Hydraulic hand-held scaling bar

Blasting is involved in underground mining, server excavations, manifolds o f hydropower producing facilities, as well as transportation tunnels. Regar dless of the final purpose, all are started as small size drifts, then prog ressively enlarged to the final size. Subsequent to the blast, workers must re-enter the blasted area to install the permanent rock support that makes the excavation serve its purpose. In doing so, their lives are endangered by the loose rock that remains on the walls and backs of the excavations af ter the blast. Depending on the size of an excavation, handheld scaling bar s and dedicated scalers are used to remove it lions will be possible. This alone will exclude the use of dedicated scalers that require a lot of room to operate, a separate access to the workplace, and storage-maintenance fac ilities where they are operating. Under these conditions, and when mining n arrow smaller and lower grade orebodies, hand-held scaling tools will remai n the only viable solution. Because of in cyclical use, it will have to be of the size and weight that can be handled by an average-size worker Portab le, hand-held scaling equipment requires no special excavation for access o r storage-maintenance facilities. Considering the above and assuming that hydraulically powered underground m ine equipment which has already replaced most pneumatic applications is her e to slay for the foreseeable future the authors have designed and produced a hand-held hydraulic scaling bar in an effort lo make the scaling process safer more productive and less time consuming.