Optimization Of End Road Width Based On Vehicle Flow Density Research In Haerwusu Open-pit Coal Mine

The coal seams of large-scale open-pit coal mines in China are mostly composite coal seams.Due to the limitation of mining technology,a large amount of coal resources can not be produced by the end-slope pressure,resulting in waste of resources.The recovery of coal under the end of the coal has a huge impact on the exploitation of coal resources and the economic benefits of the mining area.At the same time,the stability of the end slope and the transportation of the end material are also changed by mined the coal under end-slope.In this paper,the Haerwusu open-pit mine is taken as the research background.Under the premise of satisfying the stability of the end-slope slope of the Haerwusu open-pit mine,the lower-end gangs with different widths are proposed.Whether the traffic capacity of the transport road meets the traffic density as a constraint condition for mining.The VISSIM simulation software is used to simulate the traffic density of each step under the width of different end roads.It is concluded that the lowermost step is changed to a one-way street and has certain economic benefits.Under the condition of satisfying the stability of the slope,propose the scheme that the bottom step is completely relied on.Because the bottom of the lower step is completely against,the traffic density of the upper horizontal end road is close to the road traffic capacity and resulting in transportation safety hazards.Therefore,the middle bridge plan is proposed to play the role of the opposite side.Under the premise of ensuring the stability of the intermediate bridge,the elevation of the intermediate bridge plays a role in the diversion of the opposite side and improves the transportation efficiency.Comparing the economic benefits under the intermediate bridges at different heights,the best bottom-end roads are optimized.There are 45 figures,9tables and 70 references in this thesis.