【摘要】 在阐述回采巷道顶板锚杆组合作用的基础上,给出了直接顶范围内岩层分层之间发生离层所必须满足的载荷、跨度、挠度三个条件.在指出锚杆组合作用下组合梁内的岩层组合属于关键分层之间组合的基础上,进一步依据变形协调一致的原则,推导出了回采巷道顶板锚杆支护中锚杆预紧力计算公式.该研究对回采巷道顶板锚杆支护设计具有一定的指导意义和参考价值.图4,表1,参6.更多还原

【Abstract】 On the basis of bolt combined effect in the roof of mining roadway,three conditions of load、span and deflection were given,which must be satisfied for delamination-terrane bed separation in the range of immediate roof. In accordance with strata combination of composite beams belongs to combination in key delamination on bolt combined effect,on the basis of principle of deformation coordination uniform,calculation formulas were deduced that of bolt pre-tightening force on bolt support in the roof of mining roadway. 4figs.,1tab.,6refs.更多还原