Open AccessExperimental Study on Gas Extraction Effect of Conventional Drilling in Coal Mining Face
Author(s) -
Di Zhang,
Zhuangzhuang Yao,
Meicheng Zhao
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/781/2/022097
Subject(s) - telecommunications link , borehole , drilling , extraction (chemistry) , coal , petroleum engineering , drilling fluid , geology , engineering , geotechnical engineering , telecommunications , chemistry , waste management , mechanical engineering , chromatography
In order to study the effect of conventional drilling gas extraction technology, combined with the observation results of upward drilling and downlink drilling field test in 81309 working face of Baode Mine. The analysis of field test data shows that under the same gas control effect, the average gas concentration and gas purity of uplink drilling are higher than that of downlink boreholes. In the extraction range, the average pumping concentration of uplink boreholes is 1.134 times higher than that of downlink boreholes, while the average pure gas flow rate of uplink boreholes is 1.296 times higher than that of downlink boreholes. The test results show that the uplink conventional drill Hole has better pumping concentration stability and extraction effect than downlink conventional drilling.