Permanent mine bulkhead seal and method for constructing same

Details Permanent mine bulkhead seal and method for constructing same Permanent mine bulkhead seal and method for constructing same

1996-01-30

1998-03-10

Graysay, Tamara L.

Hydraulic and earth engineering

Underground passageway, e.g., tunnel

4051501, 405151, 454169, 523094, 524075, 5274214, E02D 2900, E04B 100, E21D 900, E21F 114

Patent

active

057253277

ABSTRACT:
A water-resistant mine bulkhead or seal is provided in which two walls are constructed across the mine entry. One of the walls is constructed in layers. After a lower portion of the layered wall is erected, a first layer of gravel is provided between the walls. The gravel is then saturated with a binding material such as a polyurethane composition so that the binding material fills the voids between the gravel particles. Additional layers of gravel subsequently saturated with the binding material are provided until the gravel layer is equal in height to the lower portion of the layered wall. The layered wall is then further erected and the process continues until the layered wall is completely constructed and the binding material-saturated filler material emplaces the mine roof. Finally, the exposed surface of the exposed wall is coated with a sealant. Alternatively, the binding material and filler material can be pre-mixed and injected into the space between the two walls. If desired, binding material alone can be inserted between the two walls.

REFERENCES:
patent: 2911794 (1959-11-01), Pearson
patent: 3927719 (1975-12-01), Maser
patent: 4055074 (1977-10-01), Thimons et al.
patent: 4201497 (1980-05-01), Artweger
patent: 4237182 (1980-12-01), Fulmer et al.
patent: 4516879 (1985-05-01), Berry et al.
patent: 4707962 (1987-11-01), Meheen
patent: 5174688 (1992-12-01), Meheen
patent: 5385504 (1995-01-01), Hussey et al.
Greninger et al., Evaluation of Solid-Block and Cementitious Foam Seals, U.S. Dept. of Interior, 1991.

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