Like concrete filling material suitable for road large cavity goaf treatment

A kind of concrete-like, filling material technology, applied in the field of road goaf treatment, can solve the problems of stone rate, low filling rate, single selection of grouting material, difficult control of slurry diffusion, etc., to achieve high stone rate, meet transmission requirements, The effect of reducing the amount of storage on the ground

Active Publication Date: 2015-08-19
山西交科岩土工程有限公司 +1
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  • Abstract
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Problems solved by technology

However, due to insufficient research on gobs under the highway, in the design of grouting treatment for goafs, the grouting materials are selected only and the construction technology is backward, which makes it difficult to control the spread of grout, and the rate of stone formation and filling rate is low, and the pertinence is poor. , leaving a hidden danger to road operation safety

Method used

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  • Like concrete filling material suitable for road large cavity goaf treatment
  • Like concrete filling material suitable for road large cavity goaf treatment
  • Like concrete filling material suitable for road large cavity goaf treatment

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Experimental program
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Embodiment Construction

[0039] Specific embodiments of the present invention will be described in detail below.

[0040] 1. Raw material selection

[0041] (1) Comprehensively consider the convenience of local materials in Shanxi Province, the economic cost and the environmental protection value, choose fly ash and coal gangue as the main constituent materials of concrete, turn waste into treasure, and realize the recycling of resources; choose 5 Coal gangue with a particle size of ~20mm forms a concrete-like skeleton structure to form an effective strength support; fly ash and medium sand are selected as ingredients to fill the gaps between the skeletons formed by coal gangue to form a reasonable gradation mixture as a whole , It can not only form concrete with a certain strength, but also meet the requirements of compactness; and the finally formed concrete-like can meet the transmission demand of pumping, and can fill the goaf more conveniently.

[0042] 2. Material ratio and strength test

[0043] The m...

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Abstract

The invention discloses a like concrete filling material suitable for road large cavity goaf treatment. The material comprises 32.5 grade slag Portland cement, fly ash, medium sand, gangue and a high efficiency water reducer, and a ratio of water to cement to fly ash to medium sand to gangue is 12.4:3.2:12.05:12.05:60.3. The density of like concrete is greater than the density of water, so underground water residual in large cavities is discharged; and the like concrete has a high concretion rate, so large goaf is filled and densified to realize no future troubles. Ingredients of the like concrete are changed to valuables, so the like concrete filling material saves resources, protects environment, can meet pumping transmission demands, and has very good economic benefits and social values.

Description

Technical field [0001] The invention relates to the treatment field of highway goafs, in particular to a concrete-like filling material suitable for the treatment of highway goafs. The main materials include slag Portland cement, fly ash, medium sand and coal gangue. Background technique [0002] Shanxi Province is a province with large coal resources, with a wide range of mined areas, diverse mining methods and complex geological conditions. With the development of my country’s economy and the accelerated implementation of infrastructure construction projects, the construction of expressways in many places inevitably has to pass through the mined-out areas. A large number of cavities, voids and cracks in the overlying rock of the mined-out areas are under the influence of some inducing factors. , It may break the relative stress balance state, cause continuous or discontinuous subsidence and deformation of the surface of the goaf, and endanger the safety of expressway operation. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/08C04B14/06C04B18/12
CPCY02W30/91
Inventor 武军魏义强张晓薛春梅吴天军郝卫国苏培仁隋来才
Owner 山西交科岩土工程有限公司
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