End ore-drawing caving mining technology with high efficient using steel concrete composite man-made false roofs

A technology of artificial false roof and steel-concrete structure, applied in ground mining, mining equipment, earthwork drilling and other directions, can solve the problems of complex construction, low work efficiency, complicated roof laying process, etc., to improve the ore recovery rate and solve the problem of poor loss the effect of reducing the dilution of ore

Active Publication Date: 2012-04-18
ANSTEEL GRP MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The roof laying process is complicated and the work efficiency is low. The analysis in the paper often leaks the steel wire rope net, and the test results are not ideal
[0006] Patent CN97116285.9 "Underground Thick and Rich Ore Body Rope Net Isolation Method without Deficiency Mining Technology" is the first mining layer without bottom pillars, drilling rope holes in the inter-pillars between the access routes, and passing through them with ropes (tendons) These holes are connected with net ropes in the approach, and the intersections are reinforced and connected to form one or more isolation nets

Method used

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  • End ore-drawing caving mining technology with high efficient using steel concrete composite man-made false roofs
  • End ore-drawing caving mining technology with high efficient using steel concrete composite man-made false roofs
  • End ore-drawing caving mining technology with high efficient using steel concrete composite man-made false roofs

Examples

Experimental program
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Effect test

Embodiment 1

[0039] An application example of mining technology using artificial false roof with steel-concrete structure in end-drawing sub-level caving method without bottom pillar.

[0040] figure 1 It is an example of mining technology using steel-concrete structure artificial false roof in end-drawing ore-drawing step-by-step caving method, without changing the mining method of step-by-step caving method without bottom pillar, the mining roadways are arranged in a rhombus-shaped staggered manner , complete rock drilling, blasting and ore extraction in the mining roadway, and the mining roadway is the mining route 2, which is also the ore opening. This application example is characterized in that: the control point of the waste rock funnel is the bottom of the entire mining roadway, therefore, it only needs to be continuously laid at the bottom of all mining roadways 2 ends with mining roadways directly below with the mining of the mining face 1 Steel-concrete structure artificial fal...

Embodiment 2

[0042] Application example of mining technology using artificial false roof with steel-concrete structure in end-drawing sub-level caving method

[0043] Image 6 It is a schematic diagram of an example of the mining process using a steel-concrete structure artificial false roof in the segmented caving method with bottom pillars at the end of ore drawing according to the present invention.

[0044] The mining approach with sub-column caving method is composed of a rock-drilling roadway for ore falling and a bottom structure equipped with ore drawing, ore receiving and ore transportation. There are three types of structures: funnel type, trench type and flat bottom type. The bottom structure is arranged with ore-receiving roadway 15 and electric rake roadway 13. Under the condition of not changing the mining method of sub-section caving method with pillars, the mining approach is diamond-shaped Arranged in a staggered manner, the ore is drawn through the ore-receiving roadway ...

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PUM

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Abstract

The invention relates to an end ore-drawing caving mining technology with high using steel concrete composite man-made false roofs, characterized in that: in the stoping process of the end ore-drawing caving mining technology, with the stoping of the working face, waste-ore hopper control points at the ends of all stoping drifts continuously pave the man-made false roofs, the waste-ore hopper control points are arranged right above the stoping drifts, all stoping drifts which are provided with steel concrete composite man-made false roofs directly above the stoping drifts are subject to drilling, blasting and drawing under the shadow of man-made false roofs; the waste-ore hopper control point is an area which is located at the boundary between overlaying rock right above the draw holes and the caved ore and has the same width with the draw holes, and a man-made false roof comprises a structural steel support of the bottom layer of the bottom, a rhombic reinforcement mat of the top layer, and a concrete casting layer. According to the invention, caved ores can be separated from the overlaying rocks which are arranged in the top central area, the formation of the waste ore hopper is effectively prevented when ore drawing, thus the impoverishment and loss of ores obtained by the end ore-drawing caving mining technology is reduced, and the highly efficient end ore-drawing caving mining is realized.

Description

technical field [0001] The invention belongs to the technical field of underground mining methods, and in particular relates to a high-efficiency mining process using an end-drawing caving method using a steel-concrete structure artificial false roof. Background technique [0002] Underground mining methods include three basic processes of mining, cutting and back mining. According to the ground pressure maintenance method, they are divided into three categories: open-field mining method, filling method and caving mining method. The method of filling the goaf to control and manage the ground pressure, the end-drawing caving mining method is more typical of the segmented caving method with or without pillars and the segmented caving method with pillars, which have high mining intensity and high degree of mechanization. Medium-sized underground mines are the most widely used. The end-drawing caving mining method is to draw the ore under the overburden rock stratum. The pure o...

Claims

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Application Information

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IPC IPC(8): E21C41/22E21D19/00
Inventor 邵安林
Owner ANSTEEL GRP MINING CO LTD
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