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Microbial cemented filling material for coal mines and preparation method thereof

A technology of microbial glue and filling material, applied in the field of filling materials, can solve the problems of high slump and bleeding rate, large amount of microorganisms, poor filling effect, etc. The effect of less and high connection rate

Inactive Publication Date: 2020-09-08
ANJIEYU BEIJING OILFIELD TECHNICAL SERVICES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, the existing microbial cemented filling materials for coal mines mainly have the following main defects: (1) large amount of microorganisms; (2) low compressive strength and low roof connection rate; (3) slump and bleeding rate High; these defects will inevitably lead to poor filling effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1 A kind of microbial cemented filling material for coal mine and its preparation method

[0045] The preparation method of the coal mine microorganism cemented filling material comprises: cultivation of coal mine microorganisms, preparation of calcium-based chitosan solution, preparation of urea-calcium-based chitosan solution, preparation of matrix and mixing. Specifically include the following steps:

[0046] (1) Cultivation of microorganisms used in coal mines

[0047] Inoculate the microbial liquid into the culture medium, and ferment and cultivate for 35 hours at a temperature of 25°C to obtain microorganisms for coal mines. The urease activity of microorganisms for coal mines reaches 750 U.mL -1 .

[0048] The microbial bacterial liquid is a urease-producing microorganism isolated from the mine environment, and the microbial bacterial liquid is Clostridium sporogenes (after testing, Clostridium sporogenes with the preservation number CGMCC1.5212), Bacil...

Embodiment 2

[0061] Example 2 A kind of microbial cemented filling material for coal mine and its preparation method

[0062] The preparation method of the coal mine microorganism cemented filling material comprises: cultivation of coal mine microorganisms, preparation of calcium-based chitosan solution, preparation of urea-calcium-based chitosan solution, preparation of matrix and mixing. Specifically include the following steps:

[0063] (1) Cultivation of microorganisms used in coal mines

[0064] Inoculate the microbial liquid into the culture medium, and ferment and cultivate for 35 hours at a temperature of 32°C to obtain microorganisms for coal mines. The urease activity of microorganisms for coal mines reaches 900 U.mL -1 .

[0065] The microbial bacterial liquid is a urease-producing microorganism isolated from the mine environment, and the microbial bacterial liquid is Clostridium sporogenes (after testing, Clostridium sporogenes with the preservation number CGMCC1.5212), Bacil...

Embodiment 3

[0078] Example 3 A kind of microbial cemented filling material for coal mine and its preparation method

[0079] The preparation method of the coal mine microorganism cemented filling material comprises: cultivation of coal mine microorganisms, preparation of calcium-based chitosan solution, preparation of urea-calcium-based chitosan solution, preparation of matrix and mixing. Specifically include the following steps:

[0080] (1) Cultivation of microorganisms used in coal mines

[0081] Inoculate the microbial liquid into the culture medium, ferment and cultivate for 20 hours at a temperature of 35°C, and obtain microorganisms for coal mines. The urease activity of microorganisms for coal mines reaches 900 U.mL -1 .

[0082] The microbial bacterial liquid is a urease-producing microorganism isolated from the mine environment, and the microbial bacterial liquid is Clostridium sporogenes (after testing, Clostridium sporogenes with the preservation number CGMCC1.5212), Bacillu...

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Abstract

The invention provides a preparation method of a microbial cemented filling material for a coal mine. The preparation method comprises the steps of culture of microorganisms for the coal mine, preparation of a calcium-based chitosan solution, preparation of a urea-calcium-based chitosan solution and preparation of a matrix. A preparation method of the calcium-based chitosan solution comprises heating a 12-15% chitosan-acetic acid solution, carrying out heat preservation, and adding anhydrous calcium chloride until the calcium ion content is 65-90 g / l. According to a preparation method of the matrix, the mass ratio of the coarse aggregate to the fine aggregate is (6-8): (1.4-2.5), and the average specific surface area of the coarse aggregate is 500-1500 m<2> / kg, and the average specific surface area of the fine aggregate is 1500-3000 m<2> / kg. The microbial cemented filling material for coal mine has the advantages of low microbial consumption, high compressive strength, high roof contact rate, small slump and low bleeding rate. The technical problems that an existing microorganism cemented filling material is large in use amount and poor in cemented filling effect are solved.

Description

technical field [0001] The invention belongs to the technical field of filling materials and relates to a cemented filling material, in particular to a microbial cemented filling material for coal mines and a preparation method thereof. Background technique [0002] As we all know, with the large increase in the mining volume of large-scale open-pit mines, the production capacity of ore rocks has been greatly improved, but at the same time it has also brought hidden dangers to the safety of the surface and underground after mining. Therefore, the management of mines after mining has increasingly attracted research and development attention of personnel. [0003] The Chinese patent with the notification number CN104446252B provides a coal mine cemented filling material and a filling method with loess as the main raw material, and relates to the coal mine cemented filling technical field. The coal mine cemented filling material is composed of water and solid material, the mas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C12N1/20C12R1/145C12R1/07C12R1/01
CPCC04B28/00C04B2111/00724C04B2201/50C12N1/20C04B2103/0001C04B24/38C04B22/124C04B24/126C04B18/10C04B18/08C04B14/06C04B14/42C04B14/104C04B24/085C04B18/146C04B2103/302
Inventor 严希海严谨
Owner ANJIEYU BEIJING OILFIELD TECHNICAL SERVICES CO LTD
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