Open AccessResearch and application of pre-draining coal seam gas technology with three-dimensional cross drilling
Author(s) -
Liping Yang
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/514/2/022052
Subject(s) - drilling , coal mining , extraction (chemistry) , coal , bed , petroleum engineering , drainage , mining engineering , volume (thermodynamics) , geology , environmental science , engineering , waste management , mechanical engineering , chemistry , ecology , physics , chromatography , anisotropy , quantum mechanics , biology
In view of the current situation of low extraction efficiency and poor extraction efficiency of Yangquan No.5 mine 15# coal seam in, in order to ensure the daily safe and efficient production of coal mines, the three-dimensional cross-drilling technology was used to conduct field test on the drainage effect of the bedding in the 8401 working face, and compared with the gas drainage technology of traditional drilling arrangement methods such as plane cross hole and parallel hole arrangement. The result shows that after the gas extraction of the three-dimensional cross-drilled hole in the 8401 working face, the average extraction volume per 100 meters reaches 0.0097m 3 /min.hm, the attenuation coefficient is 0.0725d −1 , and the extraction effect is better than that of the plane-intersecting holes and the parallel arrangement of holes, which effectively reduces the occurrence of coal mine accidents and opens up a new technical way for coal mine gas drainage.