Top-filled pillarless vertical end-wall sublevel caving method extraction technique

A stage caving and pillar-less technology, which is applied in ground mining, earthwork drilling, underground mining, etc., can solve the problems of overburden rock bonding, easy increase of bonding, and affecting fluidity, etc., achieving obvious economic benefits, The effect of preventing land subsidence

Inactive Publication Date: 2012-08-01
ANSTEEL GRP MINING CO LTD
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Problems solved by technology

[0014] According to powder engineering knowledge, when crushed stone containing powder meets water, its cohesiveness will easily become larger, affecting its fluidity
[0015] However, for some new mines, or due to the different properties of the overburden rock, the overburden rock is not easy to be eroded o

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  • Top-filled pillarless vertical end-wall sublevel caving method extraction technique
  • Top-filled pillarless vertical end-wall sublevel caving method extraction technique
  • Top-filled pillarless vertical end-wall sublevel caving method extraction technique

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Embodiment Construction

[0036] The specific implementation manner of the present invention will be further described below in conjunction with the accompanying drawings.

[0037] Such as Figure 1~7 As shown, a top-filled mining process of the vertical end wall stage caving method without bottom pillars of the present invention includes dividing the ore body into stages, and arranging the mining approach 1 in a diamond-shaped staggered manner in the stages, and dividing the stages into subsections , rock drilling, blasting and mining are all completed in the mining roadway 1, figure 12-1 is the overburden rock, 3 is the ore body caving range line of each approach, in the mining roadway 1, adopt the pre-concentrated rock drilling method to arrange upward fan-shaped middle and deep holes 5, and retreat under the overburden rock layer 2-1 When the end wall is in the same vertical position in each segment within the stage, the mining takes the stage as the unit, and each segment of the whole stage colla...

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Abstract

The invention relates to a top-filled pillarless vertical end-wall sublevel caving method extraction technique. The pillarless vertical end-wall sublevel caving method is characterized by comprising the following steps of: (1) after ore drawing is completed, stretching a grouting tube deep into overlaying rocks by using a grouting device at both sides and front part of the end part of a mining roadway besides the lowest sublevel roadway, injecting and permeating one liquid medium into overlaying rocks surrounding the ore drawing port and the end wall, laying aside for 1-3 days, eliminating excessive water in the overlaying rocks, and performing blasting and actual mining in the next ore caving step; and (2) filling tailings and broken stone into the top of a gob so as to prevent surface subsidence. Compared with the traditional underground extraction method, the pillarless vertical end-wall sublevel caving method solves the problems of great loss dilution and surface subsidence of the caving method, has lower loss dilution index than the open-stope method and the filling method and also has the advantages of simple structure, large production capacity and high production efficiency.

Description

technical field [0001] The invention belongs to the technical field of underground mining methods, and in particular relates to a stage-caving mining process with a top-filled vertical end wall without a bottom column. Background technique [0002] Underground mining methods include three basic processes of mining, cutting and mining, and are divided into three categories according to the method of ground pressure maintenance: open-field mining method, filling method and caving mining method. [0003] In the open-stop mining method, the ore block is divided into ore rooms and ore pillars in the process of mining. The stope mainly relies on the temporary ore pillars or permanent ore pillars for natural support, sometimes supplemented by artificial ore pillars. The mining pillar and the timely treatment of the goaf are suitable for mining deposits where the ore and surrounding rock are very stable. The goaf is allowed to have a larger exposed area within a certain period of ti...

Claims

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Application Information

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IPC IPC(8): E21C41/16
Inventor 邵安林
Owner ANSTEEL GRP MINING CO LTD
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