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回采工作面多巷布置复用巷道全锚索支护技术研究

Research on the whole anchor cable support technology of multi-roadway layout of roadway reuse in coal face

  • 摘要: 为了解决回采工作面多巷布置复用巷道服务期内因受采动压力影响围岩变形严重的问题,以王坡煤业复用巷道为工程背景,采用现场实测和数值模拟的方法,研究了复用巷道围岩变形与破坏的特征及影响因素,分析了复用巷道围岩变形控制原理。在此基础上,提出了长、短锚索分层联合支护技术,并在3306工作面运输巷进行工业性试验。结果表明:采用长、短锚索分层联合支护技术可有效控制复用巷道围岩变形,采动影响期间巷道两帮最大移近量为140 mm,顶板最大下沉量为130 mm,与锚杆、锚索支护方式相比围岩变形量整体降低60%以上;锚索受力位于合理范围,且能趋于稳定,支护效果较好。

     

    Abstract: In order to solve the serious problem of surrounding rock deformation caused by mining pressure during the service period of multi-roadway layout of roadway reuse in coal face, based on the engineering background of roadway reuse in Wangpo Coal Industry, the characteristics and influencing factors of surrounding rock deformation and failure of roadway reuse were analyzed through field measurement and numerical simulation, and the control principle of surrounding rock deformation of roadway reuse was expounded. On this basis, the layered combined support technology of long and short cable was proposed, and the industrial test was carried out in 3306 haulage gateway. The results show that the layered combined support technology of long and short anchor cable can effectively control the surrounding rock deformation of the roadway reuse. Under the mining-induced influence, the maximum movement of the two sides of the roadway is 140 mm, and the maximum subsidence of the roof is 130 mm. Compared with the rock bolt and anchor cable support, the overall deformation of the surrounding rock is reduced by more than 60%. The anchor cablestress is in a reasonable range and tends to be stable, and the supporting effect is good.

     

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