基于顶板切落的浅埋煤层开采支架工作阻力研究

杨登峰; 陈忠辉; 朱帝杰; 张凌凡; 刘鑫

doi:10.11779/CJGE2016S2047

基于顶板切落的浅埋煤层开采支架工作阻力研究 English Version

中国矿业大学(北京)力学与建筑工程学院,北京 100083

基金项目: 国家重点基础研究发展规划（“973”计划）项目（2013CB227903）; 国家自然科学基金项目（U1361209,51234005-1）

详细信息

作者简介:
杨登峰(1985- ),男,博士研究生,主要从事矿山压力与支架-围岩关系方面的研究工作。E-mail: kdydf@126.com。

计量
- 文章访问数: 270
- HTML全文浏览量: 2
- PDF下载量: 255
出版历程
- 收稿日期: 2016-05-18
- 发布日期: 2016-10-19

Support capacity at roof cutting in mining of shallow coal seam

School of Mechanics & Civil Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China

摘要

摘要: 针对浅埋煤层开采周期来压过程中顶板沿煤壁切落时支架工作阻力的确定方法进行研究。根据直接顶岩体在支承压力作用下破坏失稳的非线性变化特征,建立了由基本顶-直接顶-支架-矸石组成的系统力学模型,应用突变理论和岩石动力学相关分析方法,分别推导了系统失稳前静荷载和失稳后冲击动荷载作用下的支架压缩量表达式,获得了切顶过程中支架荷载的计算式,分析了其主要影响因素。通过对切顶时支架荷载的研究确定了其工作阻力的计算式。结果表明：直接顶的失稳破坏造成了顶板的切落,直接顶岩体的突跳量决定了冲击荷载的大小,系统失稳时的支架荷载除了与基本顶的周期来压步距、上覆岩层荷载、直接顶厚度有关外,还与支架和直接顶岩体的刚度比、直接顶岩体性质等因素相关。结合工程实例,验证了理论推导的合理性。理论研究成果对于分析切顶发生时的支架工作阻力大小,合理选择支架具有重要的工程意义。
- 浅埋煤层 /
- 切顶 /
- 支架工作阻力 /
- 突变理论 /
- 动荷载
Abstract: Aiming at the support capacity at roof cutting during periodic weighting in mining of shallow coal seam, according to the nonlinear variation characteristics of immediate roof under unstable failure of abutment pressure, a systematic mechanical model composed of upper roof-immediate roof support-waste rock is established. The expressions for support compression quantities under the static and dynamic loading before and after the system instability are derived by using the correlation analysis methods of catastrophic theory and rock dynamics. The formula for calculation the support capacity at roof cutting is obtained and the main factors for the support capacity are analyzed. The results show that the unstable failure of immediate roof leads to the roof cutting. The jump value of the displacement of immediate roof rock directly determines the amount of dynamic loading. The support capacity relates to the cyclic weighting interval, upper load, thickness of immediate roof, stiffness ratio of immediate roof and support and material parameters when the system fails. The rationality of the theoretical derivation is verified by engineering example. The test results are of great significance to the support capacity at roof cutting and the selection of support types.
- shallow coal seam /
- roof cutting /
- support capacity /
- catastrophic theory /
- dynamic load

HTML全文

参考文献(15)

