J-lok Co.

Fci Holdings Delaware, Inc.

Lumin Ma

John C Stankus

Dakota Faulkner

Richard Wharton

John Stankus

Jinrong Ma

A pumpable resin system for installation of mine roof bolts includes a resin feed pump in fluid communication with a resin source, a catalyst feed pump in fluid communication with a catalyst source, a resin injection cylinder pump in fluid communication with the resin feed pump, with the resin feed pump configured to transfer resin to the resin injection cylinder pump when the resin feed pump is actuated, a catalyst injection cylinder pump in fluid communication with the catalyst feed pump, the catalyst feed pump configured to transfer catalyst to the catalyst injection cylinder pump when the catalyst feed pump is actuated, a hydraulic piston, with the resin injection cylinder pump and the catalyst injection cylinder pump slaved together and controlled by the hydraulic piston, a resin line in fluid communication with the resin injection cylinder pump, and a catalyst line in fluid communication with the catalyst injection cylinder pump.

Pumpable resin system

A pumpable resin system for installation of mine roof bolts includes a resin feed cylinder pump, a catalyst feed cylinder pump, a resin cylinder pump in fluid communication with the resin feed cylinder, with the resin feed cylinder configured to transfer resin to the resin cylinder pump when the resin feed cylinder pump is actuated, a catalyst cylinder pump in fluid communication with the catalyst feed cylinder, with the catalyst feed cylinder configured to transfer catalyst to the catalyst cylinder pump when the catalyst feed cylinder pump is actuated, a resin line in fluid communication with the resin cylinder pump, and a catalyst line in fluid communication with the catalyst cylinder pump.

Pumpable two component resin

A mine bolt includes an elongated body having a first end and a second end positioned opposite the first end, with the elongated body having a first threaded section, a second threaded section, and a non-threaded section positioned between the first threaded section and the second threaded section. The non-threaded section is configured to yield under loading when the mine bolt is installed with grout in a bore hole.

Corrosion resistant yieldable bolt

A rock bolt system includes a fitting including a main body defining a central opening configured to receive a rock bolt and a grout body defining a space between the main body and the grout body, with the main body defining a grout opening in fluid communication with the central opening. The main body is rotatable relative to the grout body, with the grout body defining a resin port and a catalyst port. The resin port and the catalyst port are in fluid communication with the space and the grout opening of the main body. The system further includes a rock bolt defining a central opening, with the central opening of the rock bolt configured to be in fluid communication with the central opening of the fitting when the rock bolt is secured to the fitting.

A pumpable resin system for installation of mine roof bolts includes a resin reservoir configured to receive resin, a catalyst reservoir configured to receive catalyst, a resin pump arrangement in fluid communication with the resin reservoir, a catalyst pump arrangement in fluid communication with the catalyst reservoir, a delivery line in fluid communication with at least one of the resin pump arrangement and the catalyst pump arrangement, and a bolter arm configured to drill boreholes and install mine roof bolts. The delivery line is configured to deliver resin and catalyst from the resin reservoir and the catalyst reservoir to a borehole via the bolter arm.

A rock bolt system includes a fitting having a main body defining a central opening configured to receive a rock bolt, with the main body defining a grout opening in fluid communication with the central opening, and a grout body defining a space between the main body and the grout body. The main body is rotatable relative to the grout body, with the grout body defining a resin port and a catalyst port. The resin port and the catalyst port are in fluid communication with the space and the grout opening of the main body. A rock bolt defines a central opening, with the central opening of the rock bolt configured to be in fluid communication with the central opening of the fitting when the rock bolt is secured to the fitting.

A method for designing and fabricating a mine seal includes determining an initial thickness for a mine seal based on a predetermined underground opening, developing and solving a numerical model for response of the mine seal upon application of a blasting pressure, and determining whether the mine seal meets predetermined design criteria. A mine seal having a minimum seal thickness may be fabricated after determining the mine seal meets the predetermined design criteria.

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Pittsburgh, PA, United States of America

Lumin Ma