超前液压支架群组–锚固耦合支护力学特性研究及实验验证

doi:10.13722/j.cnki.jrme.2020.1142

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摘要为了研究超前液压支架群组与锚杆(索)耦合支护围岩的力学特性，采用中厚板理论对围岩力学特性进行描述，结合能量泛函对等效支架群组支撑力和锚杆(索)作用进行描述，建立超前液压支架群组–锚固耦合支护围岩力学模型，引入罚函数对模型边界条件进行约束，基于Hamilton原理变分获得系统控制方程。依据山西阳泉集团平舒公司温家庄煤矿15106工作面回采巷道超前支护参数，运用Ritz法对模型求解，获得锚固支护、等强支护、非等强支护三种策略下顶板变形量、弯矩、应力分布情况。通过对比3种支护策略下支护效果表明：超前液压支架群组耦合支护下顶板最大位移相对比锚固支护降低36.87%、弯矩降低35.85%、应力降低47.81%，耦合支护能够有效的维护顶板的稳定性；非等强耦合支护相对比等强耦合支护顶板最大位移降低10.29%、弯矩降低12.2%、应力降低29.53%，证明了非等强耦合支护策略对维护围岩稳定的有效性，进而提出超前液压支架群组–锚固耦合“连续渐变”非等强支护策略。采用辽宁省教育厅矿山沉陷灾害防治重点实验室设计的三维相似模拟实验台进行物理实验分析，验证“连续渐变”非等强耦合支护策略的有效性，并将实验结果与理论结果对比分析，等强支护位移最大误差7.2 mm，最大应力误差0.48 MPa，非等强耦合支护位移最大误差5.9 mm，应力最大误差0.19 MPa，考虑实验的复杂性认为误差在控制量范围内，验证所建立的超前液压支架群组–锚固耦合支护围岩力学模型的准确性和揭示耦合支护力学特性的有效性。最后，在温家庄煤矿15106工作面对“连续渐变”非等强支护策略进行现场应用实验，验证研究结果的有效性，研究结果为深部矿井围岩的安全稳定维护和智能化支护控制提供理论支撑。

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	张坤1
	2
	3
	李玉霞1
	钟东虎4
	孟祥军2
	黄庆学3
	徐亚军5
	陈洪月4
	马英5
	张德生5
	黄梁松1
	苏金鹏1

关键词 ：采矿工程, 超前液压支架群组, 耦合支护, 非等强支护策略, 力学特性, 相似模拟实验

Abstract：In order to research the supporting mechanical characteristics of advanced hydraulic support group and bolt (cable) coupling support for surrounding rocks，the Mindlin-Reissner plate theory was employed to describe the mechanical characteristics of the surrounding rock，and the energy functional was used to describe the supporting force of the equivalent support group and the bolt(cable) action. A mechanical model of the advanced hydraulic support group-anchor coupling support of surrounding rocks was established，in which the penalty function was introduced to constraint the model boundary strategies and the system control equations were obtained based on Hamilton principle. According to the advanced support parameters of the 15106 working face in Wenjiazhuang coal mine of Pingshu company of Shanxi Yangquan Group，the deformations as well as the bending moment and stress distributions of the roof under three strategies including the anchor support，the equal strength support and the non-equal strength support were obtained by solving the model with Ritz method. Comparisons of the supporting effects among three supporting strategies show that，compared with the anchor support，the maximum displacement，the bending moment and the stress of the roof under advanced hydraulic support group anchor coupling support are reduced by 36.87%，35.85% and 47.81%，respectively，indicating that the coupling support can effectively maintain the stability of the roof，and that，compared with the equal strong coupling support，the maximum displacement，the bending moment and the stress of the roof under the non-equal strength coupling support condition are reduced by 10.29%，12.2% and 29.53%，respectively，proving that the non-equal strength coupling support was effective to maintain the stability of the surrounding rock. Consequently，a “continuous gradient” non-equal strength support strategy of advanced hydraulic support group anchor coupling support was put forward. Laboratory tests by using the three-dimensional similar simulation experiment platform designed by the Key Laboratory of Mine Subsidence Disaster Prevention and Control of Department of Education of Liaoning Province were carried out to verify the effectiveness of the “continuous gradient” non-equal strong coupling support strategy，and the experimental results were compared with the theoretical results. It is revealed that the maximum displacement error and the maximum stress error of the equal strength support and the non-equal strength coupling support were respectively 7.2 mm and 0.48 MPa and 5.9 mm and 0.19 MPa，showing the accuracy of the mechanical model and the effectiveness of the mechanical characteristics of the coupling support considering the experiment complexity. Finally，the field application experiment of the “continuous gradient” non-equal strength support strategy was carried out in the 15106 working face of Wenjiazhuang coal mine to verify the effectiveness of the research results. The research results provide a theoretical support for the safety and stability maintenance and the intelligent support control of deep mine surrounding rocks.

Key words： mining engineering advanced hydraulic support group coupling support non-equal strength support strategy mechanical properties similarity simulation experiment

引用本文:

张坤1，2，3，李玉霞1，钟东虎4，孟祥军2，黄庆学3，徐亚军5，陈洪月4，马英5，张德生5，黄梁松1，苏金鹏1. 超前液压支架群组–锚固耦合支护力学特性研究及实验验证[J]. 岩石力学与工程学报, 2021, 40(7): 1428-1443.
ZHANG Kun1，2，3，LI Yuxia1，ZHONG Donghu4，MENG Xiangjun2，HUANG Qingxue3，XU Yajun5，CHEN Hongyue4，MA Ying5，ZHANG Desheng5，HUANG Liangsong1，SU Jinpeng1. Research and experimental verification of mechanical characteristics of advanced hydraulic support group-anchor coupling support. , 2021, 40(7): 1428-1443.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2020.1142 或 http://rockmech.whrsm.ac.cn/CN/Y2021/V40/I7/1428

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