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Dynamic coal discharging method for fully mechanized top-coal caving mining

A fully mechanized caving and dynamic technology, applied in surface mining, earthwork drilling, underground mining, etc., can solve the problems of low top coal recovery rate, top coal loss, incompatibility with the efficient and high recovery rate development of coal resources, etc. Mixed gangue rate, improve coal output efficiency, avoid the effect of repeated disturbance

Active Publication Date: 2019-05-24
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the face of new technical requirements, due to the repeated disturbance of the coal-rock interface in the existing fully mechanized caving mining technology, the gangue in the goaf is easily mixed into the bulk coal flow early, and often occurs in field operations. The premature closure of the coal slab leads to a low recovery rate of the top coal, resulting in a large loss of top coal. This situation is not in line with the purpose of high-efficiency and high-recovery development of coal resources in my country.

Method used

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  • Dynamic coal discharging method for fully mechanized top-coal caving mining
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  • Dynamic coal discharging method for fully mechanized top-coal caving mining

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Embodiment 1

[0025] Such as Figure 1-Figure 4 Shown: present embodiment provides a kind of dynamic coal discharging method of fully mechanized caving mining, comprises following coal discharging steps,

[0026] S1: Number the hydraulic supports 4 on the fully-mechanized mining face to be mined as No. 1, No. 2, No. 3, ..., No. N, No. N+1, where N is an integer not less than 1;

[0027] S2: The hydraulic support 4 includes a base 9, a tail beam 8, a cover beam 7, a column 10, a top beam 6, and a coal discharge plate 5, and the column 10 is fixed between the base 9 and the top beam 6, and the tail beam 8 and the base 9 side rotation connection, the upper end of the tail beam 8 is rotationally connected with the shield beam 7, the upper end of the shield beam 7 is rotationally connected with the top beam 6, and the coal discharge plate 5 is rotationally connected with the shield beam 7. According to the numbering sequence of the hydraulic support 4, first open No. 1 The coal discharge plate ...

Embodiment 2

[0030] The difference with Embodiment 1 is: according to the numbering sequence of the hydraulic supports 4, the coal discharge plates 5 of the No. 1 and No. 2 hydraulic supports 4 are first opened, and when the coal discharge plates 5 of the No. 1 and No. 2 hydraulic supports 4 set a certain amount of coal, Open the coal discharge plate 5 of No. 3 and No. 4 hydraulic supports 4 to discharge coal at the same time. When the coal discharge plate 5 of No. 3 and No. 4 hydraulic supports 4 discharges a certain amount of coal, open the coal discharge of No. 5 and No. 6 hydraulic supports 4 Plate 5 carries out coal discharge at the same time, and so on, when the coal discharge plate 5 of No. N-2 and N-1 hydraulic support 4 discharges a certain amount of coal, open the coal discharge plate 5 of No. N and N+1 hydraulic support 4 to carry out Simultaneously discharge coal, N is an integer not less than 2; at the same time, after each hydraulic support 4 coal discharge plate 5 sees gangue...

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Abstract

The invention discloses a dynamic coal discharging method for fully mechanized top-coal caving mining. The method includes the following coal discharging steps: S1. sequentially numbering hydraulic supports of a fully-mechanized top-coal working surface as No.1, No.2, No.3, ..., No. N and No. N+1, wherein N is an integer not less than 1; S2. firstly opening a coal discharging plate of the No.1 hydraulic support according to the numbering sequence of the hydraulic supports, opening a coal discharging plate of the No.2 hydraulic support for coal discharging when the coal discharging plate of theNo.1 hydraulic support discharges a certain amount of coal, opening a coal discharging plate of the No.3 hydraulic support for simultaneous coal discharging when a coal discharging plate of the No. Nhydraulic support discharges a certain amount of coal, and so on, and opening a coal discharging plate of the No. N+1 hydraulic support for simultaneous coal discharging when the coal discharging plate of the No. N hydraulic support discharges a certain amount of coal; and closing the coal discharging plates of each hydraulic support immediately when waste rock is seen. According to the method, the coal discharging plates of each hydraulic support are sequentially opened to discharge coal, so that waste rock is prevented from being placed in a low position too early, repeated working procedures of multiple rounds of coal discharging on the same coal discharging plate are avoided, the waste rock mixing rate is reduced, and the coal discharging efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of top coal caving mining, in particular to a dynamic coal caving method for fully mechanized caving mining. Background technique [0002] Fully mechanized caving mining is one of the main methods of thick coal seam mining in my country. It has developed rapidly in recent years and has achieved remarkable technical and economic benefits in coal mine production. However, fully mechanized caving mining, as one of the main methods of thick coal seam mining, needs to continue to improve and innovate in terms of production efficiency, recovery rate and supporting equipment level. [0003] However, in the face of new technical requirements, due to the repeated disturbance of the coal-rock interface in the existing fully mechanized caving mining technology, the gangue in the goaf is easily mixed into the bulk coal flow early, and often occurs in field operations. The premature closure of the coal slab leads to a lo...

Claims

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Application Information

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IPC IPC(8): E21C41/16
Inventor 杨胜利王家臣刘凤琪魏炜杰张锦旺
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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