安顺煤矿顶板运动特征及控制技术研究

发布时间：2018-03-29 14:29

本文选题：山地煤层　切入点：赋存分类体系　出处：《贵州大学》2015年硕士论文

【摘要】：我国西南山区的特定地理位置和错综复杂的地形地貌,造就了地表多为起伏变化较大的山地。采场顶板由于受载不均匀、煤层埋深变化强烈,导致山地煤层开采时的矿压显现及顶板运动出现了新特征,对矿井安全高效开采造成了不利影响。本文以安顺煤矿典型采场9100工作面为基础研究对象,综合运用现场调研与实测、数值模拟与理论分析等研究手段,对山地赋存条件下的采场矿压显现规律及顶板运动特征进行了系统研究,主要研究成果如下:(1)基于大量实地调研与文献参考,建立了山地煤层赋存分类体系,为指导不同赋存条件下的采场矿压研究提供了工作基础。依据安顺煤矿9100工作面矿压现场实测结果和数值模拟结果,对采场矿压显现、顶板运动特征、坡体活动与开采沉陷特征进行了研究,得出了顶板破断过程的四个阶段。(2)通过建立多组数值模型,分析了顶板运动的影响因素及影响规律,辨证研究了煤层厚度、煤层埋深、坡体角度与覆岩运动结构的关系,得出煤层厚度、煤层埋深是影响顶板运动结构形成与转变方式的主要因素。(3)运用矿压基础研究理论与力学理论,分析了顶板受力类型、基本顶初次断裂受力状态,推导出了基本顶初次断裂步距。根据结构力学与材料力学,建立了基本顶初次来压和周期来压的结构力学模型,并进行了结构受力分析。(4)根据现有研究成果,按“给定变形”与“限定变形”方案分析了支架与围岩的相互作用关系。采用不同支护强度计算方案,得出了合理有效的支护工作阻力。
[Abstract]:The special geographical location and complicated terrain and landform in the mountainous area of southwest China have made the surface of the earth's surface more undulating and changed greatly. The roof of the stope has a strong change in the depth of the coal seam because of the uneven loading of the roof. As a result of the new characteristics of mine pressure and roof movement during mining in mountainous coal seam, this paper takes 9100 face of typical stope of Anshun Coal Mine as the basic research object, which has a negative effect on mine safe and efficient mining. By means of field investigation and measurement, numerical simulation and theoretical analysis, this paper makes a systematic study on the characteristics of stope pressure and roof movement under the condition of mountain occurrence. The main research results are as follows: (1) based on a large number of field investigations and literature references, a classification system for the occurrence of coal seams in mountainous areas has been established. In order to guide the study of stope pressure under different existing conditions, this paper provides the working basis for the study of stope pressure. According to the measured results and numerical simulation results of mine pressure in 9100 face of Anshun Coal Mine, the characteristics of stope pressure and roof movement are analyzed. The characteristics of slope movement and mining subsidence are studied, and the four stages of roof breaking are obtained. Through the establishment of multi-group numerical models, the influencing factors and law of roof movement are analyzed, and the thickness of coal seam and the depth of coal seam are dialectically studied. Based on the relationship between slope angle and overburden movement structure, it is concluded that the thickness of coal seam and the depth of coal seam are the main factors influencing the formation and transformation of roof motion structure. According to the structural mechanics and material mechanics, the structural mechanics models of the primary pressure and the periodic pressure of the basic top are established according to the stress state of the primary fracture of the basic top, and the distance of the first fracture of the basic top is deduced. According to the existing research results, according to the "given deformation" and "limited deformation" scheme, the interaction relationship between support and surrounding rock is analyzed. Different support strength calculation schemes are adopted. The reasonable and effective support resistance is obtained.
【学位授予单位】：贵州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD325

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