Open AccessExperimental study on fracturing coal seams using CaO demolition materials to improve permeability
Author(s) -
Yibo Tang,
Liang Yuan,
Jianyang Xue,
Changrui Duan
Publication year - 2017
Publication title -
journal of sustainable mining
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.623
H-Index - 17
eISSN - 2543-4950
pISSN - 2300-3960
DOI - 10.1016/j.jsm.2017.07.002
Subject(s) - demolition , water reducer , hydraulic fracturing , permeability (electromagnetism) , coal mining , coal , mining engineering , petroleum engineering , waste management , environmental science , briquette , methane , engineering , geotechnical engineering , civil engineering , fly ash , chemistry , biochemistry , organic chemistry , membrane
Currently, methane gas disasters in underground coal mines are a major problem which seriously threatens safe mining. This study employed soundless chemical demolition for fracturing coal seams with low permeability. Additionally, the fracturing theory and failure mechanisms of soundless chemical demolition agents were investigated. Materials such as CaO, naphthalene-based water reducer, sodium gluconate and silicate cement were used to prepare the novel soundless chemical demolition agent, whose optimum proportion was discovered to be 90:3:5:7 by carrying out orthogonal experiments. The innovative demolition agent cracked briquettes and the maximum width of cracks reached 16.33 mm, showing significant potential for improving the permeability of coal seams