高位硬厚岩层下覆岩运移规律研究
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摘要
杨柳煤矿1061工作面上覆硬厚岩层。针对工作面地质条件,采用数值模拟方法,研究了硬厚岩层下开采覆岩运移规律。研究表明:在破断前,上覆硬厚岩层没有发生明显的位移下沉,硬厚岩层对地层变形起到了"桥式屏蔽作用";破断后,下沉量突然增加,表现出明显的突变性,导致地表移动变形急剧增加,出现大幅度下沉。通过现场支架压力实测进行了验证。
There are hard and thick rock strata overlying on No. 1061 working face of Yangliu Coal Mine. According to the geological conditions of the working face,the numerical simulation method is used to study the migration law of overlying strata under hard and thick rocks. The results show that there is no obvious displacement and subsidence in the overlying strata before the hard and thick rock strata breaks,with a " bridge shielding effect" on ground deformation;After the rock strata breaks,series of phenomenon appear,including suddenly increase in subsidence and an obvious mutation,which lead to a sharp increase in ground deformation and a large amplitude subsidence. This result was verified by the support pressure measurement on the field.
There are hard and thick rock strata overlying on No. 1061 working face of Yangliu Coal Mine. According to the geological conditions of the working face,the numerical simulation method is used to study the migration law of overlying strata under hard and thick rocks. The results show that there is no obvious displacement and subsidence in the overlying strata before the hard and thick rock strata breaks,with a " bridge shielding effect" on ground deformation;After the rock strata breaks,series of phenomenon appear,including suddenly increase in subsidence and an obvious mutation,which lead to a sharp increase in ground deformation and a large amplitude subsidence. This result was verified by the support pressure measurement on the field.
引文
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[3]刘晓明,赵同彬,王明强,等.固体充填工作面支架工作特性及顶板控制分析[J].山东科技大学学报:自然科学版,2017,36(2):42-47.Liu Xiaoming,Zhao Tongbin,Wang Mingqiang,et al.Analysis of working characteristics and roof control of backfilling hydraaulic suppor[tJ].Journal of Shandong University of Science and Technology:Natural Science,2017,36(2):42-47.
[4]蒋金泉,代进,王普,等.上覆硬厚岩层破断运动及断顶控制[J].岩土力学,2014,35(S1):264-270.Jiang Jinquan,Dai Jin,Wang Pu,et al.Overlying hard and thick strata breaking movement and broken-roof control[J].Rock and Soil Mechanics,2014,35(S1):264-270.
[5]吴士良,刘思利,佟金婉,等.综采采场顶板结构模型及“支架-围岩”关系研究[J].山东科技大学学报:自然科学版,2016,35(4):44-51.Wu Shiliang,Liu Sili,Tong Jinwan,et al.Study on roof sructure model and support-surrounding rock relatationship at fully-mechanized coal mining face[J].Journal of Shandong University of Science and Technology:Natural Science,2016,35(4):44-51.
[6]杨培举,何烨,郭卫彬.采场上覆巨厚坚硬岩浆岩致灾机理与防控措施[J].煤炭学报,2013,38(12):2106-2112.Yang Peiju,He Ye,Guo Weibin.Disaster-causing mechanism and control measures of extremely thick and hard magmatic rock above working face[J].Journal of China Coal Society,2013,38(12):2106-2112.
[7]郭惟嘉,刘利民,郭炳正,等.巨厚坚硬覆盖层矿井开采灾害与防治措施的研究[J].中国地质灾害与防治学报,1994,5(2):37-42.Guo Weijia,Liu Limin,Guo Bingzheng,et al.Study on prevention and control measures of mining disaster of thick and hard covering layer[J].The Chinese Joural of Geological Hazard and Control,1994,5(2):37-42.
[8]秦广鹏,蒋金泉,张培鹏,等.硬厚岩层破断机理薄板分析及控制技术[J].采矿与安全工程学报,2014,31(5):726-732.Qin Guangpeng,Jiang Jinquan,Zhang Peipeng,etc.Thin plate analysis of hard thick strata failure mechanism and its control technology[J].Journal of Mining&Safety Engineering,2014,31(5):726-732.
[9]肖江,任奋华,王金安,等.高位巨厚岩浆岩断裂失稳机理研究[J].西安科技大学学报,2008,28(1):2-5.Xiao Jiang,Ren Fenghua,Wang Jin′an,et al.Study on the mechanism of fracture instability of high and thick magmatic rocks[J].Journal of Xi′an University of Science and Technology,2008,28(1):2-5.
[10]轩大洋,许家林,冯建超.巨厚火成岩下采动应力演化规律与致灾机理[J].煤炭学报,2011,36(8):1252-1257.Xuan Dayang,Xu Jialin,Feng Jianchao.Disaster and evolvement law of mining-induced stress under extremely thick igneous rock[J].Journal of China Coal Society,2011,36(8):1252-1257.
[11]廖孟柯,高峰,李树荣,等.采场厚老顶破断规律分析[J].矿业安全与环保,2006,33(6):4-6.Liao Mengke,Gao Feng,Li Shurong,et al.Analysis on the law of breaking and breaking of the thick old roof of the stope[J].Mining Safety and Environmental Protection,2006,33(6):4-6.