tunnels and underground excavations | History, Methods ...
Tunnels and underground excavations, horizontal underground passageway produced by excavation or occasionally by nature's action in dissolving a soluble rock, such as limestone.A vertical opening is usually called a shaft.Tunnels have many uses: for mining ores, for transportation—including road vehicles, trains, subways, and canals—and for conducting water and sewage.Get Price
Drilling and blasting - Wikipedia
Drilling and blasting is the controlled use of explosives and other methods such as gas pressure blasting pyrotechnics, to break rock for excavation. It is practiced most often in mining, quarrying and civil engineering such as dam, tunnel or road construction. The .Get Price
DFJ-2C50 Fully Hydraulic Double Boom Drilling Jumbo for Tunnel
Dfj-2c50 Fully Hydraulic Double Boom Drilling Jumbo For Tunnel, Find Complete Details about Dfj-2c50 Fully Hydraulic Double Boom Drilling Jumbo For Tunnel,Used Tunnel Boring Machine,Jack Hammer Drilling Machine,Bore Well Drilling Machine from Mine Drilling Rig Supplier or Manufacturer-Zhengzhou Defy Mechanical & Electrical Equipment Co., Ltd.Get Price
Probe Hole Drilling and Pre-Excavation Grouting
Probe Hole Drilling and Pre-Excavation Grouting Probe Drilling: Drill, maintain, and monitor probe holes in the shaft and ... Probe Drilling -Eleven tunnel sections – 300lf to 1600lf . 2ea 2-1/4" Probeholes 60-100lf/ea ... PEG - Total 230hrs (2wks) Water inflows: • Post mining steady state water inflow 1,410gpm Concrete Liner 37,500lf w ...Get Price
SPECIFICATIONS & GUIDELINES
interior of the tunnel, it shall be justified by the original subsurface geotechnical investigation and design. Tunnel lining and bracing should consist of steel ribs and steel spreaders (dutchmen) with wood, concrete, or steel lagging, or with bolted steel liner plates.Get Price
Production drill rigs | Epiroc US
Epiroc's long-hole drilling rigs are used for production drilling in underground mining applications. With a variety of feed lengths, positioning configurations, rock drills, and an extensive options program; we offer the optimum long-hole drilling rig for every application.Get Price
(PDF) Underground mining Methods - ResearchGate
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text.Get Price
Tunnelling: Mechanics, methods, and mistakes
The effect of this is the transfer of a large amount of the overburden, W 1, onto the abutments of the tunnel. This tunnel will require steel supports, and they will be supporting a load equivalent to Hp, which will depend on the characteristics of the rock mass and the dimensions of the tunnel. Figure 4. Movement of loosened rock toward a tunnelGet Price
DFJ-1R14 Single Boom Underground Hydraulic Drilling Jumbo ...
Description of Rail Mounted Drilling Jumbo DFJ-1R14 1. DFJ-1R14 rail type hydraulic drilling jumbo is mainly used for tunnel of mining and metallurgy and tunneling project of culvert. The drilling speed is 0.8-2 meter per minutes. The design of whole machine is strong.Get Price
DT922i TUNNELING DRILLS
Drilling with extended jacks 3 500 mm 9 000 14 000 14 800 W 1 965 250 2 665 A C R 5 385 750 750 2 850 4 150 Overall length 15° 15° H 1 160 2 300 DT922i 4. DT922 i - TUNNELING DRILLS Mining and Rock Technology reserves the right to make changes to the information on this data sheet without prior notification to users.Get Price
DFJ-1W31 Single Boom Underground Hydraulic Drilling Jumbo ...
DFJ-1W31 drilling jumbo is specially designed for underground tunnel mining, metallurgy, water electricity, railways, highways, tunnels, culverts narrow mine roadway excavation blasting holes and drill holes, the work mechanism adopts full hydraulic pressure drive, drilling speed can reach 0.8~2 m/min, the engine provides walking power, the fuselage is small, compact structure, low center of ...Get Price
Underground mining (hard rock) - Wikipedia
Underground hard rock mining refers to various underground mining techniques used to excavate hard minerals, usually those containing metals such as ore containing gold, silver, iron, copper, zinc, nickel, tin and lead, but also involves using the same techniques for excavating ores of gems such as diamonds or rubies.Get Price
Tunnel Underground Mining Drill Rig Dfj-1w31 - Buy ...
