Gob-side entry retaining roadside filling material with adjustable setting, high flow state and high stability and preparation method of gob-side entry retaining roadside filling material

A high stability, filling material technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of slow solidification, high labor intensity, low construction efficiency, etc., and achieve good pressure bearing capacity , high construction efficiency and excellent pumpability

Pending Publication Date: 2022-05-20
贵州省建筑材料科学研究设计院有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Cement-based block filling has the problems of high labor intensity and low construction efficiency; cement-based fluid filling materials have the problem of slow solidification speed during on-site construction; high-water filling materials have the problem of work efficiency caused by easy bleeding and segregation to block the pump pipe;

Method used

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  • Gob-side entry retaining roadside filling material with adjustable setting, high flow state and high stability and preparation method of gob-side entry retaining roadside filling material
  • Gob-side entry retaining roadside filling material with adjustable setting, high flow state and high stability and preparation method of gob-side entry retaining roadside filling material
  • Gob-side entry retaining roadside filling material with adjustable setting, high flow state and high stability and preparation method of gob-side entry retaining roadside filling material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] like figure 1 As shown, the preparation method of filling material beside gob-side entry retaining with adjustable setting height and high stability of flow state:

[0050] Preparation of cementitious material: mix and prepare 190kg of sulphoaluminate cement clinker, 2kg of boric acid, and 1kg of steel fiber, which is counted as one part (193kg);

[0051] Preparation of pumping materials: 1050kg of limestone machine-made sand, 50kg of quicklime, 200kg of phosphogypsum, and 22kg of aluminum sulfate are mixed and prepared, which is counted as one part (1322kg);

[0052] Composite additive preparation: mix and prepare polycarboxylate high-efficiency water reducer 8kg, air-entraining agent 1.5kg, and defoamer 1.5kg;

[0053] Mix and stir one portion of the gelling material with 5kg of compound additives and 80kg of water to prepare a gelling intermediate;

[0054] Mix and stir one portion of the pumping material with 6kg of compound additives and 220kg of water to prepare...

Embodiment 2

[0057] like figure 1 As shown, the preparation method of filling material beside gob-side entry retaining with adjustable setting height and high stability of flow state:

[0058] Preparation of cementitious material: mix and prepare 120kg of sulphoaluminate cement clinker, 1kg of boric acid, 1kg of basalt fiber, and 5kg of bentonite, which is counted as one part (127kg);

[0059] Preparation of pumping materials: 1300kg of crushed hard gangue particles, 40kg of quicklime, 160kg of desulfurized gypsum, and 20kg of sodium sulfate are mixed and prepared as one part (1520kg);

[0060] Composite additive preparation: mix and prepare polycarboxylate high-efficiency water reducer 10kg, air-entraining agent 0.5kg, and defoamer 0.5kg;

[0061] Mix and stir one portion of the gelling material with 4kg of compound additives and 60kg of water to prepare a gelling intermediate;

[0062] Mix and stir one portion of the pumped material with 7kg of compound additives and 270kg of water to ...

Embodiment 3

[0065] like figure 1 As shown, the preparation method of filling material beside gob-side entry retaining with adjustable setting height and high stability of flow state:

[0066] Preparation of cementitious material: mix and prepare 140kg of sulfoaluminate cement clinker, 0.5kg of boric acid, and 10kg of magnesium aluminum silicate, count as one part (150.5kg);

[0067] Preparation of pumping materials: 1200kg of river sand, 60kg of quicklime, 200kg of desulfurized gypsum and 20kg of aluminum sulfate are mixed and prepared as one part (1480kg);

[0068] Preparation of compound additives: mix 9kg of polycarboxylate superplasticizer, 1kg of air-entraining agent, and 1kg of defoamer;

[0069] Mix and stir one portion of the gelling material with 5kg of compound additives and 70kg of water to prepare a gelling intermediate;

[0070] Mix and stir one portion of the pumping material with 6kg of compound additives and 250kg of water to prepare a pumping intermediate material;

[...

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Abstract

The invention relates to the technical field of mine roadway engineering support, in particular to a gob-side entry retaining roadside filling material with adjustable solidification, high flow state and high stability and a preparation method of the gob-side entry retaining roadside filling material. According to the present invention, the composite auxiliary agent is added, such that the gelling intermediate material obtained by respectively mixing the gelling material, the pumping material, the composite auxiliary agent and the water has characteristics of long-time non-condensation, good pumpability and long standby time, can be solidified within 30 min after mixing filling, can achieve more than 1.2 MPa within 2 h, can achieve more than 4.0 MPa after 24 h, and can finally achieve more than 6.0-15.0 MPa of compressive strength; while good filling and supporting performance is achieved, construction difficulty and labor intensity of workers are greatly reduced, and comprehensive utilization of industrial solid waste such as coal gangue and industrial byproduct gypsum can be achieved.

Description

technical field [0001] The invention relates to the technical field of mine roadway engineering support, in particular to a gobside roadside filling material with adjustable condensation height and high stability and a preparation method thereof. Background technique [0002] Gobside entry refers to the mining technology of retaining and maintaining the original mining roadway along the edge of the goaf during the mining face, and continuing to use it as the mining roadway of the adjacent working face. It is the most common mining method without pillars , has been popularized and applied in our country. Gobside entry retaining mining technology can effectively reduce the amount of roadway excavation, reduce the loss of pillars in the roadway protection, and increase the resource recovery rate. For coal mine mining, it can solve the problem of gas accumulation in the upper corner and avoid natural fires. At the same time, it can also improve the recovery rate of coal resourc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06
CPCC04B28/065C04B2111/00724C04B2111/00146C04B2201/50C04B22/0013C04B14/48C04B14/28C04B22/064C04B22/144C04B22/148C04B2103/302C04B2103/304C04B2103/50C04B14/4656C04B14/104C04B18/12C04B22/145C04B22/147C04B14/041C04B14/068Y02W30/91
Inventor 高遇事贾韶辉李志豪蒙正炎彭云峰赵先锐陈建忠王勇
Owner 贵州省建筑材料科学研究设计院有限责任公司
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