动压软岩巷道围岩变形特征及综合治理实践
投稿时间:2013-09-25  修订日期:2014-02-21  点此下载全文
引用本文:
摘要点击次数: 583
全文下载次数: 323
作者单位E-mail
昝赵琼 安徽理工大学 能源与安全学院 736394035@qq.com 
中文摘要:随着煤炭资源的不断开发,软岩巷道的支护问题也严重影响了煤矿企业的安全生产。针对某矿一采区轨道上山软岩、动压的复合型工程特点,从测试段巷道围岩岩性及物理力学性能、巷道围岩位移发展的时间效应特征、采动影响后巷道围岩松动圈特征入手,分析了测试段巷道围岩失稳破坏的原因。研究认为:改善巷道围岩的力学性能,提高围岩的自承载能力,同时提高支护体系强度,使得围岩和支护相互协调,起到共同承载的效果,是治理动压软岩巷道围岩稳定的有效途径之一。提出了锚网喷 锚索 底板锚杆 全断面注浆联合支护技术,通过对支护参数的优化,进行了现场的工业性试验,试验结果表明,测试段巷道受采动影响后,巷道围岩变形较小且趋于稳定的时间短,围岩破碎范围较小,巷道返修率低。
中文关键词:软岩巷道  动压  巷道支护  围岩失稳控制
 
Deformation Characteristics of Surrounding Rocks in Dynamically-Pressured Soft Rock Roadway and Comprehensive Management Practice
Abstract:With the continuous development of coal resources, the supporting problems of soft rock roadway has seriously affected the safe production of the coal mine enterprises. Aiming at the complex engineering characteristics of soft rock and dynamic pressure of rail rise, from the physical and mechanical properties of surrounding rock of the test section roadway, the time effect characteristic of displacement development of surrounding rock and the characteristics of loose circle after mining, the reasons of the instability failure of the roadway were analyzed. The studies show that changing the mechanical property and the bearing capacity of surrounding rock, improving the strength of support system and making the surrounding rock and support common loading is a effective way to control dynamically-pressured soft rock roadway. This paper proposes shotcrete-bolt-floor anchor-full face grouting combined support technology, and has the industrial test with the optimized support parameters. The test results show that, the deformation and the stabilization time of soft rock roadway is short, the rock crushing range is small and the repair rate is low after mining.
keywords:soft roadway  dynamic pressure  roadway support  surrounding rock deformation control
查看全文  查看/发表评论  下载PDF阅读器
设备展厅
您是第5304700位访问者  备案许可证编号:京ICP备13036454号
版权所有:《中国矿业》杂志社有限公司
地  址: 北京市朝阳区安定门外小关东里10号院东小楼 邮编:100029 电话:010-68332570 88374940 E-mail: zgkyzzs@163.com