复杂条件下大断面水泵房硐室注浆与锚固加固技术实践
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摘要
韩咀煤矿水泵房硐室是沿原窑咀老巷刷扩而成,存在围岩应力高度集中、两帮帮鼓严重及变形量较大等问题。在原砌碹支护加固方案基础上,采用"深浅孔、高低压"耦合注浆加固方法,先通过低压浅孔充填注浆,将浅部围岩中的裂隙、缝隙充填起来并形成止浆墙,再进行锚喷支护,最后进行高压深孔注浆对深部围岩细微裂隙进行注浆加固,将松动圈范围内的破碎围岩体胶结,从而将锚杆压缩拱、锚索深部承载圈等形成的内外圈承载结构有效地组合,最终形成一个高强度、高刚度的多层锚壳组合拱结构,共同维持巷道软弱破碎围岩的长期稳定与安全。此方案对类似情况的矿山具有一定的借鉴意义。
The diverting chamber of the Hanzhi Coal Mine pump house is formed by brushing along the old kiln nozzle. There are problems such as high concentration of surrounding rock stress, serious damage to the two gangs and large deformation. On the basis of the original reinforced concrete support reinforcement scheme, the "deep shallow hole, high and low pressure" coupling grouting reinforcement method is adopted, which first fills the grout through the low pressure shallow hole, fills the cracks and gaps in the shallow surrounding rock and forms the retaining wall. Then, anchoring and shot concreting support is carried out. Finally, high-pressure deep-hole grouting is used to grout the small cracks in the deep surrounding rock, and the broken surrounding rock mass in the loose ring is cemented, so that the inner and outer ring bearing structures formed by the anchor arch and the anchor cable deep bearing ring are effectively combined to form a high-strength, high-stiffness multi-layer anchor-shell composite arch structure to jointly maintain the long-term stability and safety of the soft and broken surrounding rock of the roadway. This program has certain reference significance for mines with similar conditions.
The diverting chamber of the Hanzhi Coal Mine pump house is formed by brushing along the old kiln nozzle. There are problems such as high concentration of surrounding rock stress, serious damage to the two gangs and large deformation. On the basis of the original reinforced concrete support reinforcement scheme, the "deep shallow hole, high and low pressure" coupling grouting reinforcement method is adopted, which first fills the grout through the low pressure shallow hole, fills the cracks and gaps in the shallow surrounding rock and forms the retaining wall. Then, anchoring and shot concreting support is carried out. Finally, high-pressure deep-hole grouting is used to grout the small cracks in the deep surrounding rock, and the broken surrounding rock mass in the loose ring is cemented, so that the inner and outer ring bearing structures formed by the anchor arch and the anchor cable deep bearing ring are effectively combined to form a high-strength, high-stiffness multi-layer anchor-shell composite arch structure to jointly maintain the long-term stability and safety of the soft and broken surrounding rock of the roadway. This program has certain reference significance for mines with similar conditions.
引文
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[3]王全明.赵庄矿工作面复合顶板深孔预注浆加固技术[J].煤矿安全,2018,49(11):80-83.
[4]王春辉.煤巷过陷落柱注浆加固技术研究[J].煤炭与化工,2018,41(09):23-25,31.
[5]陆新龙.深水平变电所及泵房顶底板加固实践分析[J].中小企业管理与科技,2018(02):195-196.
[6]李世栋.深部破碎围岩注浆加固技术及其应用[J].矿山测量,2017,45(02):56-60.
[7]李世杰,张明杰,张大千.鹤煤公司深部水泵房优化设计与支护技术[J].煤矿开采,2015,20(03):69-72.
[8]刘德华,朱海峰.煤矿采区水泵房与水仓优化设计[J].内蒙古煤炭经济,2017(18):120,125.
[9]沈飞,杨智.梅州新城水厂泵房基坑支护方案设计[J].嘉应学院学报,2017,35(05):27-32.
[10]魏红磊.吉宁矿采区水泵房与水仓优化设计[J].煤炭工程,2016,48(05):11-13.
[11]范广建.千米深井中央水泵房围岩控制技术[J].煤炭工程,2012(07):34-35+38.
[12]何宇雄.余吾煤业公司中央水泵房厚层破碎软岩加固技术[J].煤,2008(09):46-48.
[13]王金喜,李金奎,崔世海,王雨,郝彬彬,朱阳照,郭亚楠.高流变围岩泵房注浆加固的试验研究[J].河北建筑科技学院学报,2006(01):73-75.