摘要
通过数值计算得出巷道周边的垂直应力分布,并根据垂直应力分布来判断巷道周边松动区的范围,近似认为垂直应力小于原岩应力的区域为松动区,从而得到了不同煤柱宽度时综放沿空留巷的松动圈厚度,并根据计算的松动圈厚度进行了锚杆参数设计。通过现场验证,取得了较好的支护效果。
With the calculation of the numerical value, the paper had got the vertical stress distribution around the gateway. With the vertical stress distribution, the paper judged the area of the releasing zone around the gateway. The approximation hold that the vertical stress was smaller than the releasing zone of the in-situ rock stress area. From the different coal pillar width, a thickness of the releasing ring for the gateway of fully mechanized top coal caving miing face retained for next level can be obtained. Base on the thickness calculation of the releasing zone, a bolt parameter design was made. After the site investigation, a good support result was obtained.
出处
《煤炭科学技术》
CAS
北大核心
2005年第5期42-45,共4页
Coal Science and Technology
关键词
松动圈
综放
异形煤柱
沿空留巷
released ring
fully mechanized top coal caving
irregular coal pillars
gateway retained for next sublevel
