HOISTS AND WINDERS
4-rope hoisting machine with direct AC synchronous drive . The investment is of key importance for improving the ventilation and climate conditions for miners and shortening the access routes for crews to the working faces .
OLKO presses ahead in Olfen
Since 2012 OLKO-Maschinentechnik GmbH has been part of the Thyssen-Schachtbau GmbH family and successfully realised numerous underground mining projects all over the world . OLKO concentrates its activities on the development , engineering , manufacturing , commissioning and service of shaft hoisting technology for vertical hoisting of raw materials . From its brand new headquarters in Olfen , Germany , OLKO is supplying individual machines and equipment for vertical shaft hoisting as well as material transportation systems . Benefitting from a global Thyssen network , customers attest OLKO a global competence and experience in shaft hoisting technology and material transportation .
OLKO ’ s company philosophy is based on design and manufacturing ‘ Made in Germany ’ and it told IM it is proud that practically all of the products are exclusively manufactured by OLKO itself or with its longstanding partners in Germany .
OLKO recently has been awarded a contract to engineer , produce , supply and commission two double-drum winders and rope sheaves by one of the largest steelmaking and mining companies worldwide for their operation in Kazakhstan . For OLKO , this is the first project to be realised in Kazakhstan and OLKO is glad that its winders are part of one of the Kazakhstan ’ s largest mining projects . Both winders will be used at two different underground coal mines . The mines produce primarily metallurgical coal , used for steelmaking and therefore shipped to a nearby steel production facility .
In the first stage of the project , OLKO is to supply a double-drum winder for the service shaft . At a later stage , the second double-drum winder will be supplied for the ventilation shaft of . Shaft depths are approximately 813 m and 564 m . The winders are designed for one rope layer , thus effects that the service shaft doubledrum winder has a coiling width of 3.15 m and a diameter of 7.07 m . Additionally , to ensure the availability of the winder , the customer insisted on a special drive design using a gearbox with two inputs and one output . In the unlikely event that one of the two motors has a malfunction , the winder can still be operated with approximately two thirds of its performance using the second motor .
Both winders are equipped with the wellknown and most modern multi-channel braking system , type COBRA-01 . In case of an emergency the COBRA-01 enables deceleration of the winder with a constant retardation that can be adjusted to the corresponding local mining regulations . The design of the COBRA-01 braking system is such that each channel is hydraulically and electrically 100 % redundant and replaceable . In the event of safety braking and failure of one brake circuit , the remaining brake circuits take over the full functionality of the brake without falling below the countryspecific limit values . IM
AUGUST 2023 | International Mining 37