Cheng Jianwei, Ma Zhiyuan, Wang Yu, Fu Qiang, Ran Dezhi, Ma Yongzhen, Yang Chengtao, Hu Xincheng, Chu Tingxiang
School of Safety Engineering, China University of Mining &Technology, Xuzhou 221116, China.
Henan Energy and Chemical Industry Group Research Institute Co. Ltd, Zhengzhou 450046, China.
Heliyon. 2023 May 26;9(6):e16603. doi: 10.1016/j.heliyon.2023.e16603. eCollection 2023 Jun.
Gas extraction is an important way to solve coal mine gas in China. At present, the development of new and more efficient gas sealing materials is an urgent problem in China's coal mining industry. In order to improve the gas extraction efficiency and promote the development and utilization of coalbed methane, we developed a new inorganic slow setting material which used bentonite as main material. We added two kinds of organic modified materials and two kinds of inorganic modified materials to optimize the sealing performance, and analyzed the viscosity, sealing and particle size changes after modification. The rheological properties and diffusion properties of sealing materials was studied. Meanwhile, field experiments were carried out to verify that it has more efficient sealing performance than traditional cement materials and could improves the efficiency of gas drainage and reduces mine gas disaster accidents.
瓦斯抽采是我国解决煤矿瓦斯问题的重要途径。目前，开发新型高效的瓦斯密封材料是我国煤炭开采行业亟待解决的问题。为提高瓦斯抽采效率，促进煤层气的开发利用，我们以膨润土为主要原料研制了一种新型无机缓凝材料。添加了两种有机改性材料和两种无机改性材料以优化密封性能，并分析了改性后的粘度、密封性和粒径变化。研究了密封材料的流变性能和扩散性能。同时进行了现场试验，验证其具有比传统水泥材料更高效的密封性能，可提高瓦斯抽采效率，减少煤矿瓦斯灾害事故。
