Key Heavy-Duty Equipment For Tunneling Operations
The Evolution of Air Leg Rock Drills in Modern Tunnel Construction
Extreme Geological Adaptability
S82 air leg rock drills provide unmatched penetration dynamics across mixed strata, fractured granite, and hard quartz rock where automated drill jumbos face mobility constraints.
Optimal Pneumatic Energy Ratio
Engineered with a streamlined air distribution mechanism, reducing volumetric air consumption while delivering 20% higher percussive frequency and rock shattering torque.
Operational Safety & Longevity
Equipped with high-alloy forged cylinders, centralized control handles, and dampening springs to mitigate operator fatigue and endure high-abrasion underground dust.
1. Commercial and Industrial Landscape in Global Tunnel Construction
Tunnel construction has experienced unprecedented growth worldwide driven by the aggressive expansion of high-speed rail corridors, trans-mountain highways, underground hydroelectric waterways, and deep urban utility networks. Within this demanding infrastructure boom, the choice of rock excavation equipment determines project profitability, safety milestones, and engineering schedules. While mechanized Tunnel Boring Machines (TBMs) dominate mega-bore flat-plane projects, the drill-and-blast method utilizing high-frequency air leg rock drills like the S82 Air Leg Rock Drill remains irreplaceable across flexible cross-sections, complex mountain terrains, and specialized heading headings.
The global tunneling market demands machinery that balances rapid cycle times, minimal capital expenditure, and robust tolerance for punishing conditions. In sub-surface environments prone to groundwater ingress, variable rock mass ratings (RMR), and structural fault zones, heavy crawler rigs often encounter severe maneuverability limitations. Hand-supported and air-leg-mounted pneumatic rock drills represent an agile, high-thrust solution capable of initiating blast holes, rock-bolt holes, drainage relief channels, and profile trimming with minimal downtime.
2. Deep Dive: Engineering Dynamics of the S82 Rock Drill in Tunnel Heading
The S82 Air Leg Rock Drill is engineered specifically for heavy-duty underground rock drilling. Operating under the percussive-rotary pneumatic principle, the tool integrates an optimized piston stroke mechanism that maximizes kinetic energy transfer to the carbide drill bit. As compressed air cycles through the precision-ground valve group, the piston strikes the drill rod shank at frequencies exceeding 2,100 impacts per minute. Simultaneously, the robust rifle bar and ratchet wheel assembly impart positive rotation torque, crushing tough rock minerals while preventing drill steel sticking.
Crucial to tunnel construction is the air leg support cylinder (such as the FT160 or FT170 series). The air leg functions not merely as a mechanical stabilizer but as an automated thrust regulator. By maintaining consistent axial feed pressure against the rock face, the air leg eliminates manual pushing forces, counteracts recoil vibrations, and ensures uniform hole straightness. This straightness is critical during smooth blasting procedures, directly preventing over-break and under-break along the tunnel arch crown and sidewalls.
3. Specialized Application Scenarios in Modern Subterranean Civil Works
Top Heading and Bench Excavation: In medium to large tunnel cross-sections excavated via the New Austrian Tunneling Method (NATM), S82 drills are deployed across multi-tier mobile jumbo scaffolding. Drilling crews drill horizontal blast patterns with high precision, completing cut holes, easers, and contour holes in dense volcanic or sedimentary formations within tight cycle windows.
Systematic Radial Rock Bolting & Reinforcement: Immediate ground support is vital to prevent rockfall in weak roof strata. The high torque output of the S82 allows drilling of upward and inclined anchor holes up to 4 meters deep for resin bolts, friction stabilizers (split sets), and self-drilling anchor rods, ensuring immediate bonding with the rock matrix.
Culverts, Drainage Shafts, and Grouting Bores: When managing high water inflow zones inside tunnels, horizontal advance drainage holes must be drilled ahead of the excavation face. S82 units excel at deep-hole drilling with water flushing attachments that suppress silica dust and clear rock slurry rapidly from the borehole.
4. Technological Advancements and Sustainability Trends in Pneumatic Tools
The pneumatic tool sector is undergoing rapid modernization driven by metallurgical advancements, digital manufacturing, and ergonomics. High-end alloy steels such as 20CrNiMo and vacuum carburizing processes ensure that critical wear components—including cylinders, rifle nuts, and front heads—withstand millions of cyclic impacts without fatigue spalling. Furthermore, modern air leg drills incorporate low-noise mufflers and multi-point lubrication oil mist systems, reducing environmental noise pollution and lowering oil mist exposure for tunnel miners.
