Equipment – Popular Science on Rotary Drills
A rotary drill is a type of drilling equipment commonly used in large open-pit mines. Over the past half century, open-pit drilling equipment has evolved from “knock drills” to flame drills and percussion (down-the-hole) drills. Ultimately, rotary drills, with their advantages of large borehole diameters and high drilling efficiency, have become the most commonly used drilling equipment in large and medium-sized open-pit mines. This article will briefly introduce the rotary drills currently used by our company. Let’s get straight to the point.
Popular Science: Current Status of Rotary Drilling Rigs
For drilling large-diameter blastholes with a diameter greater than 200mm, rotary drills are often used both domestically and internationally. However, rotary drills are not only expensive to purchase but also have numerous issues, such as high drilling tool consumption, low hard rock drilling efficiency, and inconvenient site transfer.
Currently, the world’s three major manufacturers of rotary drills are all based in the United States: Bucyrus (BE, now acquired by Caterpillar), Ingersoll Rand (IR, now acquired by Atlas Copco), and P&H (now acquired by Joy International). Bucyrus and Ingersoll Rand have a long history of producing rotary drills, while P&H entered the market in 1991 with the acquisition of Gardner-Denver’s rotary drilling line. With technological advancements, rotary drills are continuously moving towards automation and intelligence. China should strive to develop rotary drills and achieve world-leading standards as soon as possible.
01. Sinosteel Hengzhong YZ-55D rotary drill rig
●Drilling standard diameter (mm): Ø310
●One continuous drilling depth (m): 19
●Drilling speed (m/min): 0~2
●Drilling tool lifting speed (m/min): 0～30
●Drill tool rotation speed (r/min): 0～90
●Drill rod diameter (mm): Ø273
Walking speed (km/h): 0-1.14
Gradeability: 25%
●Screw main air compressor motor (kW): 350
● Rotary AC variable frequency motor power (kW): 2×110
●Increase the power of AC variable frequency motor for walking (kW): 132
Hydraulic oil pump motor power (kW): 30
Drill stand (m): 14.50×6.11×28.80
Drilling rig down (m): 27.06×6.11×8.09
●Machine weight (t): ～150
Estimated price: 6 million yuan
In 1981, China’s first world-class YZ35 rotary drill rig was produced at Sinosteel Hengzhong. Over the following 30 years, Sinosteel Hengzhong has continuously updated and standardized this product to meet the diverse needs of its customers. The company has introduced four models of YZ35 rotary drill rigs (YZ35A, YZ35B, YZ35C, and YZ35D) and four models of YZ55 rotary drill rigs (YZ55, YZ55A, YZ55B, and YZ55D). As of January 30, 2014, the company had produced over 210 drill rigs of various models, which are now in use at over 40 mines nationwide and exported to countries as far afield as Pakistan, Vietnam, Peru, and Liberia.
The “YZ-55D Plateau Type” rotary drill rig, supplied by Sinosteel Weighing and Weighing to Tibet Julong Copper , was specifically developed for the harsh plateau environment and unique geological conditions of Tibet, located at an altitude of 5,500 meters. The rig utilizes advanced electro-hydraulic control technology and a high-volume air supply system, overcoming the challenges of equipment failures often associated with large temperature swings between day and night.
02. Sandvik 1175E rotary drill
●Drilling standard diameter (mm): Ø250
●One continuous drilling depth (m): 10.7
●Drilling speed (m/min): 0.5
●Drilling tool lifting speed (m/min): 34.8
●Drill rod diameter (mm): Ø194
Walking speed (km/h): 1.3-2.2
Gradeability: 25%
●Screw main air compressor motor (kW): 610
●Standard length of drilling rig (m): 13.7
●Machine weight (t): 87.6
Estimated retail price: 8.1 million yuan
Sandvik, a leading global supplier of mining equipment, tools, services, and technical solutions , officially launched its new 1175E electric rotary blasthole drill at the 2013 New Equipment and New Technology Symposium in Xichang, China. As an upgraded version of Sandvik Mining’s D75KS internal combustion blasthole drill, the 1175E electric blasthole drill offers increased efficiency while maintaining safety, a cutting-edge machine tailored for the emerging global mining market. Adhering to Sandvik’s consistent design and manufacturing philosophy, the 1175E provides customers with reliable, efficient, and cost-effective blasthole drills:
● Efficient Operating Environment: The two-person cab with air conditioning and a rotatable, ergonomically designed driver’s seat provides comfortable driving and a clear overview of drilling operations. Operators can choose to stand or walk while operating the drill using a fixed console, effectively improving productivity. The cab features a shock-absorbing design and is certified for Falling Object Protection (FOPS).
