A mining method for inclined coal seam open-pit mining with deep horizontal mining and shallow longitudinal mining

Abstract

An inclined seam strip mine mining method achieving deep transverse mining and shallow longitudinal mining comprises the following steps that (1) the transverse mining and longitudinal mining boundarydepth h is confirmed according to technical parameters confirmed by a strip mine; (2) mining is carried out in a transverse mining manner at the early stage of strip mine construction, and transversemining is started after the propulsion direction is confirmed; (3) after mining is carried out according to the step (2) to the pit bottom, after the longitudinal mining conditions are met at the level of the depth h or above, and the original transverse mining manner is charged into the longitudinal mining manner at the level of the depth h or above of the strip mine; (4) after the strip mine meets the conditions of shallow longitudinal mining and deep transverse mining, deep transverse mining and shallow longitudinal mining are carried out at the same time; (5) shallow longitudinal mining continues to be pushed towards the final state direction, deep transverse mining continues to follow up, and the steps (2)-(4) are circulated; and (6) after shallow longitudinal mining is pushed to thefinal state, deep transverse mining continues to mine a deep coal layer till all coal in the state is mined. According to the method, secondary reserving is simple, the stripping ratio of early-stageproduction is small, and the comprehensive stripping distance is small.

Description

technical field [0001] The invention belongs to the technical field of open-pit mining, and in particular relates to a mining method for an inclined coal seam open-pit mining with deep horizontal mining and shallow vertical mining. Background technique [0002] When mining an inclined ore body in the open-pit mining process, the covering on the surface of the ore body is first stripped, and when the mining work reaches the final depth, the inner row of the goaf is carried out. The layout of the working line There are mainly two layout methods: layout along the strike of the ore body and layout vertical to the strike of the ore body. During specific mining, the strike and tendency of the ore body, geological and topographical conditions, production capacity, transportation methods, infrastructure stripping volume and production stripping ratio should be considered. Among them, the relationship between stripping and mining is more important to the entire mining cycle of open-p...

AI Technical Summary

Problems solved by technology

However, longitudinal mining also has corresponding disadvantages: under certain mine technical conditions, the haul distance inside the ore body is relatively large; the opening ditch is arranged in the footwall of the ore body, and when the working line advances from the footwall to the upper wall, it is difficult to classify ore rocks , the ore loss and dilution are relatively large, and the amount of infrastructure stripped rock is also large

However, horizontal mining also has corresponding disadvantages: there are many mining steps, and the mining equipment is frequently moved up and down. stripping disorder

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