Open-cast coal mine and mining method thereof

Abstract

The invention discloses open-cast coal mine and a mining method thereof. The open-cast coal mine comprises lead ore and lagging ore which are arranged adjacently, wherein the lead ore comprises a first mining region and a second mining region which are arranged in parallel, the lagging ore comprises a third mining region and a fourth mining region which are arranged in parallel, the inner dump working line of the first mining region is adjacent to the stope mining region of the fourth mining region, the inner dump working line of the second mining region lags the inner dump working line of the first mining region, and the stope working line of the fourth mining region lags the stope working line of the third mining region. By adjusting the stope working line and the inner dump working line of the adjacent ore regions to be in a polygonal line shape, the distance between the lead ore inner dump working line and the lagging ore stope working line at juncture of the adjacent ore regions is increased, and the completeness and smoothness of the end slope transportation line at the juncture of the adjacent ore regions are ensured, so that the transportation equipment is convenient to arrange, the transportation cost is lowered, and the economical benefit and safety of the opencast pit are favorably improved.

Description

technical field [0001] The invention relates to an open-pit coal mine and a mining method thereof. Background technique [0002] Open-pit coalfields have a wide range of occurrences and a large amount of resources. In order to reduce the initial stripping ratio and the amount of infrastructure construction, the coalfield is divided into several minefields for independent mining. Therefore, the open-pit coalfield usually presents a pattern of coexistence of multiple pits. Restricted by factors such as production scale, mining intensity, equipment specifications, and economic benefits, even a single open-pit coal mine will generally divide its mining area into several mining areas for zonal mining on the premise that it is technically feasible and economically reasonable. In the process of mining area boundary and mining area division, if adjacent mining areas advance in parallel in the same direction according to the traditional straight working line layout method, the intern...

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Problems solved by technology

Restricted by factors such as production scale, mining intensity, equipment specifications, and economic benefits, even a single open-pit coal mine will generally divide its mining area into several mining areas for zonal mining on the premise that it is technically feasible and economically reasonable. In the process of mining area boundary and mining area division, if adjacent mining areas advance in parallel in the same direction according to the traditional straight working line layout method, the internal dump formed by the advanced mine mining is very easy to be repeatedly stripped along with the lagging mine recovery As a result, the transportation system cannot be arranged at the junction of adjacent mining areas, which in turn affects the safe and efficient production of the mine. Therefore, considering issues such as mining area turning and production continuity, in order to ensure the sequential mining of mining areas, avoid the simultaneous mining of multiple mining areas. The production organization is chaotic, and it is urgent to adjust the layout of the work line to ensure the smooth transportation of the side rails at the junction and reduce transportation costs

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