采矿与安全工程学报2016，Vol.33Issue(3)：387-392,6.DOI:10.13545/j.cnki.jmse.2016.03.002
急倾斜特厚煤层开采相似材料模拟试验研究
Similar material simulation test of steep-inclined extra-thick coal seam
摘要
Abstract
Similar material simulation test has been applied to research the motion of overlying strata and the characteristics of fracture development of steep-inclined extra-thick coal seam mining by hori-zontal section top coal caving. The proportion of coal seam has been chosen as cement∶sand∶water∶activated carbon∶coal=6∶6∶7∶1.1∶79.9 by low strength mechanical test and orthogonal test with the density of 0.913 g/cm3 and uniaxial compressive strength of 0.076 MPa. The result of similar mate-rial simulation test has shown that 1) The overlying strata caving occurs as an integrity only after two or three mining levels have been mined; 2) The overlying strata of shallow mining levels move coordi-nately before caving; 3) In the deep mining level, hinge structure is formed between adjacent mining levels; 4) When the mining activity goes deeper, roof gets completely destroyed and caved after each mining level is mined; 5) The characteristics of abscission layer and fracture development are consis-tent with the motion of overlying strata; the depth of pressure relief is about 15 m.关键词
急倾斜特厚煤层/相似材料模拟/配比试验/覆岩运动/底板卸压Key words
steep-inclined very thick coal seam/similar material simulation test/proportioning test/overlying strata movement/pressure relief of floor分类
矿业与冶金引用本文复制引用
程卫民,孙路路,王刚,黄旭超,黄启铭..急倾斜特厚煤层开采相似材料模拟试验研究[J].采矿与安全工程学报,2016,33(3):387-392,6.基金项目
国家自然科学基金项目(51304128)；山东省自然科学基金项目(ZR2013EEQ015)；山东科技大学研究生创新基金项目(YC140101) （51304128）
