The new technology of waste-filling replacement mining on strip coal pillar

作者：Xikui Sun, Xuehua Li · 发表于：Meitan xuebao · 年份：2008 · 被引用次数：11 · 研究领域：Geomechanics and Mining Engineering、Geoscience and Mining Technology、Civil and Geotechnical Engineering Research

New technology for driving roadways in strip coal pillar mining and filling with coal refuse is put forward. The place and number of roadways to be waste-filled was studied and overlying strata structure before and after replacement mining was analyzed. Based on the principal that a core exists in the pillar after replacement mining, two filling roadways were laid together in the center with high-width size of 4.0 and 5.0 m and a pillar width of 4.0 m in the roadway, this technical project was practiced in a coal mine. The results show that under the precondition that the earth's surface deformation can be controlled in Grade I, waste-filling replacement technology can recover about 15% of the strip coal pillar, and the coal refuse can be disposed of underground. 16 refs., 4 figs., 2 tabs.