欣源矿综采工作面过走向空巷充填技术研究

发布时间：2018-04-17 20:40

本文选题：走向空巷 + 综采工作面　；参考：《中国矿业大学》2017年硕士论文

【摘要】：本文以欣源矿30101综采工作面过走向空巷为工程背景,采用理论分析、力学推导、数值模拟和现场实测相结合的综合研究方法,研究了综采工作面遇走向空巷采用充填的可行性,并在30101工作面通过3205回风巷空巷时采用高水材料充填空巷,达到了预期的效果。主要研究成果如下:(1)分析了空巷围岩的应力分布规律,得到了走向空巷跨度是影响空巷稳定的主要因素。对于跨度较大的空巷,需要减小空巷的等效跨度;分析得到工作面过空巷的四种破坏类型:漏垮破坏、离层破坏、剪切破坏、变形破坏;(2)采用高水材料充填过空巷,充填体与破碎围岩形成胶结整体结构,充填体支护阻力与煤体共同支撑顶板,为安全过空巷提供了技术途径;(3)若巷道顶板未离层,在超前支承应力作用阶段,充填体对顶板提供支撑作用,确保工作面过空巷时顶板不发生离层;若巷道已经离层破坏,充填体充满整个巷道空间,阻止顶板发生进一步破坏与垮落;(4)研究得到充填体强度与巷道围岩变形的关系,确定了合理的充填体强度为1MPa,并确定高水材料的水灰比为8:1;(5)在欣源矿30101工作面进行工业性试验,高水材料充填体有效支撑顶板,保证了工作面正常回采,表明空巷充填取得了成功。
[Abstract]:In this paper, based on the engineering background of 30101 fully-mechanized face of Xinyuan Coal Mine, the feasibility of filling in the face of goaf is studied by using a comprehensive research method, which combines theoretical analysis, mechanical derivation, numerical simulation and field measurement.The high water material is used to fill the empty roadway when the 30101 face passes through the 3205 return air roadway, and the expected effect is achieved.The main research results are as follows: (1) the stress distribution law of the surrounding rock of the goaf is analyzed, and the main factor affecting the stability of the goaf is the span of the goaf.For the large-span goaf, it is necessary to reduce the equivalent span of the empty roadway, and four kinds of failure types are obtained from the analysis: leakage failure, detachment failure, shear failure, deformation failure, etc.) overgoaf roadway is filled with high water material.A cemented whole structure is formed between the filling body and the broken surrounding rock, and the supporting resistance of the filling body and the coal body support the roof together, which provides a technical way to pass through the goaf safely. (3) if the roof of the roadway is not detached from the stratum, it is in the stage of leading supporting stress action.The filling body provides support to the roof to ensure that the roof does not break off when the face passes through the empty roadway; if the roadway has been destroyed, the filling body fills the whole roadway space,The relationship between backfill strength and surrounding rock deformation of roadway is obtained, and the reasonable backfill strength is determined to be 1MPa, and the water-cement ratio of high water material is determined to be 8: 1 / 5) the industrial test is carried out at 30101 face of Xinyuan Coal Mine.The high water material filling body effectively supports the roof, which ensures the normal mining of the face, which indicates that the filling of the empty roadway has been successful.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD353

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