An inorganic foaming gel for preventing spontaneous combustion in a top-coal falling region

作者：Yu Shui Jun^*; Yu Ming Gao; Xie Feng Cheng; Pan Rong Kun; Lu Lai Xiang; Chang Xu Hua

来源：Journal of China University of Mining & Technology, 2010, 39(2): 173-177.

• Air leakage
• Coal seams
• Fire prevention
• Gas concentration
• Injection test
• Inorganic gelled material
• Material consumption
• Pressure injection
• Prevention
• Structural deformation

Fire prevention in a top-coal falling area of a return airway was effected by use of a new self-foaming inorganic gel applied with pressure injection equipment. The thirteenth mine of the Pingdingshan Coal Company Ltd., was used as a test airway (1111 work face of coal seam F15.17). Twelve injection tests were done over a period of thirty days. The average gas concentrations after applying grout to the grouting holes were 16.492%, 81.544%, 0.041%, 0.177% and 1.634% for O2, N2, CO, CO2 and CH4, respectively. These values were changed from 5.305%, 82.265%, 0.139%, 2.531% and 9.560% before the application of grout. This shows that the inorganic foam gel in the top-coal falling region significantly reduced air leakage and prevented further oxidation in the area. The concentrations of CO, CO2 and CH4 were reduced. This effectively prevents spontaneous combustion in the region. Material consumption using this foam was one-third to one-eighth of that when a non-foaming grout was used. After dehydration of the foam from heat there was neither air leakage nor structural deformation of the grout.

• 出版日期2010
• 单位Polytechnic university