RESEARCH ON CENTRIFUGAL MODEL EXPERIMENT OF DEEP-BURIED COAL SEAM
LIU Deqian1，JIANG Zhenquan2，LI Jianshuo2，FENG Haiying1
(1. School of Civil Engineering，Hebei University of Engineering，Handan，Hebei 056038，China； 2. School of Resource and Earth Science，China University of Mining and Technology，Xuzhou，Jiangsu 221008，China)
Abstract：Considering the geotechnical conditions of the Zhaolou coal mine，similitude material centrifugal experiment is done，and the stress variation at different positions in coal seam roof is found. The following results have been drawn. (1) Because of the excavation of coal，the pressure variation of coal pillar is evident，the influencing distance is about 35 m，10–15 m ahead the working face；and the maximum pressure concentration coefficient is produced，which reaches 2.8. (2) The pressure of immediate roof reaches its peak value，which is 1.74，immediately when the working face arrives；and it decreases firstly and then rises after the working face passes. (3) The peak value of the pressure of the basic roof occurs after 5–10 m excavation of coal，and the corresponding maximum pressure concentration coefficient reaches 3.91 on the condition of basic roof. Therefore special measures must be carried out. (4) The step of rupture on the basic roof is about 30 m. The research results are important to the design of coal channel，the excavation，and the prevention of geotechnical disaster.
刘德乾，姜振泉，李建硕，冯海英. 深埋煤层开采的离心模型试验研究[J]. 岩石力学与工程学报, 2009, 28(S2): 3909-3913.
LIU Deqian1，JIANG Zhenquan2，LI Jianshuo2，FENG Haiying1. RESEARCH ON CENTRIFUGAL MODEL EXPERIMENT OF DEEP-BURIED COAL SEAM. , 2009, 28(S2): 3909-3913.
