深井软岩巷道双套棚灌浆支护技术研究与应用
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摘要
为解决深井软岩巷道变形大、支护难的问题,以盘江矿区某矿121213工作面运输上山为工程背景,进行深井软岩巷道变形破坏特征及变形破坏原因的研究,得出结论:高地应力、围岩遇水易膨胀变形及围岩承载能力难以发挥是造成巷道变形失稳的主要原因。针对性地提出了双套棚灌浆支护技术,设计一种"锚杆锚索+灌浆+双U型套棚"的复合支护方案,即在锚杆、锚索支护的基础上,在围岩外部两架U型棚之间进行高压注浆,强化围岩承载结构。现场监测结果表明:采用双套棚灌浆支护后,巷道顶板、两帮及底板平均变形速率分别为0.55,0.43mm/d和0.36mm/d,最大变形量分别为145,115,87mm,巷道变形量在可控范围内,有效地控制了深部软岩巷道收敛变形。
In order to solve the problems such as large deformation and support difficulties in soft rock roadway of deep mine,the characteristics and causes of deformation and failure of soft rock roadway in deep mine were studied under the engineering background of transportation of 121213 working face in Panjiang mining area.It was concluded that the main causes of roadway deformation and instability were high in-situ stress,swelling and deformation of surrounding rock in case of water,and difficulty in exerting the bearing capacity of surrounding rock.The double-shed grouting support technology was put forward accordingly,and a composite support scheme combining bolt anchor cable,grouting and double U-shaped shed was designed.Namely,on the basis of bolt and anchor cable support,high pressure grouting was carried out between two U-shaped sheds outside the surrounding rock,so as to strengthen the bearing structure of surrounding rock.The field monitoring results showed that by using this new support technology,the average deformation rates of roof,two sides and floor were 0.55,0.43 mm/d and0.36 mm/d respectively,and the maximum deformation values were 145,115 and 87 mm respectively.The deformation of roadway was within the controllable range,and the convergence deformation of deep soft rock roadway was effectively controlled.
In order to solve the problems such as large deformation and support difficulties in soft rock roadway of deep mine,the characteristics and causes of deformation and failure of soft rock roadway in deep mine were studied under the engineering background of transportation of 121213 working face in Panjiang mining area.It was concluded that the main causes of roadway deformation and instability were high in-situ stress,swelling and deformation of surrounding rock in case of water,and difficulty in exerting the bearing capacity of surrounding rock.The double-shed grouting support technology was put forward accordingly,and a composite support scheme combining bolt anchor cable,grouting and double U-shaped shed was designed.Namely,on the basis of bolt and anchor cable support,high pressure grouting was carried out between two U-shaped sheds outside the surrounding rock,so as to strengthen the bearing structure of surrounding rock.The field monitoring results showed that by using this new support technology,the average deformation rates of roof,two sides and floor were 0.55,0.43 mm/d and0.36 mm/d respectively,and the maximum deformation values were 145,115 and 87 mm respectively.The deformation of roadway was within the controllable range,and the convergence deformation of deep soft rock roadway was effectively controlled.
引文
[1]何满潮,谢和平,彭苏萍,等.深部开采岩体力学研究[J].岩石力学与工程学报,2005(16):2803-2813.
[2]周宏伟,谢和平,左建平.深部高地应力下岩石力学行为研究进展[J].力学进展,2005(1):91-99.
[3]牛双建,靖洪文,张忠宇,等.深部软岩巷道围岩稳定控制技术研究及应用[J].煤炭学报,2011,36(6):914-919.
[4]康红普,王金华,林健.煤矿巷道锚杆支护应用实例分析[J].岩石力学与工程学报,2010,29(4):649-664.
[5]康红普.我国煤矿巷道锚杆支护技术发展60年及展望[J].中国矿业大学学报,2016,45(6):1071-1081.
[6]康红普,范明建,高富强,等.超千米深井巷道围岩变形特征与支护技术[J].岩石力学与工程学报,2015,34(11):2227-2241.
[7]康红普,吴拥政,何杰,等.深部冲击地压巷道锚杆支护作用研究与实践[J].煤炭学报,2015,40(10):2225-2233.
[8]康红普,林健,吴拥政,等.锚杆构件力学性能及匹配性[J].煤炭学报,2015,40(1):11-23.
[9]康红普,崔千里,胡滨,等.树脂锚杆锚固性能及影响因素分析[J].煤炭学报,2014,39(1):1-10.
[10]任重远.深部高应力软岩巷道“三锚”耦合支护技术[J].煤炭科学技术,2013,41(10):30-33+37.
