A collaborative network-based permeability-enhancing method for slotting and fracturing in low-permeability coal seams
A gas-permeable and slotted technology, which is applied in the direction of earth drilling, gas discharge, and mining fluids, can solve the problems of difficult control of the expansion direction of fracturing fractures and the small impact range of slotted drilling, so as to shorten the gas pre-pumping time , increase the effect of air permeability
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment Construction
[0018] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:
[0019] The specific steps of the low-permeability coal seam slotting and fracturing collaborative network anti-permeability method of the present invention are as follows:
[0020] a. Alternately arrange a plurality of slotted drill holes 1 and fracturing drill holes 2 in the direction of the coal seam 4 in the bottom pumping roadway 12, and the distance between the coal penetration points of adjacent drill holes is 5-10m, such as figure 2 shown;
[0021] b. Construct each slotted borehole 1 one by one, and use high-pressure water jet to slit each slotted borehole 1. The bottom of each slotted borehole 1 is 0.6-1.0m away from the coal seam roof to start slotting, and the thickness is 0.3 -0.5m annular slot 3, the radius of annular slot 3 is 0.6-1.5m, then drill outwards, and construct an annular slot 3 with a thickness of 0.3-0.5m every 1.0-1.5m until the...
PUM
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