TS11 Pneumatic Breaker Light Duty Mining Jack Hammer for Tunnel & Quarry Rock Breaking
Short Description:
SHENLI TS11 pneumatic pick is a professional light duty pneumatic breaker with application range similar to TCD20. Designed mainly for mining, tunnel trimming, and quarry rock breaking, this jack hammer delivers stable performance and lower operation costs with complete spare parts support and flexible packaging options.
We solve the core overseas customer concern of spare parts shortage and delayed replacement. We provide full set original accessories for this pneumatic breaker including chisels, pistons, valve assemblies, return springs, sealing rings, and positioning pins. All wearing parts are sufficiently stocked all year round.
All accessories adopt unified standard specifications with strong universality and interchangeability. Customers can purchase single parts or complete wearing part sets without minimum order limit for accessories. Fast independent accessory delivery ensures quick on-site equipment maintenance and avoids construction shutdown losses.
Product Description & Comprehensive Engineering Scope
The TS11 Pneumatic Pick is a robust handheld air demolition tool engineered for heavy-load breaking jobs. Widely adopted in construction, mining, tunnel development, and road maintenance sectors, this air pick delivers powerful impact force with stable pneumatic performance.
Built with high-strength alloy steel body, TS11 pneumatic pick resists wear under continuous working conditions. Compact body design allows easy operation in narrow working spaces. It is compatible with standard pneumatic chisels, easy for daily maintenance and spare-part replacement.
High-Impact Demolition Features:
- High impact power, efficient for concrete, rock, asphalt breaking
- Heavy-duty alloy housing, long service life
- Stable air power output, low failure rate
- Light-weight handheld structure, convenient field operation
- Easy disassembly, simple maintenance
Tunnel & Structural Utility:
- Overbreak trimming on tunnel crowns & inverted arches
- Excavation of emergency refuge niches & drainage ditches
- Secondary fragmentation of large blasted boulders
- Precision demolition around utility ducts & rebar meshes
Main Parameters of Air Pick & Rock Breaker Products
| Parameter / Name | TCA-7 | TCD-20 | TS11 | TPB-40 | TPB-60 | TPB-90 |
|---|---|---|---|---|---|---|
| Piston Diameter | 35 mm | 42.85 mm | 38 mm | 44 mm | 57.15 mm | 66.67 mm |
| Piston Stroke | 120 mm | 60 mm | 135 mm | 146 mm | 100 mm | 152 mm |
| Percussive Frequency | 1250 B.P.M | 2000 B.P.M | 1630 B.P.M | 1050 B.P.M | 1400 B.P.M | 1400 B.P.M |
| Net Weight (N.W) | 7.2 kg | 10 kg | 10.1 kg | 18 kg | 30 kg | 42 kg |
| Total Length | 465 mm | 520 mm | 600 mm | 660 mm | 645 mm | 723 mm |
| Air Consumption | 1.0 m³/min | 1.1 m³/min | 19 L/S | 1.6 m³/min | 2.0 m³/min | 2.2 m³/min |
| Tracheal Diameter (Inlet) | 19 mm | 19 mm | Inlet 12 mm | 19 mm | 19 mm | 19 mm |
| Bit Head Size | R26*80 | R26*80 | R22*82.5 | R25*108 | R32*152 | R32*152 |
Working Application Scenarios
1. Municipal Road Maintenance Works
Used for breaking damaged asphalt roads, cracked concrete pavement, old road curbs and road base residues. It is the main tool for daily road rush repair and road renovation projects, fast breaking and high efficiency.
2. Building Renovation & Demolition
Suitable for indoor and outdoor partial demolition of old buildings, breaking concrete walls, floor slabs and building foundations. Flexible operation in narrow spaces where large machinery cannot work.
3. Open-pit Mining & Quarry Works
Used for trimming rock faces, breaking loose ore blocks, cleaning piled rock waste and secondary crushing of large rocks, ensuring smooth mining operation and high throughput.
4. Tunnel & Civil Engineering Works
Auxiliary breaking and trimming inside the tunnel, removing protruding rock bodies, leveling foundation rock, and ensuring clearance gauge accuracy and structural safety.
