Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS3620573 A
Publication typeGrant
Publication dateNov 16, 1971
Filing dateApr 10, 1969
Priority dateApr 10, 1969
Publication numberUS 3620573 A, US 3620573A, US-A-3620573, US3620573 A, US3620573A
InventorsOxford Desmond De Villiers
Original AssigneeOxford Desmond De Villiers
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Mining method and apparatus therefor
US 3620573 A
Previous page
Next page
Description  (OCR text may contain errors)

D United States Patent 3,620,573

[72] Inventor DesmondDe Villiers Oxford 753,092 2/l904 Neukirch 299/35 33 New Forest Road, Forest Town. 3.459. I 69 8/196) McNulty 299/?0 X Johannesburg, Republic of South Africa FOREIGN PATENTS 21 l. 7 Qfg No 23 6 1969 599.284 3/1948 Great Britain 299 I8 [45] Patented Nov. 16, 1971 Primary Examiner-Ernest R Purser [54] MINING METHOD AND APPARATUS THEREFOR ABSTRACT: An apparatus for mining ore of a type which is 3 Claims. 8 Drawing Figs. located in relatively narrow strata within the earth whereby it [52] U S Cl 299/35 is profitably disadvantageous to move large quantities of earth Bi 299/19 so to gain physical access thereto, the apparatus comprising 1 Int Cl 47/08 means for sawing away of the narrow strata by a flat elongated Fieid 299718 '9 endless chain saw mechanism mounted on a pair of carriages 35 4 riding on rails in parallel tunnels the mechanism having a thickness of a roximatel the thickness of the ore-hearin PP y g 5 References Cited strata and the chain saw extending transversely hetvieen the tunnels wherein the ground material is sluiced into the tunnels UNITED STATES PATENTS and a pumping station provided to transport the material to 733,073 7/1903 N6Ukll'CiL: i. 299/19 the f PATENTED NUV 16 IHTI 3,6 20, 573

sum u [1F 4 //Vl/E/V roz DE /Volvo l/ML/EPS OXFORD a relatively thin strata of the earth and which may extend rectilinearly over a long plane of distance.

Priority is claimed under Pat. application No. 65/3788 in the Republic of South Africa and accepted for examination by the Registrar of Patents on Oct. 15, I967.

Heretofore the conventional mining of such mineral deposits required the construction of tunnels, and galleries with branching passageways and drifts at different levels, and thereafter drilling, blasting, digging to remove the mineral-bearing ore out of the mine. It

mineral bearing ore, and that in order to gain physical access thereto the excavations must be sufficiently high so to permit entrance of men and machinery, which thereby requires the rubble and nonore-bearing passages. The stope, i.e. the worked-out part of the mine behind the working face, is again filled up with rubble and nonpaying earth, or simply allowed to collapse as the working face be necessary to leave unthereby decreasing the liability ofaccidents to the miners.

Yet another object of the present invention is to provide a new method for the mining relatively narrow strata of ore Yet a further object is to ing of narrow-strata of ore provide a new method for the minwhich in view of the above feature and thus permit the profitable mining oflower concentrates ofore which heretofore could not be profitably mined.

FIG. 2 is an elevational longitudinal section view of a mine incorporating the present invention in its operation.

FIG. 3 is a cross-sectional view in elevation of a section of earth including an ore-bearing strata.

FIG. 4 is a view similar to FIG. 3showing the present invention applied thereto for mining out the ore-bearing strata.

FIG. 5 is a section along a strike taken on line 55 of FIG. 3 and showing initially bored openings for receiving a toothed chain of the present invention.

FIG. 6 is a fragmentary detail of the toothed chain.

FIG. 7 is a longitudinal section view taken on line 77 of FIG. 4.

FIG. 8 is a fragmentary detail of a cutting cylinder.

Referring now to the drawing in detail, the reference numeral 10 represents a mining apparatus according to the present invention wherein there is a chain cutter II that is supported at its opposite ends on mine cars 12 and 13 located in different tunnels or passageways 14 and 15 of a mine 16.

According to the invention, the chain cutter 11 includes a pair of chain-driving gears 17 and 18 between which an endless heavy duty chain 19 is carried. The chain is provided with a plurality of diamond-encrusted links 20 which additionally may incorporate tungsten carbide slugs. The links 20 may be flat cylindrical or of other shape.

A drive mechanism 21 is mounted on each of the cars for selective use, the drive mechanisms including appropriate structure for supporting the gears, and the drive mechanisms being powered by conventional electrical motors with associate controls.

In the ground, the ore-bearing strata may be found to be located in any of various planes due to the geological upheavals and other natural forces that over the ages twist the earth's crust. Accordingly the strata in the mine. may be on a plurality of openings 22 23 between the tunnels or are initially passageways are enjoined enjoined, the

row ram pumps 27.

These ores may then be pulverized and subjected to specific treatments for separation of the valuable minerals from the residue rock.

In FIG. 2, the mine 16 is shown to incorporate a pump column 28 between a pump chamber 29 and a metallurgical plant 30. Pulp stream or slurry 31 flows to the pump chamber 29.

in FIG. 8 a cutting cylinder 32 is shown as a means for grin appropriate driving mechanisms at its opposite ends carried upon the mine carts.

As the mining operation progresses, the space 33 behind the no problems for overhead together.

Thus there has been provided a new method and apparatus for mining of relatively narrow strata of valuable minerals which promotes safety, increases mining profit and permits operation of lower grade ore.

While various changes may be made in the detail construction, it is understood that such changes will be within the spirit and scope of the present invention as is defined by the appended claims.

I claim as follows:

1. Apparatus for mining a relatively narrow ore stratum,

comprising parallel tunnels with carnage rails. a pair of similar

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US733073 *Jan 8, 1901Jul 7, 1903Hubert Valentin NeukirchMeans for cutting coal, &c.
US753092 *Sep 30, 1902Feb 23, 1904 neukirch
US3459169 *Aug 12, 1966Aug 5, 1969Northern Lumber Co IncChain saw for cutting very hard materials and having plunge cutting means
GB599284A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5033795 *Nov 9, 1989Jul 23, 1991The United States Of America As Represented By The Secretary Of The InteriorMethod of mining a mineral deposit seam
US6857706 *Dec 4, 2002Feb 22, 2005Placer Dome Technical Services LimitedMining method for steeply dipping ore bodies
US7192093Apr 22, 2005Mar 20, 2007Placer Dome Technical Services LimitedExcavation apparatus and method
US7695071Oct 15, 2003Apr 13, 2010Minister Of Natural ResourcesAutomated excavation machine
US8016363Dec 29, 2009Sep 13, 2011Eric JacksonAutomated excavation machine
US8646846Oct 14, 2010Feb 11, 2014Steven W. WentworthMethod and apparatus for creating a planar cavern
WO2003050391A2 *Dec 10, 2002Jun 19, 2003Anwyll Edward William DrewMining method for steeply dipping ore bodies
U.S. Classification299/35, 299/18, 299/19
International ClassificationB28D1/12, E21C41/16, B28D1/08, B28D1/02, E21C41/00
Cooperative ClassificationE21C41/16, B28D1/124, B28D1/088
European ClassificationB28D1/08D, B28D1/12C, E21C41/16