Frame and Drill Tower: A maintenance walkway surrounds the fuselage, allowing easy access to all components. The heavy-duty frame and drill tower are constructed of low-alloy, high-strength steel and feature extensive crossbeam support and reinforcement in high-stress areas to maximize service life.
● Cable reel: 1175E is equipped with an automatic retractable cable reel, making on-site operations safer and faster.
● Programmable Logic Controller (PLC) system: The PLC control system is highly reliable, easy to install and maintain, and is designed for complex control functions with powerful functional expansion space.
● Monitoring system and electrical system: The proven monitoring system and reliable electrical system can ensure efficient operation of the equipment.
The 1175E electric-driven rotary blasthole drill rig is assembled and manufactured in Jiading, China. The 1175E drill rig entered service at the Chongqing Iron and Steel Group’s Taihe Iron Mine in December 2012. On April 22, 2017, the 1175E rotary drill rig was first used at an altitude of 5,400 meters on the Qinghai-Tibet Plateau.
03. WKY rotary drill series
The WKY series rotary drill rig is a large-scale perforating equipment developed by Wuzhong Group. Drawing on the strengths of various domestic and international drilling rigs, this new design is tailored to the specific needs of mines and incorporates new technologies and materials. The rig retains the high drill frame, enclosed chain, and rack and pinion continuous pressure operation method. Hydraulic motors drive crawler travel, drill tool hoisting and pressure, and drill tool rotation, resulting in a simple structure and high efficiency. Innovations have been made in electrical control, hydraulic operation, visual monitoring, safe operation, and pipeline protection. The rig is available with either electric or diesel power, making it the most economical and ideal perforating equipment for various open-pit mines and construction projects. It can be widely used for drilling and blasting holes in large and medium-sized open-pit mines, as well as in transportation, railways, ports, hydropower, and other large-scale earthwork projects.
WKY rotary drill series features:
1. Use PLC, monitoring screen and touch screen to fully understand the various parameters and working conditions of the drilling rig.
2. The traveling, lifting, pressurizing and rotating of the drilling rig are all driven by hydraulic pressure.
3. The drilling rig is driven by two hydraulic motors respectively, and the crawler tracks are driven by the planetary reducer and the driving wheel. The drilling rig has a fast travel speed, strong climbing ability, good braking performance when climbing, and flexible turning.
4. The cab is designed and manufactured according to ergonomic principles. It is novel and beautiful, safe and comfortable, with good visibility, easy operation, flexibility and reliability.
5. The hydraulic manipulator unloads the drilling tools quickly and conveniently, and can be completed with one push.
6. The large air volume air compressor can quickly discharge slag, clean thoroughly and achieve high perforation efficiency.
7. The main structural parts such as the drilling rig platform, drill frame, walking crawler frame, etc. are made of high-strength low-alloy steel, which can ensure that the drilling rig will not deform or crack under the environmental conditions of ±45℃.
8. The drilling rig adopts two kinds of power: electric power or diesel engine, which can be selected by users.
9. Electric driven drilling rig equipped with high voltage cable reel is available for users to choose.
The above is the knowledge and skills about mining engineering machinery and equipment introduced to you by 100vr (100vr.com).[Mining Machinery] Introduction to Mining Engineering Machinery and Equipment – Popular Science on Rotary DrillsKnowledge is of great help to mining engineering machinery and equipment . This is also what novices need to pay attention to when learning about resource environment . If you have any questions about using 100weier, please click on the manual service on the right and we will have professional personnel to answer your questions.
