四柱放顶煤液压支架立柱受力不均衡规律和机理研究.pdf

学兔兔 第17卷 第6期 (总第109期) 煤 矿 开 采 Vo1．17No．6(Series No．109) 2012年l2月 Coal mining Technology December 2012 四柱放顶煤液压支架立柱受力不均衡规律及机理研究 何风强 ，李 宏 ，王东攀。 (i．神华宁煤集团石炭井焦煤公司，宁夏石嘴山753000；2．天地科技股份有限公司开采设计事业部，北京100013) [摘 要] 为研究四柱综放支架立柱受力不均衡性规律，对有关综放工作面矿压资料进行整理 分析，分别按顶煤软硬和放煤前后研究四柱综放支架的立柱受力不均衡变化规律，并与两柱放顶煤液 压支架立柱受力特性进行对比。结果表明：前后柱受力不均衡系数主要取决于顶煤软硬程度，同时受 放煤量和煤层倾角的影响；两柱放顶煤支架立柱受力相对均衡，支撑效率高于四柱放顶煤支架。 [关键词] 四柱放顶煤液压支架；两柱放顶煤液压支架；立柱；受力；机理 [中图分类号]TD355．41 [文献标识码]A [文章编号]1006—6225(2012)06-0035—03 Research on Unbalanced Force Rule and Mechanism of 4-prop Caving Powered Support HE Feng—qiang ，LI Hong ，WANG Dong—pan (1．Shitanjing Coke Corporation，Shenhua Ningmei Group，Shizuishan 753000 China； 2．Coal Mining＆Designing Depar merit，Tiandi Science＆Technology Co．，Ltd，Beijing 100013，China) Abstract：In order to obtain unbalanced force rule of 4-prop caving powered suppo~，this paper researched stress variation of 4--prep caving powered support under hard and soft top—coal after and before top—coal caving，and compared that of 2-prop caving powered sup— port．Results showed that unbalanced force coefficient of front and back props was mainly dependent on top·coal hardness and influenced by top—coal volume and coal—seam dip．Prop stress of 2-prop support was more balanced than that of 4-prop support，SO supporting effi· ciency war higher． Keywords：4-prop caving powered support；2-prop caving powered support；prop；stress；mechanism 综采放顶煤技术自1982年引进至国内，经过 效率低等问题，造成支架在大倾角、松软煤层等地 30a的不断发展和完善，已成为我国厚煤层开采的 质条件下工况差，因此有必要对立柱受力不均衡的 主要方法之一。综放支架作为综放开采技术的核心 规律和机理进行分析，并提出改进措施。