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Double-layer overlapped goaf blasting treatment method

A treatment method and goaf technology, applied in blasting and other directions, can solve problems such as complex procedures and low efficiency, and achieve the effects of simple operation, high safety, and reduced processing difficulty

Active Publication Date: 2019-12-03
ANSTEEL GRP MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a method for blasting treatment of double-layer overlapping goafs, which solves the problems of complex procedures and low efficiency in the process of processing double-layer overlapping goafs. h , design the treatment method of the upper and lower goaf roofs, reduce the difficulty of double-layer overlapping goaf treatment, and improve the safety of construction

Method used

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  • Double-layer overlapped goaf blasting treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The rock mass in the double-layer goaf is mainly composed of phyllite with a rock density of 1300-1800kg / m 3 , the Platts firmness coefficient is 10, the length of the upper roof of the upper gob is 100 m, the width is 50 m, the thickness of the roof is 11-20 m, the length of the lower roof is 150 m, the width is 80 m, the thickness of the lower roof is 10-16 m, and the upper roof is 10-16 m thick. The height from the lower roof is 35 m.

[0034] Concrete process implementation steps are as follows:

[0035] 1) According to the measured data, blastholes 31 and penetration holes 2 on the roof of the upper goaf are arranged. The blast hole is 1 m from the boundary of the overlapping area;

[0036] 2) According to the measured data, the blastholes on the roof of the lower goaf in the overlapping area are arranged, and the penetration holes 2 are arranged in the overlapping area of ​​the upper goaf. The penetration holes are 1.5 m away from the blastholes in the upper goa...

Embodiment 2

[0045] The rock mass in the double-layer goaf is mainly composed of magnetite quartzite with a rock density of 3300-3400 kg / m 3 , the Platts firmness factor is 12-16, the length of the upper gob is 90 m, the width is 50 m, the thickness of the roof is 11-20 m, the length of the lower roof is 80 m, the width is 80 m, and the thickness of the lower roof is 13-18 m. The height between the upper roof and the lower roof is 30 m.

[0046] Concrete process implementation steps are as follows:

[0047] 1) According to the measured data, blastholes 31 and penetration holes 2 on the roof of the upper goaf are arranged. The blast hole is 1 m from the boundary of the overlapping area;

[0048] 2) According to the measured data, the blastholes on the roof of the lower goaf in the overlapping area are arranged, and the penetration holes 2 are arranged in the overlapping area of ​​the upper goaf. The penetration holes are 1.5 m away from the blastholes in the upper goaf. Between the horiz...

Embodiment 3

[0057] The rock mass in the double-layer goaf is mainly composed of granite with a rock density of 2700-3000 kg / m 3 , the Platts firmness factor is 10, the length of the upper gob is 90 m, the width is 50 m, the thickness of the roof is 14-18 m, the length of the lower roof is 100 m, the width is 70 m, the thickness of the lower roof is 12-17 m, the upper roof is The height from the lower roof is 40 m.

[0058] Concrete process implementation steps are as follows:

[0059] 1) According to the measured data, blastholes 31 and penetration holes 2 on the roof of the upper goaf are arranged. The blast hole is 1 m from the boundary of the overlapping area;

[0060] 2) According to the measured data, the blastholes on the roof of the lower goaf in the overlapping area are arranged, and the penetration holes 2 are arranged in the overlapping area of ​​the upper goaf. The penetration holes are 1.5 m away from the blastholes in the upper goaf. Between the horizontal lines of the hol...

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Abstract

The invention relates to a double-layer overlapped goaf blasting treatment method that comprises the following steps: using a three-dimensional laser scanner to detect the double-layer overlapped goaf; obtaining probe data and detection data, and arranging upper-layer goaf top plate blast holes; charging detonating bombs and emulsion explosives in the upper-layer goaf top plate blast holes, lower-layer goaf top plate blast holes and ultra-deep blast holes in the periphery of the upper-layer goaf, wherein the charging mode is as follows: respectively charging two detonating bombs and emulsionexplosives which are connected with detonating tubes, wherein the detonating bombs are positioned at the bottom and the middle-upper part of the blast holes; calculating the time t of the upper layergoaf top plate caving to the lower layer top plate according to the obtained measurement data; connecting the detonating tubes of the upper layer goaf top plate blast holes to form a complete blasting network, designing the delay time of differential blasting of the lower layer goaf top plate according to the time t of the upper layer goaf top plate collapses to the lower layer goaf top plate, sothat the upper layer top plate rocks can fall to impact the lower layer top plate to fully collapse while the lower layer goaf top plate blast holes are blasted.

Description

technical field [0001] The invention belongs to the technical field of mining engineering and blasting engineering, and relates to a double-layer goaf processing operation, in particular to a double-layer overlapping goaf blasting processing method. Background technique [0002] At present, the naturally formed double-layer goaf has the characteristics of wide distribution, difficulty in processing, strong concealment, poor regularity of spatial distribution characteristics, and serious consequences of goaf accidents. The drop impacts the lower roof, causing damage to the rock mass of the lower roof, and there are certain safety hazards when dealing with the lower roof. Liao Jiangnan used the deep hole treatment method in the open pit and the shallow hole treatment method in the goaf to deal with the overlapped goaf. The open-pit deep hole treatment method is to use the open-pit deep hole to collapse the roof rock mass of the goaf, and let its top pillar fall into the lower...

Claims

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Application Information

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IPC IPC(8): F42D1/08F42D3/04
CPCF42D1/08F42D3/04
Inventor 王永增王润曹洋孟磊磊李广尚李小帅徐振洋
Owner ANSTEEL GRP MINING CO LTD
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