本文選題：錨桿錨固 + 扭矩��； 參考：《安徽理工大學(xué)》2017年碩士論文

【摘要】：傳統(tǒng)支護體系采用端頭錨固或加長錨固錨桿支護效果差,難以控制復(fù)雜困難巷道條件下圍巖的有害變形,而全長錨固錨桿具有其支護剛度高且對圍巖變形和離層敏感的優(yōu)點,能夠有效防止巷道圍巖的變形。本論文以煤礦回采巷道端頭錨固和全長錨固錨桿支護為研究對象,采用理論分析、實驗室試驗及現(xiàn)場實測的綜合研究方法,分析了端頭錨固和全長錨固在不同預(yù)設(shè)參數(shù)條件下的錨固受力狀態(tài);在實驗室設(shè)計建立了 1:1錨固拉拔實驗系統(tǒng),配合液壓錨桿鉆機及手動油壓千斤頂,實現(xiàn)了垂直及水平荷載下2.5m全長樹脂錨固拉拔試驗,通過光纖光柵傳感技術(shù)在錨桿中的測試應(yīng)用,對錨桿進行受力監(jiān)測,研究了在不同垂直壓力、側(cè)壓系數(shù)、預(yù)緊力條件下,端頭錨固和全長樹脂錨固錨桿桿體軸力分布及承載特征;并且在煤礦巷道現(xiàn)場對光纖光柵測力錨桿進行受力監(jiān)測,驗證光纖光柵測力錨桿的應(yīng)用效果。研究結(jié)果表明:在相同拉拔力條件下,當(dāng)側(cè)壓系數(shù)不同時,圍巖水平壓力增大可以有效降低錨桿的軸力,其影響主要是集中于端頭錨固支護初期和對全長錨固支護后期;增大扭矩可以提高端頭錨固和全長錨固前期錨桿增阻速度和對圍巖的壓力。研究結(jié)果為煤礦回采巷道全長樹脂錨固錨桿支護提供了一定的理論依據(jù)。
[Abstract]:In the traditional support system, it is difficult to control the harmful deformation of surrounding rock under complex and difficult roadway conditions because of the poor support effect of end Anchorage or extended Anchorage bolt, while the full-length Anchorage bolt has the advantages of high supporting stiffness and sensitivity to surrounding rock deformation and separation. It can effectively prevent the deformation of roadway surrounding rock. This paper takes the end Anchorage and the full-length Anchorage bolt support of coal mining roadway as the research object, and adopts the comprehensive research method of theoretical analysis, laboratory test and field measurement. The anchoring force state of the end anchoring and the full-length anchoring under different preset parameters is analyzed, and the 1:1 anchoring and drawing experimental system is designed in the laboratory, which is combined with the hydraulic anchor drill and the manual hydraulic Jack. The full-length resin anchoring and drawing test of 2.5m under vertical and horizontal loads has been realized. Through the testing and application of fiber Bragg grating sensing technology in anchor rod, the force of anchor rod has been monitored and studied under different vertical pressure, lateral pressure coefficient and pretightening force. The axial force distribution and bearing characteristics of the end Anchorage and the full-length resin Anchorage bolt are analyzed, and the force of the FBG force-measuring bolt is monitored in the coal mine roadway to verify the application effect of the FBG force-measuring anchor rod. The results show that under the same pull-out force condition, when the lateral pressure coefficient is different, the axial force of the bolt can be effectively reduced by increasing the horizontal pressure of surrounding rock, which is mainly concentrated in the early stage of the end head anchor support and the late stage of the full-length anchor support. The increase of torque can increase the resistance speed and the pressure on the surrounding rock of the anchor rod in the early stage of the end Anchorage and the full-length Anchorage. The results provide a theoretical basis for the full-length resin Anchorage bolt support of coal mining roadway.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD353

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