复合固结体巷式充填全采技术应用研究

Application of Full Mining by Stowing Roadway with Combined Induration Body

针对建下不规则煤层块段开采问题,根据充填控制地表沉陷的原理,提出了高水速凝材料与矸石复合固结体巷式充填全采技术,即首先掘进煤巷,然后充填复合固结体,以多轮置换方式实现充填区域煤炭的全部开采。通过充填体强度测试,研究了复合固结体强度与高水速凝材料水灰比、矸石掺入量、龄期之间的关系。经充填体稳定性需求分析,给出了确定充填体强度的方法。工程应用结果表明,该技术既可有效控制地表沉陷,又可避免矸石升井带来的环境危害,取得了良好的技术经济效果。

For anomalistic coal mining under buildings, this paper put forward a technology of full mining by stowing roadway with combined induration body which included high-water-content quick-setting material and waste rock on the basis of subsidence control theory of stowing. After coal roadway was driven, combined induration body was stowed into the roadway. Coal was fully mined by repeatedly replaced. It also researched the relationship of combined induration body strength and high-water-content quick-setting material＇s ratio of water to ash and refuse quantity and time with strength test of stowing body. It presented a method for determining stowing body strength by analyzing stability requirement. Practical application showed that this technology might control effectively surface subsidence and avoid refuse pollution. Good technical and economic effect has made.