Expansion Shell

Rock bolt, in tunneling and underground mining, steel rod inserted in a hole drilled into the roof or walls of a rock formation to provide support to the roof or sides of the cavity.

The Underground expansion shell holds in any rock strata which is sufficiently competent to provide an adequate anchorage.

As the professional manufacture, we would like to provide you Underground Mining Roof Support Expansion Shell. And we will offer you the best after-sale service and timely delivery.

Expansion shell can provide prestressing to rock. It is very convenient and easy to install.