采矿与安全工程学报2011，Vol.28Issue(2)：298-303,6.
覆岩采动裂隙带动态演化模型的实验分析
Experimental Analysis of Dynamic Evolution Model of Mining-Induced Fissure Zone in Overlying Strata
摘要
Abstract
In order to study the evolution law and distribution features of mining-induced fissure in overlying strata, based on the O-shaped circle law, the engineering simplified model of mining-induced fissure round-rectangle trapezoidal zone is put forward, and the dynamic evolution process is analyzed with the model experiment.The evolution height, strike zone width,dipping zone width, and break angle are obtained.The result shows that 1) the zone width of starting cut is about the first weighting step, 2) the zone width of face is changing between 2～3 times of period weighting step, 3) the zone width near intake entry and return entry is about 0.7～0.8 times of the first weighting step, and 4) the height of trapezoidal surface is basically subject to the location of the key strata, deformation, and breaking and instability form of the voussoir beams structure.The main influencing factors of mining-induced fissure zone pattern,such as mining height, lithology of overlying strata, dipping angle of coal seam, and geometric parameters of face are analyzed, indicating that the ultimate position of methane drainage boreholes or roadways can be determined and the high relieved methane can be degassed.关键词
采动裂隙/圆角矩形梯台带/模型参数/影响因素Key words
mining-induced fissure/ round-rectangle trapezoidal zone/ model parameters/ influencing factors分类
矿业与冶金引用本文复制引用
林海飞,李树刚,成连华,王红胜..覆岩采动裂隙带动态演化模型的实验分析[J].采矿与安全工程学报,2011,28(2):298-303,6.基金项目
国家自然科学基金项目(50874089) （50874089）
高等学校博士学科点专项科研基金项目(20096121110002) （20096121110002）
陕西省教育厅科研计划项目(2010JK681) （2010JK681）
