摘要
针对近距离煤层采空区条件下存在难掘进、顶板易出现破碎、两帮易出现垮落的现象,采用层次分析法及巷道围岩变形现场试验,对韩城矿区下峪口煤矿近距离煤层巷道掘进影响因素分析及支护技术进行研究。结果表明,巷道快速掘进因素重要度排序依次为巷道掘进工艺B2>围岩地质因素B1>劳动组织形式B3>巷道掘进设备B4>机械故障B5,且巷道掘进工艺及围岩地质因素是主要影响因素。在此基础上,提出锚网索+U型棚的支护方式,通过现场试验对23306下进风顺槽进行了表面位移观测,发现该段巷道表面位移基本能保持平稳且变形量显著降低,巷道顶底板变形量不超过450 mm,两帮变形量不超过350 mm。采用该支护方式可使巷道围岩变形稳定,为类似条件矿井安全高效生产提供经验和参考。
In view of the phenomenon that it is difficult to excavate,the roof is easy to be broken,and the two sides are easy to collapse under the goaf of the coal seam.The analytic hierarchy process and field test of roadway surrounding rock deformation were used to study the influential factors and supporting technology of roadway excavation in the near coal seam of Xiayukou Coal Mine in Hancheng Mining Area.It is concluded that the importance of roadway rapid excavation factors is in the order of roadway excavation technology B2>surrounding rock geological factors B1>labor organization mode B3>roadway excavation equipment B4>mechanical failure B5,among which roadway excavation technology and surrounding rock geological factors are the main influential factors.The support mode of anchor net cable+U-shaped shed was proposed,and the surface displacement of the 23306 lower air inlet way was observed through field test,and the results shows that the surface displacement of the roadway in this section could be basically stable and the deformation was significantly reduced,and the deformation of the roof and floor of the roadway did not exceed 450 mm,and the deformation of the two sides did not exceed 350 mm.This support mode can realize the deformation stability of the surrounding rock of the roadway,and provide reference for the safe and efficient production of mines under similar conditions.
作者
康萌
冯磊
张宏涛
KANG Meng;FENG Lei;ZHANG Hongtao(Shaanxi Shanmei Hancheng Mining Co.,Ltd.,Weinan 715400,China;School of Energy Engineering,Xi’an University of Science and Technology,Xi’an 710054,China)
出处
《陕西煤炭》
2024年第10期96-104,共9页
Shaanxi Coal
关键词
近距离煤层
掘进巷道
层次分析法
围岩地质
联合支护
near-distance coal seams
excavation roadway
hierarchy analytic process
surrounding rock geology
joint support
