煤矿顶板含水层溃水溃沙灾害井下挡水墙建造技术
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摘要
以宁东鸳鸯湖矿区麦垛山煤矿2煤回风大巷溃水溃沙灾害为例,利用平衡理论简化计算方法,以巷道尺寸及围岩性质为约束条件,建立挡水墙承抗压、抗剪强度计算的物理和数学模型,定量计算了墙体、围岩可承受的安全水头高度,构建混凝土砌块平板式挡水墙,核算出当围岩槽深为0. 5 m、两侧砌块厚度分别为0. 5 m、混凝土浇筑厚度为1. 0 m时,可满足强度要求,并提出了该形式挡水墙体的建造工艺,为恢复生产提供保护屏障,实现了对麦垛山煤矿2煤大巷溃水溃沙灾害的安全治理。
Taking the water and sand burst disaster of No.2 coal return air roadway in Maiduoshan Coal Mine of Yuanyanghu Mining Area in Ningdong as an example,using the simplified calculation method of equilibrium theory and taking the size of roadway and the nature of surrounding rock as the constrains,the physical and mathematical models for calculating the compressive and shear strength of the water-retaining wall were established. The safe head height of the wall and the surrounding rock was calculated quantitatively,and the concrete block water-retaining wall in flat type was constructed. It is calculated that when the depth of the surrounding rock groove is 0. 5 m,the thickness of the blocks on both sides is 0. 5 m,and the concrete pouring thickness is 1. 0 m,the strength requirements can be met. The construction technology of this type of water-retaining wall is put forward to provide a protective barrier for the recovery of production,and realize the safety management of the water and sand burst disaster of the No.2 coal roadway in Maiduoshan Coal Mine.
Taking the water and sand burst disaster of No.2 coal return air roadway in Maiduoshan Coal Mine of Yuanyanghu Mining Area in Ningdong as an example,using the simplified calculation method of equilibrium theory and taking the size of roadway and the nature of surrounding rock as the constrains,the physical and mathematical models for calculating the compressive and shear strength of the water-retaining wall were established. The safe head height of the wall and the surrounding rock was calculated quantitatively,and the concrete block water-retaining wall in flat type was constructed. It is calculated that when the depth of the surrounding rock groove is 0. 5 m,the thickness of the blocks on both sides is 0. 5 m,and the concrete pouring thickness is 1. 0 m,the strength requirements can be met. The construction technology of this type of water-retaining wall is put forward to provide a protective barrier for the recovery of production,and realize the safety management of the water and sand burst disaster of the No.2 coal roadway in Maiduoshan Coal Mine.
引文
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[2]侯忠杰.浅埋煤层关键层研究[J].煤炭学报,1999,24(4):359-363.
[3]申宝宏,孔庆军,许延春,等.厚含水松散层下留设防砂煤岩柱综放开采方法适应性研究[J].煤炭科学技术,2000,28(10):35-38.
[4]李德彬.宁东煤田某煤矿近风氧化带安全开采防治水技术研究[J].煤炭技术,2017,36(7):169-170.
[5]田洪铭,陈卫忠,田田,等.软岩蠕变损伤特性的试验与理论研究[J].岩石力学与工程学报,2012,31(3):611-617.
[6]杨建,赵彩凤.基于工作面顶板疏放水的含水层水力联系研究[J].矿业安全与环保,2015,42(5):84-86.
[7]梁燕,谭周地,李广杰.弱胶结砂层突水、涌砂模拟试验研究[J].金属矿山,2002(10):48-50.
[8]李建文.薄基岩浅埋煤层开采突水溃砂致灾机理及防治技术研究[D].西安:西安科技大学,2013.
[9]隋旺华,董青红,蔡光桃,等.采掘溃砂机理与预防[M].北京:地质出版社,2009.
[10]张玉军,康永华,刘秀娥.松软砂岩含水层下煤矿开采溃砂预测[J].煤炭学报,2006,31(4):429-432.
[11]国家安全生产监督管理总局,国家煤矿安全监察局.煤矿防治水细则[S].北京:煤炭工业出版社,2018.
[12]严国昌.合理计算防水密闭墙[J].煤炭学报,1965,2(3):83-86.
[13]陈阵.对“合理计算防水密闭墙”一文的我见[J].煤炭学报,1966,3(1):62-70.
[14]梁华强,周国庆,刘志强,等.采空区巷道防水闸门安全性的数值分析[J].矿业安全与环保,2005,32(3):17-18.
[15]国振喜.钢筋混凝土结构计算手册[M].北京:机械工业出版社,2002.
[16]卢海超,何涛,张兆威.综放工作面联络巷密闭墙合理参数确定[J].煤炭技术,2014(10):118-119.
[17]吕恒林,王来,闫安志,等.结构力学[M].徐州:中国矿业大学出版社,2010.