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Open-pit coal mine double-pit dynamic stripping ratio adjusting method

An adjustment method and open-pit coal mine technology, which is applied in open-pit mining, earthwork drilling, special mining, etc., can solve problems such as changes in the stripping ratio and the inability to effectively strip and adjust the advanced stripping method, and achieve large adjustment capabilities, The effect of wide application value and flexible adjustment mode

Inactive Publication Date: 2015-03-11
赵红泽 +1
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  • Abstract
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Problems solved by technology

[0003] 1. The purpose of the invention: the present invention will solve the problem of how to solve the problem that under complex geological conditions, the inclined coal seam or the coal seam is turned from nearly horizontal to inclined, the stripping ratio changes sharply, and the traditional advanced stripping method cannot effectively strip and adjust the coal seam. Problems of Adjustment and Control of Production Stripping Ratio

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  • Open-pit coal mine double-pit dynamic stripping ratio adjusting method
  • Open-pit coal mine double-pit dynamic stripping ratio adjusting method
  • Open-pit coal mine double-pit dynamic stripping ratio adjusting method

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Embodiment Construction

[0014] According to the geological conditions and mining conditions of each open-pit coal mine, different adjustment modes in the present invention are selected. For near-horizontal and inclined coal seams, the adjustment mode of the original mining pit and the advanced pit is generally used, and the trench is deepened in the area with a relatively high stripping ratio in the advancing direction to open up a new advanced stripping stope. Such as figure 1 (a). This mode also includes two modes, such as figure 2 shown. figure 2 Among them, D is the mining depth of the open-pit mine, m; OD is the depth of the coal seam drop, m; H is the distance from the bottom of the advanced stripping pit to the roof of the coal seam, m; β is the working slope angle of the original mining pit, (°); is the side slope angle at the end of the advanced stripping pit, (°); C is the surface distance between the two pits, m; v 1 Propelling speed for the original mining pit, m / a; v 2 Propelling ...

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Abstract

The invention provides an open-pit coal mine double-pit dynamic stripping ratio adjusting method and belongs to the technical field of mining industry. The invention mainly solves a problem of adjusting and controlling a stripping ratio under a situation that a conventional adjusting method is not available for carrying out effective stripping adjustment since an inclined seam or a seam is turned from an approximately horizontal situation into an inclined situation and the stripping ratio is changed sharply under a complicated geological condition. The adjusting method comprises two adjust modes: a mode of an original mining pit and an advanced pit and a mode of the original mining pit and an auxiliary mining pit, wherein the mode of the original mining pit and the advanced pit includes an A method and a B method. A main technical scheme includes following steps: developing an advanced stripping stope through a groove-forming deepening operation, performing deepening and an advancing operation in the stripping stope, and combining the original mining pit and the advanced stripping pit until a new working pit edge is formed. To the open-pit coal mine in which an inclined seam and an approximately horizontal seam being turned into the inclined seam, the double-pit dynamic stripping ratio adjusting method can effectively balancing the production stripping ratio, can ensure a stable production yield and can increase economic benefit of a mine.

Description

technical field [0001] The invention belongs to the technical field of mining and relates to a method for adjusting the stripping ratio of open-pit coal mines. Background technique [0002] Under the condition that the ore production capacity of the open-pit mine remains unchanged, the number of equipped equipment, the number of personnel and the scale of infrastructure are largely determined by the production stripping ratio during the flood peak period. Therefore, in order to maintain the stability of production capacity and equipment quantity, open-pit mines often balance the stripping ratio within a period of time, and use the optimization of mining procedures to adjust and stabilize the production stripping ratio. The traditional method of adjusting the production stripping ratio is realized by changing the mining program and mining parameters, including adjusting the mutual position between the steps, the width of the flat plate, the length of the opening ditch, the ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C47/02
CPCE21C47/02
Inventor 赵红泽张瑞新
Owner 赵红泽
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