Pillar mining method for gentle dip thin ores

A thin ore body, mining method technology, applied in surface mining, underground mining, special mining and other directions, can solve the problems of large safety hazards, large roof stress, rock movement, etc. The effect of impoverishment and reduction of loss rate

Active Publication Date: 2014-08-06
SANSHANDAO GOLD MINE SHANDONG GOLD MINING LAIZHOU
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  • Abstract
  • Description
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Problems solved by technology

The disadvantage of caving filling the goaf is that it will cause certain damage to the surface or cause certain rock movement
[0003] The pillars reserved by the open-field room-and-pillar method, beca

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  • Pillar mining method for gentle dip thin ores
  • Pillar mining method for gentle dip thin ores
  • Pillar mining method for gentle dip thin ores

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[0025] The present invention will be further described below with reference to the drawings and embodiments.

[0026] The first embodiment of a gently inclined thin ore pillar mining method of the present invention includes the following steps:

[0027] 1). The structure parameters of the original empty yard and room-pillar method stope are as follows: the strike width of the stope is 25m, the inclined length of the stope is 55-60m, and the section height is 15m. , Between the bottom pillar 8 and the inter-pillar 4, all the mined-out areas except the uphill 5 on the side of the inter-pillar are filled with glue ending sand to form a cemented packing 7, such as figure 1 As shown; in order to prevent the leakage of the filling material, the adjacent columns are sealed tightly with geotextile and the filling retaining wall 11, and the goaf is fully filled with dense top filling and stepwise filling, among them, close to the top column 2, bottom Within the 6m area of ​​column 8, the ma...

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Abstract

The invention discloses a pillar mining method for gentle dip thin ores. The method comprises the following steps: A, filling the goaf (except upward roadways on the studding side) among top pillars, bottom pillars and studding in an open-stope room-and-pillar method stope (in which stoping is finished) with cementing tailings to form a cemented filling mass; B, firstly stoping pillars in the goaf; then moving tailings and waste stone (dug in the process of stoping the first row of pillars) out of the stope and backfilling the goaf for stoping adjacent upper rows of pillars with tailings and waste stone (dug in the process of stoping other pillars); C, after pillars in the goaf are all stoped, filling the upper roadways and the goaf of pillars by one-time operation; D, after pillars and middle pillars in the whole middle section of the goaf are all stoped, remaining essential airways; for the sake of safety, transporting roadway frontals from the middle section, then going back for stoping top pillars and bottom pills according to a method of drift stroping with backfill, and carrying out alternative stoping and tightened filling. By virtue of the method disclosed by the invention, pillars reserved in the open-stope room-and-pillar method can be stoped safely and efficiently at low cost.

Description

technical field [0001] The invention belongs to the technical field of mining, and relates to a mining method for a gently inclined thin ore body ore pillar. Background technique [0002] The characteristic of mineral resources is non-renewable. With the continuous exploitation of mineral resources, geological reserves are decreasing year by year. In order to increase the recovery rate of mineral resources, it is necessary to recover the security pillars reserved in the original mining process. According to the current practice, the caving method is generally used to fill the goaf or the filling method is used to fill the goaf before the pillar is recovered. The disadvantage of caving filling the goaf is that it will cause certain damage to the surface or cause certain rock movement. [0003] The pillars reserved by the open-field room-and-pillar method, because the environment is a goaf, the roof stress is large, and the safety hazards of the pillar mining are great, so i...

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Application Information

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IPC IPC(8): E21C41/16
Inventor 毕洪涛于常先王瑞星何顺斌许子刚王蒙
Owner SANSHANDAO GOLD MINE SHANDONG GOLD MINING LAIZHOU
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