[1]赵鹏燕,冯海英,刘德乾.首采区工作面遇断层时顶板的力学分析和数值模拟[J].西安科技大学学报,2010,(03):296-300.
 ZHAO Peng-yan,FENG Hai-ying,LIU De-qian.Mechanics analysis and numerical simulation of roof with workface fault in first[J].Journal of Xi'an University of Science and Technology,2010,(03):296-300.
点击复制

首采区工作面遇断层时顶板的力学分析和数值模拟()
分享到:

西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2010年03期
页码:
296-300
栏目:
出版日期:
2010-03-29

文章信息/Info

Title:
Mechanics analysis and numerical simulation of roof with workface fault in first
文章编号:
1672-9315(2010)03-0296-05
作者:
赵鹏燕冯海英刘德乾
河北工程大学 土木工程学院,河北 邯郸 056038
Author(s):
ZHAO Peng-yan FENG Hai-ying LIU De-qian
School of Civil Engineering,Hebei University of Engineering, Handan 056038,China
关键词:
断层 采煤工作面 矿山压力 力学分析 数值模拟
Keywords:
fault long-wall workface ground pressure mechanics analysis numerical simulation
分类号:
TD32
文献标志码:
A
摘要:
根据首采区煤层回采工作面遇到断层时的工程地质模型,建立了工作面揭露断层前,和回采过断层后的力学模型,并对其进行了分析和数值模拟,由于约束条件的差异,煤层顶板在回采断层前后的受力明显不同。结果表明:揭露断层前,顶板岩层最大剪应力发生在固定端,大小为上覆梁荷载的0.625,最大弯矩发生在距离固定端0.625倍的跨度处; 临近断层时,工作面直到断层处的煤层,同预留煤柱的受力情况相同,工作面越向断层推进,煤层的支承压力越高,易发生片帮,为煤的抗压强度控制; 回采过断层后,顶板岩层的最大剪应力和最大弯矩均发生在固定端,开切眼处煤柱最大剪应力增加,易发生煤柱压碎和顶板整体断落。
Abstract:
According to the geologic model when workface encounter fault, two mechanics model are built, one is the workface uncovers fault, another is workface just crosses fault.Because of restriction condition, the coal roof mechanics behaviors are different before and after the fault. Conclusions are: ①before exposure fault, the most shearing strength of roof is happened at fastness end,that is 0.625 of over load, the most moment is happened at the point of 0.625 of the span; ②when workface is nearer to fault, coal bed between the workface and fault just like coal pole, the bearing pressure rises with the workface advances, coal side is easy to crush, it is controlled by the coal intensity of pressure; ③when workface is across the fault, the most shear strength and moment are all happened at the fastened point, the pressure of coal pole rises, it can be crushed and then the roof is broken integrity. The research results is important to design of coal channel, excavation, and prevention of geotechnical disaster.

参考文献/References:

