山东煤炭科技2026，Vol.44Issue(8)：21-27,33,8.DOI:10.3969/j.issn.1005-2801.2026.08.005
煤层关键层压裂-造穴立体卸压增透技术及应用
Key Layer Fracturing-Cavity Forming and 3D Pressure Relief Permeability Enhancement Technology and Its Application in Coal Seams
刘瑞涛 1魏成谟2
作者信息
- 1. 山西潞安矿业(集团)有限责任公司古城煤矿,山西 长治 046100
- 2. 中国矿业大学(北京),北京 100083
- 折叠
摘要
Abstract
In order to effectively conduct pressure relief on coal seams under key layer control conditions,and improve the penetration rate and gas extraction efficiency of coal seams,this article takes the situation of the N3301 coal seam in Gucheng Mine,Shanxi Province as the engineering background,and based on key layer theory and breaking distance theory,the key layers of the overlying rock strata of the coal seam are analyzed,calculated,and identified.Combined with the geological conditions and geostress distribution status of coal rock strata,the stress and energy spatial field changes of the rock mass during the joint pressure relief process of the main and sub key layers are analyzed by FLAC3D simulation.The results show that after key layer hydraulic fracturing and implementing 3D gas governance technology of large aperture cavity formation with a diameter of 400 mm in the coal seam,the gas extraction effect is significantly improved,and can effectively conduct pressure relief and permeability enhancement on the coal seam.For ordinary boreholes,the gas extraction volume fraction is improved by 40%,and the gas extraction pure quantity is improved by 7.64 times;For cavity forming boreholes,the gas extraction volume fraction is improved by 21%,and the gas extraction pure quantity is improved by 1.6 times.关键词
关键层/水力压裂/大孔径造穴/瓦斯治理Key words
key layer/hydraulic fracturing/large aperture cavity formation/gas governance分类
矿业与冶金引用本文复制引用
刘瑞涛,魏成谟..煤层关键层压裂-造穴立体卸压增透技术及应用[J].山东煤炭科技,2026,44(8):21-27,33,8.
