A method for evaluating grouting effect of polymer grouting material and grouting material

Abstract

The invention discloses a method for evaluating the grouting effect of polymer grouting materials and the grouting material. The method mainly uses cement grouting materials with relatively mature grouting parameters as a comparison, and by comparing the filling rate, a polymer grouting material is selected. Grouting parameters of the material. The provided polymer grouting material includes two components, A and B. Component A consists of isocyanate, foaming agent, foam stabilizer, antistatic agent and epoxy resin and epoxy resin prepolymer diluent; component B It is composed of phosphoric acid, citric acid, polyol, water-soluble trihydroxy polyether, curing agent, flame retardant and plasticizer. The evaluation method of the present invention can optimize the grouting parameters, shorten the grouting time, save the grouting material, and the filling effect is good in the bolt construction process. Apply high preload to improve the support strength of surrounding rock.

Description

technical field [0001] The invention relates to the technical field of coal mines, in particular to a method for detecting the grouting effect of a polymer grouting material. Background technique [0002] As the mining goes deeper, the surrounding rock pressure of the roadway also increases. Conventional support methods cannot effectively control the weak and broken roadway with surrounding rock, which affects the stability and safety of the roadway. The grouting bolt (cable) integrates anchoring support technology and grouting reinforcement technology, which greatly improves the strength and self-supporting capacity of the surrounding rock, can effectively control the weak surrounding rock, and maintain the stability of the roadway. However, there are the following defects after grouting: one is that the conventional anchor (cable) grouting has the problems of long construction time, low strength and gaps after grouting, which cannot effectively reinforce the broken surroun...

AI Technical Summary

Problems solved by technology

However, there are the following defects after grouting: one is that the conventional anchor (cable) grouting has the problems of long construction time, low strength and gaps after grouting, which cannot effectively reinforce the broken surrounding rock; (cable) grouting support, there are cracks between the anchoring agent and the surrounding broken rock, the anchoring force cannot be guaranteed, and the mechanical properties of the anchor (cable) cannot be fully utilized; the third is to use the conventional anchor (cable) after grouting, After the slurry is injected into the surrounding rock, the phenomenon of slurry leakage is prone to occur, and the broken surrounding rock cannot be effectively supported

Polymer grouting materials can effectively support surrounding rock, but for emerging materials, because there is no reference value for grouting parameters, mine operators lack operational basis, so they can only blindly set grouting parameters according to their own experience, and cannot guarantee the choice Whether the grouting parameters meet the support requirements

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