两柱掩护式支架采场顶板灾害预警指标研究

发布时间：2018-07-12 15:34

本文选题：位态识别 + 综采　；参考：《采矿与安全工程学报》2017年01期

【摘要】：受高强度快速推进影响,采场支架外载处在一个剧烈的动态变化过程中,压架事故频发;基于压架事故特征和机理分析,研究了顶板合理作用点位置及大小与支架支撑能力的关系;然后基于四连杆结构运动规律并以掩护梁倾角、顶梁倾角为输入参量,结合支架固有结构参数研究得出活柱伸缩量、平衡千斤顶悬伸长度、顶梁掩护梁夹角等反映支架位态的关键指标;通过建立支架位态识别模型,根据位态的变化反演支架灾变前的荷载特征;据此特征,提出上述基于支架位态识别的3个压架预警指标(活柱伸缩量、顶梁和掩护梁倾角、合力作用点位置及大小),利用该预警指标对凯达矿等国内多个综采工作面支架荷载特征进行分析,验证了其合理性与科学性。
[Abstract]:Under the influence of high strength and fast propulsion, the stope support load is in a violent dynamic change process, and the pressure frame accidents occur frequently, based on the analysis of the characteristics and mechanism of the stope frame accidents, The relationship between the position and size of the reasonable working point of the roof and the support capacity of the support is studied, and then based on the motion law of the four-bar structure and the obliquity of the shield beam and the dip angle of the top beam as the input parameter, the telescopic quantity of the movable column is obtained by combining the inherent structural parameters of the support. The key indexes such as the length of suspension of the Jack and the angle between the cover beam of the top beam and so on reflect the position of the support, by establishing the identification model of the position and state of the support, the load characteristics before the catastrophic change of the support can be retrieved according to the change of the position, according to the characteristics, The above three pressure-frame warning indexes based on the recognition of support position are presented, such as the telescopic quantity of the movable column, the inclination angle of the top beam and the cover beam. The location and size of the working points) are used to analyze the load characteristics of supports in many domestic fully mechanized mining faces such as Kaida Coal Mine and so on. The rationality and scientificity of the support are verified.
【作者单位】：天地科技股份有限公司开采设计事业部;煤炭科学研究总院开采设计研究分院;中国矿业大学(北京)资源与安全工程学院;
【基金】：国家自然科学基金项目(51304115;51474128) 国家重点研发计划项目(2016YFC0600708)
【分类号】：TD355.4

【参考文献】