高强度开采工作面顶板动载冲击效应分析

doi:10.13722/j.cnki.jrme.2014.1148

摘要
图/表
参考文献(20)
相关文章 (15)

全文: PDF (1525 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要采用理论分析、室内试验及现场实测方法分析高强度采场顶板动载冲击效应发生条件、机制及影响因素。采场围岩组成的非理想刚体系统为围岩发生动力破坏提供条件，建立老顶动力断裂失稳的折迭突变模型，老顶岩层峰后软化模量大于弹性模量是导致突发动力性断裂失稳的内在原因；在确定塑性区范围的基础上得到老顶由弹性稳定状态过渡至整体断裂失稳状态过程中塑性耗散功、断裂面表面能及破断岩块初始动能的解析解；建立老顶断裂线处于煤壁上方不同位置的老顶结构模型并得到老顶发生动载冲击现象的结构条件及冲击作用力的表达式；工作面推进速度加快等效于老顶悬臂梁加载速率提高，老顶岩层抗拉强度的伪增强导致老顶断前储存于悬臂梁中的弹性应变能增多、破断岩块初始动能占总应变能的比例升高，增大了高强度开采工作面老顶发生动力破断失稳的概率。研究成果应用于王庄煤矿，可解释8101工作面发生大范围切顶压架事故原因并可指导围岩加固方式的改善工作。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	王家臣
	王兆会

关键词 ：采矿工程, 高强度采场, 动载冲击效应, 推进速度

Abstract：Support crushing disaster caused by dynamic load of main roof is a challenge in high-intensity mining face，theoretical analysis，laboratory test and in-situ monitoring were carried out for analyzing occurred conditions，mechanism and affecting factors of the dynamic impact effect. Nonideal rigid system made up of different strata provided conditions for dynamic failure of surrounding rock，fold catastrophe model of main roofs dynamic fracture was built and main roof showed dynamic fracture because its softening modulus was larger than elastic modulus. With elastic-plastic analysis of main roof，calculation formulas of dissipated plastic power，fracture surface energy and kinetic energy of the block were put forward. Two kinds of roof structures including that fracture line was ahead of mining face or located above the coal wall correctly were built. Then roof structures leading to dynamic impact effect and the impact force were obtained. Increase of advancing speed was equivalent to upgrading the cantilever beams loading speed，and thus amplifying the strain energy stored in main roof and also improving the blocks kinetic energy proportion of the total strain energy. As a result，the probability of main roofs dynamic fracture was magnified. Finally，conclusions were successfully applied into Wangzhuang coal mine and surrounding rock controlling technology and its effect were improved.

Key words： mining engineering high-intensity mining face dynamic load impact effect advancing speed

引用本文:

王家臣，王兆会. 高强度开采工作面顶板动载冲击效应分析[J]. 岩石力学与工程学报, 2015, 34(S2): 3987-3997.
WANG Jiachen，WANG Zhaohui. IMPACT EFFECT OF DYNAMIC LOAD INDUCED BY ROOF IN HIGH-INTENSITY MINING FACE. , 2015, 34(S2): 3987-3997.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2014.1148 或 https://rockmech.whrsm.ac.cn/CN/Y2015/V34/IS2/3987

