上山掘进时卸压区应力及防突长度分析  

Analysis on Distressed Zone's Stress and Length of Preventing Outburst in Raising Tunnelling

作　　者：齐黎明[1] 林柏泉[1] 支晓伟[1] 

机构地区：[1]中国矿业大学能源与安全工程学院,江苏徐州221008

出　　处：《中国矿业大学学报》2005年第3期299-302,共4页Journal of China University of Mining & Technology

基　　金：国家自然科学基金资助项目(50134040);江苏省自然科学基金重点项目(BK200315);教育部科学技术研究重点项目资助(重点01027)

摘　　要：在急倾斜煤层矿井中,上山掘进时突出频繁发生,因此,找出可以防止突出的卸压区长度及其应力分布有着重要的意义.本文首先对掘进头前方煤体进行了一定的假设,进而从力学的角度分析掘进头前方煤体的应力分布状况,并得出了一个方程组.采用它可以计算防止突出的卸压区长度.最后,应用Mathcad计算出了4种条件下防止突出的卸压区长度以及当y=z=0时卸压区的正应力表达式,并用Matlab绘画出来该条件下的应力分布图.理论分析结果与实际情况基本一致,因此,它们可以用来指导现场的防突工作.The outburst takes place in the raise tunnelling frequently if the seam is slope sharply. Therefore, it is very important to look for the distressed zone's length and it's stress distribution in order to prevent the outburst. Firstly, some suppositions were set up for the coal in the front of the tunnelling place. Then, the stress distribution in the front of the tunnelling place was analyzed, and an equation group was obtained. The length of distressed zone that can prevent the outburst can be calculated by using it. Finally , the length was computed in four conditions, and the stress formula of the distressed zone was deduced in the condition of y=z=0 by making use of Mathcad. The picture of stress distribution was also drawn by making use of Matlab. The conclusion of the theoretical analysis is accordance with practical conditions. Therefore, it can be used to guide the work of preventing outburst.

关 键 词：上山掘进 卸压区 长度分析 MATHCAD Matlab 急倾斜煤层 应力分布 分布状况 角度分析 分析结果 防突工作 掘进头 突出 防止 方程组 表达式 正应力 分布图 煤体 计算 矿井 

分 类 号：TD263.23[矿业工程—矿井建设] TD353