Method for preparing layered structure of rock-like material physical model of roadway cement mortar

By combining molds and layer-by-layer cement mortar pouring, the problem of simulating the failure mechanism of layered rock masses in deep metal mines was solved, achieving efficient and low-cost physical model preparation, which is applicable to the study of layered rock masses with different dip angles.

CN118744471BActive Publication Date: 2026-03-31NORTHEASTERN UNIV CHINA
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Patent Information

Application Number
CN202411006170.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-07-25
Publication Date
2026-03-31
Estimated Expiration
2044-07-25

AI Technical Summary

Technical Problem

Existing technologies are insufficient to accurately simulate the failure mechanism of layered rock tunnels in deep metal mines, especially under conditions of high ground stress and blasting disturbance. Furthermore, existing methods cannot effectively create physical models of layered rock masses containing semi-circular arched tunnel openings.

Method used

A mold combining transparent and opaque materials is used, with pre-set tunnel openings and a retractable support device. A layered tunnel model is formed by pouring cement mortar layer by layer to simulate layered joints with different dip angles. A specific ratio of cement, river sand and water is used, along with a release agent and mica sheets to enhance the model's visibility and strength.

Benefits of technology

It achieves accurate simulation of tunnels in layered rock masses in deep metal mines, reduces the difficulty and cost of model making, improves the integrity and strength of the model, enables observation and adjustment of the pouring process, and adapts to the study of layered rock masses with different dip angles.

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Abstract

A layered structure roadway cement mortar physical model preparation method of rock-like material belongs to the field of rock mass mechanics and rock engineering, and steps are as follows: 1. According to the engineering site situation and the predicted size, a mold is made, and a preset roadway hole is drilled on the required unit plate in advance, and then combination is carried out; 2. The roadway model is made, and after the mold combination is completed, it is inserted along the opposite preset roadway hole, and the combined mold is prepared; 3. The combined mold is placed on the telescopic support device; 4. The inner wall of the mold and the outside of the roadway model are coated with release agent, and the rock-like material is poured layer by layer, the existence of layered joints is highlighted, and the surface is scraped after vibration and compaction; 5. Demoulding and curing, and the layered structure roadway cement mortar physical model is obtained. The preset roadway hole on the mold ensures the similarity between the poured physical model and the deep metal mine layered rock roadway; the model prepared by using cement mortar reduces the difficulty and cost of obtaining the layered rock.
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