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Physical Simulation Experiment on the Rock Breaking Efficiency of Pulse Type Controllable Shock Wave
Shubin Wang1, Shuo Zhang2, Liang Ma1
1Shenmu Ningtiaota Mining Company, Shaanxi Coal and Chemical Industry Group, Shenmu, Shaanxi 719300, China.
ACS Omega
|January 6, 2025
Summary
Controllable shock wave tests were conducted on various rock types to assess rock breaking efficiency. Optimal energy levels were identified for fracturing granite and cutting limestone, offering cost-effective mining solutions.
Area of Science:
- Geotechnical Engineering
- Mining Engineering
- Materials Science
Background:
- Controllable shock wave testing in situ for coal mine production is costly and disruptive.
- Developing efficient rock breaking methods is crucial for mining operations.
Purpose of the Study:
- To analyze the impact of energy storage on rock breaking efficiency using controllable shock waves.
- To evaluate the differential efficiency of shock waves on various rock types through physical simulation.
Main Methods:
- Conducted ground tests analyzing energy storage impact on rock breaking.
- Performed physical simulation experiments on high-strength cement, sandstone, granite, solid granite, and limestone.
- Investigated energy conversion using pulse power and metal wireExplosion.
Main Results:
- 50 kJ energy storage with specific metal wire parameters effective for high-strength cement.
- Sandstone samples showed excellent cracking with a single impact.
- 100 kJ energy storage verified effective for fracturing granite.
- Endoscopic exploration used for solid granite impact analysis.
- 100 kJ energy storage suitable for limestone roof cutting in coal seams.
Conclusions:
- Controllable shock wave technology shows promise for efficient rock breaking in mining.
- Specific energy levels and configurations are effective for different rock types.
- This method offers a potentially cost-effective alternative to in-situ testing.
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