Products
Tunnels / Mines / Underground Tutor Perini
We build tunnels for highways, railroads, subways and rapid transit systems. We construct tunnels, shafts and other facilities for water supply and wastewater transport. We develop and equip underground mines for coal, salt, copper, gold and other minerals. We design and install innovative hoisting, elevator and vertical conveyance systems.get price
Mine Safety and Health Administration (MSHA) Sealing
design is applicable to conditions in an underground coal mine. In addition, the professional engineer is responsible for (1) the selection or development of design standards or methods, and materials to be used in seal construction; (2) the development and preparation of the structural analyses and designget price
How Underground Mining Works HowStuffWorks
Underground mines are the alternative to surface mines. Surface mines excavate from the top down, a method that can become inefficient at depths greater than about 200 feet (60 meters) [sources: Illinois Coal Association, De Beers].Undergrounds coal mines can drive 2,500 feet (750 meters) into the Earth and other types even deeper -- uranium mines can reach 6,500 feet, or 2 kilometers.get price
2017 Coal and Industrial Minerals Mining Activities
2017 Coal and Industrial Minerals Mining Activities Anthracite Coal Mining Reports 2017. Anthracite Statewide Production Summary (PDF) Anthracite Statewide Production Summary (Excel) Anthracite Underground Mines Summary by County (PDF) Anthracite Surface Mines Summary by County (PDF) Anthracite Coal Refuse Sites Summary by County (PDF)get price
Kiewit : Construction, Engineering and Mining Services
Construction, Engineering and Mining Services. © 2019 Kiewit Corporation. All Rights Reserved.get price
Underground Construction, Mine Seals, Reinforced Concrete
Slope Construction. In June of 2004 we accepted the challenging task of placing approximately 1,200 cubic yards of concrete underground for PinnOak Resources, Oak Grove Mine in Bessemer, Alabama, just south of Birmingham. The job consisted of placing concrete on 4000' of 18º slope 14 feet wide in the belt shaft that brings the coal out ofget price
Room and Pillar Design and Construction for Underground
In underground coal mines, a lot of major fatalities have occurred due to roof fall in the newly developed faces or galleries of coal mines during the development or production of coal. There areget price
Managing mining contracts Research Online
The eastern Australian coal industry has also grasped the contracting nettle in the 1990's. The use of contractors in both surface and underground mining is increasing. Thiess have underground mining contracts at Oakey Creek and Newlands and surface coal mining contracts at Collinsville, Burton Downs, Soutl1 Walker Creek and Mt Owen.get price
Slope Construction and Rehabilitation
Construction of slopes and tunnels for mining purposes is one of the major sectors of our work. We have constructed many miles of slopes of various sizes both from the surface to underground and underground from location to location. Lengths have varied from a couple of hundred feet to well over a mile. Configurations have been plain unlined for ventilation, with concrete floors for rubberget price
Chicago Tunnel Company Wikipedia
The Chicago Tunnel Company built a 2 ft (610 mm) narrow-gauge railway freight tunnel network under the downtown of the city of Chicago. This was regulated by the Interstate Commerce Commission as an interurban even though it operated entirely under central Chicago, did not carry passengers, and was entirely underground. It inspired the construction of the London Post Office Railway.get price
Coal Redpath Mining Contractors and Engineers
Australia is home to one of the largest coal sources in the world, and Redpath is a market leader in providing advanced development solutions to coal mine owners across Australia and the globe. With a focus on driving efficiency and achieving bottom-line objectives for our clients, we provide a complete scope of services, including:get price
Kiewit : Construction, Engineering and Mining Services
Construction, Engineering and Mining Services. © 2019 Kiewit Corporation. All Rights Reserved.get price
Mining & Construction online
Manually folding an 11-meter long feed from vertical to horizontal position can easily cause damage to a surface drill rig. Erik Hultgren, one of the persons behind Auto Feed Fold, explains how the process can now be automated.get price
Construction and Maintenance of Belt Conveyors for Coal
6 Construction and Maintenance of Belt Conveyors for Coal and Bulk Material Handling Plants also oscillating horizontally. This phenomenon results in internal agitation to the material on belt and therefore the material's external faces assume inclination at surcharge angle.get price
Underground v.s. Surface Coal Mines: Is Deep Drilling
Although both methods have their benefits and drawbacks, underground drilling may just be the cost worthy selection for you Mining for coal depends on many variables. The geology and environmental aspects play a vital role, but depth and quality of the seam is what brings home the bacon. Depending on where the seam (profitable bed of coal) is located, extracting this black gold can require aget price
Large-Deformation Failure Mechanism of Coal-Feeder Chamber
In traditional vertical coal bunker systems, a coal-feeder chamber (CFC) must bear the whole weight of the bunker. However, maintenance of CFCs within soft, swelling floor rock is a challenge faced in underground coal mines. Floor-heave control is a complex problem and is still not well-solved. Moreover, there is no report on the construction of bunker without a CFC, especially under such .get price
Contract Mining Labor GMS Mine Repair & Maintenance
GMS Mine Repair is the premier contract labor provider for Mining/Tunneling in North America. Specializing in underground mining construction services and products.get price
Underground Roads Manual: Construction and Maintenance .
