Numerical research on stability control of roofs of water-rich roadway  

作　　者：Meng Chao Li Xuehua Yao Qiangling Zhou Jian 

机构地区：[1]School of Mines, China University of Mining and Technology [2]Key Laboratory of Deep Coal Resource Mining, Ministry of Education [3]Shenhua Overseas Company in Russia

出　　处：《International Journal of Mining Science and Technology》2014年第3期409-416,共8页矿业科学技术学报（英文版）

基　　金：the National Natural Science Foundation of China (No. 51304208);the Science and Technology Research of the Ministry of Education of China

摘　　要：In order to study the strength-weakening law of roofs of water-rich roadway, this study used FLAC software, and simulated and analyzed the failure characteristics of the surrounding rock of water-rich roadway under the condition of different cross sections and support parameters, finally obtained the stress distribution of the principle stress of the roadway as well as the displacement variation of its surrounding rock. Results indicate that the roof stability of roadway with semicircular cross section is better than the roadway with inclined rectangular cross section under water-rich condition. Besides, the surrounding rock deformation of roadway under the action of water shows a pronounced increase compared to the roadway without the action of water due to the fact that water will obviously weaken the surrounding rock of roadway, especially its roof. It is very beneficial to control roof stability of water-rich roadway and guarantee the roadway stability during its service life by improving the pretension of bolt and cable as well as decreasing inter-row spacing of the bolt.In order to study the strength-weakening law of roofs of water-rich roadway, this study used FLAC soft-ware, and simulated and analyzed the failure characteristics of the surrounding rock of water-rich road-way under the condition of different cross sections and support parameters, finally obtained the stress distribution of the principle stress of the roadway as well as the displacement variation of its surrounding rock. Results indicate that the roof stability of roadway with semicircular cross section is better than the roadway with inclined rectangular cross section under water-rich condition. Besides, the surrounding rock deformation of roadway under the action of water shows a pronounced increase compared to the roadway without the action of water due to the fact that water will obviously weaken the surrounding rock of roadway, especially its roof. It is very beneficial to control roof stability of water-rich roadway and guarantee the roadway stability during its service life by improving the pretension of bolt and cable as well as decreasing inter-row spacing of the bolt.

关 键 词：Water-rich roadway Roof control Numerical simulation Bolt support 

分 类 号：TD353.6[矿业工程—矿井建设]