由中国矿业大学承担,徐州矿务局庞庄煤矿、生产技术处协作的国家“七、五”科技攻关项目“灰渣应用于井下充填的研究”于1991年6月28日在中国统配煤矿总公司技术发展局主持下通过部级鉴定。课题组成员通过近五年的努力,成功地研制出一类“高水灰渣充填材料”。专家们认为,这类以国产化硫铝酸盐水泥(熟 By the China University of Mining, Xuzhou Mining Bureau Pangzhuang coal mine, the production technology department collaboration “seven, five” scientific and technological project “research on the application of ash in underground filling” on June 28, 1991 in China with the coal mine Technology Development Council under the auspices of the Ministry of ministerial appraisal. After nearly five years of hard work, the research team successfully developed a kind of “high water and ash filling material”. Experts believe that such type of domestic production of sulphoaluminate (cooked