The Weishi EBH340 heavy-duty cantilever roadheader, as Weishi Heavy Industry's flagship horizontal axis hard rock tunneling equipment, is specifically designed for tackling challenging conditions in deep wells with large cross-sections and high-density, ultra-hard rock tunnels. It directly addresses industry pain points such as high wear and tear on cutting tools, severe machine vibration, and poor tunnel formation. The machine features a 140-ton heavy-duty frame paired with a powerful 540kW power system and a patented horizontal axis cutting head, capable of conquering hard rock strata with compressive strength ≤130MPa, achieving a maximum cutting area of ​​45㎡, truly realizing one-time formation of large-section tunnels. It is the ultimate solution for tunneling large-section tunnels in ultra-hard rock.

The Weishi EBZ230A heavy-duty cantilever roadheader is a high-performance, cost-effective machine suitable for medium-hard rock roadways up to 85MPa. It is specifically optimized for addressing on-site challenges in small and medium-sized mine roadways, hard rock cutterheads in development roadways, cantilever leakage, poor roadway slope, and easy blockage by gangue. With its robust 80-ton self-weight, it meets the rigidity standards of the 260-type roadheaders on the market, setting a high-performance benchmark for medium-sized hard rock roadway excavation. The machine features a 362kW dual-motor drive system, including a 230kW cutting motor, enabling efficient operation in full-rock and semi-coal-rock roadways with compressive strength ≤85MPa. It has a maximum cutting area of ​​28.8㎡, perfectly meeting the cross-sectional requirements of mainstream mines.

The Weishi EBZ230S heavy-duty cantilever roadheader is specifically designed for small-section, high-hardness rock formations in coal mines. Despite its compact 75-ton body, it delivers uncompromised core performance, making it a professional solution for tunneling in narrow, hard rock tunnels. With a powerful 362kW engine, it can efficiently tackle hard rock with compressive strength ≤85MPa, achieving a maximum cutting area of ​​21.6㎡, demonstrating exceptional performance in confined spaces.

The Weishi EBZ260H heavy-duty cantilever roadheader is specifically designed for medium-to-high hardness, large-section roadways in coal mines. With a self-weight of 90 tons, it surpasses conventional 260-type roadheaders on the market in terms of robust construction and 420kW dual-motor drive, exceeding the power and load-bearing capacity of comparable products. The 260kW high-power cutting motor can efficiently tackle hard rock with compressive strength ≤90MPa, achieving one-time roadway forming of up to 30㎡. All wear-resistant components have been comprehensively upgraded, significantly reducing the frequency of consumable replacements. It supports remote viewing of operating data via mobile phone and can be upgraded with an intelligent tunneling system. Multiple customized accessories adapt to various roadways, allowing one machine to cover multiple mining faces, resulting in high equipment reuse and balancing tunneling capacity, maintenance costs, and long-term intelligent upgrade needs.

The Weishi EBZ260L heavy-duty cantilever roadheader, a pioneer in low-profile tunneling, is a specialized upgrade for tunneling equipment designed for low-profile roadways. The entire machine is deeply optimized to address industry pain points such as insufficient lifting capacity, limited cutting range, and the risk of roof snag due to excessive height in low-profile roadways. It is suitable for full-rock and semi-coal-rock roadways with compressive strength ≤90MPa. The machine features a lightweight 83-ton body, powered by dual 420kW motors, and a cutting head height of only 2150mm, allowing for interference-free operation in low-profile spaces. It can form a cross-section of 14.4–26.4㎡ in a single pass.

Compact and Powerful in Hard Rock, Big Impact in Small Sections

The VIS EBZ260S heavy-duty cantilever roadheader is a compact tunneling machine specifically designed for small-section hard rock tunnels. It directly addresses the pain points of underground construction, such as difficulty turning in narrow tunnels, limited operation in confined spaces, high wear and tear on hard rock cutting teeth, and easy slippage on the floor. With a compact 85-ton body, it achieves a 90MPa hard rock crushing capacity, making it the performance king for small-section hard rock tunnel excavation. The machine's 392kW power system and maximum cutting area of ​​28.8㎡ unleash powerful tunneling potential in confined spaces.

The King of Hard Rock (100 MPa), the Mainstay of Medium and Large Mines

The Weishi EBZ280A heavy-duty cantilever roadheader, a flagship model for hard rock mining launched in 2022, is designed to meet the four core needs of domestic small and medium-sized coal mines: mining conditions of medium-hard rock up to 100 MPa, mine budget control, multi-face rotation construction, and high wear and tear on vulnerable parts. We have created the EBZ280A, an economical and standardized roadheader, filling the market gap where smaller models have weak rock-breaking capabilities and larger models have excessively high procurement costs. The machine adopts a 440kW balanced power solution, a lightweight 98-ton body, and 0.155MPa ultra-low pressure tracks, balancing convenient underground transport and the ability to traverse muddy floors. It covers multiple cutting heights from 3.2 to 5.2 meters and can be adapted to various working faces, including roadways and development roadways, reducing the cost of idle equipment in mines. It is a high-performance, cost-effective main roadheader solution for medium-hardness rock formations.

The VIS EBZ280D heavy-duty cantilever roadheader is specifically designed for hard rock construction in steep underground coal mine tunnels, boasting an industry-leading climbing ability of -25° to +23°. Its 110-ton heavy-duty chassis is equipped with a powerful 480kW motor, and a 280kW cutting motor capable of handling hard rock pressure ≤100MPa. A full set of specialized reinforcements for steep slopes enables efficient and routine tunneling in previously difficult steep hard rock tunnels, making steep-angle development roadway construction in mines no longer a challenge.

Cutting power: 230 kW

Number of bolting rigs: 4

Maximum cutting area: 26.4 m²

Specified rock strength: ≤85 MPa

Machine weight: 95 t

Maximum drilling depth: 18 m

Cutting motor power: 280 kW

Number of bolting rigs: 2

Maximum cutting area: 33.8 m²

Specified rock strength: Up to 100 MPa

Machine weight: 115 t

Maximum drilling depth: 15 m

The roadheader cutting arm is a core actuating component of the cantilever roadheader. It is primarily responsible for the three key tasks of coal cutting, rock breaking, and coal loading, directly determining the machine's overall cutting efficiency, operational stability, and maintenance frequency. Operating under harsh conditions characterized by heavy-load impacts, abrasive coal dust, water seepage, and oil contamination, the cutting arm’s internal gear transmission system and floating seal structure demand extremely high manufacturing precision and assembly standards.

The 280 cutting gearbox is a high-power, heavy-duty mining gearbox designed for cutting motors with power ratings up to 280 kW. It is specifically engineered for the cutting units of boom-type roadheaders, shearers, and continuous miners. Utilizing a parallel-shaft/planetary gear transmission configuration, this model features a high gear ratio, high output torque, robust overload capacity, and high reliability. It ensures stable operation of the cutting drum for coal and rock breaking under complex working conditions, including hard rock, mixed coal-rock, and pure coal seams.

Roadheader picks—commonly referred to as the "teeth" of the machine—are installed in the bit holders of the cutting head. They are the core consumable components responsible for directly breaking down coal and rock in EBZ-series boom-type roadheaders. Mainstream models include S135 (U135) and S47 (U47).