煤炭工程 ›› 2018, Vol. 50 ›› Issue (1): 36-41.doi: 10.11799/ce201801011

• 施工技术 • 上一篇    下一篇

深部软岩锚注支护巷道围岩变形机理研究

翟新献1,涂兴子1,李如波2,李明远3,李鹏远1,郭春生2   

  1. 1. 河南理工大学
    2. 平顶山天安煤业股份有限公司
    3. 淮北市平远软岩支护工程技术有限公司
  • 收稿日期:2017-08-16 修回日期:2017-10-01 出版日期:2018-01-20 发布日期:2018-04-18
  • 通讯作者: 翟新献 E-mail:zhaixx1963@126.com

Deformation mechanism of surrounding rocks of deep and soft rock roadway with bolt-grouting in Pingdingshan No.8 Coal Mine

  • Received:2017-08-16 Revised:2017-10-01 Online:2018-01-20 Published:2018-04-18

摘要: 深部软岩巷道围岩变形控制问题一直是煤矿研究的重点和难点。论文以平顶山八矿丁四采区轨道下山巷道为工程背景,采用现场工业性试验和数值模拟计算,对锚喷和锚注支护两种支护条件下,巷道围岩变形破坏机理进行了研究。研究结果表明:①与锚喷支护相比,锚注支护巷道浅部围岩的高应力区向深部围岩转移,巷道浅部围岩处于应力降低区,改善了巷道围岩应力环境|②锚注支护巷道围岩的位移量均小于锚喷支护对应位置围岩的位移量,所以锚注支护对巷道顶板和两帮起到有效的控制作用。提出并实施了巷道围岩二次注浆技术措施,研究了注浆工艺和注浆参数。实施后巷道围岩变形得到了有效控制。

关键词: 深部软岩巷道, 锚注支护, 变形机理, 数值模拟, 二次注浆技术

Abstract: Deformation control issue of surrounding rocks of deep and soft rock roadway has been the focus and difficulty at coal mines studies. Take the track-down roadway of district D four in Pingdingshan No.8 Coal Mine as engineering background, use in-situ industrial test and numerical simulation,the paper studied the mechanism of surrounding rocks deformation and failure of roadway in two kinds of support conditions with bolt-shotcreting and bolt-grouting support. The results showed that: (1) Compared with the bolt-shotcreting, higher stress zone into shallow surrounding rock of bolt-grouting roadway is shifted to deep surrounding rocks of roadway, so that the shallow surrounding rocks area is in lower stress zone, which improves the surrounding rock stress of roadway. (2) The displacement of roadway surrounding rocks with bolt-grouting is less than that of corresponding positions of roadway surrounding rocks with bolt-shotcreting, So bolt-grouting support plays an effective role in control strata deformation of roof and floor and two sides of roadway. The authors proposed and implemented the measures of secondary grouting technology of roadway, studied grouting process and grouting parameters. After the implementation of field test, roadway deformation has been effectively controlled.

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