大采高工作面煤壁失稳特征及失稳区域预测
Coal Wall Instability Characteristics and Instability Region Predict of Large Mining Height Working Face
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摘要: 针对大采高工作面煤壁失稳特征进行分析，提出了煤壁中弱化点（弱化面）的存在是导致大采高煤壁局部失稳片帮的根本原因。根据煤壁失稳区域破坏特征，利用毕肖普条分法建立了煤壁临界失稳滑移力学模型，推导出煤壁安全稳定性计算公式。结合赵固二矿大采高工作面实际工程地质条件，得出该矿大采高工作面煤壁中弱化点（弱化面）在不同位置处的临界失稳滑移面，进而预测了煤壁失稳破坏煤体的范围。在此基础上提出了控制煤壁失稳破坏的方法，有效地解决了大采高工作面煤壁失稳破坏给生产带来的安全隐患。Abstract: Coal wall instability failure characteristics were analyzed in view of large mining height, and the existence of coal wall weaken points (weaken surface) leading to root causes of large mining height local instability is proposed. According to characteristics of coal wall buckling instability region, coal wall instability sliding mechanics model was established by using Bishop's slice method, and calculation formula of coal wall stability was deduced. In combination with large mining height actual engineering geological conditions in Zhaogu No.2 Coal Mine, it obtained coal wall weaken points (weakened surface) of large mining height working face in different locations of the critical instability of slip plane, and then instability and failure of coal wall coal area was predicted. Measures of preventing damage coal wall instability were proposed on the basis of this, and instability and failure of large mining height coal wall brings to production of safe hidden trouble was effectively solved.
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[1] 弓培林.大采高采场围岩控制理论及应用研究[M].北京:煤炭工业出版社,2006（9）. [2] 宁宇.大采高综采煤壁片帮冒顶机理与控制技术[J].煤炭学报, 2008,33(5):481-484. [3] 闫少宏,尹希文.大采高综放开采几个理论问题的研究[J].煤炭学报,2009,34(1): 50-52. [4] 陈光炎,钱明高.中国煤矿采场围岩控制[M].徐州:中国矿业大学出版社,1994. [5] 王金华.大采高综采技术与装备的现状及发展趋势[J].煤炭科学技术,2006,34(1):4-7. [6] 徐永圻.煤矿开采学[M].徐州:中国矿业大学出版社,1993. [7] 刘少伟,张辉.沿顶掘进回采巷道上帮煤体失稳区域预测[J].煤炭学报, 2010,35(9):1430-1434. [8] 郝海金,吴健.大采高开采上位岩层平衡结构及其对采场矿压显现的影响[J].煤炭学报, 2009,29(2):137-141. [9] 刘少伟,张辉.倾斜煤层回采巷道上帮煤体滑移危险分析与应用[J].中国矿业大学学报, 2011,40(1):14-17. [10] 赵明阶.边坡工程处治技术[M].北京:人民交通出版社，2003. [11] 卢廷浩,刘祖德.高等岩土力学[M].北京:机械工业出版社,2006. [12] 龚晓南.土力学[M].北京:中国建筑工业出版社,2002.
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