Open AccessResearch on “Three Sealing and One Grouting” Sealing Technology
Author(s) -
Zhou Houquan,
Qiang Ma
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/332/3/032042
Subject(s) - borehole , drainage , geotechnical engineering , coal mining , petroleum engineering , materials science , coal , engineering , waste management , ecology , biology
Taking the 3314 transportation roadway of Wangpo Coal Mine as the research background, the stress and strain characteristics of the roadway after support were studied by FLAC 3D numerical simulation. It is determined that the reasonable sealing depth is not less than 15m, and then the “three sealing and one grouting” sealing technique is proposed on the basis of the “two sealing and one grouting” methods, and the two sealing methods are compared and analyzed. The results show that the total average gas concentration and the maximum average gas concentration of the “three sealing and one grouting” sealing technique are 9.5% and 16.5% higher than the “two sealing and one grouting” respectively, and the gas concentration of the borehole after 70 days of drainage is still up to 40%. The “three sealing and one grouting” sealing technique can effectively improve the efficiency of gas drainage.