煤炭工程 ›› 2019, Vol. 51 ›› Issue (3): 37-40.doi: 10.11799/ce201903009

• 施工技术 • 上一篇    下一篇

安山煤矿软岩巷道底鼓机理及控制技术

张杰1,周府伟1,杨涛1,谢沛2,沈瑞杰2,郭建平2   

  1. 1. 西安科技大学能源学院
    2. 陕西陕煤陕北矿业有限公司
  • 收稿日期:2018-09-05 修回日期:2018-10-26 出版日期:2019-03-20 发布日期:2019-03-19
  • 通讯作者: 沈瑞杰 E-mail:srjie@163.com

Floor Heave Mechanism and Control Technique of Soft Rock Roadway in Anshan Mine

  • Received:2018-09-05 Revised:2018-10-26 Online:2019-03-20 Published:2019-03-19

摘要: 为了有效控制吸水膨胀性软岩巷道的底鼓,以安山煤矿31煤四盘区主运大巷为研究对象,以载荷作用和水理作用为综合影响因素分析了巷道的底鼓机理,提出了卸压槽防治底鼓的措施。利用FLAC3D数值模拟软件,研究了不同深度切槽下的巷道围岩应力分布与位移情况,进一步确定了卸压槽参数。研究表明采用切槽卸压减缓了巷道帮角应力集中效应,使得底板垂直应力向深部转移,卸压槽壁的挠曲变形吸收了底板的变形量。现场实践证明采用的卸压槽和卸压参数能有效控制巷道底鼓。

关键词: 软岩巷道, 底鼓机理, 吸水膨胀, 卸压槽, 应力集中

Abstract: Abstract:In order to effectively control floor heave of water-absorption-expansion soft rock roadway,the author have analysed floor heave mechanism based on double factors of loading and water conditioning. Pressure-relief was proposed to control floor heave.A mechanics model for pressure-relief was established. The method of determining the width of pressure-relief was given. The stress distribution and displacement of roadway surrounding rock at different depth of pressure-relief are studied by means of FLAC-3D software. The parameters of pressure-relief are further determined. Studies have shown that adoption of pressure-relief reduced stress concentration effect of roadway angle and transferred vertical stress of the floor to deep. It is the flexure deformation of the diaphragm wall of pressure-relief that absorb the deformation of the floor. Field application has shown that adoption of pressure-relief and pressure-relief parameters can control floor heave effectively.

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