[1] 孟召平,彭苏平,黎 洪.正断层附近煤的物理力学性质变化及其对矿压分布的影响[J].煤炭学报,2001,26(6):561-566. MENG Zhao-ping,PENG Su-ping,LI Hong.Influence of normal faults on the physical and mechanical properties of coal and the distribution of underground pressure[J].Journal of China Coal Society,2001,26(6):561-566.
[2] 李忠华,潘一山.断层冲击地压的影响因素与震级分析[J].岩石力学与工程学报,2005,24(增1):5 206-5 230. LI Zhong-hua,PAN Yi-shan.Influencing factors and magnitude analysis of fault rockbrust[J].Chinese Journal of Rock Mechanics and Engineering, 2005,24(supp1.1):5 206-5 230.
[3] 王金安,刘 航,李 铁.临近断层开采动力危险区划分数值模拟研究[J].岩石力学与工程学报,2007,26(1):28-35. WANG Jin-an,LIU Hang,LI Tie.Study on numerical simulation of dynamic risk regionlization during exploitation approaching to faults[J].Chinese Journal of Rock Mechanics and Engineering, 2007,26(1):28-35.
[4] 何满潮,谢和平,彭苏萍,等.深部开采岩体力学研究[J].岩石力学与工程学报,2005,24(16):2 803-2 813. HE Man-chao,XIE He-ping,PENG Su-ping,et al. Study on rock mechanics in deep mining engineering[J]. Chinese Journal of Rock Mechanics and Engineering,2005,24(16):2 803-2 813.
[5] 王明洋,周泽平,钱七虎.深部岩体的构造和变形与破坏问题[J].岩石力学与工程学报,2006,25(3):448-455. WANG Ming-yang,ZHOU Ze-ping,QIAN Qi-hu. Tectnic deformation and failure problems of deep rock mass[J]. Chinese Journal of Rock Mechanics and Engineering,2006,25(3):448-455.
[6] 万清生.综采工作面过断层技术[J].煤炭科学技术, 2006,34(12):28-30. WAN Qing-sheng.Technology for fully mechanized longwall coal mining face through fault[J].Coal Science and Technology, 2006,34(12):28-30.
[7] 康天合,柴肇云,李义宝,等. 底层大采高综放全厚开采20 m特厚中硬煤层的物理模拟研究[J]. 岩石力学与工程学报,2007,26(5):1 065-1 072. KANG Tian-he,CHAI Zhao-yun,LI Yi-bao,et al. Study on physical simulation of full-seam mining for a 20 m very thick and medium hard seam by sub-level caving mining with high bottom cutting height[J]. Chinese Journal of Rock Mechanics and Engineering,2007,26(5):1 065-1 072.
[8] 钱鸣高,刘听成.矿山压力及其控制[M].北京:煤炭工业出版社,1984. QIAN Ming-gao, LIU Ting-cheng. Ground pressure and strata control[M]. Beijing: Coal Industry Press,1984.
[9] 史 红,姜福兴.采场上覆大厚度坚硬岩层破断规律的力学分析[J].岩石力学与工程学报,2004,18:3 066-3 069. SHI Hong, JIANG Fu-xing. Mechanics analysis of rupture regularity of hard and massive overlying strata of longwallface[J]. Chinese Journal of Rock Mechanics and Engineering,2004,18:3 066-3 069.
[10]赵扬锋,潘一山,于海军.基于剪切粱层间失效模型的断层冲击地压分析[J].岩土力学,2007,28(8):1 571-1 576. ZHAO Yang-feng,PAN Yi-shan,YU Hai-jun.Analysis of fault rockburst based on shear beam model for interface failure[J].Rock and Soil Mechanics,2007,28(8):1 571-1 576.

相似文献/References:

[1]王生全,刘柏根,张召召,等.遗传算法的BP网络模型进行瓦斯涌出量预测[J].西安科技大学学报,2012,(01):51.
 WANG Sheng-quan,LIU Bo-gen,ZHANG Zhao-zhao,et al.Prediction of gas emission quantity of mining faces based on genetic BP neutral network optimal model[J].Journal of Xi'an University of Science and Technology,2012,(03):51.
[2]刘 洋,伍永平,王永胜.断层上盘防水煤柱合理宽度研究[J].西安科技大学学报,2010,(05):523.
 LIU Yang,WU Yong-ping,WANG Yong-sheng.Rational width of waterproof coal pillars in hanging wall of fault[J].Journal of Xi'an University of Science and Technology,2010,(03):523.
[3]王有熙,邓广哲,曹 晶.断层带对深部地压影响的数值模拟[J].西安科技大学学报,2011,(06):818.
 WANG You-xi,DENG Guang-zhe,CAO Jing.Numerical simulation of fault-zone's influence on stress in deep mine[J].Journal of Xi'an University of Science and Technology,2011,(03):818.
[4]毛巨省.三峡左厂3号坝段坝基深层抗滑稳定性有限元分析[J].西安科技大学学报,2006,(03):296.
 MAO Ju-sheng.FEM simulation on deep sliding stability of No.3 dam foundation of leftpowerhouse of Three Georges Project[J].Journal of Xi'an University of Science and Technology,2006,(03):296.

备注/Memo

备注/Memo:
通讯作者: 赵鹏燕(1964-),男,北京昌平人,工程师,主要从事工程地质的教学和科研工作.
更新日期/Last Update: 2010-03-29