Inventor

ZENG YIFAN

CN22 patents

⚠️ This page may combine multiple inventors who share the name “ZENG YIFAN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

ZENG YIFAN

UNIV CHINA MINING

Method for blocking mine water inrush

Method for repairing aquifer in coal mine area

Filling bag and sealing method for drilled hole for detection in three zones of overburden

Directional drilling device and drilling method of aquifer remediation of coal seam roof

Directional drilling method for branching borehole with short radius and system

Coal and coalbed methane mining system based on ground drilling, method and related device

Method of segmented grouting for repairing aquifers in mining area

Grouting and water blocking method for directional hole with large offset in hard rock stratum

System and method of transient electromagnetic advanced detection

System and method for monitoring water inrush

Methods for grout injection repair and water retention in goaf

Coal rock interface directional detection device and method based on elastic waves

Tracer diffusion device, system for tracing development of water conducting fracture zone and relataed method

Geomechanical fluid-solid coupling testing device for water inrush from coal mine collapse column

Coal mining system and method of dual circulation drilling with mechanical reaming and abrasive jet

Integrated mining method of coal breaking, coal extraction and water circulation in U-well and system thereof

Method and device for determining development status of separation layer of coal mine

WUHAN CHANGSHENG MINE SECURITY TECH LIMITED

Three-dimensional directional transient electromagnetic detection device and method for mining borehole

Three-dimensional digital virtual imaging device and method for stratigraphic texture of borehole core

Borehole while drilling electromagnetic tomography advanced detection apparatus and method

UNIV TONGJI

Method for strengthening biological manganese oxidation using magnetic field and use thereof

UNIV CHINA MINING & TECHNOLOGY BEIJING

Bidirectional variable cross-section water-pressure bearer cycle test system for coal mine water inrush model test