矿业科学学报2025，Vol.10Issue(2)：292-304,13.DOI:10.19606/j.cnki.jmst.2025002
煤层抽采钻孔用高性能微泡沫钻孔冲洗液研制
Study on high-performance micro foam drilling flushing fluid for coal seam extraction drilling
摘要
Abstract
In order to solve the problem that the traditional clean water and anhydrous flushing fluid are easy to cause borehole deformation and collapse,a microfoam borehole rinsing fluid system was con-structed by optimizing the foaming agent,foam stabilizer,bentonite and filtration loss reducing agent,and the similar material model of the soft coal seam was established through indoor simulation experi-ments,and the simulation experiment of the extraction borehole was carried out to analyze the hole pro-tection effect of the microfoam borehole flushing fluid.The results show that:① The microfoam drilling and rinsing fluid system has moderate viscosity,good rheological properties,high dynamic plastic ratio,small filtration loss,density of 0.38 g/cm3,and half-life of over 90 h,It has a thick hydration film,strong stability,and a normal distribution of particle size,with an average particle size of 158 μm.② The rock-carrying capacity of microfoam drilling flushing fluid is about 67 times that of clean water.③ The expansion of the coal seam rock sample in the microfoam borehole flushing fluid was 0.2 mm,and the rolling recovery rate was 96.4％,indicating that the microfoam borehole flushing fluid had good inhibition performance and could maintain the stability of the hole wall of the gas extraction bore-hole.④ The microfoam borehole flushing fluid has good temperature resistance and good hole protection effect,which can effectively prevent water from seeping into the coal seam and prevent the instability and collapse of the hole wall of the extraction borehole.关键词
钻孔瓦斯抽采/微泡沫钻孔冲洗液/性能评价/护孔效果Key words
drilling gas extraction/micro foam drilling flushing fluid/performance evaluation/hole protection effect分类
矿业与冶金引用本文复制引用
张学博,屈朕,王攀,潘荣锟..煤层抽采钻孔用高性能微泡沫钻孔冲洗液研制[J].矿业科学学报,2025,10(2):292-304,13.基金项目
国家自然科学基金(52274186,52274187) （52274186,52274187）
河南省高校科技创新团队(24IRTSTHN018) （24IRTSTHN018）
