基于支架–围岩耦合原理的模拟试验液压支架及测控系统研制与应用

doi:10.13722/j.cnki.jrme.2017.1186

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摘要目前模拟试验中支架–围岩不能很好地满足强度、刚度和稳定性耦合关系，支架的多维受力特征也被忽略。为了保证试验结果的准确性和科学性，建立支架三维受力力学模型，考虑邻架挤压力和架尾推力对支架的影响，在满足支架结构稳定和受力环境与现场支架相似的基础上，借助高精度应力/位移传感器实时获取了模型支架工作参数，研制模拟试验液压支架及测控系统，测试成套系统的性能，结果表明：两柱掩护式模型支架阻力范围0.046～0.528 kN，可以通过调整液压系统油压输出端压力和立柱内径实现额定工作阻力的输出；支架增阻阶段刚度基本不变，且承载动压冲击的能力较强；支架临界下滑角在三向受力下比单向压缩时要小，抗滑能力下降，但架间挤压力与架尾推力在一定程度上又抑制了其倾倒的发生。将模型支架应用于绿水洞煤矿3132工作面开采试验中，支架的工作阻力为22.42 MPa，与实测结果误差在5%以内。对采空区进行探测，模型支架与现场支架在调整围岩结构和应力场方面效能一致。

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关键词 ：采矿工程, 大倾角煤层, 模型支架系统, 支架受力可视化, 支架参数校验

Abstract：At present，the support and surrounding rocks in the model test cannot meet the coupling relationships of stiffness，strength and stability，and the features of three-dimensional loads of support are also neglected. To ensure the accuracy of experimental results，a mechanical model of support under three-dimensional loadings was established，the effect of the squeezing force between the supports and the lateral force behind supports were considered. A two-prop shield hydraulic support was developed and the parameters of real-time performance were obtained with the high precision displacement/stress sensors. The properties of model support were tested. The results show that the model support has the resistance range of 0.046 to 0.528 kN，which can adjust the output pressure and the diameter of column to achieve the designated working resistance. The stiffness of model support in the resistance increasing phase is basically unchanged and is high enough to resist the dynamic impact. The critical slip angle of the support under triaxial forces is smaller than that of the uniaxial compression，but the squeezing force between supports and the lateral force behind supports are suppressed to a certain extent. Then the model supports was applied to the experiment of 3132 working face，Lvshuidong coal mine. The working resistance of model support is 22.42 MPa，the error is less than 5% compared to the measured values from the field. The drilling observation instrument was used to detect the goaf and the performance of model supports was found to be in line with the field shields in adjusting the surrounding rock structure and stress field.

Key words： mining engineering steeply dipping seam system of model support visualization of support force support parameters inspection

引用本文:

伍永平1，2，胡博胜1，2，解盘石1，2，王红伟1，2. 基于支架–围岩耦合原理的模拟试验液压支架及测控系统研制与应用[J]. 岩石力学与工程学报, 2018, 37(2): 374-382.
WU Yongping1，2，HU Bosheng1，2，XIE Panshi1，2，WANG Hongwei1，2. Development and application of support and control system for simulating test based on the coupling principle of support-surrounding rocks. , 2018, 37(2): 374-382.

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http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2017.1186 或 http://www.rockmech.org/CN/Y2018/V37/I2/374

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