shaft sinking rock

  • mining engineering: Shaft Sinking

    Larger mines have typically employed circular shafts lined with concrete poured in place as the sinking advances. Today, independent mining contractors sink most shafts. While there have been significant technical advances, no world records have been broken for rate of shaft-sinking advance in hard rock since 1962. Part of the problem is that mining contractors have no discretionary funds to ...

  • About Us – Shaft Sinkers International

    Shaft Sinkers is the mining operations company for the UMS Group and has the sinking experience as well as the design and mine shaft engineering capability to execute shafts as deep as 3000 meters through almost every type of rock strata. Shaft Sinkers understands that rapid access to deep level ore bodies is of critical importance to its clients.

  • Vertical Shaft Sinking Machine (VSM) - .

    Vertical Shaft Sinking Machines (VSM) in operation. For quick and reliable construction of vertical shafts, Herrenknecht developed its VSM (Vertical Shaft Sinking Machine) technology, today an established product on the market. This unique mechanized shaft sinking equipment shows its strengths particularly below groundwater. In general, it can ...

  • Optimization of mucking and hoisting operation .

    The sinking scenarios differ concerning blasting round length, shaft diameter, depth and rock properties. The selected bucket sizes of each mucking equipment are adapted to the respective operating condition. For this comparison, it is assumed that hoisting performance is always higher than maximum mucking capacity. The calculated data regarding mucking time and capacity are based on a ...

  • Excavation cycle times recorded during sinking of .

    Actual excavation cycle time was recorded during sinking of the Ventilation Shaft in the MIU. • Operating at greater depth and excavating harder rock significantly affected the sinking speed. • Constraints on construction, safety assurance and maintenance caused increase in actual times.

  • Mechanised hard-rock shaft-sinking tech being .

    The mechanised hard-rock shaft sinking technology was used to sink a 10-m-deep test shaft, with a 4 m diameter, in 300 MPa norite rock, which is about as hard as mild steel. Jordaan claimed that...

  • Vertical Shaft Sinking Machine

    Vertical Shaft Sinking Machine. 2019118the ventilation system for the shaftsinking operation used refrigerated air to cool the miners as they worked that system however was designed for hot rock not hot water as a result of the heat load coming into the shaft we have had to suspend shaftsinking operations and upgrade the ventilation by as much as three times goodell said

  • Case Study – Blind Shaft Sinking for BHP Jansen .

    This pioneering approach is changing shaft sinking in soft and medium to hard rock. INTRODUCTION The Jansen Mining project located approximately 150 km east of the city Saskatoon is the location of the BHP owned potash mine with an expected mining output of eight million tonnes annually upon completion. Mining contractors DMC Mining Services have used two Herrenknecht Shaft Boring .

  • Vertical Shaft Sinking Machine (VSM) - .

    Vertical Shaft Sinking Machines (VSM) in operation. For quick and reliable construction of vertical shafts, Herrenknecht developed its VSM (Vertical Shaft Sinking Machine) technology, today an established product on the market. This unique mechanized shaft sinking equipment shows its strengths particularly below groundwater. In general, it can ...

  • Selection of Shaft Sinking Method for .

    ""Abstract : Khalashpir coal field is the 3rd largest coal field in Bangladesh, where coal occurs at depths of 257m to 483m below the surface. Considering the Geological, Geo-environment and other related geoengineering information,

  • Deep Thinking: Shaft Design and Safety for a .

    A Snapshot of China's Coal Progress Three papers presented at the Shaft Design and Construction conference looked at how shaft-sinking technology has developed in China in recent years, and at the construction of a 30 million mt/y mine—a paper included, the chairman said, not for its specific focus on shafts per se, but as an indication of the level of investment currently being poured ...

  • Excavation cycle times recorded during sinking of .

    Actual excavation cycle time was recorded during sinking of the Ventilation Shaft in the MIU. • Operating at greater depth and excavating harder rock significantly affected the sinking speed. • Constraints on construction, safety assurance and maintenance caused increase in actual times.

  • Shaft Sinking for Small-Scale Mining in Africa

    Artisanal shaft sinking is a difficult and often dangerous task with common risks being falling down the shaft during travelling, and struck by rocks or material from the shaft collar area as depicted in the schematics shown Figure 2.

  • Mechanised hard-rock shaft-sinking tech being .

    The mechanised hard-rock shaft sinking technology was used to sink a 10-m-deep test shaft, with a 4 m diameter, in 300 MPa norite rock, which is about as hard as mild steel.

  • Sinking America's Deepest Shaft | E & MJ

    Modern Shaft Sinking Techniques. Bulk and packaged emulsion non-electric and electric detonators. Resolution Copper No. 10 shaft full bench blast pattern plan. Similar to all mining projects, shaft-sinking operations require a lot of dedicated people to be successful, explained Tom Goodell, general manager-shaft development for Resolution Copper. A photo of all of the people working on the ...

  • Unit 16 Mine Development - Mining and Blasting

    Shaft Sinking (Soft Ground) Method: a) Wood/Steel Piling The first set of piles, forming a circle around the shaft site is started at the surface. As the piles are driven down, the ground is excavated, and a circular crib is put in every few feet. In this way the shaft is sunk in a series of short wooden cylinders.

