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A segmented caving collaborative mining method with flexible isolation layer acting as a false roof

A segmented caving and mining method technology, which is applied in ground mining, mining equipment, underground mining, etc., can solve the problems of poor effect of single-headed ventilation roadway and high rock mixing rate, so as to reduce dilution rate and loss rate, and reduce mixing volume effect

Active Publication Date: 2019-01-04
GUANGXI UNIV
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Problems solved by technology

[0003] The object of the present invention is to provide a segmental caving collaborative mining method in which the flexible isolation layer acts as a false roof, which can overcome the excessively high rock mixing rate and the single-headed ventilation tunnel effect caused by the conventional segmental caving method when the ore body is mined. Poor disadvantages, reduce the amount of mixed ore rocks, improve the ventilation effect, the coordination of ore collapse and ore extraction, limit the mixing of waste rocks to the greatest extent, and finally realize safe, efficient and low-cost collaborative mining

Method used

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  • A segmented caving collaborative mining method with flexible isolation layer acting as a false roof
  • A segmented caving collaborative mining method with flexible isolation layer acting as a false roof
  • A segmented caving collaborative mining method with flexible isolation layer acting as a false roof

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Embodiment

[0023] refer to figure 1 , figure 2 and image 3 , the present embodiment carries out mining for the steeply inclined thick ore body with solid ore body, comprising the following steps:

[0024] (1) Divide the steeply inclined thick ore body into stages, and divide the stages into ore blocks along the strike. The ore blocks are 60m long and 20m wide, and they are layered according to 7-8m; a 3m-high formation is mined by the pillar method on the upper part of the ore block. The top space, and flexible materials are laid on the bottom plate in the order of steel wire rope, metal mesh and polyester fiber, and then the covering is lowered to form a covering layer.

[0025] (2) From the stage along the vein transportation roadway 6, a ventilated pedestrian patio 3 with a size of 2m×2m and an ore chute 2 with a size of 2m×2m are excavated upwards to connect the upper stage along the vein transportation roadway 1, and 3m×3m is excavated from the ore chute 2 The sub-level transpo...

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Abstract

The invention discloses a sublevel caving collaborative mining method with a flexible isolating course as an artificial roof. The sublevel caving collaborative mining method comprises the specific steps that firstly, a roof building space is formed on the upper portion of an ore block in a pulling mode with a supporting column method, the flexible isolating course artificial roof is spread on a bottom plate, and when roof building work is promoted, meanwhile, caving is conducted on upper surrounding rock to form a covering layer; and secondly, mining field stoping operation is conducted according to the sublevel caving method, specifically, a stoping drift is arranged to be rhombic, rock chiseling and ore caving are conducted in a mode from a shallow hole to a medium-length hole, and ore is transported out through a scraper. According to the sublevel caving collaborative mining method with the flexible isolating course as the artificial roof, compared with existing sublevel caving methods, the waste stone mix rate is decreased, the ore recovery rate is increased, and the ventilation effect is improved; and meanwhile, the sublevel caving collaborative mining method has the advantages of being high in production efficiency and ore block production capacity.

Description

technical field [0001] The invention relates to a mining method for underground mining of metal mines, in particular to a segmental caving collaborative mining method in which a flexible isolation layer acts as a false roof, which is suitable for metal mines with high ore grade and high value where caving is allowed on the ground surface. Gently inclined extremely thick ore body or steeply inclined thick ore body above medium stability. Background technique [0002] The segmented caving method is mainly used for mining steeply inclined thick ore bodies or gently inclined extremely thick ore bodies with ore above medium stability. The mining roadway does not need a lot of support, and the upper and lower mining roadways are arranged in a staggered manner. It has good safety and is a mining method. Simple structure and high degree of mechanization. However, when this method is used, the loss of ore is large, the rate of rock mixing is high, and the ventilation of the mining r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/22E21F1/00
CPCE21C41/22E21F1/006
Inventor 陈庆发胡华瑞陈青林李世轩尹庭昌郑文师
Owner GUANGXI UNIV
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