The role of the new shotcrete machine to support the surrounding rocks is worthy of attention, and its main purpose is to transform a certain thickness of surrounding rocks into a self-supporting arch, and then effectively stabilize the surrounding rocks. If the rock mass is relatively broken, you can also use the wire mesh to pull the small rock blocks between the blocking bolts to strengthen the concrete spraying layer and assist the spraying anchor support. Therefore, according to the pz-7 type shotcrete machine's increasing effect, interlocking effect, reconciliation effect.
First, increase the role: After the roadway is opened, the shotcrete support will be carried out in time. The reason is to fill the unevenness on the surrounding rock surface to eliminate the stress concentration caused by the non-evaluation of the rock surface and avoid the damage of the surrounding rock caused by excessive stress concentration.
Interlocking effect: This action is to bond together the rock blocks divided by fractures. If a piece of live rock in a surrounding rock slips and falls, it will cause the interlocking reaction of adjacent rock blocks, which will lose stability in succession, resulting in a large-scale roof fall Or tablets.
If shotcrete support can be carried out in time after the lane is opened, the adhesive force and shear strength of shotcrete support can resist the local damage of surrounding rocks, prevent individual rocks from slipping and falling, thereby maintaining Rock stability.
Third, the reconciliation effect: The function is to form a complex of surrounding rock and support to support the surrounding rock together. It can combine the stability of high surrounding rock and its own supporting ability to form a co-working mechanical system.The problem of the weak point of the negative bearing of the stent is solved.
