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US3871707A Expired / Lapsed US ⏱️ 0.0 years remaining

Method for mining and supporting the mine roof

Assignee: Consolidation Coal Co
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Filing: 1973-08-23
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Granted: 1975-03-18
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Expires: 1993-08-23
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Abstract

Abstract A self-propelled continuous mining machine dislodges material from the face in an underground mine entry and forms a first unsupported roof portion of a preselected length. A first portable temporary roof support is transported on the mining machine to a location beneath the first unsupported portion of the mine roof. The portable temporary roof support has a plurality of piston cylinder devices that are connected by conduits to a source of fluid under pressure on the continuous mining machine. Fluid under pressure from the mining machine first extends the first temporary roof support laterally to a location adjacent the entry ribs and thereafter extends the vertical portions of the temporary roof support into abutting relation with the mine roof and the mine floor to support the first unsupported portion of the mine roof. Thereafter the conduits are disconnected from the temporary roof support and the continuous mining machine advances in the entry and dislodges material from the face to form a second unsupported portion of the roof having substantially the same preselected length. The mining machine is thereafter withdrawn from the entry and a selfpropelled vehicle with apparatus for inserting permanent roof supports is moved into the entry. The apparatus first inserts permanent roof supports in the first unsupported portion of the mine roof while the first unsupported portion remains supported by the first portable temporary roof support. A second temporary roof support is carried by the self-propelled vehicle and the self-propelled vehicle advances to a location beneath the second unsupported portion of the mine roof. The second temporary roof support is extended into abutting relation with the mine roof and mine floor to provide support for the second unsupported portion of the mine roof while the permanent roof supports are inserted in the second unsupported portion of the mine roof. Thereafter the self-propelled vehicle for inserting permanent roof supports is withdrawn from the entry and the continuous mining machine advances in the entry to the first temporary roof support. The hydraulic conduit from the mining machine is connected to the first temporary roof support and retracts the temporary roof support both laterally and vertically and carries the first temporary roof support on the mining machine. The mining machine thereafter advances and again repeats the above procedure for dislodging material and again forms two unsupported portions of the mine roof having preselected lengths.

Inventors

  • 👤 Will B Jamison

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 05:25
CPC Classifications
E; E21; E21D; E21D19/00; E21D19/04; E21C; E21C27/00; E21C41/00; E21D20/00; E21D20/003

