Stability of workface using long-wall mining method in extremely thin and gently inclined iron mine
Long-wall mining method has its own advantages, such as small mining-cutting ratio, the simple technique of recovery, high level of mechanization etc, which is the optimal method used to mine gently inclined and extremely thin iron mine. How to ensure the safety of workers and equipment during mining is the key technical process. Based on elastic-plastic mechanics theory, the mechanic model of long-wall method mining gently inclined and extremely thin iron mine is established and the critical safety distance of workface is obtained. With the FLAC-2D simulation software, the rule of stress change, the deformation of workface and surrounding rock in different control-roof width are also summarized. The final results accord with the ones of theory test. We confirm the support-frame resistance of workface by Analogy-statistic method. The results prove that hydraulic support-frame have the ability to provide enough pressure to assure the stability of working face within the 5-meter of control-roof width.
long-wall method extremely thin iron mine surrounding rock stability
SONG Weidong XU Wenbin DU Jianhua WAN Haiwen
State Key Laboratory of High-Efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing,Ministry of Education, Beijing 100083, China School of Civil and Environment Engineering, University of Science and Technology Beijing, Beijing 100083, China
国际会议
The First International Symposium on Mine Safety Science and Engineering (首届矿山安全科学与工程学术会议)
北京
英文
192-199
2011-10-27（万方平台首次上网日期，不代表论文的发表时间）