Factory Tour & Advanced Production Engineering
Raw materials: All materials are sourced from domestic and international well-known suppliers, and the quality is free from any flaws.
Processing: We have all precision machining production lines, including high-precision CNC lathes, and multi-axis CNC milling machines. Machine tools are from well-known brands, and online quality assurance is performed at every step.
Heat treatment: All heat treatment activities are carried out in a sealed quench furnace with facilities including but not limited to carburizing, nitriding, volume quenching, annealing, and tempering.
Grind: We have world-class grinding equipment that is capable of maintaining dimensions to within 3 microns. The grinding line includes state-of-the-art equipment including universal CNC grinding machines, cylindrical CNC grinding machines with process gauges, CNC internal diameter grinding machines, and universal CNC grinding machines.
Surface treatment: We offer a range of surface treatment options painting and other processes. These processes increase the service life of the tools and provide them with an appearance that meets the customer's requirements.
Assembly & Commissioning: Assembly and testing are carried out by our dedicated team on custom-built assembly platforms and test machines. Each assembled rock drill is tested for torque, BPM, and air consumption. After successful testing, each machine receives a test certificate to ensure its quality.
Quality Control & International Certifications
Strict Quality Standards:
1. Customer satisfaction is achieved through the provision of 'zero defect' products and timely delivery.
2. Ensuring an orderly programme and full traceability across every manufacturing step.
3. Increased production efficiency through the latest technology and automated testing equipment.
4. The company provides regular training to its employees in accordance with defined objectives, training needs and engineering requirements.
Shenli is ISO 9001:2015 certified. We strive to constantly monitor and improve our processes to ensure the highest quality products. Experienced quality inspectors use a variety of precision instruments and special gauges to test the dimensional and functional performance of all components.
ISO 9001:2015 Certified
CE Marking - Air Picks
CE Marking - Rock Drills
IP Compliance Certificate
Compliance Note: CE certification is a mandatory conformity mark for certain products sold within the European Economic Area (EEA). CE stands for "Conformité Européenne" which translates to "European Conformity." The CE mark certifies that a product has met EU consumer safety, health or environmental requirements. CE certification also allows manufacturers to freely circulate their products within the EEA. ISO 9001:2015 is an international quality management system (QMS) standard that outlines requirements for a quality management system. Our factory has been ISO 9001:2015 certified since 2015, and all of our products are CE certified.
Global Tunnel & Mining Construction Cases
Dutch Clients
The Dutch customer came to our factory and was satisfied with the production equipment, raw materials as well as advanced processes that we have in place. The client then signed a custom order for 500 units after being shown all of these great things about what is possible here at this facility! They look forward to sustainable long-term cooperation.
U.S. Customers
The American customer visits our factory and has an in-depth negotiation to reach a long-term cooperation relationship for ongoing heavy infrastructure, tunnel development, and municipal quarry projects across North America.
Japanese Customers
The Japanese customer was very satisfied with the factory equipment and production process. He also proposed that they work together on design, which would give them an edge over their competitors who do not have this partnership!
India Customers
We are delighted that Indian customers have visited our factory to learn more about ISO 9001 certification, which opens up new opportunities for us to collaborate. We explained in detail which parts go to which products, and how many different assembly lines there are. We maintain an active cooperative relationship.
Company Profile & Enterprise Vision
SHENLI is a leading supplier of superior pneumatic tools for the construction, mining and industrial markets. Since 2005, the Shenli brand has been synonymous with quality and innovation.
For over a decade, the SHENLI brand has represented performance, innovation and quality in the pneumatic tool industry. The SHENLI product line now offers a complete line of pneumatic tools, a wholly owned factory, pneumatic tools and a full line of accessories. With superior product performance, as well as superior product and reliability, competitive pricing for factory direct sellers, exceptionally ergonomically designed tools and quality warranty terms, Shenli has become an industry leader.
We take every customer's problem seriously so that we can solve our common problems, and choosing Shenli is just the beginning for you. SHENLI will provide reliable service and support through every step of the process from product consultation to final delivery.
"Striving to be a world-class supplier of rock drill tools."
Corporate Culture & Mission
- More Attentive: Work together, keep improving
- More Focused: With sincerity, you can achieve anything
- More Thoughtful: Customer first, service first
- Dare to Innovate: Keeping up with the times and forging ahead
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