中国矿业
中國礦業
중국광업
CHINA MINING MAGAZINE
2014年
6期
112-115
,共4页
破碎围岩%棚-索补偿支护%FLAC3D
破碎圍巖%棚-索補償支護%FLAC3D
파쇄위암%붕-색보상지호%FLAC3D
fragmentized surrounding rock%compensating support of frame and anchor cable%FLAC3D
为了解决架棚支护中棚体的破坏问题，以二矿盘区皮带巷为研究对象，综合运用工程测试、理论分析和数值模拟手段，研究了棚‐索支护补偿前后棚体、围岩的应力分布状况，分析了补偿支护的机理，设计了棚‐索补偿支护方案，并进行工业性实验，结果表明：现用棚‐索支护中锚网与架棚彼此独立，棚架弯矩呈正弦函数分布，直墙帮、水平方向27°和69°弯矩较大，最大值为52.48kN · m ，超过了其屈服弯矩，直墙段易首先发生破坏；棚‐索补偿支护后，棚架受力环境得到了很好的改善，最大弯矩10.58kN · m ，仅为屈服弯矩的21.7％，较补偿支护前降低了79.8％；锚网支护的组合拱效果得以加强，巷道周围形成了1.2～3.6m厚的压应力增高区，棚架至今未发生明显变形。
為瞭解決架棚支護中棚體的破壞問題，以二礦盤區皮帶巷為研究對象，綜閤運用工程測試、理論分析和數值模擬手段，研究瞭棚‐索支護補償前後棚體、圍巖的應力分佈狀況，分析瞭補償支護的機理，設計瞭棚‐索補償支護方案，併進行工業性實驗，結果錶明：現用棚‐索支護中錨網與架棚彼此獨立，棚架彎矩呈正絃函數分佈，直牆幫、水平方嚮27°和69°彎矩較大，最大值為52.48kN · m ，超過瞭其屈服彎矩，直牆段易首先髮生破壞；棚‐索補償支護後，棚架受力環境得到瞭很好的改善，最大彎矩10.58kN · m ，僅為屈服彎矩的21.7％，較補償支護前降低瞭79.8％；錨網支護的組閤拱效果得以加彊，巷道週圍形成瞭1.2～3.6m厚的壓應力增高區，棚架至今未髮生明顯變形。
위료해결가붕지호중붕체적파배문제，이이광반구피대항위연구대상，종합운용공정측시、이론분석화수치모의수단，연구료붕‐색지호보상전후붕체、위암적응력분포상황，분석료보상지호적궤리，설계료붕‐색보상지호방안，병진행공업성실험，결과표명：현용붕‐색지호중묘망여가붕피차독립，붕가만구정정현함수분포，직장방、수평방향27°화69°만구교대，최대치위52.48kN · m ，초과료기굴복만구，직장단역수선발생파배；붕‐색보상지호후，붕가수력배경득도료흔호적개선，최대만구10.58kN · m ，부위굴복만구적21.7％，교보상지호전강저료79.8％；묘망지호적조합공효과득이가강，항도주위형성료1.2～3.6m후적압응력증고구，붕가지금미발생명현변형。
In order to solve destruction of shed body in frame support , methods of engineering test , theoretical analysis and numerical simulation were used comprehensively in panel belt roadway in NO . 2 coal mine to separately study the stress distributions in shed body and rock under the condition of with and without frame-anchor support . After having analyzed mechanism of compensation support , support scheme was designed and industrial experiment was conducted . The results show that bolt-mesh and frame used in frame-anchor support are independent of each other , the distribution of bending moment in shed body likes sine function .The maximum bending moment occur on straight walls ,on the direction of horizontal 27 ° and69°andthevalueis52.48kN·m.Itisgreaterthantheyieldmoment,whichmakesstraightwall breaks down easily . The force situation has been improved well after adoption of frame-cable support and the maximum bending moment is 10 .58kN · m .It is 21 .7% of the yield moment value ,which is reduced 79.8% compared with the situation without adoption of compensation support . The effect of combined arch brought by bolt-mesh support is greater than before and it forms the stress increased area ,which thickness is 1 .2m to 3 .6m ,around the roadway .The shed body has no significant deformation till now .
