综采工作面柔模混凝土沿空留巷力学模型分析与控制技术研究

Study on Mechanical Model Analysis and Control Technology of Flexible Mode Concrete Gob-side Entry Retaining in Fully Mechanized Mining Face

为保证3107工作面辅运巷沿空留巷期间巷道围岩的稳定,通过建立柔模混凝土沿空留巷力学模型,确定巷旁柔模混凝土单位厚度和长度均为1m,采用C20标号的混凝土作为充填体,并对辅运巷留巷期间的围岩控制方案进行具体设计,在留巷期间进行矿压观测。结果表明:留巷期间顶底板的最大移近量为172mm,两帮最大移近量为160mm,保证了沿空留巷围岩的稳定。

In order to ensure the stability of surrounding rock of auxiliary transportation roadway during gob-side entry retaining in the 3107 working face,a mechanical model of flexible mode concrete gob-side entry retaining is established.The thickness and length of flexible mode concrete beside roadway are determined to be 1m respectively.The C20 concrete is used as filling body.The scheme for surrounding rock control of auxiliary haulage roadway during the gob-side entry retaining is designed concretely,and the mine pressure is also observed.The results show that the maximum displacement of roof and floor is 172mm,and the maximum displacement of both sides is 160mm,which ensures the stability of surrounding rock along the goaf.