Ore Mining Methods

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Author: Walter Richard Crane

Publisher:

ISBN: STANFORD:36105032235355

Category: Mining engineering

Page: 277

View: 863

Ore Mining Methods Comprising Descriptions of Methods of Support in Extraction of Ore Detailed Descriptions of Methods of Stoping and Mining in Narr

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1910 edition.

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Author: Walter Richard Crane

Publisher: Theclassics.Us

ISBN: 1230347305

Category:

Page: 58

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1910 edition. Excerpt: ...level of the tops of the subs, and is commonly known as 'stripping.' Consider that the work of stripping has reached the point shown in the longitudinal section, Fig. 43. By knocking down the supporting posts, as shown at the left of the first sub, the back of ore will fall and can be shoveled up and hauled away to the chutes. The settlement of the broken rock above is controlled by the mat of timbers which is constantly being added to by the timbers in the subs that are lost and broken. The method of cutting-out the pillars is shown in the plan, Fig. 43, as at the left where the stubs of pillars are being removed, the back standing on posts. As a sub cannot be worked beneath others not yet removed, it is necessary to either entirely remove the upper sub before beginning work on a lower one, or to carry on the stripping in descending order, each sub being carried some distance in advance of the one below. As soon as the stripping operation reaches a main level that level is abandoned and all communication with the subs below must be through the lower level. The usual practice is to have one level or lift (the block of ore between levels) in the process of stripping; the next lower subdrifting, while the third lift below is being opened up by cross-cuts. The ore will also have to be run through the chutes from the upper to the lower sub. In order to facilitate the handling of timber it is brought in from the upper level and lowered to the respective subs instead of being raised as in the top-slice method. Light but close timbering is the rule and by careful work the caving ground can be controlled with little or no danger of crushes and loss of ore. The work of mining by the sub-drift method as described is for comparatively hard and...

Ore Mining Methods

About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work.

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Author: Walter R. Crane

Publisher: Forgotten Books

ISBN: 0266262627

Category: Technology & Engineering

Page: 292

View: 471

Excerpt from Ore Mining Methods: Comprising Descriptions of Methods of Support in Extraction or Ore, Detailed Descriptions of Methods of Stoping and Mining in Narrow and Wide Veins and Bedded and Massive Deposits Including Stull and Square-Set Mining, Filling and Caving Methods, Open-Cut Methods Of mining and support of workings are so closely related that the discussion Of one necessitates a more or less detailed treatment Of the other. It therefore seems eminently proper and even necessary to preface a work of this character with a brief discussion regarding the elements of support. A description Of the elemental units of support, such as pillars, props, cribs, stulls and square sets will not therefore be out Of place in this connection. Further, the use Of filling is considered, as it is rapidly becoming an important factor in the support Of under ground excavations; caving as a factor in support is also discussed. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Ore Mining Methods

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Author: Walter Richard Crane

Publisher:

ISBN: WISC:89083900951

Category: Mining engineering

Page: 219

View: 511

Ore Mining Methods Comprising Descriptions of Methods of Support in Extraction of Ore Detailed Descriptions of Methods of Development of Mines of S

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Author: Crane Walter R (Walter Richard) 1870

Publisher: Hardpress Publishing

ISBN: 1314291254

Category:

Page: 306

View: 171

Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.

Ore Mining Methods

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.

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Author: Walter Richard Crane

Publisher: Palala Press

ISBN: 1358407436

Category:

Page:

View: 968

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

ORE MINING METHODS COMPRISING

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Author: Walter R. (Walter Richard) B. 18 Crane

Publisher: Wentworth Press

ISBN: 1371371369

Category: History

Page: 300

View: 931

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Ore Mining Methods

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.

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Author: Walter Richard Crane

Publisher: Palala Press

ISBN: 1358327823

Category:

Page:

View: 266

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

ORE MINING METHODS COMPRISING

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.

