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Mechanical properties and hydration mechanism of high-flow sealing hole grouting material
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Xin GUO1, Yi LU1, 2, **, Shiliang SHI1, He LI1, Dafang LI1
China Safety Science Journal | 2024, 34(2) : 168 - 175
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China Safety Science Journal | 2024, 34(2): 168-175
• Safety engineering technology •
Mechanical properties and hydration mechanism of high-flow sealing hole grouting material
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Xin GUO1, Yi LU1, 2, **, Shiliang SHI1, He LI1, Dafang LI1
Affiliations
  • 1 School of Resource，Environment and Safety Engineering，Hunan University of Science and Technology，Xiangtan Hunan 411201，China
  • 2 Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines，Hunan University of Science and Technology，Xiangtan Hunan 411201，China
Published: 2024-02-28 doi: 10.16265/j.cnki.issn1003-3033.2024.02.0710
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To improve coalbed methane extraction efficiency in deep mines，a high-flow sealing hole grouting material was developed using superfine cement as the base material to overcome issues of commonly used high polymer sealed materials such as high cost and flammable，low permeability of ordinary cement materials，and insufficient strength of paste materials such as fly ash. The hydration mechanism of the developed high-flow sealing grouting material was explored by an experimental study on the material's mechanical properties，combined with the measurements by scanning electron microscope(SEM)and X-ray diffraction(XRD). The results indicated that a large amount of calcium silicate hydrate (C-S-H) gel and ettringite (AFt) crystals were generated in the high-flow sealing grouting material during the initial phase of hydration. Furthermore，the gel particles of hydration products filled the pores of the material with the hydration reaction. Compared to commonly used cement sealing grouting material，the hydration reaction of the developed material was much faster and more complete，and the overall structure was more denser. Moreover，the compressive strength was increased by 3.68%. Therefore，the developed high-flow sealing hole grouting material can maintain the stability of gas extraction boreholes and improve gas extraction efficiency.

high-flow sealing  /  grouting material  /  drainage borehole  /  hydration reaction  /  hydration product
Xin GUO, Yi LU, Shiliang SHI, He LI, Dafang LI. Mechanical properties and hydration mechanism of high-flow sealing hole grouting material[J]. China Safety Science Journal, 2024 , 34 (2) : 168 -175 . DOI: 10.16265/j.cnki.issn1003-3033.2024.02.0710
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doi: 10.16265/j.cnki.issn1003-3033.2024.02.0710
  • Receive Date：2023-08-16
  • Online Date：2025-07-09
  • Published：2024-02-28
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  • Received：2023-08-16
  • Revised：2023-11-18
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Affiliations
    1 School of Resource，Environment and Safety Engineering，Hunan University of Science and Technology，Xiangtan Hunan 411201，China
    2 Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines，Hunan University of Science and Technology，Xiangtan Hunan 411201，China
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https://castjournals.cast.org.cn/joweb/zgaqkxxb/EN/10.16265/j.cnki.issn1003-3033.2024.02.0710
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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