Concrete-like filling materials suitable for the treatment of goafs with large hollows in highways

A kind of concrete and filling material technology, which is applied in the field of highway goaf management, can solve the problems of hidden dangers in highway operation, single selection of grouting materials, stone formation rate, and low filling rate, so as to reduce surface storage and meet transmission needs , the effect of high stone rate

Active Publication Date: 2017-05-24
山西交科岩土工程有限公司 +1
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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

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  • Concrete-like filling materials suitable for the treatment of goafs with large hollows in highways
  • Concrete-like filling materials suitable for the treatment of goafs with large hollows in highways
  • Concrete-like filling materials suitable for the treatment of goafs with large hollows in highways

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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) Taking into account the convenience of local materials in Shanxi Province, the economic cost and the protection value of the environment, fly ash and coal gangue are selected as the main components of concrete-like materials, turning waste into treasure and realizing the recycling of resources; Coal gangue with a particle size of ~20mm forms a concrete-like skeleton structure and forms an effective strength support; fly ash and medium sand are used as ingredients to fill the gaps between the skeletons formed by the coal gangue, forming 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 final formed concrete can meet the transmission requirements of pumping, and can easily fill the goaf.

[0042] 2. Material ratio and strength test

[0043] ...

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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 field of road goaf treatment, in particular to a concrete-like filling material suitable for the treatment of gobs in large hollows of highways. 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-out 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 goaf. There are a large number of cavities, voids and fissures in the overlying rock of the goaf. Under the action of some inducing factors , which may break the relative stress balance, causing continuous or discontinuous subsidence and deformation on the surface of the goaf, endangering the operation safety of the ex...

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Application Information

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Patent Type & Authority Patents(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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