To solve the problems of the rapid advance of the working face was delayed by complicated working procedure and high labor intensity, and the severe damage of roof bolt (anchor cable) induced by advanced hydraulic support, the deformation characteristics of surrounding rock, and the supporting principle of grouting truss anchor cable were analyzed theoretically by taking the roadway of 3_(down) coal seams 2326# working face in Sanhekou coal mine as the research object; then, the mechanical model of supporting structure of roadway under goaf was established. Based on this model, the optimal supporting scheme was determined, and the active advanced support technology scheme of “advanced grouting truss anchor cable” was proposed to take the place of the existing single pillar. The deformation and failure characteristics of surrounding rock of the working face leading roadway were observed and analyzed on-site. Within the allowable range of reading error, the results showed that the maximum displacement of medium-deep base point and shallow base point of two roadways was 15.2 cm and 10.9 cm, respectively; the pressure value had a more obvious jump increase when the distance between each measuring point and the working face was about 35 m, which means the range is strongly affected by the advance mining, and the area affected by advanced mining was 35 m ahead of the working face. It was observed that the lowest position of roof separation development ranged from 0.71 m to 2.73 m. The separation layer was generally distributed in the range of 0.73 m-2.49 m, and the fracture area was roughly distributed in the range of 0.01 m-0.62 m. Under the condition of overlying goaf, there was a complete stress structure, which can meet the requirements of suspension support.

中文翻译：

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主动超前支护技术在采空区深巷道中的应用研究

解决工作面因工序复杂、劳动强度高而延迟快速推进、超前液压支架对顶板锚杆（锚索）破坏严重、围岩变形特性、支护等问题。以三河口煤矿2326#工作面3_（下）煤层巷道为研究对象，对桁架锚索的注浆原理进行了理论分析；然后，建立了采空区下巷道支护结构力学模型。在此模型的基础上，确定了最优支护方案，提出了“超前注浆桁架锚索”主动式超前支护技术方案，以替代现有的单柱。现场观察分析了工作面引巷围岩变形破坏特征。结果表明，在读数误差允许范围内，两条巷道中深基点和浅基点的最大位移分别为15.2 cm和10.9 cm；各测点距工作面约35 m时，压力值有较明显的跳跃增加，说明该范围受超前开采影响较大，超前开采影响区域为超前开采35 m。工作面。据观察，顶板分离发展的最低位置在 0.71 m 至 2.73 m 之间。分离层一般分布在0.73 m-2.49 m范围内，断裂面积大致分布在0范围内。01米-0.62米。在上覆采空区条件下，存在完整的受力结构，可以满足悬吊支护的要求。