Reserve coal quantity reserving method for strip mine with inclined coal seam

Abstract

The invention belongs to the technical field of strip mine mining, and provides a reserve coal quantity reserving method for a strip mine with an inclined coal seam. The reserve coal quantity reserving method comprises the steps that in the coal mining operation process, folded reserve coal quantity reserving areas are reserved, the reserve coal quantity reserving areas are arranged at the position, close to end slopes, of a coal seam bottom plate, the reserve coal quantity reserving areas comprise first vertical sections arranged on the end slopes and horizontal sections arranged on the coal seam bottom plate, according to the coal mining quantity of the strip mine, morphological parameters of the folded reserve coal quantity reserving areas are confirmed, and according to the morphological parameters of the reserve coal quantity reserving areas, the reserve coal quantity reserving areas are sequentially reserved at the positions, close to the end slopes, of the coal seam bottom plate from bottom to top to complete the space reserving work of the reserve coal quantity reserving areas; and during the unfavorable stripping time of the coal seam of the strip mine, advancing of stopes is paused, coal mining operation is transferred to the positions of the reserve coal quantity reserving areas, and mining operation of the coal mining quantity of the reserve coal quantity reserving areas is carried out. According to the reserve coal quantity reserving method for the strip mine with the inclined coal seam, the reserve coal quantity reserving areas are arranged at the positions, close to the end slopes, of the coal seam bottom plate so that the advanced advancing distance of the stopes can be reduced, and the inner dumping transportation distance is reduced.

Description

technical field [0001] The application belongs to the technical field of open-pit mining, and in particular relates to a method for setting up secondary quantities in inclined coal seam open-pit mines. Background technique [0002] In the production process of open-pit mines, in order to ensure that the mining work is connected with each other in time and space, and to avoid production interruption due to insufficient rock stripping and lagging trench digging, etc., a reserve coal volume is set to ensure that when accidents occur in the development and preparation projects It can still maintain normal coal output for a period of time. Traditionally, this part of the reserve coal volume is called "second volume". [0003] At present, most of the open-pit coal mines in my country are composite coal seam open-pit mines, mainly distributed in northern regions such as Inner Mongolia, Shanxi, and Xinjiang. Operation, that is, the stripping works are concentrated in summer and autu...

AI Technical Summary

Problems solved by technology

This is mainly reflected in two aspects: First, the excessive amount of coal reserves causes a large amount of stripping in advance in the open-pit mine, which leads to a larger tracking distance between the stripping steps of the open-pit mine and the inner dump 4, and increases the stripping material in the end-side transportation channel. The second is that the excessive amount of coal reserves reduces the disposal space of the dump in the open-pit mine and increases the pressure of the dump.

[0008] 2. Occupation of funds

Excessive reserves of coal mean that the capital of the open pit mine is invested in advance, which reduces the disposable capital flow of the open pit mine and affects the normal production of the open pit mine

[0009] 3. Affect coal quality

Excessive reserves of coal make some raw coal exposed for too long, the influence of external weather and the oxidation of the coal seam itself will have a certain impact on the coal quality of the open-pit mine, and may even cause spontaneous combustion, thus affecting the economic benefits of the open-pit mine

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