摘要
利用数值计算方法,研究了顶板强度对回采巷道围岩应力分布、塑性区范围及底鼓的影响,结果表明:巷道顶板强度提高后,巷旁支承压力峰值将向巷帮深部移动,顶板中的水平应力增加,巷道底板的塑性区范围明显减小,巷道底鼓量也将减小。在此基础上,提出了加固巷道顶板控制底鼓的观点。
The influence of roof strength on the stress distribution, plastic yielding area of surrounding rock and floor heave of gateway was analyzed using numerical simulation. The results indicate that the peak value of side abutment pressure was transferred to the deeper of both sides of the gateway, the horizontal stress in the roof was increased, the plastic yielding area of the floor and the magnitude of floor heave were reduced obviously after the roof were strengthened. On the basis of the analysis, the view that strengthen the roof can control the floor heave was put forward.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2003年第4期436-439,共4页
Journal of China University of Mining & Technology
基金
教育部博士点基金(1999029008)
