采矿与安全工程学报Issue(5)：716-720,5.
急斜特厚煤层水平分段综放开采覆层类椭球体结构分析
Overlying strata ellipsoid-style structure of horizontal section top-coal caving in steeply inclined and extra thick coal seam
摘要
Abstract
It is crucial to predict the structure stability of overlying strata in steeply inclined and extra thick coal seams applying horizontal section top-coal caving (HSTCC) method. In this paper, aimed at safe miming in steeply inclined and extra thick coal seams of Urumqi mine region, the formative pro-cess and dynamical evolutionary regularity of ellipsoid-style structure of overlying strata in HSTCC condition were studied by using theoretical analysis, numerical computation and field monitoring. The results show that the non-symmetrical trend of vertical deformation is remarkable at HSTCC working face of steeply inclined and extra thick coal seam. Meanwhile, the non-symmetrical arch can be formed due to the composition of top-coal and residual overlying gangue. Sequentially the unique and steep el-lipsoid-style structure will be formed dramatically. Finally, the coal-rock mass in the arch angle and apex is slided, and causes the distortion of local rock pressure, even induces dynamic hazards around working face. The results can provide guidance for the design of strata structure and height, and the prevention of dynamic hazard in steeply inclined and extra thick coal seams.关键词
急斜特厚煤层/覆层/煤岩动态演化/类椭球体结构/失稳致灾Key words
steeply inclined and extra thick coal seams/overlying strata/dynamical evolution of coal-rock/ellipsoid-style structure/instability and inducing hazard分类
矿业与冶金引用本文复制引用
来兴平,孙欢,单鹏飞,邱华富..急斜特厚煤层水平分段综放开采覆层类椭球体结构分析[J].采矿与安全工程学报,2014,(5):716-720,5.基金项目
国家自然科学基金重点项目(U13612030)；陕西省重点科技创新团队计划项目(2013KCT-16)；陕西省自然科学基金重点项目(2011JZ010) （U13612030）
