Method for intensifying coal seam water injection through pressing dynamic-electrodynamic coupling effect
A coal seam water injection and action technology, applied in the direction of mining fluid, wellbore/well components, earthwork drilling and mining, etc., can solve problems such as insufficient coal wetting
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment approach 1
[0025] Implementation of a method for enhanced coal seam water injection through pressure-electric coupling, the method is carried out in the following steps:
[0026] Step 1. The length of the working face of a mine is 150m, the thickness of the coal seam is 3.2m, and the type of coal mined is anthracite. The coal seam of a mine is drilled and sampled, and the uniaxial compressive strength of the coal sample is 7.36MPa, and the porosity is 3.82%. , water content 1.18%, water permeability coefficient 3.515×10 -4 cm 2 ·atm -1 ·s -1 , to determine the maximum water injection pressure 15MPa.
[0027] Step 2. Use the coal-rock electric-pneumatic triaxial seepage test device to measure the electric permeability coefficient of the coal sample to be 8.578×10 -4 cm 2 ·V -1 ·s -1 , using a micro-electrophoresis instrument to test the zeta potential of anthracite samples in aqueous solutions with different pH values, see attached image 3 , considering that the excessive pH of t...
Embodiment approach 2
[0033] Step 1. The length of the working face of a certain second mine is 200m, the thickness of the coal seam is 2.8m, and the mined coal is coking coal; the coal seam of a certain second mine is drilled and sampled, and the uniaxial compressive strength of the coal sample is determined to be 5.92MPa, and the porosity is 2.35%. , water content 1.64%, water permeability coefficient 1.906×10 -4 cm 2 ·atm -1 ·s -1 , to determine the maximum water injection pressure 16MPa.
[0034] Step 2. Use the coal-rock electric-pneumatic triaxial seepage test device to measure the electric permeability coefficient of the coal sample to be 11.493×10 -4 cm 2 ·V -1 ·s -1 , using a micro-electrophoresis instrument to test the zeta potential of coal samples in different pH aqueous solutions, see attached Figure 4 , considering that the excessive acidity and alkalinity of the coal sample will cause equipment corrosion, the pH of the injection solution is determined to be 8.5, and the elect...
PUM
Property | Measurement | Unit |
---|---|---|
Uniaxial compressive strength | aaaaa | aaaaa |
Uniaxial compressive strength | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
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