采矿与安全工程学报2013，Vol.30Issue(2)：223-230,8.
建筑物下深部煤层二次条带开采研究
Research of secondary strip mining in a deep coal seam under the building structures
摘要
Abstract
In order to solve the problem of recovering coal resources under ground buildings at Linxi coal mine, combined with its geological conditions of large embedded depth and hard roof, smaller mining width and larger retaining width were adopted when strip mining, the secondary strip mining was carried out in the reserved coal pillar, after a period of time when the surface deformation stabilized. Based on the key strata theory, the strip mining and the secondary strip mining were studied by using the methods of the oretical analysis, numerical simulation and field measurement; the inferior key strata 1 was put forward as mining design basis; then the strip mining scheme can be determined, the mining width and retaining width were respectively 60 m and 120 m; the roadway driving along next goaf with narrow coal pillar was adopted when secondary strip mining, the mining width was 60 m and the retaining width was 55 m. The results show that the surface subsidence deformation is controlled by the inferior key strata 1; the destruction of surface deformation caused by strip mining and secondary strip mining to buildings is in damage grade I. The industrial test has been conducted at Nine-East area, then good results have been achieved.关键词
深部开采/坚硬顶板/关键层理论/条带开采/二次条带开采Key words
deep mining/ hard roof/ key strata theory/ strip mining/ secondary strip mining分类
矿业与冶金引用本文复制引用
方新秋,邹永洺,程远伟,杨海新..建筑物下深部煤层二次条带开采研究[J].采矿与安全工程学报,2013,30(2):223-230,8.基金项目
国家自然科学基金项目(50504014) （50504014）
江苏高校优势学科建设工程项目 （）
江苏省"青蓝工程"项目 （）
