A Treatise on Mine-surveying |
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Page xii
... triangles , 2. Method of ordinates , 3. Mechanical method , · • PAGE 103 111 113 116 119 P 120 126 126 • • 127 128 129 130 131 132 · 138 139 · 141 141 141 143 · 145 PAGE 147 148 Produce of coal seams , The calculation xii CONTENTS .
... triangles , 2. Method of ordinates , 3. Mechanical method , · • PAGE 103 111 113 116 119 P 120 126 126 • • 127 128 129 130 131 132 · 138 139 · 141 141 141 143 · 145 PAGE 147 148 Produce of coal seams , The calculation xii CONTENTS .
Page xiii
Bennett H. Brough. PAGE 147 148 Produce of coal seams , The calculation of ore - reserves , CHAPTER XIII LEVELLING . Definitions and principles , The mason's level and boning staves ,. The spirit - level , • ( a . ) The dumpy level , 151 ...
Bennett H. Brough. PAGE 147 148 Produce of coal seams , The calculation of ore - reserves , CHAPTER XIII LEVELLING . Definitions and principles , The mason's level and boning staves ,. The spirit - level , • ( a . ) The dumpy level , 151 ...
Page xiv
... from several levels , 232 The cubical content of a mine - reservoir , 233 Determination of the strike and dip of the line of intersection of two veins , 234 The search for dislocated lodes , Irregularities of seams and xiv CONTENTS .
... from several levels , 232 The cubical content of a mine - reservoir , 233 Determination of the strike and dip of the line of intersection of two veins , 234 The search for dislocated lodes , Irregularities of seams and xiv CONTENTS .
Page xv
Bennett H. Brough. The search for dislocated lodes , Irregularities of seams and beds , Subsidence and draw caused by working coal , CHAPTER XVIII . MINE PLANS . Plan and section , ( a . ) Metalliferous mines , ( b . ) Colliery plans ...
Bennett H. Brough. The search for dislocated lodes , Irregularities of seams and beds , Subsidence and draw caused by working coal , CHAPTER XVIII . MINE PLANS . Plan and section , ( a . ) Metalliferous mines , ( b . ) Colliery plans ...
Page 5
... seams , and irregular deposits , including masses , stock- works , and pockets . Tabular deposits are those in which two dimensions predominate . The third smaller dimension , the per- pendicular distance between the two bounding planes ...
... seams , and irregular deposits , including masses , stock- works , and pockets . Tabular deposits are those in which two dimensions predominate . The third smaller dimension , the per- pendicular distance between the two bounding planes ...
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Common terms and phrases
accuracy accurate adjusted back-sight base-line bearing bore-hole brass calculated centre chain City Guilds clamped clinometer coal colliery collimation coloured compass contour lines cord corner cosec cotan cross-wires curve determined direction distance employed equal error fathoms feet fixed fore-sight glass graduated ground height hole horizontal circle inches inches in diameter inclination instrument intersection latitude length line of sight lode magnetic bearing magnetic meridian magnetic-needle marked means measured method metres mine-surveying miner's dial mines needle observations obtained offsets Ordnance Survey parallel parallel ruler perpendicular placed plane planimeter plate plotting plumb-bob plumb-line plummet position protractor represents right angles safety-lamp scale seam shaft side spirit-level square staff station station-line strike and dip surface surface-surveys survey tacheometer tacheometry tangent screw telescope theodolite transit-theodolite traverse triangle tripod tube underground vernier vernier-plate vertical angles wire yards
Popular passages
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