近距离薄煤层群联合开采回采巷道布置研究

发布时间：2018-07-14 16:14

【摘要】：长久以来,我国拥有的丰富煤炭资源一直占据着一次性能源消耗的主体地位,随着采煤效率及其产量的不断提高,诸如露天煤层或浅埋深煤层等具有良好开采条件的煤炭资源已经被大量开采,而煤炭在未来几十年中仍将作为主要能源存在,这就使得薄煤层的开采逐步受到人们的重视。就目前对薄煤层开采的研究现状来看,绝大部分都集中在工作面方面,对薄煤层联合开采巷道布置的研究相对少见,且关键在于远不如对工作面所做的研究那样系统全面。基于以上情况,本论文以潞安集团漳村矿为工程背景,运用理论研究、相似模拟和数值模拟等方法进行研究,再辅以工程实践给予实例验证,全面分析近距离薄煤层群联合开采的巷道布置。研究成果主要为以下几点:(1)利用现有薄煤层联合开采巷道布置的力学模型,归纳论证已有巷道内错式和外错式公式,并结合漳村矿实际情况给出理论错距:外错距7m,内错距4.7m;(2)利用大比例(1:20)物理相似模拟实验对层间距2m和4m时不同巷道布置方式情况下各种错距布置进行模拟观察分析,得出层间距2m时合理外错距大于10m,内错距大于6m;层间距4m时合理外错距大于8m,内错距大于5m;以及重叠式巷道布置时的稳定情况;(3)采用UDEC数值模拟软件对层间距2m、4m、6m和8m时不同巷道布置方式情况下各种巷道错距布置进行模拟分析,得出各层间距下不同布置方式的合理错距,并就层间距对回采巷道布置的影响进行了分析总结。论文最后就本文分析得出的结论,引用相应的工程实例进一步分析验证,全面系统的对漳村矿近距离薄煤层群联合开采回采巷道布置进行了分析研究和论证,为今后具备相似地质条件的矿井实际生产提供了一定的参考和借鉴。
[Abstract]:For a long time, the abundant coal resources in our country have been occupying the main position of one-time energy consumption, along with the continuous improvement of coal mining efficiency and output. Coal resources with good mining conditions, such as open-pit coal seam or shallow buried deep coal seam, have been exploited in large quantities, but coal will still exist as the main energy in the coming decades, which makes people pay more and more attention to the exploitation of thin coal seam. According to the present research situation of thin coal seam mining, most of them are concentrated in the working face, and the research on the roadway layout of the thin coal seam combined mining is relatively rare, and the key is that it is far less systematic and comprehensive than the research on the working face. Based on the above situation, this paper takes Zhangcun Mine of Lu'an Group as the engineering background, uses the methods of theoretical research, similarity simulation and numerical simulation, and then gives an example to verify it with engineering practice. The roadway layout of combined mining of short distance thin coal seam group is analyzed in an all-round way. The main research results are as follows: (1) based on the existing mechanical model of roadway layout in thin coal seam combined mining, the existing formulas of inner and outer dislocations in roadways are summarized and demonstrated. Combined with the actual situation of Zhangcun Mine, the theoretical error distance is given: the outer fault distance is 7 m, the inner fault distance is 4.7 m, (2) by using the physical similarity simulation experiment of large scale (1:20), all kinds of staggered spacing arrangements under different roadway layout modes with 2 m and 4 m interval are observed and analyzed. The results show that the reasonable outer fault distance is more than 10m and the inner dislocation distance is more than 6m when the interval is 2m; the reasonable outer dislocation distance is more than 8m and the inner fault distance is more than 5m when the interval is 4m; and the stability of the superimposed roadway arrangement is obtained. (3) using the UDEC numerical simulation software to simulate the interval between the layers of 2mand 4mm-6m. At 8 m and 8 m, the dislocations of different roadways are simulated and analyzed. The reasonable staggered distance of different arrangement modes under each layer spacing is obtained, and the influence of layer spacing on the layout of mining roadway is analyzed and summarized. At the end of the paper, the conclusion of this paper is analyzed and verified by citing the corresponding engineering examples, and the layout of mining roadway in Zhangcun coal mine is analyzed and demonstrated systematically. It provides a certain reference and reference for the actual production of mines with similar geological conditions in the future.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TD823.81

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