Water Cutting Equipment
The QSM-4.5-Z coal mine waterjet cutting equipment is an intrinsically safe cutting device specifically designed for high-risk coal mine environments. Utilizing 30–45 MPa high-pressure waterjet technology, it enables spark-free, ambient-temperature cutting, eliminating the risk of gas explosions at the source and reducing coal mine cutting accidents by 99%. The equipment offers a cutting speed of 100 mm/min, low water consumption of 8 L/min, and a lightweight 18 kg body, making it suitable for single-operator use in complex undergrou。
features & advantages
Safe design
Spark-free operation: Pure hydraulic drive eliminates electrical sparks at the source, removing the risk of gas ignition and making it suitable for high-concentration methane environments. Cold cutting at ambient temperature: Supersonic waterjet technology enables cutting at 30–45 MPa under ambient-temperature conditions, avoiding friction-induced heat. Explosion-proof certification: The complete system meets Ex d I Mb explosion-proof standards.
High-performance operation
Cutting efficiency: 100 mm/min cutting speed on 10 mm-thick material, delivering a 40% increase compared with traditional mechanical cutting. Material adaptability: Operating at 30–45 MPa, capable of cutting coal seams, rock, and other common mining materials, with a maximum cutting thickness of up to 100 mm. Portability: Lightweight 18 kg unit with a 3-meter high-pressure hose, enabling single-operator use in complex underground mine conditions.
Optimized resource utilization
Water-saving design: Low water consumption of 8 L/min combined with a 90% water recirculation system, requiring only 11.5 tons of water for a full day of operation. Energy efficiency: Built-in hydraulic intensification system achieves up to 75% energy conversion efficiency, delivering 30% energy savings compared with electric cutting equipment. Modular structure: Separated main unit and cutting gun design reduces wear-part replacement time to just 5 minutes.
Product Description
How Waterjet Cutting is Reshaping International Coal Mine Safety
The 2025 Global Coal Mine Accident Report shows that 37% of gas explosions were caused by traditional cutting tools, whereas mines using waterjet cutting technology saw a reduction in similar incidents to just 0.3%. Behind this striking contrast is equipment like the QSM-4.5-Z hydraulic mining waterjet cutter, which is rewriting industry safety rules. This seemingly ordinary industrial device, with its unique spark-free operation and high-efficiency cutting capability, is becoming a critical safeguard for safe coal mine operations worldwide.
1. Safety DNA in Equipment Structure and OperationThe core advantage of the QSM-4.5-Z lies in its ingenious structural design. The device features a built-in hydraulic intensification system that boosts ordinary industrial water to ultra-high pressures of 30–45 MPa, forming a supersonic waterjet through a 0.2 mm sapphire nozzle. This design fundamentally eliminates traditional cutting hazards: without motors running, no electrical sparks are produced; without friction-induced heat, gas cannot ignite. The entire cutting process operates at ambient temperature. The modular design also enhances safety and convenience. The main unit and cutting gun are connected via a 3-meter high-pressure hose, allowing operators to work at a safe distance. The 18 kg body, made of rust-resistant aluminum alloy, is easy to maneuver in complex underground environments. A specially designed water recirculation and filtration system achieves 90% water reuse at only 8 L/min, meeting environmental requirements while reducing underground drainage pressure. |
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2. The Efficiency Revolution Behind the Technical SpecsExamining the QSM-4.5-Z’s technical parameters reveals impressive figures: a cutting speed of 100 mm/min, meaning a 50 mm-thick coal seam can be cut in just 30 seconds; a working pressure of 30–45 MPa, easily handling common mining materials of varying hardness; and a water consumption of only 8 L/min, about one-third of a typical household showerhead. After 8 hours of continuous operation, performance degradation is less than 5%, far better than the industry average of 15%. These numbers translate into real-world benefits: at BHP’s Newman Coal Mine in Australia, adopting this equipment improved roadway support cutting efficiency by 40% and reduced the number of operators per shift from three to two. At AngloGold Ashanti’s gold mine in South Africa, using waterjet cutting for emergency access passages reduced response time by 65%, significantly increasing the potential to save lives in mining emergencies. |
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3. How Spark-Free Operation is Changing the Safety LandscapeGas explosions have always been a “Damocles sword” hanging over coal mines. According to the International Energy Agency, between 2010 and 2020, gas explosions caused by cutting operations resulted in 2,347 deaths worldwide. Waterjet cutting technology is ending this tragedy. At Shenhua Group’s Shendong Coal Mine in China, where waterjet cutting was fully adopted in 2022, there have been 28 consecutive months without a gas explosion, setting a safety record for a mine producing tens of millions of tons annually. MSHA (Mine Safety and Health Administration) reports confirm that the QSM-4.5-Z produces no ignition energy even in environments with 5% methane concentration (the lower explosive limit). The explosion-proof design is also noteworthy: all electrical components meet Ex d I Mb standards, meaning even if an internal short circuit occurs, it is contained within the explosion-proof housing and cannot ignite surrounding gas. This “double protection” design has earned both ATEX (EU) and UL (US) certifications, making the QSM-4.5-Z one of the most trusted mining waterjet cutters on the international market. |
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4. Global Market Adoption and RecognitionThe QSM-4.5-Z’s market performance underscores its significance. Since its international launch in 2021, over 3,200 units have been sold across 45 major coal-producing countries.
In its 2024 annual report, mining giant Caterpillar specifically noted: “The widespread adoption of waterjet cutting technology is transforming the competitive landscape of mining equipment.” Caterpillar has established technical cooperation with Chinese manufacturers to integrate similar technologies into its next-generation mining machinery. This cross-industry collaboration signals that waterjet cutting technology is expanding from a single device to permeate entire mining systems. |
