Client Dilemma: Mining Bottleneck Due to Blasting Ban
An open-pit hematite mine in Chengde, Hebei faced a major challenge. Blasting with explosives was fully prohibited due to a local sports event. The hematite rock registers 5-6 on the Leeb hardness scale. Previously, the client relied on two hydraulic breakers, which only produced 300 cubic meters per day. This led to slow mining progress and high operating costs.
Tailored Solution: Custom CO₂ Rock breaking Technology
Our technical team analyzed the on-site rock photos provided by the client. We confirmed that despite high hardness, hematite will undergo brittle fracture under the expansion force of CO₂. We designed a targeted solution with a hole diameter of 140mm, hole spacing and row spacing of 2.5m, and hole depth of 6.5m. The client first tested 15 CO₂ fracturing pipes.
On-site Results: Soaring Efficiency & Repeat Order
The field test delivered outstanding results. 15 fracturing pipes fractured 4,000 tons of rock. The front rock blocks were evenly broken with no oversized lumps, and extended cracks formed on the rear rock for easy excavation by excavators. The working efficiency increased 10 times compared with hydraulic breakers. There were no flying rocks or loose stones, ensuring stable working faces and high safety. The client immediately placed a repeat order for another 30 pipes to fully adopt our solution.