高强全锚注支护结构性能与工艺技术应用
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摘要
针对高应力、软岩、动压、裂隙节理破碎岩体及其复合型困难条件巷道围岩非连续、非协调大变形控制难题,采用理论分析、室内支护材料力学实验、现场试验的综合研究方法,进行了高强中空注浆锚杆、高强中空注浆锚索结构分析、性能测试及工艺技术应用探索,提出了复杂困难条件巷道高强全锚注一体化控制理念,即通过采用高强中空注浆锚索/锚杆及高强护表构件全锚注支护,最终形成巷道围岩"协同强力护表、叠加内拱、深外拱"多层次、梯次强化支承结构;在平煤一矿回风上山进行了全方位高强耦合控制试验,长期矿压观测表明巷道围岩得到有效控制,真正实现了锚杆索锚注一体化、全长锚固及围岩提质增强。
Aiming at the problems of discontinuous and inconsistent large deformation control of roadway surrounding rock under high stress, soft rock, dynamic pressure, cracked joints and complex difficult conditions, the high strength hollow grouting anchor bolt and high strength hollow grouting anchor cable were carried out by using the comprehensive research methods of theoretical analysis, indoor support material mechanics test and field test. Through structure analysis, performance experiment and technological application exploration, we proposed the idea of integrated control of high-strength bolting and grouting in roadways under complex and difficult conditions, i.e. through the use of high-strength hollow grouting anchor cable/bolt and high-strength surface protection components with full bolting and grouting support, the surrounding rock of roadways has finally formed a multilevel of "synergistic strong surface protection, superimposed internal arch, deep external arch ". The supporting structure is strengthened step by step, and the omni-directional high strength coupling control test is carried out in the return air of No. 1 Coal Mine of Pingdingshan Coal Mine.
Aiming at the problems of discontinuous and inconsistent large deformation control of roadway surrounding rock under high stress, soft rock, dynamic pressure, cracked joints and complex difficult conditions, the high strength hollow grouting anchor bolt and high strength hollow grouting anchor cable were carried out by using the comprehensive research methods of theoretical analysis, indoor support material mechanics test and field test. Through structure analysis, performance experiment and technological application exploration, we proposed the idea of integrated control of high-strength bolting and grouting in roadways under complex and difficult conditions, i.e. through the use of high-strength hollow grouting anchor cable/bolt and high-strength surface protection components with full bolting and grouting support, the surrounding rock of roadways has finally formed a multilevel of "synergistic strong surface protection, superimposed internal arch, deep external arch ". The supporting structure is strengthened step by step, and the omni-directional high strength coupling control test is carried out in the return air of No. 1 Coal Mine of Pingdingshan Coal Mine.
引文
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[3]王志强,石磊,孙中文,等.厚煤层巷道煤柱留设及沿空巷道围岩控制机理研究[J].煤矿安全,2018,49(8):48-52.
[4]郭靖,宋要斌,赵利鼎,等.极近垂距骑跨采工作面边界位置优化及底板巷道围岩稳定性研究[J].煤矿安全,2018,49(7):28-33.
[5]唐永志,陶杰,蒋敬平,等.中空高强锚注锚索在淮南矿区的应用[J].安徽理工大学学报(自然科学版),2012,32(增):280-284.
[6]张辉.超千米深井高应力巷道底鼓机理及锚固技术研究[D].北京:中国矿业大学,2013.
[7]肖长春,孔翔,林光志.潘一东深井软岩巷道高强锚注技术应用研究[J].安徽理工大学学报(自然科学版),2012,32(增):322-325.
[8]黄耀光,王连国,陆银龙.巷道围岩全断面锚注浆液渗透扩散规律研究[J].采矿与安全工程学报,2015,32(2):240-244.
[9]常聚才,谢广祥.深部岩巷底鼓机理及底板超挖锚注回填技术[J].采矿与安全工程学报,2011,28(3):361-364.
[10]丁航,高振军.补连塔煤矿掘锚机巷道掘进方案优化[J].煤矿安全,2018,49(S1):110-112.
[11]李全根,陈全建.高应力软岩超大断面巷道锚杆+锚索+锚注动态耦合支护技术[J].煤矿支护,2015(3):10-15.
[12]史元伟,张声涛,尹世魁,等.国内外煤矿深部开采岩层控制技术[M].北京:煤炭工业出版社,2009.
[13]孟庆彬,韩立军,乔卫国,等.深部高应力软岩巷道断面形状优化设计数值模拟研究[J].采矿与安全工程学报,2012,29(5):650-656.
[14]何杰,方新秋,许伟,等.深井高应力破碎区巷道破坏机理及控制研究[J].采矿与安全工程学报,2008,25(4):494-498.
[15]郭良,黄成麟,张春雷.高水平应力下大断面巷道围岩破坏机理及支护方案[J].煤矿安全,2018,49(9):266-270.