Research on the working slope steep slope mining plan of Hongshaquan Open-pit Mine
The working slope angle directly affects the stripping amount and production stripping ratio.Increasing the working slope angle can reduce the advance stripping amount,reduce production stripping ratio,save transportation distance and reduce production cost.However,while improving the working slope angle,it is necessary to pay attention to the"two quantities"of the open pit to ensure the continuous and stable production of the open pit.We took Hongshaquan Open-pit Coal Mine as the engineering background to study the relationship between the working slope angle and the changes in advance stripping amount and production stripping ratio.Combining with the actual production conditions on site,the scheme of realizing steep slope mining of working slope was put forward.The results show that when the working slope angle increases by 2°,the advance stripping amount is 4.84 Mm3 lower,and the production stripping ratio is 0.22 m3/t smaller;when the stripping step is combined in pairs,the working slope angle increases to 12°,the production stripping ratio declines to 2.7 m3/t,and the"two quantities"of the open pit is guaranteed.
open pit coal mineadvance strippingworking slopesteep slope miningbench group
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