高位硬厚岩层破断规律及其动力响应分析

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (1060 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要以杨柳煤矿10416工作面高位硬厚岩浆岩条件为背景，建立高位硬厚岩层三边固支一边简支弹性薄板力学模型，利用瑞利–里兹法，推导出硬厚岩层挠曲函数与应力近似解析式，得到破断跨度的计算式，并根据覆岩破裂形态提出破断步距的计算方法。采用微震、支架压力及地表下沉等监测分析，揭示高位硬厚岩层破断失稳规律及其动力响应。研究表明：高位硬厚岩层破断前的挠度最大点为(x =a /2，y =13b/(10π)) (a为硬厚岩层走向悬露长度，b为硬厚岩层沿倾向的悬露长度)；当a＜1.049b时，硬厚岩层首先沿倾向固支边发生破断，否则首先沿走向固支边发生破断；硬厚岩层初次破断形式为沿走向对称而沿倾向非对称的“O-X”型，且破断后侧向跨度固支侧大于简支侧。高位硬厚岩层破断及运移过程中微震活动加剧，产生强微震活动，破断失稳期间支架压力显著升高，并引起地表下沉明显变化。高位硬厚岩层破断失稳引起强烈的动力响应，采用理论计算和微震监测可以进行分析预测。

	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

关键词 ：采矿工程, 高位硬厚岩层, 破断步距, 微震活动, 地表下沉

Abstract：An elastic model of thin plate with three edges fixed and one simply supported was established as the mechanical model of high and thick strata of hard magmatic rock at working front 10416 in Yangliu coal mine，A flexural function and an analytic expression of stresses for the hard and thick strata were derived with Rayleigh-Ritz method. A formula of fracture span was obtained；and then a method of calculating the length of drawing pace of fracturing according to fracture morphology of overburden was proposed. The analysis of monitored results of microseism，supporting pressures and surface subsidence revealed the fracture process and the dynamic response of high and thick strata of hard rocks. The point of maximum deflection prior to fracturing of strata is at the location of and ，where a is suspension length along the strike of hard-thick strata；b is suspension length along the tendency of hard-thick strata. Fracture first happened along the dip clamper edge if a＜1.049b，along the strike clamper edge otherwise. The initial form of fracturing is “O-X” shaped，which is symmetrically along the strike but asymmetrically along the tend. Microseismicity intensified during the process of fracturing and movement of strata leading to the strong microseismicities activities to be generated and the supporting pressure and surface subsidence significantly be increased. Fracturing of high and thick strata of hard rocks causes strong dynamic response which can be analyzed and predicted by theoretical calculation and microseismic monitoring.

Key words： mining engineering high and thick strata of hard rock drawing pace of fracturing microseismicity subsidence

收稿日期: 2013-10-11

引用本文:

蒋金泉1，张培鹏2，聂礼生3，李洪1，许丽娜2，王伟东2. 高位硬厚岩层破断规律及其动力响应分析[J]. 岩石力学与工程学报, 2014, 33(7): 1366-1374.
JIANG Jinquan1，ZHANG Peipeng2，NIE Lisheng3，LI Hong1，XU Lina2，WANG Weidong2. FRACTURING AND DYNAMIC RESPONSE OF HIGH AND THICK STRATAS OF HARD ROCKS. , 2014, 33(7): 1366-1374.

链接本文:

