Preparation of composite expansion material and its application in methane drainage

doi:10.16265/j.cnki.issn1003-3033.2017.12.015

Abstract

Abstract: To improve the sealing effect of gas-pumped drilling, a kind of drilling sealing material with high swelling rate, rapid coagulation and high strength was developed by mixing portland cement, calcium sulphoaluminate cement and a self-made high-rate expansion agent. The data on the fluidity, solidification time and compressive strength of the material were obtained in the laboratory. Borehole seal comparison experiments were carried out between the material and the common borehole sealing material (marithan). The results show that in comparison with the marithan, use of the material increases the volume fraction of methane by 18%-24%, the pumping rate by 50%-80%, among others.

Key words: borehole seal, crossing hole, ettringite, gas concentration, marithan

CLC Number:

X936

REN Qingshan, AI Dechun, GUO Mingtao. Preparation of composite expansion material and its application in methane drainage[J]. China Safety Science Journal, 2017, 27(12): 86-90.

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