岱庄煤矿4300采区3_上煤层上行开采研究

发布时间：2018-11-12 14:20

【摘要】：近距离煤层群开采通常采用下行顺序,即先开采上部煤层,间隔一定时间后,依次开采下部煤层;但是,在某些特定条件下,下行开采可能不能满足矿井的正常生产。采用上行开采能够很好地解决上述问题,可取得显著的技术经济效益,因此,对上行开采进行研究,具有重要的科学与工程意义。论文以淄博矿业集团岱庄煤矿4300采区为研究对象,通过现场调研、理论分析、软件评价以及数值计算等多种研究手段,对该区域近距离采空区上方煤层的安全开采可行性进行研究。分析了影响岱庄煤矿4300采区上行安全开采的各因素;采用“采动倍数影响法”、“三带判别法”、“开采时间间隔法”和“围岩平衡法”等方法对该区域上行开采的可行性进行初步判别,并结合研发的PCA法对4300采区上行安全开采的可行性进行综合评价;同时,实测了下煤层开采后的“三带”分布规律:3上煤层处于下方4328工作面采空区垮落带之上;并结合数值计算方法探讨了3下煤层开采后,上覆岩层的破坏特征。研究成果表明4328工作面上方的3上煤层上行开采是可行的。最后,数值计算研究了对采空区上方的工作面合理布置方式,通过对比分析采空区上方工作面回采巷道的矿压显现特征、回采工作面在回采过程中的矿压显现规律,并结合技术经济比较,提出采空区上方3上煤层工作面垂直于3下煤层工作面布置的技术方案。现场试验表明,采用上述设计方法,工作面矿压及巷道变形都在合理范围内,为岱庄矿类似条件下的上行开采问题的研究提供有益借鉴。
[Abstract]:In short distance coal seam group mining usually adopts the descending sequence, that is, mining the upper coal seam first, then mining the lower coal seam in turn after a certain time interval, but under some special conditions, the downlink mining may not meet the normal production of the mine. The uplink mining can solve the above problems well and can obtain remarkable technical and economic benefits. Therefore, it is of great scientific and engineering significance to study the uplink mining. This paper takes the 4300 mining area of Daizhuang Coal Mine of Zibo Mining Group as the research object, through field investigation, theoretical analysis, software evaluation and numerical calculation, and so on. The feasibility of safe mining of coal seams above close-distance goaf in this area is studied. The factors influencing the safety mining of No. 4300 mining area in Daizhuang Coal Mine are analyzed. The feasibility of uplink mining in this area is preliminarily judged by the methods of "influence of mining multiple", "three-zone discriminant method", "mining interval method" and "surrounding rock balance method". And combined with the research and development of the PCA method to 4300 mining area upstream safety mining feasibility comprehensive evaluation; At the same time, the distribution law of "three zones" after mining in the lower coal seam is measured: (3) the upper coal seam is located above the caving zone in the goaf of the lower 4328 working face, and the failure characteristics of the overlying strata after the mining of 3 coal seams are discussed in combination with the numerical calculation method. The research results show that the upward mining of No. 3 coal seam above 4328 face is feasible. Finally, the reasonable arrangement of the working face above the goaf is studied by numerical calculation. Through the comparative analysis of the characteristics of mine pressure behavior in the mining roadway above the goaf, the law of the rock pressure behavior in the mining face during the mining process is analyzed. Combined with the comparison of technology and economy, the technical scheme of vertical arrangement of 3 upper coal face to 3 lower coal face above goaf is put forward. The field test shows that the working face pressure and roadway deformation are within a reasonable range by using the above design method, which provides a useful reference for the study of the upward mining problem under similar conditions in Daizhuang Mine.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TD823.81

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