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A Method for Predicting the Strength of Tailings Cemented Paste Filling Body

A paste filling and strength technology, applied in suspension and porous material analysis, instrument, permeability/surface area analysis, etc. The effect of scientifically and rationally arranging production plans, ensuring safe production, and improving production efficiency

Active Publication Date: 2020-06-02
赤峰柴胡栏子黄金矿业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The on-site coring method is difficult to implement, and a large amount of samples needs to be obtained, and the coring process will inevitably damage the integrity of the sample, thus affecting the accuracy of the test results
As for the pure laboratory test analogy method, because the laboratory conditions cannot fully simulate the downhole environment (temperature, humidity, drainage conditions), stope size effect and consolidation effect, etc., there is a big difference from the field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0027] Example: Taking a mine underground paste filling project as an example, the engineering practice verification of paste filling body strength-microscopic pore structure is carried out.

[0028] The paste used for on-site filling is composed of iron ore tailings, ordinary Portland cement and groundwater. The mass ratio of cement to iron ore tailings is 1:15, and the solid mass concentration is 81%.

[0029] 1) On-site sampling: first, the paste filling body is sampled downhole, the diameter of the sampling tool is 100mm, and the length is 200mm;

[0030] 2) Drying treatment: cut the obtained sample into 1cm 3 The left and right small squares, when drying, first place the sample in a GJWB08S-3Z microwave dryer for 6 minutes, with a working power of 700W and a working frequency of 2.45GHz; then place the sample in a Thermo Fisher LS oven at 35°C -Dry in VO20 type vacuum drying oven for 24h;

[0031] 3) Mercury intrusion porosity test: The test environment is nitrogen, the...

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Abstract

The invention discloses a method for estimating the strength of a tailing cementing ointment filled body. The method comprises the following steps: firstly, sampling an on-site ointment filled body; secondly, testing the micro-pore structure of a test sample through pressured-mercury testing; testing the micro-pore structure of an on-site ointment material, and calculating and estimating a single-axis pressure resistance value of an ointment according to the relationship between the single-axis pressure resistance of the ointment material and the micro-pore structure. By adopting the method, the strength of an underground on-site ointment filled body can be predicted in a mode of combination of on-site sampling and laboratory testing. By adopting the method, the strength of the undergroundon-site ointment filled body can be simply, rapidly and accurately predicted, reliable bases can be made for reasonable planning of mining well production, and wide practicability can be achieved. The method is a scientific and reasonable method for estimating the strength of tailing cementing ointment filled bodies with the combination of laboratory testing and on-site testing, and has great significances for scientific and reasonable production planning, production efficiency improvement and production security.

Description

technical field [0001] The invention belongs to the related technical field of mine paste filling engineering and mine filling material strength prediction, and in particular relates to a method for predicting the strength of tailings cemented paste filling body. Background technique [0002] The tailings cemented paste filling material is composed of fully graded tailings, cement and water. The paste filling has significant advantages such as good stability, no layering and segregation, no need for dehydration, and long transportation distance. It is the future mine filling technology. development trend. Among them, the strength of the filling body is one of the most important evaluation indicators for the quality of the paste filling, which directly determines the excavation time of the adjacent pillars. Excavating too early may cause the collapse of the filling body, and seriously cause casualties ; Excavation too late will reduce the direct economic benefits of the mine...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08
CPCG01N15/088
Inventor 王成杨晓东李元辉马立阔陈宗灵徐东安龙何玉龙于平于学良
Owner 赤峰柴胡栏子黄金矿业有限公司
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