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Chamber and deep hole blasting method of gob

A technology of deep hole blasting and goaf, applied in blasting and other directions, can solve the problem of high processing cost, and achieve the effects of simple operation, high mining intensity and low dilution rate

Inactive Publication Date: 2013-12-04
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tailings or cemented fillings are used to deal with steeply inclined, medium-thick or thick goafs, and the treatment costs are more expensive, and a filling system needs to be established

Method used

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  • Chamber and deep hole blasting method of gob
  • Chamber and deep hole blasting method of gob
  • Chamber and deep hole blasting method of gob

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0026] like figure 1 As shown, the mining of the ore body forms a goaf 2 and a spacer 1. For the convenience of description, the spacer 1 is sequentially numbered as 1#, 2#, 3#, 4#, and 5#. The inter-column 1 is handed over to the top column or the top and bottom columns 3, and there is a goaf mine room 2 between them.

[0027] like figure 2 As shown, interval 1#, 3# intercolumn 1 is extracted from the first middle section to the third middle section from top to bottom 2# intercolumn 1 and the top or top and bottom columns 3 on both sides, and at the same time in the first middle section or the second middle section floor In the corresponding surrounding rock of the upper wall, the horizontal construction roadway 12 for deep hole rock drilling is constructed along the direction of the goaf 4, and then the deep hole 5 rock drilling is implem...

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PUM

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Abstract

The invention discloses a chamber and deep hole blasting method of a gob. The method of the invention comprises the steps of: firstly extracting a rib pillar and support pillars or bottom support pillars on the two sides of the rib pillar from the top down, and then, performing deep hole blasting on the hanging side of the worked out section along the ore body direction after extracting the ore pillars at each 2-3 middle segments, filling the barren rocks generated in deep hole blasting and a horizontal construction tunnel of deep hole drilling in the worked out section on the lower part of the construction tunnel formed by extraction in situ, namely, filling the worked out section on the lower part to certain thickness after extracting the ore pillars, cutting a part of triangular prism loads moved downward of the hanging side and avoiding the excessive damage of the surrounding rock of the reserved hanging side so as to limit the hanging side and the reserved rib pillar from generating excessive rock mass movement or damage toward the worked out section; and if the barren rocks generated in the deep hole blasting and the construction tunnel cannot meet the filling thickness and filling demand of the worked out section on the lower part, performin auxiliary chamber blasting along the hanging side direction can be conducted, and the gob is treated to limit the hanging side from generating excessive rock mass movement or damage so as to protect the integrity of the upper layer ore body lagging behind in the extraction operation.

Description

technical field [0001] The invention relates to a treatment method for steeply inclined medium-thick and thick goafs, in particular to a chamber and deep hole blasting method for goafs. Background technique [0002] The goaf is a "cavity" formed under the surface by artificial mining or the dredging of natural karst caves. The existence of the goaf causes excessive stress concentration on the roof, which makes the safe production of the mine face a great safety hazard, which may cause the roof to suddenly fall Or the ground suddenly subsides, resulting in injury accidents. [0003] For medium-thick or thick mining areas with upper ore bodies that need to be protected, a large number of ore pillars need to be recovered after mining with the room-and-pillar method. It is necessary to properly recover the ore pillars and deal with the gobs to avoid accidents caused by sudden fall or subsidence. In the past, waste rocks and other fillings were generally used to deal with steepl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42D1/00
Inventor 李俊平刘武团赵永平杨忠雷明礼姚铁兵寇坤郭生茂焦满岱于斌刘文泰
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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