煤
煤
매
COAL
2015年
8期
10-13
,共4页
高瓦斯矿井%高强度玻璃钢锚杆%破断载荷%围岩变形
高瓦斯礦井%高彊度玻璃鋼錨桿%破斷載荷%圍巖變形
고와사광정%고강도파리강묘간%파단재하%위암변형
high gassy coal mine%high strength fiber reinforce plastic cable%broken load%rock deformation
高瓦斯煤矿采区巷道工作面侧支护采用的普通玻璃钢锚杆强度低、抗扭性差,延伸率低。针对以上问题开发了高强度玻璃钢锚杆,通过实验室试验高强度玻璃钢锚杆极限载荷220 kN,最大可施加扭矩到达420 N· m。采用数值软件FLAC3D ,对采用高强度玻璃钢锚杆在不同回采条件下的巷道受力状态进行了分析,最大垂直应力为20.4 MPa,最大水平应力为18.6 MPa。在N3-9工作面胶带巷进行了试验,实践表明两帮最大位移量为25 mm,顶板最大下沉量为13 mm,巷道变形量较小,试验效果理想。
高瓦斯煤礦採區巷道工作麵側支護採用的普通玻璃鋼錨桿彊度低、抗扭性差,延伸率低。針對以上問題開髮瞭高彊度玻璃鋼錨桿,通過實驗室試驗高彊度玻璃鋼錨桿極限載荷220 kN,最大可施加扭矩到達420 N· m。採用數值軟件FLAC3D ,對採用高彊度玻璃鋼錨桿在不同迴採條件下的巷道受力狀態進行瞭分析,最大垂直應力為20.4 MPa,最大水平應力為18.6 MPa。在N3-9工作麵膠帶巷進行瞭試驗,實踐錶明兩幫最大位移量為25 mm,頂闆最大下沉量為13 mm,巷道變形量較小,試驗效果理想。
고와사매광채구항도공작면측지호채용적보통파리강묘간강도저、항뉴성차,연신솔저。침대이상문제개발료고강도파리강묘간,통과실험실시험고강도파리강묘간겁한재하220 kN,최대가시가뉴구도체420 N· m。채용수치연건FLAC3D ,대채용고강도파리강묘간재불동회채조건하적항도수력상태진행료분석,최대수직응력위20.4 MPa,최대수평응력위18.6 MPa。재N3-9공작면효대항진행료시험,실천표명량방최대위이량위25 mm,정판최대하침량위13 mm,항도변형량교소,시험효과이상。
The normal fiber reinforce plastic cable was used on working face side of entry in gassy coal mine last, but strength , resist-ance to torsion, extensibility ration were low.So a new style high strength fiber reinforce plastic cable was developed.The maximal broken load was 220 kN, the maximal twist was 420 N· m.then the stress distribution around the N3-9 belt entry was analyzed by number software FLAC3D , the maximal vertical stress was 20.4 MPa, and the maximal horizontal stress was 18.6 MPa.The test was carried in N3-9 belt entry;the maximal convergence between two sides was 25mm, the maximum roof subsidence was 13mm,the re-sult was good.