Provide the means to improve underground road pavement construction and maintenance. Summary of Situation. Good roads are essential in moving men and materials to and from the coal face. With the application of good pavement construction and maintenance practices, the following is achievable: increased personnel time at the coal face.get price
D Construction 1488 S Broadway St Coal City, IL General
With an emphasis on road, bridge, concrete and utility construction, D Construction has extensive experience working on underground utilities, commercial buildings, water and sewer projects, highway projects, petrochemical plants, and asphalt and concrete projects. In addition, the company also owns and operates its own asphalt plant.get price
P & P Construction Inc. Industrial Company Isom
P & P Construction Inc., Isom, KY. 4,240 likes · 24 talking about this. Underground and Surface Mining Labor Contractors.get price
Home Coal Mine Services Pty Limited
CMS Underground Construction is a proudly Australian-owned & operated company. Since 2005 we have provided reliable and trustworthy equipment hire, equipment repairs, labour services to businesses across Australia in the Coal mining, and civil construction industries.get price
Mining & Construction online
Manually folding an 11-meter long feed from vertical to horizontal position can easily cause damage to a surface drill rig. Erik Hultgren, one of the persons behind Auto Feed Fold, explains how the process can now be automated.get price
Underground Mining
Every time you go underground, we're there with you — with specialized equipment that's quality-built from top to bottom and innovations to help you work more safely and efficiently. You can also count on us for deep product and application expertise, both from dedicated Underground Mining specialists and dealers. Talk with us to find the underground solutions you need.get price
Coal Mining Burrell Mining International
Burrell Mining is Your Partner in Underground Mining. Through years of market participation and innovation, Burrell Mining's proven array of products can be found throughout an underground coal mine. Our versatile Omega Block® is approved for constructing ventilation devices throughout a mine with any opening size.get price
How Underground Mining Works HowStuffWorks
Underground mines are the alternative to surface mines. Surface mines excavate from the top down, a method that can become inefficient at depths greater than about 200 feet (60 meters) [sources: Illinois Coal Association, De Beers].Undergrounds coal mines can drive 2,500 feet (750 meters) into the Earth and other types even deeper -- uranium mines can reach 6,500 feet, or 2 kilometers.get price
Coal mining Choosing a mining method Britannica
Coal mining Coal mining Choosing a mining method: The various methods of mining a coal seam can be classified under two headings, surface mining and underground mining. Surface and underground coal mining are broad activities that incorporate numerous variations in equipment and methods, and the choice of which method to use in extracting a coal seam depends on many .get price
Slope Construction and Rehabilitation
Construction of slopes and tunnels for mining purposes is one of the major sectors of our work. We have constructed many miles of slopes of various sizes both from the surface to underground and underground from location to location. Lengths have varied from a couple of hundred feet to well over a mile. Configurations have been plain unlined for ventilation, with concrete floors for rubberget price
Underground Mining
Every time you go underground, we're there with you — with specialized equipment that's quality-built from top to bottom and innovations to help you work more safely and efficiently. You can also count on us for deep product and application expertise, both from dedicated Underground Mining specialists and dealers. Talk with us to find the underground solutions you need.get price
Thyssen Mining
Underground mining contractor in the western U.S.A. and Canada. Also offers shaft sinking.get price
Underground Construction 1926.800 Occupational Safety
1926.800(a)(1) This section applies to the construction of underground tunnels, shafts, chambers, and passageways. This section also applies to cut-and-cover excavations which are both physically connected to ongoing underground construction operations within the scope of this section, and covered in such a manner as to create conditions characteristic of underground construction.get price
