Overlying rock isolation grouting filling fly ash slurry compression test system and method

Abstract

A system and method for compression test of filling flyash slurry in overburden rock isolated injection is suitable for use in the field of green mining projects. The system comprises a slurry compression device, a bleeding base, a bleeding collecting device and an ash taking base; the slurry compression device comprises a cylindrical grout bucket, a pressure piston is disposed in the grout bucket and comprises a pressure rod and a piston head, and the piston head is provided with a vent bolt; the bleeding base comprises a bottom seat, the top of the bottom seat recesses down, a screen plate with holes is arranged between a recess of the bottom seat and the grout bucket, a water guide channel is arranged below the recess of the bottom seat, the bottom of the water guide channel is connected with the bleeding collecting device, the bleeding collecting device comprises a drain valve, the drain valve is connected with a measuring tube through a water guide pipe, and an electronic scale is disposed below the measuring tube. The system is stable in design structure, reliable in strength, simple in structure and convenient for staff to operate and acquires test results at the premise of safety ensured.

Description

Technical field [0001] The invention relates to a fly ash slurry compression experiment system and method, and is particularly suitable for the overburden isolation grouting filling fly ash slurry compression experiment system and method used in the field of green mining of mining engineering. Background technique [0002] my country’s coal mines with only integrated coal mines have a total pressure of 13.79 billion tons, of which 9.468 billion tons are under buildings, accounting for 69% of the total coal pressure. Coal mining by mine workers can cause ground collapse, lead to soil erosion, economic loss and environmental damage. Overlying rock isolation grouting filling technology provides new ideas for solving the above problems, and has achieved remarkable results. [0003] In the process of overburden grouting and filling, the final compacted ash body is the final compacted ash body that plays the role of reducing settlement in the filled fly ash slurry, and the water in it d...

AI Technical Summary

Problems solved by technology

In terms of this kind of experimental research, relevant technologies have reported the compression characteristics and concrete bleeding characteristics of dry fly ash and gangue powder. The compression coefficient of the concrete, let alone its bleeding characteristics; the latter research object is the bleeding characteristics of concrete, but it cannot be used to study the compression characteristics of fly ash slurry under different pressures

In other words, neither of these two existing technologies can be used to carry out experimental research on the compression characteristics of fly ash slurry filled with isolated grouting overlying rock

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