Rising mine working
RISING MINE WORKING (EN: raise; DE: schwebender Grubenbau, Aufhauen; FR: montage, montee, cheminee; ES: chimenea; RU: восстающая горная выработка) is the vertical or steeply inclined mine working, which does not have the immediate exit onto the Earth's surface, and which is serving for the bypassing of the useful minerals or waste rock, for the delivery of the stowing and other materials from one horizon onto another horizon, for the movement of the people, for the ventilation, for the laying of the pipelines and electric cables, and also for the exploratory purposes. At the underground ore mines, the rising mine working is called as the raise, while at the underground coal mines, the rising mine working is callsed as the winze.
Depending on the purpose, they conduct the rising mine workings through the useful minerals or through the waste rocks, and they equip these mine workings with one, two, or three compartments (for the useful minerals, waste rock, ladder passageways, and so on). The total sizes of the rising mine workings are: with the two compartments, 2.7x1.26 metres, 3x2 metres; with the three compartments, 3.6x1.6 metres, 4x2 metres. The shoring is of the strut type, of the log shell type, the continuous of the log row type, and the so-called on the dibs. In all these cases, the ore-chute compartment is separated using the wooden planks. The conducting of the rising mine working is performed using the drilling-blasting or machine (drilling) methods. The drilling-blasting method with the usage of the extendable ladders, of the temporary stepping platforms, and of the shields, is used during the penetration of the rising mine working with the height of up to 40 metres within the stable rocks with the less than medium strength, which are requiring the construction of the shoring, and the construction of the special compartments.
They perform the conducting of the rising mine working with the height of more than 40 metres within the stable rocks with the help of the self-propelled platforms. The variant with the hanging cage is used during the penetration of the rising mine working with the height of 40-80 metres, with the angle of inclination of at least 80-85 degrees. The technological scheme includes the conducting of the leading borehole up to the upper horizon. They distinguish the blasthole penetration of the rising mine working, and also the penetration with the usage of the deep boreholes. In the second case, they drill the boreholes through the complete height of the rising mine working, and then they blast it from the bottom up using the individual stopes with the sizes of 2-4 metres. Within the central part of the stope, there exist one or several boreholes for the rock-cutting and auxiliary charges; the auxiliary boreholes are situated at the distances of 10-15 diameters from the rock-cutting boreholes. They determine the quantity and situation for the delineating boreholes depending on the cross-section of the mine working. The drilling of the rising mine working (within the rocks with f = 4-6) includes the penetration of the leading borehole, with the subsequent widening drilling of this borehole along the opposite direction with the help of the widener.
The speed of the conducting of the rising mine working depends on the mining-technical conditions, on the cross-section of the mine working, and on the equipment, which is used. In case of the usage of the self-propelled platforms (the cross-section of the mine working is 1.5-10 square metres), the speed reaches 120 metres per month, while in case of the drilling of the mine workings with the equal cross-sections, the speed reaches up to 200 metres per month.
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