A coupling fracturing method for hard coal seam roof
A technology of coal seam roof and hard roof, which can be used in earth-moving drilling, discharging machinery, etc., can solve the problems of reducing the degree of fracture, waste of drilling, easy closing, etc. Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment Construction
[0022] The present invention will be further described below in conjunction with the embodiment in the accompanying drawings:
[0023] The hard coal seam roof coupling fracturing method of the present invention, concrete steps are as follows:
[0024] a. Drilling: First, use a drilling rig to drill multiple holes into the hard roof 1 to the design depth. The multiple holes include the static fracturing hole 3 and the pulsating hydraulic fracturing hole 2. Both sides of the static fracturing hole 3 The boreholes used are pulsating hydraulic fracturing holes 2, and every two pulsating hydraulic fracturing holes 2 and one static fracturing hole 3 are combined into a fracturing system, and the spacing between the holes in the fracturing system is 4.5–5m. The depth of the fracturing borehole 2 is 10-13m, and the depth of the static fracturing borehole 3 is 12-15m. The direction of the static fracturing borehole 3 is the direction normal to the roof, and the included angles between...
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