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

Underground backfill material suitable for karst regions and preparation method thereof

A regional and karst technology, applied in the field of preparation of underground backfill materials, can solve problems such as development lag, backfill materials falling into cracks, and high maintenance costs, and achieve the effects of speeding up the construction schedule, solving subsidence problems, and improving thermal conductivity

Inactive Publication Date: 2020-08-25
GUIZHOU UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The potential of shallow geothermal energy is huge, and it is known as the "earth power bank". However, the development of shallow geothermal energy in my country is currently lagging behind. In actual engineering, water-bearing karst structures are often encountered, the porosity is low, or the backfill materials are trapped in karst structures such as cracks, which leads to the decrease of materials in buried holes year by year, and partial subsidence of the ground, causing irreversible damage to related settings. Maintenance costs are huge

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: An underground backfill material suitable for karst areas, including the following raw materials in mass fractions: 400g of base material, 50g of permeable material, 5g of adhesive and 5g of retarder; the base material is granite, dolomite or limestone; The adhesive is sodium silicate; the permeable material is fired permeable brick; the retarder is citric acid.

[0020] The above-mentioned base materials are based on local conditions. Since the heat exchange rate of rocks in karst areas is relatively high, raw sand (granite, dolomite or limestone) is basically used for backfilling, which is convenient for materials and can effectively utilize engineering waste.

[0021] The above-mentioned adhesives do not use materials with poor water resistance such as lime or gypsum, in order to prevent the later materials from being diluted and dissolved by long-term immersion in water, so sodium silicate, an adhesive with good viscosity and water resistance, is select...

Embodiment 2

[0032] Embodiment 2: An underground backfill material suitable for karst areas, including the following raw materials in mass fractions: 450g of base material, 100g of permeable material, 25g of adhesive and 25g of retarder; base material is granite, dolomite or limestone; glue The adhesive is sodium silicate; the permeable material is fired permeable brick; the retarder is citric acid.

[0033] The above-mentioned base materials are based on local conditions. Since the heat exchange rate of rocks in karst areas is relatively high, raw sand (granite, dolomite or limestone) is basically used for backfilling, which is convenient for materials and can effectively utilize engineering waste.

[0034] The above-mentioned adhesives do not use materials with poor water resistance such as lime or gypsum, in order to prevent the later materials from being diluted and dissolved by long-term immersion in water, so sodium silicate, an adhesive with good viscosity and water resistance, is se...

Embodiment 3

[0045] Embodiment 3: An underground backfill material suitable for karst areas, including the following raw materials in mass fractions: 425g of base material, 75g of permeable material, 15g of adhesive and 15g of retarder; the base material is granite, dolomite or limestone; The adhesive is sodium silicate; the permeable material is fired permeable brick; the retarder is citric acid.

[0046] The above-mentioned base materials are based on local conditions. Since the heat exchange rate of rocks in karst areas is relatively high, raw sand (granite, dolomite or limestone) is basically used for backfilling, which is convenient for materials and can effectively utilize engineering waste.

[0047] The above-mentioned adhesives do not use materials with poor water resistance such as lime or gypsum, in order to prevent the later materials from being diluted and dissolved by long-term immersion in water, so sodium silicate, an adhesive with good viscosity and water resistance, is sele...

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

PropertyMeasurementUnit
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses an underground backfill material suitable for karst regions and a preparation method of the underground backfill material. The underground backfill material comprises the following raw materials in percentage by mass: 80%-90% of a base material, 10%-20% of a water permeable material, 1%-5% of an adhesive and 1%-5% of a retarder, wherein the adhesive is sodium silicate. Thebackfill material mainly solves the problem that underground water is difficult to treat in karst regions, can overcome the problem that a conventional backfill material sinks and can be effectively improved tin heat conduction effect through the water absorption and release effects of external special materials; the selected backfill material in the invention enables shallow low-temperature energy to be effectively utilized and stored; in addition, the backfill material enables an early-stage drilling disposal rate to be greatly reduced, project progress to be accelerated and late-stage maintenance cost to be low, and therefore, the utilization and popularization strength of shallow geothermal energy is improved.

Description

technical field [0001] The invention belongs to the technical field of underground backfill materials in karst areas, relates to an underground backfill material suitable for karst areas, and also relates to a preparation method for underground backfill materials suitable for karst areas. Background technique [0002] The potential of shallow geothermal energy is huge, and it is known as the "earth power bank". However, the development of shallow geothermal energy in my country is currently lagging behind. In actual engineering, water-bearing karst structures are often encountered, the porosity is low, or the backfill materials are trapped in karst structures such as cracks, which leads to the decrease of materials in buried holes year by year, and partial subsidence of the ground, causing irreversible damage to related settings. Maintenance costs are huge. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an underg...

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): C04B28/26C04B38/08
CPCC04B28/26C04B14/048C04B14/26C04B14/28C04B18/027C04B24/06C04B38/08
Inventor 裴鹏罗婷婷
Owner GUIZHOU UNIV
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