摘要
为了研究伊犁一矿砾石层斜井井筒的围岩稳定性,分别对伊犁一矿回风井和材料井的无水和富水段围岩进行了现场试验。试验结果表明:①无水砾石层大断面斜井井筒围岩表现较为稳定,架棚临时支护、钢筋混凝土井壁作为永久支护是有效的支护方法。在采用挖掘机掘进时,可以全断面挖掘,及时临时支护。根据围岩的稳定状况确定临时支护的长度,一般可以控制在20～30m。②含水砾石层斜井井筒围岩地压表现强烈、容易失稳。在该地层中宜采用超前支护、临时支护和永久支护相结合的支护方法。支护的重点是工作面渗水或涌水治理。研究结果为伊犁矿区建设方案的选取提供了参考。
In order to study surrounding rock stability of inclined shaft in gravel stratum of Yili＇s First Coal Mine,the field tests on surrounding rock in no water and water-rich section of air shaft and material well were done respectively.The results show that①the surrounding rock of large section inclined shaft in no water gravel stratum is steady.Shed temporary support,reinforced concrete wall as a permanent support is an effective method of supporting.When driving in the use of excavators the whole section is dug,and temporary support in a timely manner.The length of temporary support according to the stability of surrounding rock to determine usually can be controlled in 20～30m.② The surrounding rock in water-rich gravel stratum is easy to instability.The combination support method of advanced support,temporary support and the permanent support should be adopted.Support should focus on water seepage or gushing water treatment face.The results can provide reference for Lili＇s mine building programs.
出处
《中国矿业》
北大核心
2010年第8期87-91,共5页
China Mining Magazine
基金
国家科技支撑计划(2007BAK24B00)
中央高校基本科研业务费资助
关键词
砾石层
斜井
围岩稳定性
现场试验
gravel soil
oblique shaft
wall rock stability
field test
