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王東紅

（ 陜西鐵道工程勘察有限公司 ，陜西 西安 710000)

摘   要 ：為解決松軟多節理巷道大變形問題 ，以象山礦21501 運輸巷道為工程實例 ，通過現場勘測及鉆孔窺視，分析了巷道圍巖變形破壞機制及塑性區范圍。基于三軟煤層巷道圍巖控制理論，提出了“超前管棚 ＋長錨 索 + W 鋼帶／工字鋼＋雙層網 ”優化支護方案 ，通過數值模擬和工程實踐驗證支護方案的可行性。結果表明：采用優化支護方案后 ，巷道兩幫及頂底板收斂速度得到有效降低，巷道兩幫及頂底板收斂量分別為133. 2 、175. 5 mm , 保證了松軟多節理巷道的長期穩定。

關鍵詞：松軟多節理 ；大變形 ；鉆孔窺視 ；圍巖控制 ；長期穩定

中圖分類號：TD353           

文獻標志碼：A            

文章編號： 1005- 8249  (2024)  04- 0097- 06 

DOI:10. 19860/j.cnki.issn1005 - 8249.2024.04.017

 

WANG Donghong

(Shaanxi Railway Engineering Survey Co. ，Ltd. ，Xi ’an 710000 ,  China)

Abstract: In order to solve the problem of large deformation of soft and multi-jointed roadway, 21501 transport roadway of Xiangshan Mine is taken as an engineering example, and the deformation and damage mechanism of the roadway perimeter rock and the range of plastic zone are analysed through on-site investigation and drilling peeping. Based on the theory of three-soft coal seam roadway rock control, the optimised support scheme of "over-head pipe shed + long anchor cable + W steel belt / I-beam + double-layer mesh" is proposed, and the feasibility of the support scheme is verified through numerical simulation and engineering practice. The test results show that after adopting the optimised support scheme, the convergence speed of the two gangs and the top and bottom plates of the roadway is effectively reduced, and the convergence amount of the two gangs and the top and bottom plates of the roadway is 133.2 mm and 175.5 mm respectively, which ensures that the loose and soft multi-jointed roadway can be protected.This ensures the long-term stability of the loose and soft multi-jointed roadway.

Keywords: soft multi-sectional; large deformation; borehole peeping; surrounding rock control; long-term stability

作者簡介： 王東紅  (1987—) ,   男 ，本科 ， 工程師 ，研究方向 ：巖土工程勘察工作。

收稿日期：2023- 06- 12