煤巷顶板岩层锚固系统稳定性影响因素试验分析.docx

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太原理二J .火学硕士研究生于"
此外,试验中还发现一些问题,如锚杆受力随巷道开挖宽度的增加会存在拐点,随开挖增加,锚杆受力先增加后减小;材料的流变特性也会有影响等。
关键词: 层状结构,预紧力,数值模拟,试验研究,剪胀锚同理论, 顶板
离层
Å 原理u:太华:硕士研究生学校论文
EXPERIl\伍NTAL RESEARCH ON AFFECTING FACTORS OF TI-IE ROOF ANCHORAGE ST此t\T. A
STABILITY OF THE COAL ROADWAY
ABSTRACT
The roof t of the coaJ minc during a singJc period usually don't Jikc gas and penηeable accidents,hut it has a higher probability of occuηence. The casualtics caused by it accountcd for about 30% of thc total casu roof accident takes up large greater propo rtion in the " five big disasters ". Besides
the plicated surrounding conditions and coal mining techno logy conditions,the immaturity for the reinforcement and supporting theory of the surroundin g rock is one of the important reasons causing this result . The roof accident in the extraction bears the belJ in the roof accidents ,therefore , cxploring the t roof supporting theory,ting safc and reJiablc
supporting method ,setin g economic reasonable supporting parameters and
practical effici ent construction cra且 have 巳 a major theore tical and
technical subj ect which people try to solve in the long terffi.
Based on analog simulation experiment for the anchor system in the
roof ,comprehensive considcrat ion of the coal mine,throu gh the roof similar
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太原理Ll:大学硕士研究生学位论文
simu lation test in laboratory,on the basis prehensive analysis of previous theoretical achievements,thÏs paper probed into the stabil ity factors with th e roof anchorage system in the roadway,and analyzed the m echanical
mechanism of the anchor rock and stress distribution of anchorage system by theoretical analysis,laboratory analog simulation ,and numerical simulation , etc.
Through the research into the process,phenomenon and data of the t ,and numerical simulation's val idation ,thc paper obtained some veJγmeaningful results ,and found some neoteric problems. Summar i zed as
follows:
Under the action of a certain Pre伊 tightening force,the de