Drawing and filling ores synchronous horizontal deep hole shrinkage method in the later stage after truck directly removing ores under polycrystalline substance
A technology of bottom structure and ore retention method, which is applied in the direction of filling, mining equipment, safety devices, etc., can solve the problems of low mining efficiency of rock mixing rate, achieve strengthening support, reduce dilution rate and loss rate, and ensure safety Effect
Inactive Publication Date: 2017-02-22
GUANGXI UNIV
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Problems solved by technology
It can simplify the mining unit, and the top pillars are mined together. While maximizing the ore recovery rate, it improves the problems of high rock mixing rate and low mining efficiency caused by the conventional open field method, and effectively controls the slab side of the surrounding rock. Caving and exposed areas of the mining area, optimizing the coordination of ore extraction and filling, and finally realizing safe, efficient, and low-cost coordinated mining
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[0030] The technical solutions of the present invention will be further described below through the accompanying drawings and embodiments.
[0031] Such as Figure 1 to Figure 3 Shown, under the bottom structure of the present invention, the truck directly goes out of the ore later stage ore drawing and filling synchronous horizontal deep hole ore retention method, comprising the following steps:
[0032] (1) Divide gently inclined extremely thick ore bodies or steeply inclined medium-thick-thick ore bodies into stages, and divide them into ore blocks along the ore body within the stages. The length of the ore block is 50m, the height is 50m, and the width is the thickness of the ore block , taking the ore block as the basic mining unit.
[0033] (2) Excavate a transport roadway 8 with a specification of 4m×3m in the middle of the bottom of the ore block, and dig a rock drilling patio 5 with a specification of 2m×2m from bottom to top to connect with the upper return air tunn...
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Abstract
A drawing and filling ores synchronous horizontal deep hole shrinkage method in the later stage after truck directly removing ores under polycrystalline substance divides the extreme thick ore body of low-angle dip or the middle thick ore body of high-angle dip into stages. A nugget is divided along ore body trend of the stage. Ores in the mineral building are collected together with fore-set ores with the horizontal deep hole shrinkage method. Ores are directly loaded into the truck by a drawing chute and is transported to the earth's surface. Ore heap is flattened before drawing a large amount of ores and flexible isolating layer is laid. The rate of filling waste stones is corresponding with the rate of releasing ores during drawing ores until ores'removal is finished. Ores'removal under polycrystalline substance has the advantage of good operational security, high production efficiency with direct ores'removal of truck, high ores'recovery ratio without leaving the fore-set in the nugget and little country rock disturbance with synchronously drawing and filling ores in the later stage.
Description
technical field [0001] The invention relates to a mining method for underground mining of metal mines, in particular to a method for ore retention in synchronous horizontal deep holes in the late stage of direct ore discharge by trucks under the bottom structure, which is suitable for gently inclined extremely thick ore bodies with moderate ore stability or above. Steeply inclined medium-thick orebody. Background technique [0002] The guiding ideology of the open-field mining method is to divide the ore block into a mine room and a pillar, and recover in two steps. In the meantime, the stability of the goaf is maintained with the help of the stability of the surrounding rock and the ore pillar itself, or the subsequent filling is used to ensure mining safety. However, if the goaf is too large or the time is too long and the filling is not timely, it may cause surrounding rock collapse, roof fall, collapse, etc. For mines with poor surrounding rock stability, the traditiona...
Claims
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Login to View More IPC IPC(8): E21F15/00
CPCE21F15/00
Inventor 陈庆发胡华瑞李世轩陈青林尹庭昌张绍国潘桂海陈德炎
Owner GUANGXI UNIV