采矿与安全工程学报2017，Vol.34Issue(4)：650-654,5.DOI:10.13545/j.cnki.jmse.2017.04.007
条带残留煤柱膏体充填综采技术研究与应用
Research and application on the technology of paste backfilling fully mechanized in residual strip pillar
摘要
Abstract
In order to fully exploit the resources of coal pillar after strip mining under buildings, the stability of coal pillar, the structure characteristics of overlying strata, and the technical parameters of paste filling on paste backfilling in coal pillar after strip mining were explored through theoretical anal-ysis and field practice, and at such parameters as the proper strength of paste filling body, filling ratio, and the width of coal pillar were obtained. Research has shown that the proper width of coal pillar after strip mining is 5 m; the filling ratio shall not be less than 70%; when the safety factor is 1.5-2.0 and the width of coal pillar is less than 50 m, the strength of backfill material after 28 days is not less than 5 MPa; when the width of coal pillar is less than 100 m, the strength of backfill material after 28 days is not less than 2.6 MPa. According to the production technical conditions of Daizhuang Coal Mine in Jibei mining area, the study has suggested recovery technology of paste filling after strip mining, and the reasonable process parameters have been given. The measured results have shown that the maximum surface subsidence is 220 mm and subsidence coefficient is 0.076 after the full recovery of the paste filling mining, which achieved a good control effect of surface subsidence.关键词
条带煤柱/围岩控制/膏体充填/地表沉陷Key words
strip pillars/surrounding rock control/paste backfilling/surface mining subsidence分类
矿业与冶金引用本文复制引用
孙希奎,赵庆民,施现院..条带残留煤柱膏体充填综采技术研究与应用[J].采矿与安全工程学报,2017,34(4):650-654,5.基金项目
山东省泰山学者专项经费项目(201309) （201309）
国家自然科学基金项目(51474209) （51474209）
