两柱掩护式液压支架空间承载特性研究
发布时间：2018-10-10 13:39
【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。
[Abstract]:In view of the fact that the bearing zone of two-column shield support is single based on the plane force system, it is difficult to reflect the bearing characteristics outside the longitudinal symmetrical plane of the top beam, so the "bearing body" is proposed to analyze the bearing characteristics of the support. Taking the top beam as the object of study, the analytic formula of the surface of the "bearing body" is derived by using the spatial mechanics analytical method, and the selection principle of the overlapping bearing surface is analyzed, and the longitudinal and transverse bearing characteristics of the support are obtained by using the longitudinal and transverse cutting plane of the "bearing body". The relationship between the volume of the bearing body and the parameters of the support is analyzed and compared with the existing calculation results. The results show that the selection of bearing surface should follow the principle of minimum bearing capacity of each hydraulic member, and should satisfy that the bearing capacity of column should be positive in the bearing range of top beam, and the bearing body varies with the height of support. There is a one-to-one correspondence with the height of the support, the maximum value and area of the longitudinal bearing area are obtained at the longitudinal symmetrical plane of the support and the vertical column attenuates bidirectionally to both sides, and the lateral bearing area can be divided into three types according to the distribution characteristics. Increasing the distance between the upper hinge point of the column and the end of the top beam, and the distance between the columns, Both the working resistance and the angle between the balanced Jack and the horizontal Jack can increase the volume of the bearing body, and the distribution characteristics of the bearing area at the longitudinal symmetrical plane of the "bearing body" and the influence of the support parameters on the bearing capacity are in agreement with the existing calculation results. Therefore, the "bearing body" can reflect the bearing characteristics of any region of the support top beam, and the volume of the "bearing body" can be used as the standard for the optimization of the support parameters.
【作者单位】： 中国矿业大学(北京)资源与安全工程学院;紫金矿业集团股份有限公司;
【基金】：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)
【分类号】：TD355.4
本文编号：2261990
[Abstract]:In view of the fact that the bearing zone of two-column shield support is single based on the plane force system, it is difficult to reflect the bearing characteristics outside the longitudinal symmetrical plane of the top beam, so the "bearing body" is proposed to analyze the bearing characteristics of the support. Taking the top beam as the object of study, the analytic formula of the surface of the "bearing body" is derived by using the spatial mechanics analytical method, and the selection principle of the overlapping bearing surface is analyzed, and the longitudinal and transverse bearing characteristics of the support are obtained by using the longitudinal and transverse cutting plane of the "bearing body". The relationship between the volume of the bearing body and the parameters of the support is analyzed and compared with the existing calculation results. The results show that the selection of bearing surface should follow the principle of minimum bearing capacity of each hydraulic member, and should satisfy that the bearing capacity of column should be positive in the bearing range of top beam, and the bearing body varies with the height of support. There is a one-to-one correspondence with the height of the support, the maximum value and area of the longitudinal bearing area are obtained at the longitudinal symmetrical plane of the support and the vertical column attenuates bidirectionally to both sides, and the lateral bearing area can be divided into three types according to the distribution characteristics. Increasing the distance between the upper hinge point of the column and the end of the top beam, and the distance between the columns, Both the working resistance and the angle between the balanced Jack and the horizontal Jack can increase the volume of the bearing body, and the distribution characteristics of the bearing area at the longitudinal symmetrical plane of the "bearing body" and the influence of the support parameters on the bearing capacity are in agreement with the existing calculation results. Therefore, the "bearing body" can reflect the bearing characteristics of any region of the support top beam, and the volume of the "bearing body" can be used as the standard for the optimization of the support parameters.
【作者单位】： 中国矿业大学(北京)资源与安全工程学院;紫金矿业集团股份有限公司;
【基金】：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)
【分类号】：TD355.4
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1 武丽萍;张锁江;刘金生;;保持顶板完整对支架水平承载特性要求的探讨[J];煤炭科学技术;1997年01期
2 ;[J];;年期
，本文编号：2261990
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