Microwave Plasma Rock Breaking Device for Insensitive Rocks
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Solution Overview
Problem
Microwave rock breaking technology is ineffective on microwave-insensitive rocks, limiting its application in tunnel engineering due to the inability to fracture these rocks and potential damage to equipment from excessive microwave irradiation.
Innovation Solution
A microwave plasma adaptive rock breaking device that combines microwave and plasma technology, using a single microwave source to dynamically convert and irradiate rocks with plasma torches at high temperatures (3000-6500K), integrating a microwave system, plasma conversion system, and cutter head system to address the issue of microwave-insensitive rocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If microwave rock breaking technique is used, then tunneling speed is increased for microwave-sensitive rocks, but it has no effect on microwave-insensitive rocks
Solution Approach 1:
The patent integrates two rock breaking techniques (mechanical cutting and microwave heating) into a single cutter head system, enabling the equipment to handle both microwave-sensitive and microwave-insensitive rocks effectively. The cutter head is designed with both mechanical cutting tools and microwave applicators, making the system universal for different rock types.
Solution Approach 2:
The patent combines mechanical rock breaking and microwave rock breaking into an integrated system. The cutter head incorporates both mechanical cutting elements and microwave heating apparatus, allowing simultaneous or alternating operation of both techniques to address different rock characteristics.
2Adaptability or versatility
If water jet is combined with microwave rock breaking for microwave-insensitive rocks, then cracking capability is improved, but process flow and equipment structure become more complex
Solution Approach 1:
The patent extracts the water jet system from the proposed solution and replaces it with mechanical cutting tools integrated into the cutter head. This eliminates the need for separate water jet equipment while maintaining the capability to handle microwave-insensitive rocks through mechanical means.
3Adaptability or versatility
If plasma rock breaking is used, then application range for different rocks is widened, but efficiency for microwave-sensitive rocks is reduced
Solution Approach 1:
The patent enables dynamic switching between microwave heating mode and mechanical cutting mode based on rock type detection. For microwave-sensitive rocks, the system operates in microwave heating mode for high efficiency, while for microwave-insensitive rocks, it switches to mechanical cutting mode, optimizing performance for each rock type.
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
Enables effective cracking of microwave-insensitive rocks by combining ordinary microwave irradiation with high-temperature plasma, expanding the application scope of microwave rock breaking technology while maintaining a simple and portable device structure.
Implementation Method 1
The essence of the microwave rock breaking lies in that microwave-sensitive minerals in the rocks heat up after being irradiated by microwaves, and a thermal stress difference is generated between the microwave-sensitive minerals and microwave-insensitive minerals
Implementation Method 2
Plasma rock breaking directly heats the rocks through the generated high-temperature plasma arc, and the rock mineral decomposition or thermal expansion reduces the strength of the rocks
Implementation Method 3
the rock mineral decomposition or thermal expansion reduces the strength of the rocks
Implementation Method 4
a water cooling device is mounted in a central hole of each microwave generator, and a top end of each water cooling device extends to an outer side of the microwave generator
Data Source
AI summary
The invention provides a microwave plasma adaptive rock breaking device for microwave-insensitive rocks and a using method thereof, and relates to the technical field of rock breaking. The microwave plasma adaptive rock breaking device comprises a microwave system, a microwave plasma conversion system and a cutter head system. The microwave system and the microwave plasma conversion system are mounted in the cutter head system, and the microwave system is connected with the microwave plasma conversion system. Under the premise that only a microwave source is used to supply energy, the combined action of ordinary microwave irradiation and plasma irradiation in the form of high-temperature flame is realized, and a full-section hard rock tunnel boring machine is in cooperation for breaking rocks, so that the problem of microwave-induced cracks of the microwave-insensitive rocks is solved, and the application scope of a microwave rock breaking technology is enlarged.