Coalmine Ordovician-limestone high-pressure-bearing water bottom plate fracture grouting material and preparing method thereof

A technology of grouting material and production method, which is applied in the field of grouting materials, can solve problems such as land occupation, waste of resources, environmental pollution and hazards, and achieve the effects of cost saving, reduction of grinding energy consumption, and low porosity

Inactive Publication Date: 2015-11-25
SHANDONG BODA IND & TRADE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Abandoned gangue, as the main process waste of coal enterprises, accumulates in large quantities around coal enterprises, causing seri...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A coal mine Austrian ash high-pressure water floor crack grouting material, which is made of 25 parts of ordinary Portland cement, 15 parts of clay and 60 parts of coal gangue powder first mixed and then ground. Coal gangue powder is a powdery material that is physically pulverized by a ball mill, and it is guaranteed that 98% of the particle size is less than 45un, and the above-mentioned parts are parts by weight.

[0026] Compared with cement 40% and clay 60% grout, this grouting material has no significant difference in late strength and higher fluidity than the latter, but its early strength is lower. mine grouting.

[0027] The preparation method of the above-mentioned coal mine Austrian ash high pressure water floor crack grouting material is as follows:

[0028] The first step is to grind the gangue with a ball mill for 25 minutes, pass through a 200-mesh square hole sieve, and take the coal gangue powder under the sieve for later use; the bulk density of the p...

Embodiment 2

[0032] A coal mine Austrian ash high-pressure water floor crack grouting material, which is made of 60 parts of coal gangue powder, 30 parts of ordinary Portland cement and 10 parts of clay first mixed and then ground. Coal gangue powder is a powdery material that is physically pulverized by a ball mill, and it is guaranteed that 98% of the particle size is less than 45un, and the above-mentioned parts are parts by weight.

[0033] Compared with cement 40% and clay 60% grout, this grouting material has higher early strength and later strength than the latter, comparable fluidity and similar permeability coefficient to the latter, and is suitable for any Austrian ash with high pressure. Mine grouting of water floor.

[0034] The preparation method of the above-mentioned coal mine Austrian ash high pressure water floor crack grouting material is as follows:

[0035] The first step is to grind the gangue with a ball mill for 25 minutes, pass through a 200-mesh square hole sieve,...

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Abstract

The invention discloses a coalmine Ordovician-limestone high-pressure-bearing water bottom plate fracture grouting material and a preparing method thereof. The grouting material is characterized by comprising, by weight, 60 parts of coal gangue powder, 25 parts to 30 parts of ordinary portland cement and 10 parts to 15 parts of clay in a mixing-grinding mode, wherein the size of particles of the coal gangue powder obtained before mixing is smaller than 45 un. According to the coalmine Ordovician-limestone high-pressure-bearing water bottom plate fracture grouting material and the preparing method, on the basis that high-pressure-bearing limestone at a specific-depth portion of a coalmine is reconstructed, coal gangue is sufficiently used for reducing the cost of the grouting material; the clay is a raw material low in price and easy to get, the requirements for the indexes of the grouting material are met while cost is saved, the waste coal gangue of the coalmine can be sufficiently used for treating an Ordovician-limestone water partition layer accordingly, the grouting treatment cost can be effectively reduced, the enterprise income can be increased, and the mine-lot ambient environment can be easily improved.

Description

technical field [0001] The present invention relates to grouting materials. Background technique [0002] Ordovician limestone refers to Ordovician limestone. The Ordovician limestone in the earth's crust has a large number of water storage caves, and some coal mines have been threatened by Ordovician limestone for a long time. When the Austrian ash water is at a high level, it flows into the coal mine working face through the authigenic fissures and the mining fissures of the water-resisting layer, causing well flooding accidents. The current treatment method is to grout the Austrian ash floor to seal the cracks. In the existing floor grouting project, the grouting material generally adopts single-liquid cement slurry and clay-cement mixed slurry, wherein the cement-clay slurry material has a cement content of 40% and a clay content of 60%. For large-scale grouting projects carried out by coal mining enterprises, especially in the grouting reconstruction project of high-...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B14/10C04B18/12
CPCY02W30/91
Inventor 吕光袁明旺冯兆安房孝春马金伟刘贤好江玉祥张秀军王洪燕
Owner SHANDONG BODA IND & TRADE CO LTD
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