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

Underground cavity measuring method using flow quantity and flow velocity relationship

A technology of cavity and measuring device, applied in the field of surface subsidence survey, can solve the problems of complicated use of instruments, difficult maintenance, inconvenient measurement, etc., and achieve the effects of improving accuracy, overcoming narrow detection range and wide application range.

Inactive Publication Date: 2017-05-10
SHANDONG UNIV OF SCI & TECH
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the measurement methods of underground cavities in the prior art mainly include geological drilling method, geological radar measurement method, static penetrating method, etc. Geological structure, there will be problems of inconvenient and inaccurate measurement

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
  • Underground cavity measuring method using flow quantity and flow velocity relationship
  • Underground cavity measuring method using flow quantity and flow velocity relationship
  • Underground cavity measuring method using flow quantity and flow velocity relationship

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1: get a volume in the laboratory and be 12m 3 The gas storage tank is pumped into an approximate vacuum state, and an anemometer with a cross-sectional radius of 12cm is selected. First, the drill pipe is inserted into a section of pipeline connected to the gas storage tank, and the pipeline is blocked with a sealing capsule, and the second is closed. Stop valve 8, then open the first stop valve 6, observe the first pressure gauge 7, if the needle of the first pressure gauge rotates, it means that there is an underground cavity at the other end of the pipeline, immediately press the switch 14 of the biplane anemometer 3, and observe the counter 16. Record the wind speed every 3s, until the two-wing anemometer no longer rotates, press the switch 14 of the two-wing anemometer), and close the first cut-off valve 6, record the time used by the two-wing anemometer 3 from rotating to stop, As shown in Table 1.

[0049] Table 1

[0050]

[0051]

[0052] ...

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 an underground cavity measuring method using flow quantity and flow velocity relationship and belongs to the technical field of surface subsidence exploration. The method overcomes the drawbacks of small exploration range, expensive price and complicated operation and the like in the existing exploring underground cavity measurement. The method mainly uses the flow quantity and flow velocity relationship to measure the volume of the underground cavity. Data including lowest wind speed, highest wind speed and double-vane anemometer time from rotating to stopping are obtained through coordination between parts including a double-vane anemometer, an air compressor, a first pressure gauge, a second pressure gauge and the like, and the volume of the underground cavity is further obtained by calculation. Different from the measuring method in the prior art, the underground cavity measuring method using the flow quantity and flow velocity relationship is simple in operation, wide in application range and accurate and reliable in results.

Description

technical field [0001] The invention belongs to the technical field of surface subsidence survey, and in particular relates to a method for measuring underground cavities. Background technique [0002] In recent years, my country's economy has entered a period of rapid development, and great progress has been made in the construction of railways, highways, water conservancy, transportation and other projects. However, the geographical conditions are extremely complex and diverse, which brings pressure and difficulties to our construction, especially for some complex underground geological bodies, such as coal mine goafs, collapsible loess subsidence areas, karst cavities, faults Broken zones, etc., seriously affect the progress of construction and production, causing unnecessary economic losses, and at the same time, causing great harm to the life safety of construction workers. In order to reduce economic losses and improve production safety, it is necessary to measure the...

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): G01F17/00G01V9/00
CPCG01F17/00G01V9/00
Inventor 刘伟韬李强
Owner SHANDONG UNIV OF SCI & 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