两柱掩护式液压支架内外加载支护对比试验研究

Title

Experimental study on supporting status of internal and external loading of two-legs shielded hydraulic support
作者

张德生任怀伟何明卞冀李提建马强
Author

ZHANG Desheng，REN Huaiwei，HE Ming，BIAN Ji，LI Tijian，MA Qiang
单位

天地科技股份有限公司开采设计事业部中国煤炭科工集团唐山研究院有限公司煤炭科学技术研究院有限公司
Organization

1.Coal Mining & Designing Department，Tiandi Science & Technology Co.，Ltd.，Beijing ，China；China Coal Technology & Engineering Group Tangshan Research Institute Co.,Ltd.，Tangshan 063012，China；2.China Coal Research Institute，Beijing ，China
摘要

为解决内加载无法反映液压支架真实工况，智能开采支护状态调控缺乏试验依据的问题，研制了ZY6400/17/31液压支架1∶2缩比模型，搭建了液压支架位移、压力等状态监测系统，分别采用内、外2种加载方式，按照GB 25974.1—2010对不同垫块接触条件下液压支架进行试验。试验结果表明：内加载与外加载合力作用点位置易产生偏移，液压支架响应差异明显，前者作用下表现出压力协同，后者作用下位移协同；平衡千斤顶在非调控外加载状态下，随加载次数将产生累积效应，导致压力不断增大，有失稳趋势；接触状态对立柱位移影响较大，因此井下现场必须对姿态予以测量，提供顶、底板围岩接触状态判断依据。
Abstract

In order to solve the problem that the internal loading can not reflect the real working condition of the hydraulic support and the lack of test basis for the intelligent mining support state regulation,a 1∶2 scaling model of ZY6400/17/31 was developed, and the monitoring system for displacement and pressure were established. The system adopts internal and external loading modes respectively, and tests the hydraulic supports under different contact conditions of the blocks according to GB 25974.1-2010.The results shows that the point of resultant force of the internal loading and the external loading force is easy to offset and the response of the hydraulic support is obvious. The former shows the pressure synergy and the latter acts the displacement synergy; the balance jack is under the unregulated external loading state. The number of loading will have a cumulative effect, resulting in increasing pressure and instability tendency. The contact state has a great influence on the displacement of the column. Therefore, the posture must be measured at the underground site to provide a basis for judging the contact state of the surrounding rock between the top and bottom plates.
关键词

两柱掩护式支架加载方式支护状态对比试验
KeyWords

two legs shield-type powered support; loading methods; supporting state; comparison test
基金项目(Foundation)

天地科技创新创业资金资助项目（2018-TD-ZD008）；国家自然科学基金资助项目（U1610251）；中国煤炭科工集团创新资助项目（2017MS005）;国家重点基础研究发展计划(973计划)资助项目（2014CB046302）
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