Open-pit mine mining and discharging method contributing to reclaiming of inner dumping site

Abstract

The invention discloses an open-pit mine mining and discharging method contributing to reclaiming of an inner dumping site. The open-pit mine mining and discharging method mainly aims to overcome thedefects that unreasonable treatment of surface layer soil is conducted, and to-be-reclaimed soil is compacted due to repeated rolling compaction of the dumping site existing in the mining and discharging technology at the present stage. The open-pit mine mining and discharging method mainly comprises the steps that advance stripping of the one-year advancing distance is conducted on the uppermostlayer of humus of an upper rock covering layer of a coal bed in advance in fall of the first year, and overburden materials are discharged and abandoned to the uppermost layer of the inner dumping site; flood irrigation is adopted when frozen earth occurs in winter, and an originally compacted land is loosened by utilizing a frost melting phenomenon; rock below the surface layer humus soil is onlystripped from the beginning of spring of the second year, and steps are stripped according to a synchronous or approximately synchronous mode; and stripping work of the lower layer of overburden materials is continued to the end of summer, then the processes in the fall of the first year are conducted again, and primary circulation is from the fall of the first year to the fall of the second year. According to the open-pit mine mining and discharging method, the problems of upper covered rock and soil mixing, secondary mining and discharging, artificial farming and the like are solved, the mining and discharging and reclaiming cost are reduced, and open-pit mine reclaiming is facilitated.

Description

technical field [0001] The invention relates to a mining and discharging sequence of the overlying rock and soil in an open-pit mine in northern China, and is especially suitable for open-pit mining areas in arid areas where the surface soil humus layer is shallow, the ecology is fragile, the winter time is long, the freeze-thaw phenomenon is obvious, and seasonal mining and discharging operations are adopted. , belonging to the field of mining. Background technique [0002] The cost of open-pit mining is low and the economic benefits are obvious. However, at present, the overlying rock and soil in open-pit mines adopt a synchronous mining and drainage method, that is, the overlying rock and soil are divided into several steps according to a certain height, and each step moves forward synchronously or nearly synchronously when stripping and discharging. Propelling, resulting in the humus soil layer most suitable for plant growth in the uppermost layer or the rock soil in the...

AI Technical Summary

Problems solved by technology

Although this solves the problem of nutrient deficiency in the topsoil to a certain extent, there are problems such as serious loss of topsoil in the process of stockpiling and unsatisfactory loosening effect of artificial cultivation, which has caused a substantial increase in the cost of mining, drainage and reclamation operations

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