U-well Integrated Mining System for Coal Extraction and Fluid Recycling
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Solution Overview
Problem
Conventional coal mining methods face inefficiencies due to the dependency of coal mining and transportation processes, limited by dip angles which can lead to blocked transportation lanes and waste of resources, particularly in the recycling of jet fluid.
Innovation Solution
An integrated mining method and system for coal breaking, extraction, and water circulation in a U-well, combining jet breaking technology with air lift reverse circulation technology, and incorporating a system for recycling jet fluid through ground facility units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional coal mining methods are used with separate mining and transportation processes, then the coal can be extracted and transported, but the coal-water mixture accumulates in the transportation lane and blocks it easily, reducing mining efficiency
Solution Approach 1:
The patent combines coal breaking and coal extraction into a single integrated process within the U-well. The jet unit breaks coal while the extraction unit simultaneously removes the coal-water mixture, eliminating the separate transportation lane and preventing blockages by continuously extracting material as it is generated.
Solution Approach 2:
The integrated system maintains continuous operation where coal breaking and extraction occur simultaneously without interruption. The jet unit and extraction unit work in tandem to ensure the coal-water mixture is immediately removed after generation, maintaining continuous flow and preventing accumulation that would cause blockages.
2Productivity
If conventional coal mining methods are used, then coal can be extracted, but jet fluid cannot be recycled, resulting in resource waste
Solution Approach 1:
The patent implements a recycling system where the ground facility units collect and treat the coal-water mixture, separate and recover the jet fluid, and return it to the jet unit for reuse. This closed-loop system prevents jet fluid waste while maintaining continuous coal extraction operations.
Solution Approach 2:
The ground facility units serve multiple functions: they receive the coal-water mixture, separate coal from fluid, recycle the jet fluid back to the jet unit, and handle the extracted coal. This multi-functional system simultaneously achieves coal extraction and fluid recovery, eliminating the need for separate recycling operations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This integrated approach enhances coal mining efficiency by synchronizing coal breaking and extraction processes, reduces resource waste through fluid recycling, and minimizes costs associated with time and manpower.
Implementation Method 1
breaking, by the jet unit, a coal seam in a sub-segment at a current position according to a preset breaking angle and a preset breaking radius to obtain broken cinders; where, the jet unit includes: a jet lance; where, the jet lance is provided with a spray nozzle; a spray direction of the spray nozzle is at an acute angle to a directional drill pipe of the extraction unit
Implementation Method 2
combining jet breaking technology with air lift reverse circulation technology
Data Source
AI summary
Disclosed are an integrated mining method and an integrated mining system of coal breaking, coal extraction and water circulation in a U-well. The integrated mining system includes a first ground facility unit, a second ground facility unit, a jet unit and an extraction unit. The first ground facility unit is configured to transport jet fluid to the jet unit. The jet unit is configured to break a coal seam in a sub-segment to obtain broken cinders. The extraction unit is configured to extract a coal-water mixture. The second ground facility unit is configured to receive the coal-water mixture. In response to determining that an extraction of the sub-segment is complete, the jet unit and the extraction unit is configured to move to a next sub-segment using powers provided by the first ground facility unit and the second ground facility unit.