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An uncompensated space blasting fault handling method

A fault handling method and non-compensated technology, which is applied in design optimization/simulation, instrumentation, informatics, etc., can solve the problem of large engineering volume, affecting normal mining progress and mine output, tunneling jumbo and medium-deep hole rock drilling jumbo Problems such as frequent transfer

Active Publication Date: 2021-02-05
NANJING MEISHAN METALLURGY DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a long construction period, a large amount of engineering, frequent transfer of the excavation jumbo and the medium-to-long hole drilling jumbo, and requires multiple blasting to complete the release of the compensation space, which greatly affects the normal mining progress and mine output.

Method used

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  • An uncompensated space blasting fault handling method
  • An uncompensated space blasting fault handling method
  • An uncompensated space blasting fault handling method

Examples

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specific Embodiment

[0041] The traditional rock drilling and blasting parameters of iron ore are as follows:

[0042] Rock drilling: three-center rock drilling, 9 holes, 91mm blasthole diameter, 2.4m row spacing, linear meters and inclination angle of blastholes (l 1 = l 9 =11.7, Ф=60°; l 2 = l 8 = 12.8, Ф = 70°; l 3 = l 7 =18.0, Ф=78°; l 4 = l 6 =21.0, Ф=85°; l 5 =24.0, Ф=90°).

[0043] Blasting: emulsified granular ammonium oil explosives, Aurikai high-precision detonator detonator, ore-breaking step distance 2.4m, hole-bottom distance 2.3-2.8m, charge density ρ=1.0g / cm 3 .

[0044] According to the downhole production and operation situation, the present invention is further clarified in combination with the application practice of field rock drilling and blasting parameters, the accompanying drawings and specific implementation methods.

[0045] ① Calculation and optimization of charge parameters of fan-shaped blast holes in the first row.

[0046] Detonation method: orifice detona...

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Abstract

The invention provides a fault handling method for space blasting without compensation. The method includes steps: ① Calculation and optimization of charge parameters of the first row of fan-shaped blastholes; ② Design and processing of the detection system; Provide basis for charge design; ④Calculation and optimization of charging parameters of fan-shaped blastholes in the second row; ⑤Measurement of joint fissure development and tensile height on site after blasting in row II; release of compensation space. The invention does not need to re-repair the middle and deep holes, and does not need to increase the engineering amount, and can be completed by means of the original blast hole.

Description

Technical field: [0001] The invention relates to a fault processing method for uncompensated space blasting, and belongs to the technical field of deep hole blasting fault processing methods. Background technique: [0002] When caving ore in underground metal mines often involves upward mid-depth hole blasting, the ellipsoidal caving bodies after blasting need to be squeezed out from the ore draw. In the field, it often happens that the flow of the ore is not smooth or the ore is not released in time after the blasting, which leads to head-on crowding, that is, the lack of compensation space for free-surface non-extrusion blasting. The traditional treatment method is to re-excavate a roadway at a certain distance from the head and arrange it perpendicularly to the head, re-drill medium-deep holes in the rock in this roadway, cut the groove twice, wait for the completion of the groove and release the compensation space again, and then follow the original method. The route is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20
CPCG16Z99/00
Inventor 李正刚
Owner NANJING MEISHAN METALLURGY DEV
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