[11]孟庆彬,韩立军,张帆舸,等.深部高应力软岩巷道耦合支护效应研究及应用[J].岩土力学,2017,38(5):1424-1435+1444.
[12]孟庆彬,韩立军,张建,等.深部高应力破碎软岩巷道支护技术研究及其应用[J].中南大学学报(自然科学版),2016,47(11):3861-3872.
[13]孟庆彬,韩立军,乔卫国,等.深部高应力软岩巷道围岩流变数值模拟研究[J].采矿与安全工程学报,2012,29(6):762-769.
[14]杨仁树,李永亮,郭东明,等.深部高应力软岩巷道变形破坏原因及支护技术[J].采矿与安全工程学报,2017,34(6):1035-1041.
[15]王连国,李明远,王学知.深部高应力极软岩巷道锚注支护技术研究[J].岩石力学与工程学报,2005(16):2889-2893.
[16]杨仁树,马鑫民,李清,等.煤矿巷道支护方案专家系统及应用研究[J].采矿与安全工程学报,2013,30(5):648-652.
[17]杨仁树,薛华俊,郭东明,等.基于注浆试验的深井软岩CT分析[J].煤炭学报,2016,41(2):345-351.
[18]辛亚军,穆利斌.高应力泥岩顶板巷道围岩失稳特征及控制分析[J].采矿与安全工程学报,2017,34(3):519-526.
[19]陈菲,何川,邓建辉.高地应力定义及其定性定量判据[J].岩土力学,2015,36(4):971-980.
[20]冯月新,孟波.高应力巷道锚穿钢管混凝土支护技术研究[J].煤炭科学技术,2015,43(4):1-5.
[2]周宏伟,谢和平,左建平.深部高地应力下岩石力学行为研究进展[J].力学进展,2005(1):91-99.
[3]牛双建,靖洪文,张忠宇,等.深部软岩巷道围岩稳定控制技术研究及应用[J].煤炭学报,2011,36(6):914-919.
[4]康红普,王金华,林健.煤矿巷道锚杆支护应用实例分析[J].岩石力学与工程学报,2010,29(4):649-664.
[5]康红普.我国煤矿巷道锚杆支护技术发展60年及展望[J].中国矿业大学学报,2016,45(6):1071-1081.
[6]康红普,范明建,高富强,等.超千米深井巷道围岩变形特征与支护技术[J].岩石力学与工程学报,2015,34(11):2227-2241.
[7]康红普,吴拥政,何杰,等.深部冲击地压巷道锚杆支护作用研究与实践[J].煤炭学报,2015,40(10):2225-2233.
[8]康红普,林健,吴拥政,等.锚杆构件力学性能及匹配性[J].煤炭学报,2015,40(1):11-23.
[9]康红普,崔千里,胡滨,等.树脂锚杆锚固性能及影响因素分析[J].煤炭学报,2014,39(1):1-10.
[10]任重远.深部高应力软岩巷道“三锚”耦合支护技术[J].煤炭科学技术,2013,41(10):30-33+37.
[11]孟庆彬,韩立军,张帆舸,等.深部高应力软岩巷道耦合支护效应研究及应用[J].岩土力学,2017,38(5):1424-1435+1444.
[12]孟庆彬,韩立军,张建,等.深部高应力破碎软岩巷道支护技术研究及其应用[J].中南大学学报(自然科学版),2016,47(11):3861-3872.
[13]孟庆彬,韩立军,乔卫国,等.深部高应力软岩巷道围岩流变数值模拟研究[J].采矿与安全工程学报,2012,29(6):762-769.
[14]杨仁树,李永亮,郭东明,等.深部高应力软岩巷道变形破坏原因及支护技术[J].采矿与安全工程学报,2017,34(6):1035-1041.
[15]王连国,李明远,王学知.深部高应力极软岩巷道锚注支护技术研究[J].岩石力学与工程学报,2005(16):2889-2893.
[16]杨仁树,马鑫民,李清,等.煤矿巷道支护方案专家系统及应用研究[J].采矿与安全工程学报,2013,30(5):648-652.
[17]杨仁树,薛华俊,郭东明,等.基于注浆试验的深井软岩CT分析[J].煤炭学报,2016,41(2):345-351.
[18]辛亚军,穆利斌.高应力泥岩顶板巷道围岩失稳特征及控制分析[J].采矿与安全工程学报,2017,34(3):519-526.
[19]陈菲,何川,邓建辉.高地应力定义及其定性定量判据[J].岩土力学,2015,36(4):971-980.
[20]冯月新,孟波.高应力巷道锚穿钢管混凝土支护技术研究[J].煤炭科学技术,2015,43(4):1-5.