Continuous stripping process for open pit coal mine under loess loess loess landform

Abstract

The invention relates to the technical field of open-pit coal mining, in particular to a continuous stripping process for an open-pit coal mine under loess loess loess loess landform, which comprises the following steps of: 1, performing a continuous stripping process on loess at the upper part of a working side of the open-pit coal mine by adopting a wheel bucket excavator; 2, the wheel bucket excavator moves the excavation belt in the opposite direction after mining is finished; when the wheel bucket excavator excavates the loess piled up by the upper truck, the loess loess of the loess loess loess hills is piled up to the mined-out side of the wheel bucket excavator at the moment by the upper truck; and 3, the step 2 is repeated till all the loess on the upper portion of the wheel bucket excavator is discharged to the dumping site. The characteristics of a wheel bucket excavator continuous mining technology and a single bucket excavator-truck intermittent mining technology are combined, the transportation distance of a truck is reduced, the transportation cost of stripped objects and carbon emission concentration equipment in the transportation process are reduced, the efficiency is improved for cleaning loess loess loess hills, and meanwhile fuel consumption and carbon emission are reduced.

Description

technical field [0001] The invention relates to the technical field of open-pit coal mining, in particular to a continuous stripping process for open-pit coal mines under the loess mao landform. Background technique [0002] The production capacity of open-pit coal mines in China is about 950 million tons, accounting for 18.6% of the national coal mine capacity. The production capacity of Jungar and Pingshuo mining areas in the border area of ​​Shaanxi, Shanxi and Mongolia can reach more than 200 million tons per year. The topsoil of some open-pit coal mines is stripped by bucket excavators. When the surface is not undulating, there will be a whole platform of steps, which is operated by a single bucket excavator. The level of the bucket excavator is the main mining step. During the propulsion process, if the loess arched to form the loess mao, the whole platform above the main mining bench increased, and the original single bucket excavator needed to be frequently relocated...

AI Technical Summary

Problems solved by technology

In the process of advancing, if the loess arches and forms loess mounds, the upper part of the main mining platform will increase, and the original single-bucket excavator needs to be frequently relocated, which seriously affects the efficiency of the working gang.

At the same time, due to the increase in the amount of stripped loess and the increase in the number of trucks, the fuel consumption of the mine has increased and the carbon emissions have increased significantly

[0003] How to make full use of the continuous mining process of bucket wheel excavators, which has high production efficiency, electricity instead of oil, difficult system relocation, and poor adaptability, and the single bucket excavator-truck intermittent mining process is mobile, flexible, large in carbon emissions, and adaptable Strong characteristics, adjusting the number of equipment and mining methods to reduce fuel consumption and carbon emissions has always been an important issue for open-pit coal mines that adopt the continuous mining process of bucket wheel excavators

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