Ore Mining Methods, Comprising Descriptions Of Methods Of Support In Extraction Of Ore, Detailed Descriptions Of Methods Of Stoping And Mining In Narr

ORE MINING METHODS COMPRISING DESCRIPTIONS OF METHODS OF SUPPORT IN EXTRACTION OF 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, F I L L I N G AND CAVING METHODS, OPEN-CUT WORK AND A DISCUSSION OF COSTS OF STOIING - 1910 - PREFACE - WHILE much has been written with regard to methods of mining ore and many excellent descriptions of the methods employed in the mines of the United States and abroad are to be found in the technical press, yet there is no work in which systematic and detailed descriptions of the various methods are to be found. With this thought in mind the writer has attempted to prepare a work on ore mining methods alone, which it is hoped may prove useful to both the student and the practical man in acquiring a knowledge of ore mining and in comparing methods. That the work may be of the most service, the descriptions have been made brief and many illustrations employed to supplement them. Further, the application of each method has been specifically stated, together with the advantages and disadvantages of its use. The classification of methods followed is based upon size of deposit, rather than kind of mineral or metal and character of deposit, which seems the simplest and most logical method of treatment. The idea has been to describe only those methods which have proven su. ccessfu1 not only in one locality but several, and not to consider proposed methods nor those in the experimental stage. In order to verify descriptions and to study methods more in detail the writer has visited the mines in which practically all of the methods described are employedhowever, personal inspection has been confined to the mines of the United States. Special acknowledgment of suggestions and advice is due to Professors Henry S. RiIunroe and Edwin C. Holden, and the large number of mining men who have extended many courtesies to the writer while collecting the information upon which the work is based. WALTER R. CRANE. THE P ENXSYLVAN S I T A A TE C OLLEGE SCHOOL O F MINES, Jan. I, 1910. - CONTENTS - CHAPTER I Support of Workings Methods of Stoping and Handling Ore in Stopes Mining in Narrow Veins and Bedded Deposits CONTENTS CHAPTER IV Methods of Mining in Wide Veins and Masses PAGE INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 SHRINICAG S E T OPINGM ETHODS O F R INING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 THE G OLD P RINC M E INE A XIMA FO S R KS, C OLORADO T H E ALASKA-TREAD-WELL MISTS, DOUGLA I S S LAN A D L, ASKA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104 SQUARE-SE T JETHOD O S F IIx-. G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104 THE I TIZ ES AT ROSSLAAB R, ITISH COLUMBJA T HE QUEEN A I - E N t II r C x H IG 7 X . . N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I 10 FILLING A ETHODS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IIO THEB ROKEX H ILL R IIATS, N. S. 17. THE HOJEST IELE LEAD, S OUTII D- KOT . . A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I3 I CAVING ATETHODS . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . ...