摘要
在榆树井煤矿风井井底车场布置2个测点,采用应力解除法进行现场地应力实测。实测数据表明:水平应力大于垂直应力,最大水平主应力为垂直应力的1.70～1.76倍,即井底车场的地应力以水平构造应力为主,水平构造应力对巷道稳定性影响较大;实测的最大水平主应力为最小水平主应力的1.90～1.93倍,即水平应力对巷道稳定性的影响具有明显的方向性。并根据矿区实测地应力资料,分析了矿井地应力大小、方向和分布特征。实践表明,钻孔套芯应力解除地应力测量法是测量矿井地应力的最快捷、有效的技术手段,为巷道布置及支护设计等提供了可靠依据。
In Yushujing Mine,two measuring points were established in the air shaft station,and the geostress was measured by stress relief method.The measured data indicated that horizontal stress was larger than vertical stress;the maximum horizontal principal stress was 1.70～1.76 times larger than vertical stress.So the geostress in the air shaft station was mainly horizontal tectonic stress,and the horizontal tectonic stress had a greater effect on the tunnel stability.The measured maximum horizontal principal stress was 1.90～1.93 times larger than the minimum horizontal principal stress,so the horizontal stress had a directional impact on the tunnel stability.According to the measured geostress data,the size,direction and distribution characteristics were analyzed.It proved that the overcoring method in borehole was the most prompt and effective technological means,it provided a reliable basis for the tunnel arrangement and support design.
出处
《西安科技大学学报》
CAS
北大核心
2011年第5期510-514,共5页
Journal of Xi’an University of Science and Technology
基金
教育部新世纪优秀人才支持计划资助(NCET-07-0519)
教育部长江学者和创新团队发展计划资助(IRT0843)
关键词
地应力测量
应力解除
分布规律
地应力场
geostress measurement
stress relief
distribution law
geostress field
