中兴矿沿空留巷无煤柱开采条件下底鼓规律研究

发布时间：2018-05-08 13:48

本文选题：沿空留巷 + 变形监测　；参考：《煤炭工程》2017年03期

【摘要】：针对中兴矿多条沿空留巷开展了变形监测工作,结合一次回采、二次回采过程中巷道与工作面距离的空间关系,通过分析两次回采过程中巷道底鼓变形量的变化,研究了中兴矿沿空留巷无煤柱开采条件下的底鼓规律。研究表明:沿空留巷的底鼓变形主要由以下阶段产生:开挖及开挖稳定阶段、一次采动超前阶段、一次采动后阶段、二次采动超前阶段,其中一次采动后阶段与二次采动超前阶段是巷道底鼓产生的主要时期,产生的底鼓量占巷道使用过程中底鼓量的90%以上;沿空留巷在二次采动期间产生的底鼓变形远大于一次采动时期。建议在设计沿空留巷支护结构时,不仅要考虑一次采动的影响,更应充分考虑二次采动对沿空留巷围岩的影响。
[Abstract]:In view of the deformation monitoring work of several roadways along the goaf in Zhongxing Mine, combined with the spatial relationship between the roadway and the working face in the process of primary mining and secondary mining, the variation of the deformation of roadway floor heave in the course of twice mining is analyzed. In this paper, the law of bottom drum is studied under the condition of no coal pillar mining in the roadway left along the gob in Zhongxing Mine. The research shows that the deformation of bottom drum along goaf is mainly produced by the following stages: excavation and excavation stabilization stage, first mining advance stage, once mining post-stage, second mining advance stage, The first mining stage and the second mining advance stage are the main periods of the roadway floor bulging, which accounts for 90% of the roadway floor heave in the process of using. The deformation of bottom drum in the second mining period is much larger than that in the first mining period. It is suggested that not only the influence of primary mining but also the influence of secondary mining on surrounding rock along goaf should be fully considered in the design of retaining roadway supporting structure along gob.
【作者单位】：中国矿业大学(北京)力学与建筑工程学院;
【基金】：教育部高等学校博士学科点专项科研基金项目(20120023110009)
【分类号】：TD322;TD353

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