  • Excavation cycle times recorded during sinking of .

    Actual excavation cycle time was recorded during sinking of the Ventilation Shaft in the MIU. • Operating at greater depth and excavating harder rock significantly affected the sinking speed. • Constraints on construction, safety assurance and maintenance caused increase in actual times.

  • Numerical simulation and measurement analysis .

    19.02.2019 · Freezing shaft sinking refers to the construction method in which, prior to shaft excavation, artificial cooling is used to freeze the unstable water-bearing strata around the shaft into a closed cylindrical frozen wall to resist the formation pressure, isolate the shaft from groundwater and carry out excavation and support operations under the protection of the frozen wall.

  • US4701073A - Shaft sinking method - Google .

    A method of sinking shafts comprising excavating a series of lifts wherein each lift is excavated by drilling a pattern of blast holes for the full depth of the lift including boring a large diameter hole and creating a chamber at the lower end of the large diameter hole, blasting the walls of the chamber to deposit rock material into the chamber, extracting at least a portion of the rock ...

  • 2018: Mechanised shaft sinking technology SBR .

    Herrenknecht developed the SBR for the mechanised sinking of blind shafts in soft to medium-hard rock. Based on the proven technology of the Herrenknecht Vertical Shaft Sinking Machine (VSM) it offers improved safety performance compared to conventional shaft sinking methods while also achieving higher advance rates.

  • Shaft Sinking Through High Water Bearing Rocks

    The smking of shafts through water bearing rock., and particularly dolomite has always been a hazardous undertaking The greater part of the Witwatersrand gold bearing conglomerates are overlain by the Transvaal dolomItes and several shafts and mines in the early gold mining days were lost due to influx of uncontrollable quantities of water. This paper des.:ribes the principles and practices ...

  • Mechanised hard-rock shaft-sinking tech being .

    The mechanised hard-rock shaft sinking technology was used to sink a 10-m-deep test shaft, with a 4 m diameter, in 300 MPa norite rock, which is about as hard as mild steel.

  • Deep Thinking: Shaft Design and Safety for a .

    As increasingly deeper deposits are discovered and developed, shaft-sinking and hoist technology look for a new lease on life. By Simon Walker, European Editor. The dominance of open-pit mining during the second half of the 20th century has meant that many of today's engineers and technicians have never experienced underground mining, nor the key infrastructure needed to access deep deposits ...

  • Shaft sinking 1 - LinkedIn SlideShare

    26.05.2016 · Excavation method Drilling & blasting: A shaft is constructed by drilling holes and filling them with explosives. Using this method, drilling and blasting can sink around 5-10 metres in one blast. This is very labour-intensive, unsafe and has high running costs. The most viable alternative for shafts up to 100m in length..

  • Deep Thinking: Shaft Design and Safety for a .

    As increasingly deeper deposits are discovered and developed, shaft-sinking and hoist technology look for a new lease on life. By Simon Walker, European Editor. The dominance of open-pit mining during the second half of the 20th century has meant that many of today's engineers and technicians have never experienced underground mining, nor the key infrastructure needed to access deep deposits ...

  • A METHODOLOGY FOR LINING DESIGN OF CIRCULAR MINE SHAFTS .

    A METHODOLOGY FOR LINING DESIGN OF CIRCULAR MINE SHAFTS IN DIFFERENT ROCK MASSES Güler, Erdoan M.Sc., Department of Mining Engineering Supervisor: Asst. Prof. Dr. Hasan Öztürk January 2013, 72 pages The objective of this thesis is to predict lining thickness inside circular mine shafts. A numerical study with different rock mass strengths and different in-situ non-hydrostatic .

  • Shaft sinking - LinkedIn SlideShare

    Shaft sinking 1. Akshay S Krishna VNIT Nagpur 2. Mining the mineral deposits Temporary storage and treatment of sewage Bridge and other deep foundations Hydraulic lift pits and Wells In conjunction with tunneling system or network for the purpose of lifts, escalators,stair and ladder- ways,Ventilation, drainage and pumping.

  • Joy VSM-14 Vertical Shaft Mucker - Underground .

    Historically, the methods for removing the muck after shaft sinking have been tedious and manual. Cactus grab systems are slow and require specific rock sizes to work adequately. Other mucker systems are often unreliable, requiring frequent boom repairs that halt production.

  • Shaft sinking - LinkedIn SlideShare

    12.  Use of sinkers to drill holes of 32–38 mm. diameter and the shaft jumbos (equipped with number of drifters) to drill holes of 40– 55 mm. dia. is made  The hole's length varies between 1.5 m and 3 m if the sinkers are used, and it can be up to 5 m in case of the shaft jumbos  Wedge cut, pyramid and step cut are the common drilling patterns adopted

  • Shaft mining - Wikipedia

    Shaft mining or shaft sinking is excavating a vertical or near-vertical tunnel from the top down, where there is initially no access to the bottom.. Shallow shafts, typically sunk for civil engineering projects differ greatly in execution method from deep shafts, typically sunk for mining projects.When the top of the excavation is the ground surface, it is referred to as a shaft; when the top ...

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