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, Filling And Cavi
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, Filling And Cavi
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In our eReader you can find the full English version of the book. Read 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, Filling And Cavi Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book 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, Filling And Cavi
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3. Loss of timber is great.
Filling Methods The economic working of the large ore-bodies of the lode of Broken Hill, New South Wales, Australia, has necessi- Digitized by Google MINING IN WIDE VEINS AND MASSES III 7 7 .. ■^' \.
k.
W\ 4l ^ TirrTrn ^ H "^ q rrrJnTTT CO 2i ?! a ^ o bo a c C4 CO tated radical changes in methods of mining until at pres- ent fully three different methods are in use in various parts of the lode. The ore is lead-silver, i. BrokenHUi Mines, although other minerals of ec...onomic value 2. Lead and Silver Ore.
are obtained. The lode ranges in width 3. Vein.
4. Width 35 to from 25 to 370 feet, averaging probably 370 ft 70 or 80 feet, and stands nearly vertically.' The ore varies Digitized by VjOOQIC 112 ORE MINING METHODS from very hard to very friable, the wall-rock also varying somewhat in hardness and strength. These conditions are also responsible for changes in methods, as well as for the employment of various methods in the different mines of the district* The tendency has been to employ methods in which the quantity of timber used is small and is be- coming of less importance as a factor in the extraction of ore.
What to read after 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, Filling And Cavi?
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To quickly assess the difficulty of the text, read a short excerpt:
3. Loss of timber is great.
Filling Methods The economic working of the large ore-bodies of the lode of Broken Hill, New South Wales, Australia, has necessi- Digitized by Google MINING IN WIDE VEINS AND MASSES III 7 7 .. ■^' \.
k.
W\ 4l ^ TirrTrn ^ H "^ q rrrJnTTT CO 2i ?! a ^ o bo a c C4 CO tated radical changes in methods of mining until at pres- ent fully three different methods are in use in various parts of the lode. The ore is lead-silver, i. BrokenHUi Mines, although other minerals of ec...onomic value 2. Lead and Silver Ore.
are obtained. The lode ranges in width 3. Vein.
4. Width 35 to from 25 to 370 feet, averaging probably 370 ft 70 or 80 feet, and stands nearly vertically.' The ore varies Digitized by VjOOQIC 112 ORE MINING METHODS from very hard to very friable, the wall-rock also varying somewhat in hardness and strength. These conditions are also responsible for changes in methods, as well as for the employment of various methods in the different mines of the district* The tendency has been to employ methods in which the quantity of timber used is small and is be- coming of less importance as a factor in the extraction of ore.
What to read after 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, Filling And Cavi?
You can find similar books in the "Read Also" column, or choose other free books by Crane, Walter R. (Walter Richard), B. 1870 to read onlineMoreLess
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