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 180 words
Method for mining and supporting a mine roof comprising, dislodging material from the face in a mine entry with a selfpropelled mining machine to form a first unsupported portion of a mine roof having a preselected length, a portable temporary support device adapted to be extended laterally and support a substantial portion of a mine roof, providing power from a power operated means on said selfpropelled mining machine to extend said portable temporary support device both laterally and into abutting relation with a substantial portion of said mine roof and the mine floor, supporting said first unsupported portion of said mine roof with said portable temporary support device, said temporary portable support device being detachable from said self-propelled mining machine, dislodging additional material from the mine face in said entry to form a second unsupported portion of said mine roof, inserting permanent roof supports in said first unsupported portion of said mine roof while said first unsupported portion remains supported by said portable temporary support device, and inserting permanent roof supports in said second unsupported portion of said mine roof.
Claim 2
Dependent Claim 180 words
Method for mining and supporting a mine roof comprising, dislodging material from the face in a mine entry with a selfpropelled mining machine to form a first unsupported portion of a mine roof having a preselected length, a portable temporary support device adapted to be extended laterally and support a substantial portion of a mine roof, providing power from a power operated means on said selfpropelled mining machine to extend said portable temporary support device both laterally and into abutting relation with a substantial portion of said mine roof and the mine floor, supporting said first unsupported portion of said mine roof with said portable temporary support device, said temporary portable support device being detachable from said self-propelled mining machine, dislodging additional material from the mine face in said entry to form a second unsupported portion of said mine roof, inserting permanent roof supports in said first unsupported portion of said mine roof while said first unsupported portion remains supported by said portable temporary support device, and inserting permanent roof supports in said second unsupported portion of said mine roof.
Claim 3
Dependent Claim 48 words
Method for mining and supporting a mine roof as set forth in claim 1 which includes, supporting a portion of said mine roof in said second unsupported portion with a second temporary roof support while inserting permanent roof supports in said second unsupported portion of said mine roof.
Claim 4
Dependent Claim 46 words
Method for mining and supporting a mine roof as set forth in claim 1 which includes, transporting said first temporary roof support to a location beneath said first unsupported portion of said roof on a self-propelled mining machine that dislodges the material from the mine face.
Claim 5
Dependent Claim 49 words
Method for mining and supporting a mine roof as set forth in claim 2 which includes, transporting said second temporary roof support to a location beneath said second unsupported portion of said roof on a self-propelled vehicle having apparatus thereon for inserting permanent roof supports in the mine roof.
Claim 6
Dependent Claim 64 words
Method for mining and supporting a mine roof as set forth in claim 4 which includes, providing power from a power operated means on said self-propelled vehicle to extend said second temporary roof support into abutting relation with said mine roof and the mine floor to provide support for a portion of said mine roof in said second unsupported portion of said mine roof.
Claim 7
Dependent Claim 182 words
Method for mining and supporting a mine roof as set forth in claim 1 which includes, said power operated means including a source of fluid under pressure on said mining machine, said power operated means connected to a fluid pressure actuated means on said first temporary roof support, transporting said first temporary roof support to a location beneath said first unsupported portion of said mine roof on said self-propelled mining machine, extending said first temporary roof support by said fluid under pressure from said power operated means on said mining machine to move said temporary roof support into abutting relation with said mine roof and said mine floor to provide support for said first unsupported portion of said mine roof, disconnecting said power operated means from said first temporary roof support while maintaining said first temporary roof support in abutting relation with said mine roof and said mine floor and supporting said first unsupported portion of said mine roof, and thereafter advancing said mining machine to dislodge material from said mine face and form said second unsupported portion of said mine roof.
Claim 8
Dependent Claim 166 words
Method for mining and supporting a mine roof comprising, advancing a self-propelled continuous mining machine in a mine entry and dislodging material from the mine face to form a first unsupported portion of a mine roof having a preselected length, transporting a temporary roof support to a location beneath said first unsupported portion of said roof on said self-propelled mining machine, providing power from a power operated means on said self-propelled mining machine to extend said temporary roof support into abutting relation with said mine roof and the mine floor to provide support for said first unsupported portion of said mine roof, thereafter advancing said self-propelled mining machine to dislodge additional material from said mine face to form a second unsupported portion of said mine roof, inserting permanent roof supports in said first unsupported portion of said mine roof while said first unsupported portion remains supported by said portable temporary roof support, and inserting permanent roof supports in said second unsupported portion of said mine roof.
Claim 9
Dependent Claim 166 words
Method for mining and supporting a mine roof comprising, advancing a self-propelled continuous mining machine in a mine entry and dislodging material from the mine face to form a first unsupported portion of a mine roof having a preselected length, transporting a temporary roof support to a location beneath said first unsupported portion of said roof on said self-propelled mining machine, providing power from a power operated means on said self-propelled mining machine to extend said temporary roof support into abutting relation with said mine roof and the mine floor to provide support for said first unsupported portion of said mine roof, thereafter advancing said self-propelled mining machine to dislodge additional material from said mine face to form a second unsupported portion of said mine roof, inserting permanent roof supports in said first unsupported portion of said mine roof while said first unsupported portion remains supported by said portable temporary roof support, and inserting permanent roof supports in said second unsupported portion of said mine roof.
Claim 10
Dependent Claim 58 words
Method for mining and supporting a mine roof as set forth in claim 7 which includes, extending said temporary roof support laterally beneath said first unsupported portion of said roof to a location adjacent the side walls of said entry and thereafter extending said temporary roof support into abutting relation with said mine roof and said mine floor.

References Cited (Backward Citations)

US2711634A Cited
US2904319A Cited
US3456982A Cited
US3493058A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-03-17 1978-09-16 1979-03-18 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-03-17 1982-09-16 1983-03-18 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-03-17 1986-09-16 1987-03-18 $7700.00 Window Closed / Lapsed

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