开滦荆各庄矿广场煤柱充填开采技术研究

发布时间：2018-02-10 02:18

本文关键词： 广场煤柱条带充填开采膏体充填工艺地表变形分析　出处：《华北理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：开滦荆各庄矿经过三十余年高强度开采,除了工业广场煤柱外煤炭资源几近枯竭。按照规划停产后的矿井将作为矿业系统相关专业学习和参观教育的基地,所以,一方面工业广场区域主要井巷设施和主要建筑物必须得到长期有效的保护,以满足今后正常使用;另一方面工业广场2400万吨保护煤柱也要经济安全回收。因此,基于荆各庄矿井煤层赋存、开采技术条件以及建构筑物的保护要求,优化设计既能保证建筑物的安全使用,又能提高煤炭的开采率,对实现开滦荆各庄矿井转型有重要意义。论文研究以荆各庄矿工业广场煤柱为背景,通过理论分析、现场调研、数值模拟以及实验相结合的研究方法,通过对工业广场的地质条件开采技术条件以及原有区域开采地表观测站获得的数据统计分析,结合工业广场建构筑物保护要求,对工业广场的外围煤柱进行全采设计;对内部煤柱进行了开采设计,设计出四个符合现场的开采方案,对方案的安全性和稳定性进行分析,确定荆各庄工业广场煤柱煤层群的开采采用9煤和12-2煤充填条带开采技术;同时,对煤柱条带充填开采变形预计分析,即采用概率积分法对地表及井筒进行分析,工广区域的地表变形的计算结果均在要求的范围内,对方案四煤柱开采用FLAC软件数值模拟,从水平位移、垂向位移、水平应力以及垂向应力这几个方面进行分析,得出的结果和概率积分法相一致,符合安全要求;对采空区进行膏体充填工艺设计,包括从地表面到井底采空区的整个系统过程的总工艺流程,并对这个过程中的各个充填子系统进行了符合实际的设计,对膏体充填原材料进行配比研究,即煤矸石、粉煤灰、水泥、水以及添加剂,经过充填环管实验确定其参数比例,并对搅拌成的膏体进行可靠性能分析,其结果符合要求,并且通过对充填后的地表进行预测。
[Abstract]:After more than 30 years of high-intensity mining in Jinggezhuang Mine in Kailuan, the coal resources in addition to the coal pillar in the Industrial Plaza are nearly exhausted. The mine after the planned shutdown will be used as a base for studying and visiting the relevant majors of the mining system, so, On the one hand, the main shaft and roadway facilities and main buildings in the industrial square area must be protected for a long time in order to meet the normal use in the future; on the other hand, 24 million tons of protected coal pillars in the industrial square must also be recovered economically and safely. Based on the occurrence of coal seam in Jinggezhuang mine, mining technical conditions and the protection requirements of building structures, the optimized design can not only guarantee the safe use of buildings, but also improve the mining rate of coal. It is of great significance to realize the transformation of Jinggezhuang mine in Kailuan. Based on the coal pillar of Jinggezhuang mine industrial square, the research method of combining theoretical analysis, field investigation, numerical simulation and experiment is studied in this paper. Based on the technical conditions of mining geological conditions of industrial square and the statistical analysis of the data obtained from the original regional mining observation station, combined with the requirements of building structure protection of industrial square, the whole mining design of the coal pillar around the industrial square is carried out. The mining design of inner coal pillar is carried out, four mining schemes which accord with the field are designed, the safety and stability of the scheme are analyzed, and the mining technology of 9 coal and 12-2 coal filling strip is determined for the mining of coal pillar coal seam group in Jinggezhuang Industrial Plaza. At the same time, the prediction and analysis of mining deformation of coal pillar strip filling, that is to say, the probability integration method is used to analyze the surface and wellbore, and the calculation results of surface deformation in Gongguang area are all within the required range. The fourth coal pillar was numerically simulated by FLAC software, and analyzed from the aspects of horizontal displacement, vertical displacement, horizontal stress and vertical stress. The results are consistent with the probability integration method and accord with the safety requirements. The paste filling process design for goaf is carried out, including the total process flow of the whole system process from the ground surface to the bottom goaf, and the practical design of each filling subsystem in this process is carried out. The proportioning of paste filling raw materials, that is, coal gangue, fly ash, cement, water and additives, was studied. The ratio of parameters was determined by the experiment of filling loop pipe, and the reliable performance of the paste was analyzed, and the results met the requirements. And through the prediction of the filling surface.
【学位授予单位】：华北理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD823.7

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