基于矸石动力混凝土及泵送充填系统的沿空留巷技术  

Gob- side Entry Retaining Technology Based on Gangue Dynamic Concrete and Pump Filling System

作　　者：冯飞胜[1] 朱萌萌[1] 任禹[1] 孙振平[1] 樊俊鹏 

机构地区：[1]安徽理工大学煤矿安全高效开采省部共建教育部重点实验室,安徽淮南232001

出　　处：《煤矿安全》2014年第2期70-72,共3页Safety in Coal Mines

基　　金：山东省矿山灾害预防控制国家重点实验室培育基地开放基金资助项目(MDPC2012KF02)

摘　　要：针对目前煤矿煤炭回收率低、矸石上井和地面沉降等重大技术难题,开展矸石动力混凝土置换煤柱的沿空留巷技术研究。首先对制作的矸石动力混凝土强度进行测试,实验结果表明:矸石动力混凝土1 d平均强度达到10.739 MPa;28 d强度达到27.659 MPa,完全满足沿空留巷巷旁支护要求;其次优化泵送矸石混凝土充填系统。现场工业性试验表明,该技术达到了成功沿空留巷的目的,实现混凝土充填、出煤2套系统互不干扰,增强了煤矿井下开采的安全性,提高了劳动生产率及煤炭回收率。Aimed at the fatal technology problem of lower coal recovery ratio, gangue discharging from mine and surface subsidence ete, gob - side entry retaining technology of replacing pillar with gangue dynamic concrete was studied. First, the strength of gangue dynam- ic concrete was tested, the results showed that 1 d average intensity of gangue dynamic concrete was 10.638 MPa and 28 d average in- tensity was 26. 780 MPa, which completely satisfied the required of gob- side entry retaining supporting; secondly, pumped gangue concrete filling system was put forward. Finally, field industrial test showed that the technology successfully reached the purpose of gob - side entry retaining, achieved non - interference of concrete filling and producing coal system, enhanced underground mining safety, improved labor productivity and coal recovery ratio.

关 键 词：矸石混凝土 水灰比 抗压强度 充填系统 沿空留巷 巷旁支护 

分 类 号：TD823[矿业工程—煤矿开采]