两柱掩护式液压支架空间承载特性研究
Spatial Bearing Feature of Yield-type Support with Two Pillars
作者：侯运炳(中国矿业大学(北京) 资源与安全工程学院, 北京 100083)；何尚森(中国矿业大学(北京) 资源与安全工程学院, 北京 100083)；谢生荣(中国矿业大学(北京) 资源与安全工程学院, 北京 100083)；周殿奇(中国矿业大学(北京) 资源与安全工程学院, 北京 100083)；周玉(中国矿业大学(北京) 资源与安全工程学院, 北京 100083)；王果(紫金矿业集团股份有限公司, 福建 龙岩 364200)
Author：HOU Yunbing(School of Resource and Safety Eng., China Univ. of Mining and Technol. (Beijing), Beijing 100083, China)；HE Shangsen(School of Resource and Safety Eng., China Univ. of Mining and Technol. (Beijing), Beijing 100083, China)；XIE Shengrong(School of Resource and Safety Eng., China Univ. of Mining and Technol. (Beijing), Beijing 100083, China)；ZHOU Dianqi(School of Resource and Safety Eng., China Univ. of Mining and Technol. (Beijing), Beijing 100083, China)；ZHOU Yu(School of Resource and Safety Eng., China Univ. of Mining and Technol. (Beijing), Beijing 100083, China)；WANG Guo(Zijin Mining Group Co. Ltd., Longyan 364200, China)
收稿日期：2016-06-06 年卷（期）页码：2017,49(3):85-95
期刊名称：工程科学与技术
Journal Name：Advanced Engineering Sciences
关键字：两柱掩护式液压支架;空间承载特性;承载体;纵、横两向承载区;量化分析
Key words：yield-type support with two pillars;spatial bearing feature;bearing body;bearing areas along length and width direction;quantitative analysis
基金项目：国家自然科学基金资助项目（51234005）；中央高校基本科研业务费项目资助（2011YZ02）
中文摘要
针对两柱掩护式支架基于平面力系的承载区适应性单一，难以反映顶梁纵向对称面以外区域承载特性的问题，提出采用“承载体”分析支架的承载特性。运用空间力学解析法，以顶梁为研究对象推导“承载体”外表曲面解析式并分析承载面重叠时的选取原则；对“承载体”进行纵向和横向切面，得到支架纵、横两向承载特性；分析承载体的体积与支架参数之间的关系，并与已有的计算结果进行对比。结果表明：承载面的选取应遵循各液压构件承载力最小值的原则，并要满足立柱承载力在顶梁承载范围内为正值；“承载体”随支架高度而变化，并与支架高度存在一一对应关系；纵向承载区的2个极值点及面积都在支架纵向对称面处取得最大值并向两侧立柱双向衰减，横向承载区按照分布特征可分为3种类型；增大立柱上铰点到顶梁末端距离、立柱间距、平衡千斤顶的工作阻力及与水平夹角均能增大承载体的体积；“承载体”纵向对称面处的承载区分布特征以及支架参数对承载能力的影响都与已有计算结果吻合，因此“承载体”能够反映支架顶梁任意区域的承载特性，“承载体”的体积可以作为支架参数优化的标准。
英文摘要
The bearing area of yield-type support with two pillars which was obtained based on the plane simplified force system had poor adaptability and could hardly reflected the characteristics of bearing capacity in the top beams except the area where the symmetry plane was located.In order to solve the problems,the "bearing body" was adopted to analysis the characteristics of bearing capacity.Firstly,the outside surface formulas of the "bearing body" were deduced by space force system analytical method with the top beam as the study object and the selecting principles were also analyzed when the bearing faces were overlapped.Then the longitudinal and transverse sections of the "bearing body" reflecting the characteristics of bearing capacity in the corresponding areas were obtained.At last the relationships between the volume of the "bearing body" and the parameters of the support were analyzed.Besides,the above results were contrasted with the existing calculation results.The results showed that,when being selected,the overlapped bearing faces should follow the principle that the support force value of every hydraulic component must be minimum,meanwhile,the support force of pillars must be positive value;the "bearing body" varied with the support height and had a one-to-one correspondence with the support height;both the area and the two extreme points of the longitudinal bearing areas were maximum in the symmetry plane and decreased to the direction of both sides' pillars;the transverse bearing areas could be classified three types based on their distribution characteristics;the volume of "bearing body" could be increased according to increase the distance between the pillars' upper hinge point and the top beam's bottom,the distance between pillars,balance jack's working resistance and its horizontal angle;the characteristics of bearing area in the support's symmetry plane and the influences of support parameters on bearing capacity of support were identical with the existing calculation results.So the "bearing body" could reflect the characteristics of bearing capacity in any area of the top beam and the volume of "bearing body" could be the standard of support parameter optimization.
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