How does the mining face pass the old lane?

The old lane is the old roadway that was encountered in the past during the advancement of the working face. At the same coal seam, above or below others in the face of some old roadway and face. The brackets in the old lanes are affected by the long time and the pressure of the working face. The broken beams are more broken, the roof is broken, and it is easy to fall. Therefore, precautions need to be taken when the work surface passes through the old lane.

When the working face is approaching the old lane, first clean, repair, and reinforced the bracket in the old lane. Under the original bracket, put a beam and two columns or a beam and three columns of joist shed; if the old lane bracket has a partial fall, use crib pick the top; when slice mining, but also pre-laid metal or plastic mesh top.

When the roof of the old road is broken and the pressure is high, the working surface cannot be propelled in parallel with the old road. The direction of the working face should be gradually adjusted when approaching the old alley, so that the working face is oblique to the old alley. In this way, the old lanes occupy a small area in the working space, even if the roof of the old lane is broken and the pressure is large, it is easy to control. When the gun is mined, put a small cannon or a vibrating gun as much as possible to reduce the damage to the roof. The control roof area at the intersection of the working face and the old lane should increase the support density and add rafts.

If the old lane is above the working surface, use a long wooden beam top that is larger than the width of the old lane. The wooden beam stretches out the wall of the coal wall and puts it on the pillar. The long wooden beam is tightly tied with wood, and then it is lifted in the inclined direction. After the conveyor is moved, the raft is placed on the side of the gob.

When mining thick coal seams, the old lanes are mostly below the working surface. Before the old lane, it should be filled with vermiculite and coal. When the working surface is advanced to the old lane, the bottom plate is to be lowered with a long bottom beam, and the pillar is supported on the bottom beam to prevent the pillar from sinking. In the old alley, you should add a wooden raft top.

The working face passes through the old lane, and it is necessary to speed up the advancement to reduce the pressure on the roof and prevent the roof from falling.

Container Lock

Container Lock,Lock Container Head,Mobile Type Container Spreader,Container Truck Lock

XINGTAI BESTN IMPORT AND EXPORT TRADING COMPANY , https://www.xthechangaxle.com