http://www.rockmech.org/CN/Y2014/V33/I7/1366

[3]	钱鸣高，缪协兴，许家林，等. 岩层控制的关键层理论[M]. 徐州：中国矿业大学出版社，2003：10-18.(QIAN Minggao，MIAO Xiexing，XU Jialin，et al. Key strata theory on strata control[M]. Xuzhou：China University of Mining and Technology Press，2003：10-18.(in Chinese)) " target="_blank">
[7]	黄耀光，浦海. 不同边界下的坚硬顶板极限承载分析及破断距确定[J]. 煤矿开采，2012，17(2)：12-16.(HUANG Yaoguang，PU Hai. Analysis of roof limit load and broken pace under different boundary conditions[J]. Coal Mining Technology，2012，17(2)：12-16.(in Chinese))
[9]	贺虎，窦林名，巩思园，等. 覆岩关键层运动诱发冲击的规律研究[J]. 岩土工程学报，2010，32(8)：1 260-1 265.(HE Hu，DOU Linming，GONG Siyuan，et al. Rock burst rules induced by cracking of overlying key stratum[J]. Chinese Journal of Geotechnical Engineering，2010，32(8)：1 260-1 265.(in Chinese))
[11]	贾喜荣. 岩石力学与岩层控制[M]. 徐州：中国矿业大学出版社，2010：253-300.(JIA Xirong. Rock mechanics and strata control[M]. Xuzhou：China University of Mining and Technology Press，2010：253-300.(in Chinese)) " target="_blank">
[13]	蒋金泉，张开智. 综放开采矿震的成因及防治对策[J]. 岩石力学与工程学报，2006，25(增1)：3 276-3 282.(JIANG Jinquan，ZHANG Kaizhi. Cause and control method of mine earthquake in fully mechanized top coal caving mining[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(Supp.1)：3 276-3 282.(in Chinese))
[15]	SLAWOMIR J G，ANDRZEJ K. 矿山地震学引论[M]. 修济刚译. 北京：地震出版社，1998：283-315.(SLAWOMIR J G，ANDRZEJ K. An introduction to mining seismology[M]. Translated by XIU Jigang. Beijing：Earthquake Publish House，1998：283-315.(in Chinese)) " target="_blank">
[17]	卢新伟，窦林名，王国瑞，等. 巨厚火成岩下矿震分布特征分析[J]. 煤炭工程，2010，60(7)：54-57.(LU Xinwei，DOU Linming，WANG Guorui，et al. Analysis of mine seismic distribution features under ultra thick igneous rock[J]. Coal Engineering，2010，60(7)：54-57.(in Chinese))
[8]	王晓亮，窦林名，李凤荣，等. 采空区上方巨厚硬岩破断的力学分析[J]. 煤炭科学技术，2009，34(2)：13-15.(WANG Xiaoliang，DOU Linming，LI Fengrong，et al. Mechanical analysis of thick hard rock breaking above goaf[J]. Coal Science and Technology，2009，34(2)：13-15.(in Chinese))
[12]	张益东，程敬义，王晓溪，等. 大倾角仰(俯)采采场顶板破断的薄板模型分析[J]. 采矿与安全工程学报，2010，27(4)：487-493. (ZHANG Yidong，CHENG Jingyi，WANG Xiaoxi，et al. Thin plate model analysis of roof break of up-dip or down-dip mining stope[J]. Journal of Mining and Safety Engineering，2010，27(4)：487-493.(in Chinese)) " target="_blank">
[16]	何江，窦林名，贺虎，等. 综放面覆岩运动诱发冲击矿压机制研究[J]. 岩石力学与工程学报，2011，30(增2)：3 920-3 927.(HE Jiang，DOU Linming，HE Hu，et al. Mechanism study of overlying strata movement inducing rock burst on top-coal caving face[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(Supp.2)：3 920-3 927.(in Chinese))
[4]	谭云亮，宁建国，顾士坦，等. 矿山压力与岩层控制[M]. 北京：煤炭工业出版社，2011：13-14.(TAN Yunliang，NING Jianguo，GU Shitan，et al. Mining pressure and strata control[M]. Beijing：China Coal Industry Publishing House，2011：13-14.(in Chinese)) " target="_blank">
[5]	蒋金泉. 采场围岩应力与运动[M]. 北京：煤炭工业出版社，1993：9-74.(JIANG Jinquan. Mining stope surrounding rock stress and movement[M]. Beijing：China Coal Industry Publishing House，1993：9-74.(in Chinese)) " target="_blank">
[1]	杜斌斌，陆菜平，刘彪，等. 火成岩下开采矿压显现规律的相似模拟研究[J]. 金属矿山，2012，41(2)：36-39.(DU Binbin，LU Caiping，LIU Biao，et al. Similar simulation research of mining pressure law under the igneous rock situation[J]. Metal Mine，2012，41(2)：36-39.(in Chinese))
[2]	钱鸣高，石平五，许家林. 矿山压力与岩层控制[M]. 徐州：中国矿业大学出版社，2010：65-99.(QIAN Minggao，SHI Pingwu，XU Jialin. Mining pressure and strata control[M]. Xuzhou：China University of Mining and Technology Press，2010：65-99.(in Chinese)) " target="_blank">
[6]	王平，姜福兴，冯增强，等. 高位厚硬顶板断裂与矿震预测的关系探讨[J]. 岩土工程学报，2011，33(4)：618-623.(WANG Ping，JIANG Fuxing，FENG Zengqiang，et al. Relationship between fracture of high-position thick and hard roof and mine quake forecast[J]. Chinese Journal of Geotechnical Engineering，2011，33(4)：618-623.(in Chinese))
[10]	刘人怀. 板壳力学[M]. 北京：机械工业出版社，1990：71-111.(LIU Renhuai. Plate and shell mechanics[M]. Beijing：China Machine Press，1990：71-111.(in Chinese)) " target="_blank">
[14]	郑怀昌，张晓君. 冒落型矿震能量确定探讨[J]. 金属矿山，2006，35(7)：24-26.(ZHENG Huaichang，ZHANG Xiaojun. Investigation on energy determination for cave-in type mining tremor[J]. Metal Mine，2006，35(7)：24-26.(in Chinese))