Grouting material for coal seam floor reinforcement

A technology of grouting material and coal seam floor, which is applied in the field of grouting materials, can solve problems such as easy pollution, low gel strength, and high price, and achieve the effects of cost reduction, good durability, and non-pollution

Inactive Publication Date: 2018-05-29
北京大地高科地质勘查有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] (1) Water glass paste material: low gel strength, poor gel durability, easy to produce pollution
[0012] (2) Polymer slurry material: low gel strength, poor gel durability, easy to cause pollution; expensive, not a good choice for coal seam floor reinforcement projects with very large grouting volume
[0013] (3) Pure cement slurry material: Although it has the advantages of high gel strength, good gel durability, environmental protection and no pollution, the price is still high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Location: Zhaogu (Xinxiang) Second Mine, Henan.

[0031] Hydrogeological features: The main aquifers of the western working face of the Zhaogu No. 1 Coal seam roof sandstone aquifer. The limestone aquifer in the upper Taiyuan Formation is mainly composed of L 9 , L 8 , L 7 Composition of limestone, in which L 8 Mainly limestone, L 8 The average thickness of limestone is 6.8m-10.11m, the water level elevation is -321.53m, and the head pressure is 5.61Mpa-6.38Mpa. The karst fissures are relatively developed, the connectivity is strong, and the water-rich degree is high, which is the main filling that seriously threatens the safe production of mines. water aquifer.

[0032] From May 2016 to October 2017, we carried out treatment on the surface water damage area of ​​the western working face of Zhaogu No. 2 Mine.

[0033] Prepare raw materials: (1) Cement: Ordinary Portland cement with the label of 325; (2) Loess: Taken from the Xinxiang area of ​​the North China Pla...

Embodiment 2

[0043] Location: Jiulong Mine, Fengfeng Mining Area, Hebei Province.

[0044] Hydrogeological features: Jiulong Mine is located in the east of Fengfeng mining area, which is a concealed coal field. According to the mine field hydrogeological exploration and mine mining for many years, the aquifers related to mine coal mining are mainly wild limestone fissure karst aquifers, mountains, and Fuqing limestone. Fissure karst aquifer, Daqing limestone fissure karst aquifer, and Ordovician limestone karst fissure aquifer. Among them, the Ordovician limestone aquifer is the most water-filling water source that threatens mine safety production. Ordovician limestone not only It is thick, rich in water, rich in water, high in water head, and the head pressure is as high as 7.64MPa~10.58MPa.

[0045] From November 2012 to January 2015, we carried out water damage control in the water damage area of ​​Jiulong Mine.

[0046] Prepare raw materials: (1) Cement: Ordinary Portland cement label...

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Abstract

The invention discloses a grouting material for coal seam floor reinforcement. The grouting material is prepared from cement, loess and water through mixing and is in a form of slurry, wherein the weight ratio of cement to loess is (20-4):1, and the amount of water is 120%-300% of the total weight of cement and loess. The grouting material has the benefits as follows: (1) the cheap loess substitutes for part of cement in pure cement paste (single liquid cement paste), cement-loess mixed slurry is formed, accordingly, the material integrates advantages of good durability and high strength of pure cement slurry, and the cost of coal seam floor reinforcement is reduced; (2) components of the mixed slurry are not prone to pollution generation.

Description

technical field [0001] The invention relates to a grouting material, in particular to a grouting material for coal seam floor reinforcement Background technique [0002] Coal is an important basic energy in my country, accounting for nearly 70% of China's primary energy consumption. my country's coal resources are relatively rich, mainly distributed in North China and Northwest China. Among them, coal resources in North China account for nearly 60% of the country's reserves. The main distribution ranges of North China type coal fields in my country are as follows: north to Yinshan and Tianshan Mountains, south to Qinling, west to Helan Mountain and Liupanshan (the west edge of Ordos Basin), east to Bohai Sea and Yellow Sea. [0003] The Carboniferous-Permian coal-measure strata in North China lies under the thick Ordovician aquifer strata. The aquifer is thick and the water head pressure is high. The pressure in major mining areas is mostly around 10MPa. The pressure in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/70
CPCC04B28/04C04B2111/00724C04B2111/70C04B2201/50C04B14/04
Inventor 张小龙雷建宗张彪阴慧胜
Owner 北京大地高科地质勘查有限公司
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