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Author: Walter R. (Walter Richard) B. 18 Crane

Publisher: Wentworth Press

ISBN: 1374251372

Category: History

Page: 240

View: 249

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Ore Mining Methods Comprising Descriptions of Methods of Support in Extraction of Ore Detailed Descriptions of Methods of Stoping and Mi

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.

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Author: Walter Richard Crane

Publisher: Palala Press

ISBN: 1377669351

Category: History

Page: 234

View: 586

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Ore Mining Methods Comprising Descriptions of Methods of Support in Extraction of Ore Detailed Descriptions of Methods of Development of Mines of Stoping and Mining in Narrow and Wide Veins and Bedded and Massive Deposits Including Stull and Square Set

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.

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Author: Walter R B 1870 Crane

Publisher: Palala Press

ISBN: 1347329005

Category:

Page: 300

View: 255

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Underground Mining Methods

Underground Mining Methods: Engineering Fundamentals and International Case Studies presents the latest principles and techniques in use today.

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Author: William A. Hustrulid

Publisher: SME

ISBN: 9780873351935

Category: Technology & Engineering

Page: 718

View: 191

Underground Mining Methods: Engineering Fundamentals and International Case Studies presents the latest principles and techniques in use today. Reflecting the international and diverse nature of the industry, a series of mining case studies is presented covering the commodity range from iron ore to diamonds extracted by operations located in all corners of the world. Industry experts have contributed sections on General Mine Design Considerations; Room-and-Pillar Mining of Hard Rock/Soft Rock; Longwall Mining of Hard Rock; Shrinkage Stoping; Sublevel Stoping; Cut-and-Fill Mining; Sublevel Caving; Panel Caving; Foundations for Design; and Underground Mining Looks to the Future.

Prospecting and Mining of Copper Ore at Santa Rita New Mexico Classic Reprint

About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work.

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Author: Donald F. Macdonald

Publisher: Forgotten Books

ISBN: 0656244305

Category: Technology & Engineering

Page: 154

View: 307

Excerpt from Prospecting and Mining of Copper Ore at Santa Rita, New Mexico It is a far cry from the small and uncertain mining efforts of 50 years ago to the splendidly equipped and solidly financed organiza tions that now handle thousands of tons of ore per day. The old mining was largely speculative; the new is practically on a manu facturing basis. In the' oldidays of mining the aim was, chiefly, to find comparatively rich ore; modern practice looks more toward efficiency in mining and milling, so that vast tonnages of low-grade material may be worked at a profit. The old operators had faith and hoped for good returns; the new ascertain with a fair degree of precision what the available tonnage is, what the cost of mining and treating the ore will be, the time necessary to exhaust the deposit, the capital required, and the net profits to be made. The old mining was financed on a highly speculative basis, and the value of mining stock was largely controlled by the imaginations of the promoters and of the individual holders. In the new regime the financing of mines is often as conservative as the financing of manufactures or railroads, and the value of stock, quoted on the leading exchanges, is controlled by the carefully estimated profits in sight. Of course, with every legitimate industrial enterprise go certain business risks, and mining is not exempted from these. Then, too, valueless mining as well as valueless industrial stocks are sometimes offered for sale by the intentionally dishonest, or the ignorant. However, the prospective purchaser of a mine nowadays, if he is willing to pay for the services of reputable mining engineers, can obtain information on which to base an opinion as to the quality of his investment. The relatively recent development of cheap and efficient methods of mining and of ore dressing has given value to low-grade ore bodies that a few years. Ago were almost valueless. The iron mines of northern Minnesota have been fruitful in developing efficiency in mining methods, notably the open-cut methods in which steam shovels strip off the overburden and then load the ore directly into railroad trains for transport to the furnace. In 1907 open-lcut mining was applied to the low-grade copper ores of Bingham, Utah, with splendid results, and since then it has won a most important place in the min ing of large masses of low-grade ores in several other mining regions, especially at Santa Rita, N. Mex. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.