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18 inches Bates county bed of coal bituminous bottom Broadhead Carbon Center Character of coal Clair county coal bed coal deposits Coal Measure rocks Coal Measure strata Coal Measures coal mines coal pits coal producer creek deep depth Diagram illustrating distribution drab drift drill hole entries feet thick Fire clay fissile following section Geological Survey hard Henry county Higginsville hole was put Huntsville inches thick Kansas City Lafayette county Lamar Limestone located long wall method lower bed Lower Carboniferous Macon county margin method of mining miles south miles west Moundville northwestern occur occurrences of coal overlying pillar and room points portion probably PRODUCTION IN 1891 prosecuted pyrite pyritiferous railway Randolph county Ray county record Rich Hill river room method Saline county sandstone seams Section of Coal section was measured Shale slack readily stripping struck sunk surface Tebo TONS town upper bed Vernon county vicinity
Popular passages
Page 5 - Major, and the Members of the Board of Managers of the Bureau of Geology and Mines: Gentlemen...
Page 175 - ... entry, one on the right and one on the left, each at an angle of 45° with the original direction of the main entry. In the angle between these two new entries a triangular packwall is built, as a permanent pillar, and beyond it the mining of the coal continues as before. When this has proceeded to such a distance that the haul along the face of the coal to the entries again becomes excessive, bifurcation (dividing into two prongs or forks) of the entries is again resorted to. The process continues...
Page 176 - ... before. When this has proceeded to such a distance that the haul along the face of the coal to the entries again becomes excessive, bifurcation (dividing into two prongs or forks) of the entries is again resorted to. The process continues until the limits of the property are reached, unless the coal is at such a shallow depth that it is more economical to sink new shafts than to have a long underground haul. Part of the shaft s is used as the downcast airway, and as FIG.
Page 50 - ... time ; but the work will proceed slowly and the returns will come in gradually from year to year. Thus, if a man own a property of forty acres, of which, according to our calculation, the net value of the coal is $16,000, and if he does not receive any of this $16,000 until the expiration of fifteen years, then the present value of his land is a sum, which, at compound interest at current rates, will amount to $16,000 in fifteen years; this at 6 per cent, interest will be about $6,700.
Page 175 - ... roads crosscuts are then driven, connecting them with each other. From the exterior sides of these cross-cuts the coal is now mined radially from the shaft, the main entries advancing with the face and being kept open by packwalls and gobbing. This process continues until the face has advanced about 800 feet, and until the distance between the ends of each two adjacent entries is about 1,200 feet. When this stage is reached, the face is still pushed forwards in the same direction as before, but,...
Page 175 - ... stage is reached, the face is still pushed forwards in the same direction as before, but, instead of one entry being left open and packwalls built, two are now left, which radiate from the main entry, one on the right and one on the left, each at an angle of 45° with the original direction of the main entry. In the angle between these two new entries a triangular packwall is built, as a permanent pillar, and beyond it the mining of the coal continues as before. When this has proceeded to such...
Page 24 - Thus, along its margin, the Coal Measure formation may be considered to taper to a feather edge, while in the extreme northwestern corner of the State, it has an aggregate thickness of nearly 2,000 feet and consists of more than 200 strata.
Page 118 - ... Outcroppings of other beds occur at numerous localities where the coal is too thin to be profitably worked; at some places, notably above Waverly, such coal is reported to have been dug into of considerable thickness, but the developments are not sufficient for one to predict the extent of the bed. Again, at other localities, deep drill holes have been put down in which thick coal beds are reported to have been struck; but the results from such deep drillings at different places are conflicting,...