Method for analyzing reinforcing effect of fibers on compression toughness of tailing cemented filling body

Abstract

The invention relates to a method for analyzing the effect of enhancing the compression toughness of a tailing cemented filling body by fibers, which comprises the following steps of: manufacturing a non-fiber tailing cemented filling body test piece and different fiber tailing cemented filling body test pieces, respectively carrying out uniaxial compression tests, and respectively drawing load-displacement curves; defining a compression toughness index according to the ratio of the area enclosed by the curve and the horizontal axis under the limit load to the area enclosed by the curve and the horizontal axis under the peak load, and calculating the compression toughness index of the tailing cemented filling body test piece; and respectively calculating the ratio of the load of the fiber tailing cemented filling body test piece to the load of the control group to obtain the compressive toughness percentage enhancement effect. According to the method, the post-peak bearing ductility characteristic of the tailing cemented filling body can be fully represented, the reinforcing effect of different fibers on the compression toughness of the tailing cemented filling body can be rapidly and accurately analyzed, a theoretical basis is provided for adopting a proper filling body for a metal mine and guaranteeing the engineering safety of the tailing filling body, and meanwhile the utilization rate of metal mine tailings is increased.

Description

technical field [0001] The invention belongs to the field of processing methods for tailings left over from metal mines, and particularly relates to a method for analyzing the compressive toughness enhancement effect of fibers on a tailings cemented filling body. Background technique [0002] The tailings left by metal mining will pollute the environment. The tailings cemented filling method can not only achieve green mining but also improve the utilization rate of mineral resources. It is the mining method of choice for mines. The essential. Admixtures are a common method to strengthen the tailings cemented backfill. For example, adding man-made fibers to the tailings cemented backfill can solve the defects of the tailings cemented backfill, such as brittleness and easy cracking, and improve its practicability. Study the types and contents of different fibers. , length and other parameters on the reinforcement effect of the tailings cemented backfill, and obtained the best...

AI Technical Summary

Problems solved by technology

[0003] However, neither the flexural toughness used to characterize the toughness enhancement effect of different fibers on the tailings cemented filling body nor the definition of the compression toughness of fiber-reinforced concrete can objectively characterize the compressive toughness of the fiber to the tailings cemented filling body, because the fiber tailings The post-peak bearing capacity of the sand-cemented backfill is an important property that characterizes its strength and toughness, and the post-peak ductile deformation stage of the fiber tailings-cemented backfill cannot be ignored.

Images