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

System for testing surrounding rock characteristics of impact hole

A technology of property testing and hole surrounding rock, applied in the direction of strength properties, the use of repetitive force/pulse force to test the strength of materials, measuring devices, etc., can solve problems such as no clear specifications

Pending Publication Date: 2019-11-26
NANJING VOCATIONAL UNIV OF IND TECH +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the roller cone cutting drill cuts and induces the surrounding rock damage area, the wear of the drill bit is greatly reduced and the drilling efficiency is improved. However, how to match the roller cone cutting hole diameter D and the impact hole d, and how to choose the impact distance L is still unknown. clear specification

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
  • System for testing surrounding rock characteristics of impact hole
  • System for testing surrounding rock characteristics of impact hole
  • System for testing surrounding rock characteristics of impact hole

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] Such as Figure 1 to Figure 7 , a system for testing the characteristics of surrounding rock in impact holes in the present invention, including a frame, a hydraulic motor 1, a pressure chamber assembly 4, a pressure rod 5, a supercharger 8, an air compressor 9, a servo valve 10, and an electro-hydraulic proportional valve 11. Oil source 12, upper pressure head 18, axial extensometer 21, impact drill bit 22, vibration cylinder 29, radial extensometer 31, rock sample 32 and sealing sleeve 33.

[0031] The pressure chamber assembly 4 is placed on the frame, and a test chamber 40 is provided on the pressure chamber assembly 4. The upper indenter 18 is plugged into the pressure chamber assembly 4, and one end of the upper indenter 18 extends to the pressure chamber assembly. into 4 test chambers 40. The hydraulic motor 1 is fixed on the frame, and the output shaft...

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 system for testing the surrounding rock characteristics of an impact hole. A test cavity is arranged in a pressure chamber assembly. A rock sample is placed on a lower indenter in the test cavity. The top of an impact drill contacts the lower end face of the rock sample. A seal sleeve sleeves the outer wall of the rock sample. Upper and lower ends of the seal sleeve are fixedly connected with upper and lower indenters respectively. The rock sample is sealed in the seal sleeve. An axial extensometer and a radial extensometer are fixed on the outer wall of the seal sleeve. A pressing rod presses down the upper indenter, presses the upper indenter against the rock sample, and fixes the rock sample in the test cavity. The system provided by the invention can simultaneously measure the deformation characteristics of the surrounding rock of the impact hole under different confining pressures, different impact frequencies and different impact load combinations, and has a good use effect.

Description

Technical field: [0001] The invention relates to a testing system for the characteristics of surrounding rock of a percussion hole. Background technique: [0002] In the field of rock drilling in mines, in order to improve the operating efficiency of the drilling rig, the combined rock breaking method of impact cutting is often used. Impact-induced rock drilling principles, such as Figure 8 As shown (in the figure: 44, the rock in the induced damage area, 45, the rock in the impact crushing area), its working principle is as follows: the impact drill 43 impacts and drills the center hole under the action of the impact piston 41, and the rock around the impact induced center hole is unloaded , and cracks are generated under the action of original rock stress and impact disturbance load, which weakens the rock strength. At the same time, the roller cone bit 42 applies a rotating cutting force to the rock around the impact induced hole to cut and break the rock. P is the appl...

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): G01N3/307G01N3/36
CPCG01N3/307G01N3/36
Inventor 娄磊吴万荣栾云广
Owner NANJING VOCATIONAL UNIV OF IND TECH
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