Rock-soil slurry cemented regenerated roof characteristic space-time distribution prediction method and system

Abstract

The invention discloses a rock-soil slurry cemented regenerated roof characteristic space-time distribution prediction method and system. The methodin the technical scheme comprises steps of carrying out a mechanical property test on a pure slurry test piece to obtain a regenerated roof strength upper limit, carrying out mechanical property test on the grouting body test piece under the drainage compaction condition to obtain an influence rule of the water content on the strength of the grouting body, carrying out mechanical property test on the grouting body test piece under the non-drainage compaction condition to obtain an influence rule of the compaction effect on the strength of the grouting body, performing a grouting reinforcement similar simulation test on the fractured rock mass to obtain grouting simulation stratum water content data, and according to the regenerated roof strength upper limit, the influence rule of the water content on the strength of the grouting body, the influence rule of the compaction effect on the strength of the grouting body and the grouting simulation stratum water content data, establishing a grouting body mechanical property space-time distribution prediction model. Accurate evaluation and prediction of grouting reinforcement physical and mechanical properties of rock and soil grouting materials can be realized.

Description

technical field [0001] The invention relates to the field of geotechnical engineering, in particular to a method and system for predicting the temporal and spatial distribution of characteristics of a regenerated roof slab cemented with rock-soil slurry. Background technique [0002] In recent years, many broken rock masses in coal seam gobs have been reinforced with geotechnical materials such as yellow mud, which has the advantage of being fireproof while being reinforced by grouting. The strength of the broken rock mass after grouting mainly comes from the seepage and filling of rock-soil grout in the pores and fissures of the broken rock mass, and through the consolidation and drainage of the yellow mud itself, it forms a dense and stable cemented body with the broken rock mass. In order to evaluate the performance of grouting cemented bodies in broken rocks, many achievements have been made in researches on grouting reinforcement technology and grouting effect detection...

AI Technical Summary

Problems solved by technology

[0007](1) Existing methods are all aimed at cement grouting materials. Due to different reinforcement mechanisms, the strength prediction mechanism and means are not suitable for rocks such as yellow mud. Soil grouting materials;

[0008](2) Existing methods can only predict the short-term (7-30 days) reinforcement strength of the broken rock mass in a short period of time, but cannot predict the long-term reinforcement strength of the broken rock mass (1-10 years) reinforcement strength;

[0009](3) The existing method is mainly aimed at the strength of the cemented body after grouting reinforcement, and cannot carry out the grouting reinforcement process (different grouting body forming stages, different time gradients ) strength evolution prediction;

[0010](4) The existing method can only predict the overall strength of the grouting reinforced formation, but cannot grouting the broken rock strata or goafs with large mining heights under different spatial distributions Reinforcement Strength Deployment Prediction

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