Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Multi-row micro-differential roadbed deep hole blasting construction method

A technology of deep hole blasting and construction method, which is applied in blasting and other directions, and can solve problems such as inability to accurately control blasting rock particle size, embankment slope smooth surface effect and stability, steep terrain, complex landform, etc.

Active Publication Date: 2011-11-02
HUITONG ROAD & BRIDGE CONSTR GROUP
View PDF4 Cites 39 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the steep terrain, complex topography and large excavation depth of expressways in mountainous areas, it brings great difficulty to the blasting construction of roadbed stonework
Since the traditional blasting technology cannot accurately control the particle size of the blasted rock, the quality of the roadbed slope, the smooth effect and stability of the roadbed slope, and affects the quality of roadbed backfill, construction cost and progress, it is imperative to study new technologies for roadbed blasting construction. Row

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
  • Multi-row micro-differential roadbed deep hole blasting construction method
  • Multi-row micro-differential roadbed deep hole blasting construction method
  • Multi-row micro-differential roadbed deep hole blasting construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0060] This embodiment is a further illustration of the present invention, rather than a limitation of the present invention.

[0061] The process of blasting the subgrade in this embodiment is as follows:

[0062] 1. Calculation of blasting parameters

[0063] For areas with large excavation depths, the degree of weathering of rocks varies with the excavation depth. The greater the excavation depth, the harder the rocks, the greater the difficulty of blasting, the easier it is to leave roots, and the rate of large blocks also increases. For medium and deep hole blasting, its parameters should be accurately grasped to avoid unnecessary losses. For medium and deep hole blasting, the blasting parameters mainly include the blasting parameters of the intermediate body, namely the blasting parameters of the groove and the blasting parameters of the slope.

[0064] 1. Grooving blasting parameters:

[0065] Unit consumption (2# rock explosive): due to the low degree of weathe...

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 relates to a multi-row micro-differential roadbed deep hole blasting construction method, which comprises the following steps of: (1) selecting blasting parameters; (2) calculating security; (3) arranging a stair and a free face; (4) distributing holes and drilling holes; and (5) blasting. The blasting method is a multi-row deep hole millisecond micro-differential blasting method; and the blasting is performed by pull trough blasting and side slope blasting in a roadbed sequentially, wherein the pull trough blasting is loose blasting and the side slope blasting is precraking blasting. In the method, a shock conducting tube non-electric priming system micro-differential control blasting technology, a comprehensive blasting construction scheme of loose blasting, the deep hole millisecond micro-differential blasting technology and the roadbed side slope precraking blasting technology, and a wide-pitch and low-resistance hole distribution mode are adopted, so that explosivesand detonators are saved, the drilling mechanization degree is enhanced, the labor cost is reduced, the blasting effect is enhanced, the large rate of blast rocks is reduced, the material abandoning rate is reduced and harms of blasting vibration, impact waves, flying stones and the like are reduced; furthermore, when the blasting effect is enhanced and the stability of the blast roadbed side slope rocks is guaranteed, the absolute safety of blasting can be guaranteed.

Description

technical field [0001] The invention relates to a construction method for deep-hole blasting of a multi-row micro-difference subgrade. technical background [0002] With the continuous development of expressway construction projects in our country to the depth of mountainous areas, the proportion of expressway roadbed stonework in roadbed earthwork is increasing, and the task of roadbed stonework blasting is becoming more and more heavy. Due to the steep terrain, complex topography, and large excavation depth of expressways in mountainous areas, it brings great difficulty to the blasting construction of roadbed stonework. Since the traditional blasting technology cannot accurately control the particle size of the blasted rock, the quality of the roadbed slope, the smooth effect and stability of the roadbed slope, and affects the quality of roadbed backfill, construction cost and progress, it is imperative to study new technologies for roadbed blasting construction. Row. C...

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): F42D1/00F42D3/04
Inventor 张忠山赵建军李瑞喜蔡献东禹海龙周长亮孙正仓
Owner HUITONG ROAD & BRIDGE CONSTR GROUP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com