Integral reinforcement method for hanging wall broken surrounding rock long anchor cables

Abstract

The invention relates to a mining reinforcement technique, and discloses an integral reinforcement method for hanging wall broken surrounding rock long anchor cables. The integral reinforcement method comprises the following steps of (S1) tunneling a hanging wall broken surrounding rock zone along a rock drilling cross roadway or a chamber on the lower part of each sublevel ore body so as to dig an out-of-vein roadway, and pulling open towards both sides so as to form an out-of-vein chamber; (S2) performing roof control on the out-of-vein chamber; (S3) drilling anchor cable drill holes downwards row by row in the out-of-vein chamber in the ore body trend, wherein the anchor cable drill holes extend into the boundary of the hanging wall ore body by 1 to 2 m; (S4) arranging a stiffening beam along each column of the anchor cable drill holes, penetrating one end of a long anchor cable into the corresponding anchor cable drill hole, and fixedly connecting the other end of the long anchor cable with the stiffening beam; and (S5) grouting the anchor cable drill holes after all the long anchor cables are installed. According to the integral reinforcement method, the hanging wall surrounding rock can be effectively reinforced, so that the safety and stability in mining are guaranteed.

Description

technical field [0001] The invention relates to mine mining reinforcement technology, in particular to a method for integral reinforcement of long anchor cables for broken surrounding rock on the hanging wall. Background technique [0002] The segmental mining method maintains the stability of the stope through the ore rock and the pillars left, and is suitable for the mining of ore bodies with stable surrounding rocks; Scale of the broken zone. Therefore, in the process of exposing the broken zone on the upper wall and under the influence of blasting operations, it is very easy to induce large-scale collapse of the broken zone, which is not conducive to safe production, and will also lead to a high rate of ore loss and dilution. [0003] Medium-thick ore bodies with sloping and broken surrounding rocks are common in metal mines. Due to the unstable hanging wall surrounding rocks, it is difficult to guarantee the safety of the stope during mining. The mining of the hanging ...

AI Technical Summary

Problems solved by technology

In recent years, with the popularization of methods such as medium and deep hole segmental mining methods, the exposed surface of the hanging wall has also increased. bring great difficulty

Under such working conditions, the surrounding rock of the hanging wall is often reinforced by methods such as vertical stabilization of the hanging wall rock layer of the inclined ore body, and reinforcement of the surrounding rock concrete retaining wall of the hanging wall. Support reinforcement, and when mining the hanging wall ore body, part of the hanging wall surrounding rock will collapse, resulting in ore loss and ore dilution, and the support reliability is also poor

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