陕西煤炭2025，Vol.44Issue(12)：63-69,7.DOI:10.20120/j.cnki.issn.1671-749x.2025.1209
110工法下煤层瓦斯储运特征及抽采参数优化研究
Coal seam gas storage and migration characteristics and extraction parameters optimization under 110 construction method
DONG Yanan 1QUAN Siyu 2WU Longquan2
作者信息
- 1. No.1 Coal Mine,Shaanxi Shanmei Huangling Mining Co.,Ltd.,Yan'an 727307,China
- 2. CCTEG Xi'an Research Instritute(Group)Co.,Ltd.,Xi'an 710077,China
- 折叠
摘要
Abstract
In order to further study the distribution and evolution law of mining-induced fractures in overburden strata under 110 construction method and guide the extraction of pressure-relieved gas in goaf,the No.1010 working face of Huangling No.1 Coal Mine is taken as the research background,and the research methods of field investigation and measurement,physical similarity simulation,numerical calculation and effect verification are combined to analyze the stress and displace-ment distribution law of mining-induced overburden strata,study the morphological characteristics of pressure-relieved gas storage and migration area,and optimize the drilling parameters of pressure-relieved gas extraction under 110 construction method.The results show that after coal seam mining,the floor stress is significantly reduced compared with that before coal seam mining,and the stress concentration factor fluctuates between 0.02 and 0.90.The mining-induced fractures in different overburden areas are mainly horizontal separation fractures,and the fracture angle in the vertical fracture area and the caving fracture area is concentrated at80°～120°.When the overlying strata is closer to the mining layer,the larger the subsidence displacement,the shorter the response time of roof subsidence.The displacement cloud diagram of overburden rock generally presents a trapezoid.The fracture angle of the open-off cut position is 55°～61°,and the fracture angle of the working face position changes in the range of 59°～62°.The width of the strain zone of the left and right waists of the trapezoid frame is about 22～27 m.According to the morphological characteristics of mining overburden fractures,the layout parameters of high-level boreholes in the rear roadway are designed to ensure the safe mining of the working face.关键词
110工法/采动覆岩裂隙/瓦斯储运特征/抽采参数优化Key words
110 construction method/mining-induced overlying strata fractures/gas storage and migration characteristics/extraction parameters optimization分类
矿业与冶金引用本文复制引用
DONG Yanan,QUAN Siyu,WU Longquan..110工法下煤层瓦斯储运特征及抽采参数优化研究[J].陕西煤炭,2025,44(12):63-69,7.
