Method for determining blasting action area of cylindrical charge in rock

A technology of action area and rock, which is applied in the field of safety science and impact dynamics, and can solve problems such as analysis and calculation without columnar charges

Inactive Publication Date: 2019-04-26
BEIJING INFORMATION SCI & TECH UNIV
View PDF4 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the widely used charge form in geotechnical engineering blasting is columnar charge, but most scholars explain the calculation of stress parameters of columnar charge with spherical charge theory through detonation theory analysis, and do not use columnar charge to calculate stress parameters. Analysis and calculation of its own characteristics

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for determining blasting action area of cylindrical charge in rock
  • Method for determining blasting action area of cylindrical charge in rock
  • Method for determining blasting action area of cylindrical charge in rock

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1, the method for measuring the blasting action area of ​​the columnar charge inside the rock

[0039] 1. Acquisition of a calculation model for determining the blasting action area of ​​the columnar charge inside the rock

[0040] 1. Rock crushing force analysis

[0041] After the columnar charge exploded inside the rock, many scholars at home and abroad have done a lot of research work on the rock breaking mechanism. At present, it is more popular to say that the rock is broken due to the joint action of the shock wave and the expansion pressure of the detonation gas. The ultimate crushing effect of the rock is related to the energy generated by the explosion and the mechanical properties of the rock itself. It is generally believed that the shock wave is first generated in the rock and then decays into a stress wave. In the initial stage, the pressure of the shock wave is much greater than the dynamic compressive strength of the rock. Therefore, the rock ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for determining a blasting action area of a cylindrical charge in rocks. The method comprises the following steps: according to the characteristic data of the following rocks and explosives before and after the cylindrical charge is exploded in rocks, namely the radius of a blast hole, the compressive strength of the rocks, the tensile strength of the rocks, the density of the rocks, the density of the explosives, the detonation velocity of the explosives, the longitudinal wave velocity and the Poisson's ratio of the rocks, bringing the above characteristic data into the formula I-1, formula I-2, formula I-3, calculating to obtain the blasting action area of the cylindrical charge in rocks, namely the radius of an enlarged cavity, the radius of a crushing area and the radius of a rupture area, which are respectively marked as r1, r2 and r3. According to the method, the enlarged cavity, the crushing area and the rupture area with rock mass destruction characteristics can be obtained through a model of a single column-shaped charge acting area in rocks. The compound structure is shown in the description.

Description

technical field [0001] The invention relates to a method for measuring the blasting action area of ​​a columnar charge inside a rock, and belongs to the field of safety science and technology or the field of impact dynamics. Background technique [0002] At present, the widely used charge form in geotechnical engineering blasting is columnar charge, but most scholars explain the calculation of stress parameters of columnar charge with spherical charge theory through detonation theory analysis, and do not use columnar charge to calculate stress parameters. Analyze and calculate its own characteristics. When the explosive pack explodes in the infinite rock medium, the strength of the shock wave it arouses in the rock mass decays rapidly with the increase of the propagation distance, so its effect on the rock mass also changes accordingly. If the rock mass after blasting is cut open, the internal action of the charge can be roughly divided into the following categories accordi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/313
CPCG01N3/313
Inventor 张函张君华戴丽萍
Owner BEIJING INFORMATION SCI & TECH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap