Application Cases in Support of Mines with Complex Geological Conditions

2026/04/30

I. Project Background

During deep mine mining, the client encountered the dual challenges of extremely soft surrounding rock and high ground pressure: the surrounding rock of the tunnels was mainly mudstone and shale, which easily softened and disintegrated when exposed to water. Traditional anchor bolt support was prone to anchorage attenuation, large deformation of the surrounding rock, and even localized roof falls, severely restricting the tunnel excavation progress and underground operation safety.

To solve this problem, after comparing several international support brands, the company ultimately selected the slotted pipe anchor bolts from Jining Dongyanbo Mining Equipment Co., Ltd. as the core support solution for its deep mine tunnels.

II. Needs Assessment and Solution Customization

Our technical team conducted in-depth on-site assessments of the underground conditions, identifying the core pain points:

Geological Conditions: The uniaxial compressive strength of the surrounding rock is only 15-25 MPa, with dense joints and fissures, and a water swelling rate of up to 12%;

Construction Limitations: The underground space is narrow and humid, chemical anchoring agents are prone to failure, and the solution needs to be compatible with a rapid tunneling pace;

Performance Requirements: The solution must possess immediate load-bearing capacity, resistance to water softening, and long-term stability to ensure a roadway service life of ≥15 years.

Based on this, our company has customized a targeted solution:

Core Product: High-strength slotted pipe anchor bolts, made of corrosion-resistant alloy steel with a galvanized surface treatment;

Technical Principle: After the slotted pipe is anchored into the borehole using an impact hammer, the pipe expands and forms a mechanical interlock with the surrounding rock, achieving immediate anchoring without any chemical anchoring agents;

Supporting Optimization: Combined with our mining-grade metal mesh, it forms an "anchor bolt + mesh" combined support system, restraining loose rock fragments and preventing rockfalls and spalling;

Construction Guarantee: Providing a complete set of installation tools and on-site training, guiding workers to work efficiently in humid environments, controlling the installation time of a single anchor bolt to within 2.5 minutes.

III. Implementation Results and Customer Value

Following the implementation of the solution, a six-month follow-up monitoring period yielded results far exceeding expectations:

Maximum Safety Performance: Rock deformation was controlled within the design threshold, with no roof falls or spalling incidents, resulting in an 85% increase in the safety factor for underground operations.

Leap in Construction Efficiency: Compared to the original resin anchor bolt solution, the support construction speed increased by 50%, and the monthly tunnel excavation footage increased from 180m to 270m, significantly shortening the mine's commissioning cycle.

Continuously Reducing Costs: The product is water- and corrosion-resistant, eliminating the need for frequent anchor bolt replacements, reducing overall maintenance costs by 32%, resulting in a significant cost advantage throughout its entire lifecycle.

International Certification and Recognition: The product has passed ISO 6934-1 mine support material standard certification, meeting local safety supervision department requirements and receiving high praise from customers.

The client's mine director commented: "Dongyanbo slotted pipe anchors are a perfect fit for our mine with weak surrounding rock, solving the water softening problem that traditional support methods cannot overcome. It is the most reliable deep tunnel support solution we have ever seen."

IV. Conclusion

This case fully demonstrates the outstanding performance of Dongyanbo slotted pipe anchors in complex geological scenarios characterized by extremely weak rock, high humidity, and high ground pressure. With its core advantages of no chemical residue, immediate load-bearing capacity, and resistance to water and corrosion, this product has become the preferred solution for deep mine tunnel support overseas, providing safe, efficient, and economical sustainable support guarantees for mining clients worldwide.

Ankstesnis: Successful Implementation and Value Validation of Dongyanbo Slotted Pipe Anchor System in Mine with Fractured Surrounding Rock

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