采矿与安全工程学报 ›› 2012, Vol. 29 ›› Issue (6): 757-761.

• 论文 • 上一篇    下一篇

采场坚硬顶板沿空巷旁柔性充填留巷试验研究

  

  1. 1. 安徽理工大学煤矿安全高效开采省部共建教育部重点实验室,安徽  淮南  232001;
    2. 北京科技大学土木与环境工程学院,北京  100083; 3. 中国矿业大学矿业工程学院,江苏  徐州  221116
  • 收稿日期:2012-05-03 出版日期:2012-11-15 发布日期:2012-11-05
  • 作者简介:成云海(1970-),男,山东省新泰市人,副教授,博士,从事矿山压力与岩层运动控制方面的研究。 E-mail:chengyunhai2005@126.com Tel:13721129479
  • 基金资助:

    国家自然科学基金项目(51174002,51174016);

    国家重点基础研究发展计划(973)项目(2010CB226800)

Experimental Study on Gob Side Entry Retaining by Roadside Flexible Packing Under Hard Roof

  • Received:2012-05-03 Online:2012-11-15 Published:2012-11-05

摘要: 为了实现坚硬直接顶板条件下沿空巷旁柔性充填体(充填矸石)承载留巷,试验得到了袋装矸石体的单轴压缩特征,结合建立的留巷巷旁侧向覆岩结构模型,定量计算了覆岩运动对巷旁充填体的静载荷;采用动力学的方法研究了顶板结构模型的动力效应,定量计算了动载荷。由此设计充填宽度为2 m时,充填体静载荷为816 kN/m,灰岩在煤壁附近断裂时的动载荷为257.3 kN/m,柔性充填体能够满足覆岩静、动载荷支护要求。

关键词: 沿空留巷, 坚硬顶板, 柔性充填, 动载荷, 试验

Abstract: In order to achieve gob-side entry retaining with flexible filling body (filling gangue) under condition of hard and direct roof, uniaxial compression characteristics of sacked gangue body are gained by experiment, combined with the establishment of lateral overlying strata’s constructional model alongside gob side entry retaining, static load caused by overlying strata movement is quantitatively calculated. Dynamic effect of constructional model of roof is studied by means of dynamics, and dynamic load is quantitatively calculated. Thus, when filling width is designed as 2 meters, static load of filling body is 816 kN/m, and dynamic load is 257.3 kN/m with limestone’s fracture near the coal wall. Supporting demand of static load and dynamic load are satisfied by flexible filling body.

Key words: gob side entry retaining, hard roof, flexible filling, dynamic load, experiment