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The tunnel’s “old buddy” deserves a break.
Release time:
2026-05-30
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Summary:
Anyone who’s worked in tunneling knows the dilemma: on one hand, the schedule is relentlessly tight; on the other, that “minefield” at the face of the tunnel is a real headache.
Every time after blasting, we have to wait for hazard clearance and ventilation. Just when it’s finally your turn, the old‑style carriage boom turns out to be too long and rigid—any slight deviation in the borehole angle means it can’t reach, forcing workers to erect scaffolding and use hand‑held rock drills to finish the holes. By the end of a shift, several people are lugging drilling rigs, laboring for ten or more hours amid dripping water and clouds of dust, with hole‑drilling accuracy relying entirely on their feel. When encountering weak surrounding rock, over‑excavation and under‑excavation become routine—and at month’s end, the volume of concrete used for backfilling often exceeds that of the lining itself, sending costs spiraling out of control.
Not to mention safety. When you’re working beneath the face of the tunnel, with small chunks of rock tumbling down from above now and then, your nerves are constantly on edge. The boss keeps shouting “Safety first” every day, but the aging equipment just doesn’t give you that kind of confidence.
It wasn’t until our construction site introduced the Zhengxun Heavy Industry’s hyperbolic-arm rock‑drilling rig that we finally found a real solution to these long‑standing, nagging problems.
To be honest, when I first laid eyes on this device, it didn’t strike me as particularly impressive. But once I started using it, I quickly realized that the real magic lies in its “hyperbolic arm.”
This is far more than just an extra boom section. The designers at Zhengxun Heavy Industry clearly understand the job site: where a standard carriage can’t reach, this machine pivots with wrist‑like dexterity, expanding its drilling coverage by nearly a full circle compared to similar equipment. Whether it’s the tunnel crown, the side walls, or those awkward corners, the blast‑hole angles are spot‑on. Our on‑site measurements show that the peripheral hole deviation is tightly controlled, the blasted face is as smooth as if cut by a knife, and overbreak has been reduced by more than ten centimeters. Just in terms of lining concrete alone, the cost savings per kilometer would be enough to buy a nice car. 
Drilling accuracy has improved, and workers no longer have to climb scaffolding or take unnecessary risks. With a remote control in hand, operators can perform tasks from a distance, effectively eliminating safety hazards in high‑altitude areas. In the past, an eight‑person crew would sweat profusely; now, two or three workers can handle the job with ease, and drilling time has been cut by 30 percent. Our colleagues have transitioned from “drillers” to “operators”—when they finish work, they’re clean and dry. That’s the true dignity of engineering.
What gives us the greatest peace of mind is Zhengxun Heavy Industry’s unwavering commitment to safety. The entire product line comes standard with an environmental‑monitoring and gas‑detection automation module, significantly boosting both operational efficiency and overall safety. Now, the boss no longer has to call at night to ask, “Is everything all right today?”—because this equipment itself keeps potential risks at bay.
After twenty years in tunneling, I’ve come to realize one thing: it’s not that the workers aren’t putting in their best effort—it’s that the equipment just isn’t up to the task.
This double‑arm rock‑drilling rig from Zhengxun Heavy Industry doesn’t flaunt its capabilities or boast—it simply and reliably addresses your concerns about precision, efficiency, and safety. It shows us that in modern tunnel construction, competitiveness lies not in sheer manpower but in every millimeter of precise drilling.
If you’ve had enough of the endless back-and-forth with re‑blasting, over‑excavation, and safety remediation, give this a try. It’s time for your trusty old workhorse to take a break—this Zhengxun Heavy Industry double‑curved‑arm rock‑drilling rig is the real partner that’ll stand by your side through the toughest jobs for the next decade.
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Changsha Base:Hunan Zenxon Heavy Industry Technology Co., Ltd.
Address: Jinrong Tongxin International Industrial Park, Changsha High-tech Zone
Loudi Base:Hunan Haoda Heavy Industry Technology Co., Ltd.
Address: Loudi Avenue, Loudi High-tech Industrial Development Zone, Lianyuan City, Loudi City, Hunan Province
Telephone:400-186-0868
E-mail:3804246750@qq.com
E-mail:19967177733@163.com
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