浅埋综放L工作面开采方法及其矿压实测研究

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (2483 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Based on the conditions of #16 coal seam of Lutian coal mine，a new mining method adopting the roadway layout with L-shape is proposed and carried out successfully. The caving characteristics of the top coal and roof，the working resistances of the powered support，the subsidence and collapse rules of the ground surface，the backfill and the roller compaction technology and the other aspects of the fully-mechanized top coal caving for the shallow-buried thick coal seam are studied by field observation. The evolution of the roof rupture and collapse is analyzed. The mechanical model of arch and step voussoir beam combination is established. The movement law of overlying strata and the crushing mechanism of the top coal are revealed；and the powered support resistance formula for controlling roof stability is put forward. The study results show as follows：(1) The mining method of L-shaped working face is a kind of method with high efficiency，safety and high recovery；it is a meaningful reference to outcrop mining or transition from open-pit to underground mining. (2) It is feasible in technology to use fully-mechanized sublevel caving mining for the shallow-buried thick coal seam under the appropriate mining conditions. (3) The periodic weighting step distance increases with the increasing thickness of overlying strata. (4) The periodic weighting is obvious in the middle of working face. (5) The subsidence and collapse of the ground surface can be divided into 4 stages；the backfills and the roller compaction should be divided into 2 stages. (6) In order to enhance the stabilities of the roof and the coal wall，it is essential to increase the initial supporting force of powered support. The results can be referred for further studies in similar conditions.

Key words： mining engineering shallow-buried thick coal seam roadway layout with L-shape mining method fully-mechanized sublevel caving mining underground pressure characteristics

Received: 19 July 2010

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors

Cite this article:

URL:

https://rockmech.whrsm.ac.cn/EN/Y2011/V30/I2/244

[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 Qingxiang. 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] 黄庆享. 采场老顶初次来压的结构分析[J]. 岩石力学与工程学报，1998，17(5)：521–526.(HUANG Qingxiang. Structural analysis of main roof stability during first weighting in longwall face[J]. Chinese Journal of Rock Mechanics and Engineering，1998，17(5)：521–526. (in Chinese)) [3] 黄庆享，钱鸣高，石平五. 浅埋煤层采场老顶周期来压的结构分析[J]. 煤炭学报，1999，24(6)：581–585.(HUANG Qingxiang，QIAN Minggao，SHI Pingwu. Structural analysis of main roof stability during periodic weighting in longwall face[J]. Journal of China Coal Society，1999，24(6)：581–585.(in Chinese)) [4] 余学义，黄森林. 浅埋煤层覆岩切落裂缝破坏及控制方法分析[J]. 煤田地质与勘探，2006，34(6)：18–21.(YU Xueyi，HUANG Senlin. Analyzing falling crack failure of overburden strata of shallow coal seam and its control method[J]. Coal Geology and Exploration，2006，34(6)：18–21.(in Chinese)) [5] 侯忠杰. 浅埋煤层关键层研究[J]. 煤炭学报，1999，24(4)：359–363.(HOU Zhongjie. Study on key stratum in shallow seam[J]. Journal of China Coal Society，1999，24(4)：359–363.(in Chinese)) [6] 侯忠杰. 地表厚松散层浅埋煤层组合关键层的稳定性分析[J]. 煤炭学报，2000，25(2)：127–131.(HOU Zhongjie. Analysis of combinatorial key strata stability in shallow coal seam with thick loose bed[J]. Journal of China Coal Society，2000，25(2)：127–131.(in Chinese)) [7] 方新秋，郝宪杰，兰奕文. 坚硬薄基岩浅埋煤层合理强制放顶距的确定[J]. 岩石力学与工程学报，2010，29(2)：1 174–1 177.(FANG Xinqiu，HAO Xianjie，LAN Yiwen. Determination of reasonable forced caving interval in shallow-buried seam with hard and thin bedrock[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(2)：1 174–1 177.(in Chinese)) [8] 王金安，赵志宏，侯志鹰. 浅埋坚硬覆岩下开采地表塌陷机制研究[J]. 煤炭学报，2007，32(10)：1 051–1 056.(WANG Jin′an，ZHAO Zhihong，HOU Zhiying. Study on the catastrophic collapse of surface land induced by mining under a shallow and hard strata[J]. Journal of China Coal Society，2007，32(10)：1 051–1 056.(in Chinese)) [9] 李新元，陈培华. 浅埋深极松软顶板采场矿压显现规律研究[J]. 岩石力学与工程学报，2004，23(19)：3 305–3 309.(LI Xinyuan，CHEN Peihua. Study on regularity of structural behaviors around coal face under the shallow-buried loose roof[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(19)：3 305–3 309.(in Chinese)) [10] 宋选民，顾铁凤，闫志海. 浅埋煤层大采高工作面长度增加对矿压显现的影响规律研究[J]. 岩石力学与工程学报，2007，26(增2)：4 007–4 012.(SONG Xuanmin，GU Tiefeng，YAN Zhihai. Effects of increasing working face?s length on underground pressure behaviors of mining super-high faces under shallow coal seam[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(Supp.2)：4 007–4 012. (in Chinese)) [11] 靳钟铭. 放顶煤开采理论与技术[M]. 北京：煤炭工业出版社，2001. (JIN Zhongming. Theory and technology of top coal caving mining[M]. Beijing：China Coal Industry Publishing House，2001.(in Chinese)) [12] 张顶立. 特厚坚硬煤层分层综放开采关键技术研究[J]. 岩石力学与工程学报，2002，21(2)：273–279.(ZHANG Dingli. Study on key technology of fully-mechanized sub-level caving mining for special thick and hard coal seam[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(2)：273–279.(in Chinese)) [13] 王志强，周澎，完颜晓亮. 倾斜特厚易燃煤层多分层综放面发火机制及综合防治[J]. 煤矿开采，2004，19(2)：62–65.(WANG Zhiqiang，ZHOU Peng，WANYAN Xiaoliang. Ignition mechanism and its prevention for longwall with top-caving mining face in multi-layer of inflammable inclined coal face with extra-height[J]. Coal Mine Technology，2004，19(2)：62–65.(in Chinese)) [14] SUN S G. Theoretical study of the slope stability in open pit influence by underground mining[C]// Proceeding of International Symposium on New Development in Rock Mechanics and Engineering. Shenyang：Northeastern University Press，1994：699–703. [15] SUN S G. A study of the theory and method for predicting and calculating the ground deformation due to combined effect of underground and open pit mining operation[C]// Rock Mechanics and Geotechnical Engineering. Beijing：China Coal Industry Publishing House，1995：469–472. [16] ADHIKARY D P，DYSKIN A V，JEWELL R J，et al. A study of the mechanism of flexural topping failure of rock slopes[J]. Rock Mechanics and Rock Engineering，1997，30(2)：122–128. [17] BELLO A. Parameter optimization of influence function in Mining subsidence[J]. International Journal of Rock Mechanics and Mining Sciences，1997，34(7)：553–567. [18] KRISHNAMURTHI C. Dealing with surface coal fires—a case study[J]. Coal International Redhill，1987，6(3)：16，18–20. [19] COLAIZZI G J. Prevention，control and extinguishment of coal seam fires using cellular grout[J]. International Journal of Coal Geology，2004，59(1)：75–81. [20] 钱鸣高，石平五. 矿山压力与岩层控制[M]. 徐州：中国矿业大学出版社，2003.(QIAN Minggao，SHI Pingwu. Ground pressure and strata control[M]. Xuzhou：China University of Mining and Technology Press，2003.(in Chinese))