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Mining - Wikipedia
Mining is the extraction of valuable minerals or other geological materials from the Earth, usually from an ore body, lode, vein, seam, reef or placer deposit.These deposits form a mineralized package that is of economic interest to the miner. Ores recovered by mining include metals, coal, oil shale, gemstones, limestone, chalk, dimension stone, rock salt, potash, gravel, and clay.Get Price
China Dfj-1W31 Hydraulic Underground Jumbo Drills Mining ...
Jumbo Drill, Drill Jumbo, Jumbo Drill Rig manufacturer / supplier in China, offering Dfj-1W31 Hydraulic Underground Jumbo Drills Mining Machine, 200m Water Well Drill Rig Machine for Drilling Soil and Rock, Xy-200f Drill Rig for Water Well Drilling Core Drill Machine and so on.Get Price
Underground Drilling - The Urban Crows Blog
Underground mine geos are perhaps even more reliant on drilling. When you're in the ore body, a drill is the indispensable tool that adds the crucial 3 rd dimension to your work, and every part of the underground mining process eventually draws on the drill results.Get Price
Underground exploration products by Boart Longyear
Underground Rigs. Boart Longyear offers an innovative range of underground diamond coring equipment for mineral development and exploration. Providing reliable, high-performance deep hole drilling with economical maintenance costs, our LM™ Modular Diamond Drill System is used extensively all over the world under varying climate conditions.Get Price
How Raise Drill Works - YouTube
Dec 12, 2013· Raise drilling is used to create large drill holes -- up to 7.6 meters in diameter. The holes, or tunnels, are used to connect mine shafts, power plant tunnels or channels for rainwater and ...Get Price
Underground Archives - Mining Technology | Mining News and ...
Mining Technology lists the top ten biggest gold mines in the world based on contained gold reserves. ... explosives and blasting systems manufacturer Orica has released its new blast design and modelling software for underground mining applications. ... Before the invention of Tunnel Boring Machines (TBMs), drilling and blasting was the only ...Get Price
blasting mining underground - YouTube
Mar 13, 2015· blasting mining underground serz rog. Loading... Unsubscribe from serz rog? ... Demolition Dave Drilling and Blasting 591,643 views. 7:18. Miniature Dynamite, Blasting rocks for Opals.Get Price
DFU-300 Fully Hydraulic Underground/Tunnel Drilling Rig
DFJ-2W100 Double Booms Mining/Tunneling Jumbo Drill. DFHD-180 Horizontal Directional Drilling Rig. DFU-300 Fully Hydraulic Underground/Tunnel Drilling Rig. 1. Max. 300m 2. Underground mining exploration 3. 360 degree rotation. Share with: Description Parameter. I. General Introduction of Tunnel Core drilling rig. DFU-300 hydraulic underground ...Get Price
Tunnel boring machine - Wikipedia
A tunnel boring machine (TBM), also known as a "mole", is a machine used to excavate tunnels with a circular cross section through a variety of soil and rock strata.They may also be used for microtunneling.They can bore through anything from hard rock to sand.Tunnel diameters can range from one metre (3.3 ft) (done with micro-TBMs) to 17.6 metres (58 ft) to date.Get Price
Drilling Machines - EOLSS
CIVIL ENGINEERING – Vol. II - Drilling Machines - H.Watanabe ©Encyclopedia of Life Support Systems (EOLSS) Figure 3: Typical drilling applications a) underground mining and tunneling, b) quarrying, c) strip mining For large-scale open pit mining, it is common to use rotary drilling rigs equipped with three-cone bits or DTHs to drill blastholes.Get Price
Breakthrough! Giant drill smashes open world's longest ...
Oct 15, 2010· Breakthrough! Giant drill smashes open world's longest tunnel under Swiss Alps ... Swiss engineers have smashed through the last stretch of rock to create the longest tunnel in the world. A ...Get Price