采矿与安全工程学报 ›› 2014, Vol. 31 ›› Issue (2): 249-254.

• 论文 • 上一篇    下一篇

采动覆岩“三带”高度相似模拟及实证研究

  

  1. 1.华北科技学院科技管理处,河北 三河 065201;2.中国矿业大学(北京)资源与安全工程学院,北京 100083; 3.中国矿业大学(北京)力学与建筑工程学院,北京 100083;4.山西焦煤集团杜儿坪矿,山西 太原 030026
  • 出版日期:2014-03-15 发布日期:2014-03-20
  • 作者简介:张军(1974-),男,内蒙古自治区化德县人,博士,副教授,从事采矿工程、岩土工程方面的研究。 E-mail:996946730@qq.com Tel:13381035808
  • 基金资助:

    河北省自然科学基金项目(E2012508002);国家自然科学基金项目(51044009);中央高校基本科研业务费项目(3142013100)

Similar simulation and practical research on the mining overburden roof strata “three-zones” height

  • Online:2014-03-15 Published:2014-03-20

摘要: 基于采动覆岩破坏、断裂机理及其裂隙分布、发育特性,采用相似材料模拟实验方法,对杜儿坪矿68303工作面采动覆岩“三带”进行了研究;通过分析采空区顶板断裂、离层、下沉、裂隙分布及延伸特性,得出冒落带高度12.5 m,裂隙带高度37.5 m,弯曲下沉带高度大于80 m;采用仰斜钻孔分段注水及钻孔参数分析法现场实测了冒落带、裂隙带高度,与相似模拟实验结果进行了对比,分别相差0.8,2.5 m。表明基于采动覆岩裂隙分布特性的相似模拟实验研究结果合理、可靠,可以作为工作面顶板“三带”高度研究的有效手段。

关键词: &ldquo, 三带&rdquo, 高度;相似模拟;裂隙分布;现场实测

Abstract: The “three zones” height of mining overburden roof strata of fully mechanized working face 68303 in Du’erping coal mine have been studied by similar simulation experimental method based on the overburden rock mass failure properties and the characteristics of fractures distribution and development. The heights of caved zone, fractured zone and continuous deformation zone are 12.5 m, 37.5 m and larger than 80 m respectively by research of gob roof strata fracture, separation and convergence, distribution and extension of fractures. The experimental results are compared to the in-situ measurements of upward inclined holes water injection and the flow parameters. The heights of caved and fractured zone differ by 0.8 m and 2.5 m respectively from the in-situ measurements. The results show that the similar simulation experimental study based on the characteristics of fractures distribution are reasonable and reliable, which can be used as effective means for the research on overburden roof strata “three zones” height of working face.

Key words: "three zones", height;similar simulation;fracture distribution;in-situ measurement