[1]	黄庆享. 浅埋煤层长壁开采顶板结构及岩层控制研究[M]. 徐州: 中国矿业大学出版社, 2000. (HUANG Qing-xiang. Study on roof structure and ground control in shallow seam longwall mining[M]. Xuzhou: China University of Mining and Technology Press, 2000. (in Chinese))
[2]	高谦, 杨志强, 杨志法. 地下大跨度采场围岩突变失稳风险预测[J]. 岩土工程学报, 2000, 22(5): 523-527. (GAO Qian, YANG Zhi-qiang, YANG Zhi-fa. Instability forecast and risk evaluation of the surrounding rock masses for a large space stope[J]. Chinese Journal of Geotechnical Engineering, 2000, 22(5): 523-527. (in Chinese))
[3]	赵常洲, 李占强, 魏风华, 等. 地下工程中支架和围岩相互作用的突变模型[J]. 岩土力学, 2005, 26(增刊): 17-20. (ZHAO Chang-zhou, LI Zhan-qiang, WEI Feng-hua, et al. Catastrophe model of support and surrounding rock of underground engineering[J]. Rock and Soil Mechanics, 2005, 26(S0): 17-20. (in Chinese))
[4]	秦四清, 何怀锋. 狭窄煤柱冲击地压失稳的突变理论分析[J]. 水文地质与工程地质, 1995, 18(5): 17-20. (QIN Si-qing, HE Huai-feng. The study of rockburst on narrow coal pillar by the catastrophe theory[J]. Hydrogeology and Engineering Geology, 1995, 18(5): 17-20. (in Chinese))
[5]	杨治林, 余学义, 郭何明, 等. 浅埋煤层长壁开采顶板岩层灾害机理研究[J]. 岩土工程学报, 2007, 29(12): 1763-1766. (YANG Zhi-lin, YU Xue-yi, Guo He-ming, et al. Study on catastrophe mechanism for roof strata in shallow seam longwall mining[J]. Chinese Journal of Geotechnical Engineering, 2007, 29(12): 1763-1766. (in Chinese))
[6]	齐庆新, 窦林名. 冲击地压理论与技术[M]. 北京: 中国矿业大学出版社, 2008: 32-38. (QI Qing-xin, DOU Lin-ming. Theory and technology of rockburst[M]. Beijing: China University of Mining and Technology Press, 2008: 32-38. (in Chinese))
[7]	窦林名, 何江, 曹安业, 等. 动载诱发冲击机理及其控制对策探讨[C]// 中国煤炭学会成立五十周年高层学术论坛论文集. 北京, 2012: 294-299. (DOU Lin-ming, HE Jiang, CAO An-ye, et al. Mechanism and prevention methods discussion on coal mine rockburst induced by dynamic load[C]// Proceedings of the 50th Anniversary of the Founding of China Coal Society. Beijing, 2012: 294-299. (in Chinese))
[8]	潘一山, 吕祥锋, 李忠华, 等. 高速冲击载荷作用巷道动态破坏过程试验研究[J]. 岩土力学, 2011, 32(5): 1281-1286. (PAN Yi-shan, LÜ Xiang-feng, LI Zhong-hua, et al. Experimental study of dynamic failure process of roadway under high velocity impact loading[J]. Rock and Soil Mechanics, 2011, 32(5): 1281-1286. (in Chinese))
[9]	刘少虹. 动静加载下组合煤岩破坏失稳的突变模型和混沌机制[J]. 煤炭学报, 2014, 39(2): 292-300. (LIU Shao-hong. Nonlinear catastrophy model and chaotic dynamic mechanism of compound coal-rock unstable failure under coupled static dynamic loading[J]. Journal of China Coal Society, 2014, 39(2): 292-300. (in Chinese))
[10]	王家臣. 厚煤层开采理论与技术[M]. 北京: 冶金工业出版社, 2009: 186-190. (WANG Jia-chen. Theory and technology of thick seam mining[M]. Beijing: China Metallurgical Industry Press, 2009: 186-190. (in Chinese))
[11]	石平五, 侯忠杰. 神府浅埋煤层顶板破断运动规律[J]. 西安矿业学院学报, 1996, 16(3): 203-207. (SHI Ping-wu, HOU Zhong-jie. Law of roof breaking movement of shallow seams in Shenfu CMA of shallow seams in Shenfu CMA[J]. Journal of Xi'an Mining Institute, 1996, 16(3): 203-207. (in Chinese))
[12]	唐春安. 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 Xiao-he. A cusp catastrophic model of rock unstable failure[J]. Chinese Journal of Rock Mechanics and Engineering, 1990, 9(2): 100-107. (in Chinese))
[13]	陈忠辉, 唐春安, 傅宇方. 岩石失稳破裂的变形突跳研究[J]. 工程地质学报, 1997, 5(2): 143-149. (CHEN Zhong-hui, TANG Chun-an, FU Yu-fang. Study on sudden jump of deformation in unstable failure of rocks [J]. Journal of Engineering Geology, 1997, 5(2): 143-149. (in Chinese))
[14]	李夕兵. 岩石动力学基础与应用[M]. 北京: 科学出版社, 2014: 49-66. (LI Xi-bin. Rock dynamics fundamentals and application[M]. Beijing: Science Press, 2014: 49-66. (in Chinese))
[15]	李正杰. 浅埋煤层薄基岩综采面覆岩破断机理及与支架关系研究[D]. 北京: 煤炭科学研究总院, 2014: 23-37. (LI Zheng-jie. Research on the overlying strata breakage mechanism and the relationship between supports and surrounding strata in shallow-buried and thin bedrock working face[D]. Beijing: China Coal Research Institute CCRI, 2014: 23-37. (in Chinese))