Details

Autor(en) / Beteiligte

• Ma, Shuyin

Titel

Research on permeability increasing technology of low permeability combined rock coal seam

Ist Teil von

• IOP conference series. Earth and environmental science, 2021-07, Vol.804 (2), p.22055

Ort / Verlag

Bristol: IOP Publishing

Erscheinungsjahr

2021

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Abstract Aiming at the problem of improving the permeability of the low permeability combined rock coal seam and the gas drainage effect of a certain mine, the coal seam field engineering test is adopted, and the method of combining the gas drainage effect before and after hydraulic permeability enhancement is used to carry out the underground field test research. The results show that: in the low-permeability combined rock coal seam, the influence radius of 15m of hydraulic fracturing is adopted, which increases the scalar amount of gas drainage by more than 6.44 times and the concentration of drainage by more than 5 times. Pure gas drainage effect is significant. Hydraulic fracturing enhanced permeability can improve the connectivity between coal pores, reduce the effective stress of the coal body, and increase the permeability of the coal seam. Through engineering tests, a set of hydraulic fracturing enhanced permeability technologies suitable for the low permeability combination rock coal seam of the mine have been formed. It is of great significance to guarantee the safe production of the mine.