Shaft Sinking

R. G. Johnson has been providing industry-leading shaft sinking services
to its customers for nearly a century.

Sample Projects

Click on any project to view job summary.

Shaft Sinking: Marshall County 5 North #4 Airshaft

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Location:

Cameron, WV

Customer:

Murray Energy Corporation

Scope of Work:

Turn-Key Ventilation Shaft Construction

Project Overview:

The Marshall County 5 North #4 Airshaft is a dual compartment (intake/return) shaft, used as a primary source of ventilation for mining progression in the Marshall County mine. The shaft measured 24 feet in finished diameter and ran approximately 920 feet from the top of surface concrete to the bottom of coal.

In addition to standard reinforced concrete lining in the collar and main shaft area, R.G. Johnson installed a precast divider wall along with a custom bottom station, which included arched entries to facilitate maximum support and air volume.

Shaft Sinking: River View South Portal

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Location:

Waverly, KY

Customer:

Alliance Resource Partners, L.P.

Scope of Work:

Large Diameter, multi-seam Bottom Station Airshaft & Portal

Project Overview:

The River View South Portal is a 24 foot diameter, approximately 360 feet deep vertical airshaft, built primarily to accommodate elevator access to both the #11 and #9 coal seams. R.G. Johnson was responsible for all primary elements of shaft design and construction (the excavation, support and lining of the shaft), as well as the installation of the shaft’s downhole structural elevator steel.

This project highlights our ability to fulfill our customers’ specific customized needs, as evidenced by multiple mine entry levels and configurations occurring within the same vertical shaft.

Shaft Sinking: BMX 7 North #1 Airshaft & Portal

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Location:

Sycamore, PA

Customer:

CONSOL Energy Inc.

Scope of Work:

Large Diameter Airshaft & Portal

Project Overview:

The Bailey Mine Extension (BMX) 7 North # 1 Airshaft is a 25 foot, dual compartment airshaft. It serves as a ventilation shaft and a portal into the mine. The shaft is approximately 1,100 feet deep and includes a pre-cast concrete curtain wall which divides the shaft into dual compartments (intake/return sections). RG Johnson completed the pressure grouting, excavation, support, and lining of the shaft, as well as the installation of the shaft's downhole elevator structural steel.

Shaft Sinking: Tygart #1

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Location:

Grafton, WV

Customer:

Arch Coal, Inc. (Formerly ICG)

Scope of Work:

Circular and Round-End Shafts, Initial Mine Development and Hoist Services

Project Overview:

The first shaft was a circular shaft, 16 feet diameter x 315 vertical feet with a customized 4-entry bottom station that housed a vertical conveyor and bottom conveyor belt transfer area. Prior to slope completion, this shaft and conveyor system transferred all mined coal to the surface for early marketability. In the long run, the shaft serves the mine as a return ventilation facility.

Our second shaft, a round-end 18 feet wide x 35 feet long x 315 vertical feet dual compartment shaft serves as an elevator, equipment portal, emergency escape, and ventilation shaft. From this shaft bottom, we conventionally excavated, supported and shotcreted an initial Mine Block area to establish a preliminary mine ventilation circuit.

Once the Mine Block area was ventilated properly then the mine began its traditional mining cycle that we supported by lowering all equipment and supplies down the shaft.  Mine personnel accessed the new mine via the shaft elevator. 

All coal was hoisted from the mine with our shaft equipment until such time that it could be loaded onto the vertical conveyor and then subsequently to the main mine conveyor system. This sequence of operation permitted the mine owner to optimize their mine development by concurrently completing the slope and main mine belt haulage while simultaneously developing the main coal seam via our round-end shaft.

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