Title: Analysis of Roof Structure on Longwall Remaining Coal Pillars Support Mining and Its Application
Abstract:In longwall remaining coal pillars support mining,if the coal pillars are very small in size,the roof cutting accident is likely to happen in a limited exploitation area;while if the coal pillars are ...In longwall remaining coal pillars support mining,if the coal pillars are very small in size,the roof cutting accident is likely to happen in a limited exploitation area;while if the coal pillars are very large in size,roof falling crossing the mining area is likely to happen.According to building mechanics model in order to solve these two kinds of roof falling,the continuous beam model is established to calculate the stressed state of coal pillars with different properties.Then the software RFPA2D is used to numerically simulate the failure of surrounding rocks in mining area of Guojiawan coal mine.Meanwhile,the roof structure is analyzed,obtaining two different roof falling characteristics corresponding to the two problems.On the basis of this,we have proposed a scheme in which the coal pillars at some key points and in key area are monitored to solve the problem of two kinds of roof falling.Read More
Publication Year: 2007
Publication Date: 2007-01-01
Language: en
Type: article
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot