近水平煤层矩形巷道锚固参数确定及数值实验  

Determination of parameters and numerical experiment in rectangular approximately horizontal coal roadway

作　　者：于永军[1] 梁卫国[1] 张百胜[1] 刘克同[2] 

机构地区：[1]太原理工大学采矿工艺研究所,山西太原030024 [2]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《辽宁工程技术大学学报（自然科学版）》2014年第7期917-922,共6页Journal of Liaoning Technical University (Natural Science)

基　　金：国家杰出青年科学基金资助项目(51225404)

摘　　要：根据超静定理论,给出计算锚固参数的解析表达式.以山西大同地煤青瓷窑煤矿为研究背景,模拟当角锚杆倾斜角度改变时,锚杆最大剪应力及顶板垂直位移随倾角变化规律.研究结果表明:当该矩形巷道顶板所有锚杆均采用垂直布置时锚杆上最大剪应力及顶板位移均比较小,从塑性分析角度,验算在这种支护方案下锚杆不会进入塑性屈服,顶板岩层不会冒落,可以满足工程需要,所得结论对工程实际应用具有指导意义.The analytical calculation expressions were obtained based on the hyperstatic theory from mechanics of structures. Stimulation was applied for the changeable law of maximum shearing stress of bolt and vertical displacement of roof while changing the obliquity of side-bolts. The result indicates that maximum shearing stress and vertical displacement are small when all the bolts are placed vertically. In the end, it is verified that the bolts will not yield plastically and roof will not occur brittle fracture from the aspect of mechanics of plasticity. The conclusion has practical values for the factual coal mining engineering.

关 键 词：超静定组合岩梁 矩形巷道 锚杆支护参数 数值模拟 塑性理论 

分 类 号：TD263[矿业工程—矿井建设]