A method of intermediate bridge layout for semi-continuous process in open-pit coal mine

Abstract

The invention discloses an arrangement method of a semi-continuous process middle bridge in an open pit coal mine, which is applicable to the open pit coal mine with a deep mining depth and a relatively large inner discharge space. According to the arrangement method, a midpoint of a connecting line between end slopes of two sides of a coal mining step platform is dug down to form a groove; a crushing station is arranged in the groove; a middle bridge is arranged at the pit bottom of the open pit coal mine; the middle bridge comprises an upper layer step and a lower layer step; the upper layerstep is at a same level as the roof of a coal seam; the crushing station is connected with a belt conveyor; a lifting belt conveyor is arranged in an inner dumping site fold line section which is aninner dumping site misplaced position in an open pit mine; one end of the lifting belt conveyor is connected with the belt conveyor at the pit bottom; a contact conveyor is arranged at the ground surface near the inner dumping site fold line section; the other end of the lifting belt conveyor is connected with the contact conveyor; a ground belt conveyor is arranged on the ground surface; and thecontact conveyor is connected with the ground belt conveyor. By adopting the arrangement method, the interaction between a transport truck and a semi-continuous process system is effectively reduced,the mine production stability is improved, and obvious economic benefits are achieved.

Description

technical field [0001] The invention relates to an arrangement mode of intermediate bridges in a semi-continuous process of open-pit coal mines, which is especially suitable for open-pit coal mines with large mining depth and rich internal drainage capacity, and belongs to the field of mining mining technology. Background technique [0002] The semi-continuous process is an open-pit coal mining process between the discontinuous process and the continuous process. This process uses a combination of trucks, crushing stations and belt conveyors. The belt conveyor transport replaces part of the truck transportation. It is flexible, and at the same time has the characteristics of low production cost in continuous process. The intermediate bridge is a transportation road built at the bottom of the open-pit coal mine to connect the internal dump and the stripped working face. The transport trucks transport raw coal and some stripped materials through the intermediate bridge, reduci...

AI Technical Summary

Problems solved by technology

For open-pit coal mines with inner rows, if the system is arranged on a mobile side such as an inner dump or stripping steps, there will be disadvantages of cross-operation between the moving side trucks and the belt conveyor. At the same time, the arrangement of the belt conveyor It will affect the normal advancement of the mobile gang, restrict the stripping or internal drainage of open-pit coal mines, and increase the distance of internal drainage of stripped objects

Therefore, at present, most domestic inner row open-pit coal mines adopt the method of arranging lifting belt conveyors along the side walls, but even so, there are still intersections between the lifting belt conveyors and the side side roads, which seriously affects the transportation of side side trucks and increases the number of stripped objects. At the same time, when the belt conveyor is moved, the lifting belt conveyor cannot move in parallel. It is necessary to remove all the lifting belt conveyor racks and move them to the designated place for re-installation and debugging. The cycle is long and the system stability is poor

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