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Blasting hole pressure bearing test method

A technology of pressure test and blast hole, which is applied in the field of blasting experiments, can solve the problems of safety risks, explosion energy waste, ore loss, etc., and achieve the effect of simple and effective test circuit, large measurement range and long acquisition time

Pending Publication Date: 2021-09-28
GUIZHOU XINLIAN BLAST ENG GRP
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] In the prior art, so far, in most rock blasting, uncoupled charges have been dominated by empirical design, which has caused over-under-excavation, ore loss, safety risks and waste of blast energy to varying degrees

Method used

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Embodiment Construction

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention.

[0020] see Figure 1 to Figure 2 , the present invention provides a technical solution: a blasting hole pressure test method, characterized in that it includes the following steps:

[0021] Step 1: Model construction. By pouring a concrete model with a similarity ratio of 1:1, the blasting process of the tunnel construction site is simulated. According to the PVDF pressure sensor pasted on the wall of the blast hole and the strain brick pre-embedded in the concrete model, Measure the peak pressure time history curve of the surrounding hole wall and the radial and tangential stress distribution at different measuring points in the medium around the blasthole. The full-scale concrete blasthole model belongs to the mass concrete model, which makes the measures for pouring and maintenance It is ve...

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Abstract

The invention provides a blasting hole pressure bearing test method. The blasting hole pressure bearing test method comprises the following steps of model construction, blasting hole arrangement, blasting hole processing, detection piece installation, sampling detection, interference elimination, blasting experiment and data processing and analysis. According to the blasting hole wall dynamic peak pressure test system constructed based on the PVDF sensor, the test circuit is simple and effective, the frequency band response is wide, the acquisition time is long, and the test system has the characteristics of large measuring range, wide frequency response, long acquisition time and negligible temperature influence when the pressure below 10Gpa is measured; the hole wall pressure time-history curve can be accurately captured in time under the complex explosion environment in the hole, and the in-hole pressure time-space distribution rule can be deeply researched.

Description

technical field [0001] The invention relates to the technical field of blasting experiments, in particular to a method for testing the pressure of a blasting hole. Background technique [0002] The uncoupled charge structure is a typical charge structure, which is mainly divided into radial uncoupled charge and axial uncoupled charge. Radial uncoupled usually means that the diameter of the explosive is smaller than the diameter of the borehole, and the axial Uncoupled means that the explosives are placed at intervals in the axial direction of the blast hole, and generally water or air is used as the filling medium. Especially, air uncoupled charges are most widely used in related blasting projects such as mining, tunnel excavation, and slopes. The uncoupled charge structure has great advantages over the coupled charge, and plays an extremely important role in smooth blasting, pre-splitting blasting and step blasting. In smooth surface blasting and pre-splitting blasting, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/313G01L5/14
CPCG01N3/313G01L5/14G01N2203/001
Inventor 李杰赵明生夏德云周建敏
Owner GUIZHOU XINLIAN BLAST ENG GRP
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