Reinforcement of the mine shafts
REINFORCEMENT OF THE MINE SHAFTS (EN: mine shaft reinforcement; DE: Einbauen der Schachteinbauten, FR: amenagement des puits, equipement des puits; ES: equipamiento de pozos; RU: армирование шахтных стволов) is the installation within the shaft of the structures (buntons and guides), which are facilitating the movement of the lifting conveyance vessels; it also includes the construction of the ladders, and the laying of the engineering communications.
There is used mostly metallic reinforcement, or wooden and combined one during the inflow of the aggressive waters into the mine (for example, within the potash mines). The buntons (horizontal girders, which are fixated into the lining of the shaft) serve for the fixation of the guides (so called main buntons), and also for the installation of the ladders, fixation of the drainage installations, pipes for the compressed air, and so on (auxiliary buntons). They manufacture the guides, which are facilitating the directional movement of the lifting conveyance vessel, of the metal, wood, rope (so called flexible reinforcement). They install the tiers of the metallic buntons (the interval of the reinforcement) along the vertical depending on the performance of the lift and on the type of the guides, which are used, at the distance: 3.125 and 4.167 metres for the rail guides, 3 and 4 metres for the c-box shaped. They fixate the guides to the buntons with the help of the special steel clamps. They diminish the wear of the guides, reducing the loads onto the reinforcement, with the installation of the sprung rubber coated rollers with the diameter of up to 410 millimetre onto the lifting conveyance vessels, and also by the method of manufacturing of the guides and rollers of the steels of the identical marks.
The reinforcement of the mine shafts is performed, as a rule, according to the sequential scheme, namely, the installation of the buntons with the help of the hanging sinking platform from the top down to the bottom (through the entire length of the shaft), with the following hanging of the guides onto the buntons, with the help of the special lifting cradles, from the bottom up to the top. They perform the descent of the main buntons into the shaft on the hook of the lifting rope, of the auxiliary ones within the wide buckets. They install the ends of the buntons into the holes within the lining of the shaft, and they pour the fixating concrete into these holes. At the same time as the installation of the buntons, they equip the ladder compartment, they mount the water outflow pipes and other engineering communications. After the installation of the buntons, they dismantle the hanging sinking platform, and start to hang the guides (in pairs) onto the buntons from the bottom up. They install the guide, which is hunging on the hook of the lifting rope (Figure), onto the end of the one, that has been installed earlier, they temporarily fixate it with the steel clamps, and, after the verification of the verticality and distance between the paired guides, they tighten the clamps. During the parallel scheme of the reinforcement of the mine shafts, they install the buntons and guides simultaneously, with the help of the two-level sinking platform, along the direction from the top down to the bottom. At the bottom platform, they make the holes into the lining of the shaft, at the top one they install the buntons and guides, and equip the ladder compartment.
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