大采高工作面沿空掘巷合理位置模拟与应用

根据大采高沿空掘巷的力学环境建立了窄煤柱的弹塑性力学模型，运用求解非线性大变形问题有限差分法（FLAC^2D4．0）程序，初步得到了大采高面窄煤柱内的塑性场、位移场和应力场分布规律．研究结果表明，大采高窄煤柱内塑性区呈上大下小的倒斜梯形，范围达4～6m，巷道两帮水平位移呈不均匀不对称的移动规律，距采空区一侧边缘7m为支承应力远边界，是巷道布置的合理位置，实际应用效果比较明显．

Simulation and Application of Suitable Position of Gob-Side Driving Entry in Large Mining Height Face

A plastic-elastic mechanical model of narrow coal pillar was proposed based on mechanical environment of gob-side driving entry in large mining height face.The distribution of plastic field,displacement field and stress field in narrow pillar in large mining height face were primarily obtained by using the finite difference procedure(FLAC~(2D) 4.0) to solve the problem of nonlinear large deformation.The research results indicate that 1) the plastic field of 4 ~ 6 m of narrow pillar in large mining height face is reversely ladder-shaped with a large top and a small bottom,and 2) the horizontal deformation of both sides of the roadway is irregular and nonlinear,and the far boundary of abutment is 7 m far away from one side of the waste,which is the suitable position of gob-side driving entry.