基于松动圈理论的破碎岩体锚杆支护参数确定及应用
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摘要
锚杆支护计算理论的选取直接影响巷道围岩支护效果。针对锦丰金矿巷道围岩破碎条件,进行巷道围岩松动圈测试;根据松动圈测试结果确定选用组合拱理论为锦丰金矿锚杆支护计算理论,计算确定锦丰金矿巷道支护参数;并进行现场支护试验,同步监测锚杆受力情况,最终确定锦丰金矿巷道支护最优参数为:锚杆间距1.2 m,锚杆排距1.2 m,锚杆长度2.4 m。工程应用结果表明:通过松动圈大小确定锚杆支护计算理论,可以使选取的支护理论更贴近矿山实际,对其他矿山的锚杆支护参数设计具有指导意义。
The selection of bolt support theory directly influences the surrounding rock support effect.Since the surrounding rocks are broken in Jinfeng Gold Mine,the loose circle test was carried out.According to the test results,the build-up arch theory was decided to be the bolt support calculation theory for Jinfeng Gold Mine,the roadway support parameter in Jinfeng Gold Mine are decided by calculation,field support test was carried out,the bolt stress conditions were monitored simultaneously and the optimum roadway support parameters in Jinfeng Gold Mine were decided as follows:the interval of bolts is 1.2 m,the row interval is 1.2 m,the bolt length is 2.4 m.Engineering practice shows that the determination of bolt support calculation theory by loose circle size can make the selected support theory more practical to the mine,and has guiding significance for the bolt support parameter design in other countries.
The selection of bolt support theory directly influences the surrounding rock support effect.Since the surrounding rocks are broken in Jinfeng Gold Mine,the loose circle test was carried out.According to the test results,the build-up arch theory was decided to be the bolt support calculation theory for Jinfeng Gold Mine,the roadway support parameter in Jinfeng Gold Mine are decided by calculation,field support test was carried out,the bolt stress conditions were monitored simultaneously and the optimum roadway support parameters in Jinfeng Gold Mine were decided as follows:the interval of bolts is 1.2 m,the row interval is 1.2 m,the bolt length is 2.4 m.Engineering practice shows that the determination of bolt support calculation theory by loose circle size can make the selected support theory more practical to the mine,and has guiding significance for the bolt support parameter design in other countries.
引文
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[2] 周传福.锚杆悬吊作用原理在软岩巷道施工中的应用[J].煤炭技术,2004,23(11):86-87.
[3] 董方庭.井巷设计与施工[M].徐州:中国矿业大学出版社,1994.
[4] 杜文君,薛皓南.深层软岩巷道锚杆组合拱理论[J].科技与企业,2016(10):12.
[5] 王一立,范留军.传统悬吊、组合拱理论与松动圈理论联系差异探究[J].科技视界,2015(24):136-137.
[6] 曲懋轩,侯克鹏.松动圈理论应用概述[J].价值工程,2014,33(2):272-274.
[7] 董方庭,宋宏伟,郭志宏,等.巷道围岩松动圈支护理论[J].煤炭学报,1994,19(1):21-31.
[8] 石建军,马念杰,闫德忠,等.巷道围岩松动圈测试技术及应用[J].煤炭工程,2008(3):32-34.
[9] 杨旭旭,王文庆,靖洪文.围岩松动圈常用测试方法分析与比较[J].煤炭科学技术,2012,40(8):1-5,54.
[10] 赵凯.九道岭煤矿综放工作面两巷围岩稳定控制技术研究[D].阜新:辽宁工程技术大学,2014.