[1]	董全杨，蔡袁强，王军，等. 松散砂土不稳定性试验研究[J]. 岩石力学与工程学报，2014，33(3)：623-630.(DONG Quanyang，CAIYuanqiang，WANG Jun，et al. Experimental study of instability of loose sand[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(3)：623-630.(in Chinese))
[2]	陈苏社. 特殊地质条件下综采工作面顶板控制技术[J]. 煤炭科学技术，2014，42(2)：124-128.(CHEN Sushe. Roof control technology of fully-mechanized coal mining face under special geological conditions[J]. Coal Science and Technology，2014，42(2)：124-128. (in Chinese))
[3]	杨敬轩，鲁岩，刘长友，等. 坚硬厚顶板条件下岩层破断及工作面矿压显现特征分析[J]. 采矿与安全工程学报，2013，30(2)：211-217.(YANGJingxuan，LU Yan，LIU Changyou，et al. Analysis on the rock failure and strata behavior characteristicsunder the condition of hard and thick roof[J]. Journal of Mining andSafety Engineering，2013，30(2)：211-217.(in Chinese))
[4]	钱鸣高，缪协兴. 采场上覆岩层结构的形态与受力分析[J]. 岩石力学与工程学报，1995，14(2)：97-105.(QIAN Minggao，MIAO Xiexing.Mechanical analysis of strata structure above the working face[J]. Chinese Journal of Rock Mechanics and Engineering，1995，14(2)：97-105.(in Chinese))
[5]	缪协兴，陈荣华，浦海，等. 采场覆岩厚关键层破断与冒落规律分析[J]. 岩石力学与工程学报，2005，24(8)：1289-1295.(MIAO Xiexing，CHEN Ronghua，PUHai，et al. Analysis of breakage and collapse of thick key strata around coal face[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(8)：1289-1295.(in Chinese))
[6]	陈忠辉，谢和平，李全生. 长壁工作面采场围岩铰接薄板组力学模型研究[J]. 煤炭学报，2005，30(2)：172-176.(CHENZhonghui，XIEHeping，LIQuansheng. Study on plate group mechanicalmodel formain roof of longwall face[J]. Journal of China Coal Society，2005，30(2)：172-176.(in Chinese))
[7]	屠洪盛，屠世浩，陈芳，等. 基于薄板理论的急倾斜工作面顶板初次变形破断特征研究[J]. 采矿与安全工程学报，2014，31(1)：49-59.(TUHongsheng，TUShihao，CHENFang，et al. Study on the deformation and fracture feature of steep inclinedcoal seam roof based on the theory of thin plates[J]. Journal of Mining andSafety Engineering，2014，31(1)：49-59.(in Chinese))
[8]	杨强，陈新，周维垣. 岩土材料弹塑性损伤模型及变形局部化分析[J]. 岩石力学与工程学报，2004，23(21)：3577-3583.(YANG Qiang，CHEN Xin，ZHOU Weiyuan. Elastic-plastic damage model for geomaterials and strain localization analysis[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(21)：3577-3583.(in Chinese))
[9]	陆银龙，王连国. 含断层煤层底板损伤破坏演化数值模拟及微震监测研究[J]. 采矿与安全工程学报，2013，30(1)：38-44.(LUYinlong，WANG Lianguo. Modeling and micro-seismic monitoring of damageand failure evolution of faulty coal seam floor[J]. Journal of Mining andSafety Engineering，2013，30(1)：38-44.(in Chinese))
[10]	许家林，鞠金峰. 特大采高综采面关键层结构形态及其对矿压显现的影响[J]. 岩石力学与工程学报，2011，30(8)：1 547-1 556.(XU Jialin，JU Jinfeng. Structuremorphology keystratum and its influence on strata behaviors in fully-mechanized face with super-large miningheight[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(8)：1 547-1 556.(in Chinese))
[11]	弓培林，靳钟铭. 大采高综采采场顶板控制力学模型研究[J]. 岩石力学与工程学报，2008，27(1)：193-198.(GONG Peilin，JIN Zhongming. Mechanical model study on roof control for fully- mechanizedcoal face with large mining height[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(1)：193-198.(in Chinese))
[12]	赵阳升，冯增朝，万志军. 岩体动力破坏的最小能量原理[J]. 岩石力学与工程学报，2003，22(增1)：1 781-1 783.(ZHAOYangsheng，FENGZengchao，WANZhijun. Least energy principleof dynamical failure of rock mass[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(Supp.1)：1 781-1 783.(in Chinese))
[13]	潘岳. 岩石破坏过程的折迭突变模型[J]. 岩土工程学报，1999，21(3)：299-303.(PAN Yue. Fold catastrophe model of damaging process in rock[J]. Chinese Journal of Geotechnical Engineering，1999，21(3)：299-303.(in Chinese))
[14]	张黎明，王在泉，张晓娟，等. 岩体动力失稳的折迭突变模型[J]. 岩土工程学报，2009，31(4)：552-557.(ZHANG Liming，WANG Zaiquan，ZHANG Xiaojuan，et al. Fold catastrophe model of rock dynamic destabilization[J]. Chinese Journal ofGeotechnical Engineering，2009，31(4)：552-557.(in Chinese))
[15]	唐春安，徐小荷. 岩石破裂过程失稳的尖点灾变模型[J]. 岩石力学与工程学报，1990，9(2)：100-107.(TANG Chun¢an，XU Xiaohe. Cusp catastrophicmodel of rock dynamic destabilization[J]. Chinese Journal of Rock Mechanics and Engineering，1990，9(2)：100- 107.(in Chinese))
[16]	赵延林，吴启红，王卫军，等. 基于突变理论的采空区重叠顶板稳定性强度折减法及应用[J]. 岩石力学与工程学报，2010，29(7)：1 424-1 434.(ZHAO Yanlin，WU Qihong，WANG Weijun，et al. Strength reduction method to study stability of goaf overlapping roof based on catastrophe theory[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(7)：1424-1 434.(in Chinese))
[17]	杨敬轩，刘长友，于斌，等. 坚硬厚层顶板群结构破断的采场冲击效应[J]. 中国矿业大学学报，2014，43(1)：8-15.(YANG Jingxuan，LIU Changyou，YU Bin，et al. Impact effect caused by the fracture of thick and hard roof structures in a longwall face[J]. Journal of China University of Mingand Technology，2014，43(1)：8-15.(in Chinese))
[18]	WANG JC，YANG SL，LI Y，et al. A dynamic method to determine the supports capacity in longwall coal mining[J]. International Journal of Mining，Reclamation and Environment，2014，1(1)：1-14.
[19]	WAWERSIK W，FAIRHURST C. A study of brittle fracture in laboratory compression experiments[J]. International Journal of Rock Mechanics and Mining Sciences，1970，7：561-575.
[20]	SHARAN SK. Exact and approximate solutions for displacements around circular openings in elastic-brittle-plastic Hoek-Brown rock[J]. International Journal of Rock Mechanics and Mining Sciences，2005，42(4)：542-549.