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首页> 外文期刊>Shock and vibration >Three-Dimensional Physical Simulation and Control Technology of Roof Movement Characteristics in Non-Pillar Gob-Side Entry Retaining by Roof Cutting
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Three-Dimensional Physical Simulation and Control Technology of Roof Movement Characteristics in Non-Pillar Gob-Side Entry Retaining by Roof Cutting

机译：屋顶切割屋顶切口挡住屋顶运动特性的三维物理仿真及控制技术

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摘要

An overlying rock structure plays a key role in controlling the roof deformation of nonpillar gob-side entry retaining by roof cutting. On the bases of the actual geological conditions of II 632 Haulage Roadway at the Hengyuan coal mine, a similar three-dimensional simulation experiment of roof precutting is conducted. Thereafter, the caving characteristics and migration law of the roof strata in the strike and dip directions are obtained. Moreover, the roof of the retained roadway and key strata of the goaf can form a hinge structure of the key blocks. By monitoring the deformation of the surrounding rock and stress distribution of the roof, the skew deformation characteristics of roadway roof are obtained. By observing the borehole peeping technology, the roof subsidence near the goaf is determined to be greater than that of the solid coal side, and the roof subsidence of the gob-side entry retained by roof cutting is greater than that of the floor heave and two sides approaching. Results of the three-dimensional similar simulation experiment indicate that the mechanical structure model of the key block of the retained roadway roof is constructed, and the mechanical analytical solution of the required support resistance of the retained roadway roof is obtained. This study proposes the constant resistance and large deformation anchor cable reinforcement support method to control the roof deformation of the retaining roadway. Through engineering application, the maximum value of the roof and floor movement of the retained roadway is stable at approximately 650?mm. The retained roadway can meet the demand of the next mining face.
机译：覆盖的岩石结构在控制屋顶切割挡住屋顶切割的非宝石凝胶侧入口的屋顶变形方面发挥着关键作用。在衡源煤矿II 632牵引车道的实际地质条件的基础上，进行了类似的屋顶衬底仿真实验。此后，获得了击球和倾角的屋顶地层的腔特性和迁移规律。此外，储存道路的屋顶和射击的关键地层可以形成钥匙块的铰链结构。通过监测屋顶的周围岩石和应力分布的变形，获得了道路屋顶的歪斜变形特性。通过观察到钻孔偷窥技术，屋顶沉降的屋顶沉降被确定为大于固体煤侧的屋顶，屋顶切割保留的舷梯入口的屋顶沉降大于地板升降的屋顶沉降双方接近。三维类似仿真实验的结果表明，储存道路屋顶的钥匙块的机械结构模型被构造，获得了保留道路屋顶所需支撑电阻的机械分析解决方法。本研究提出了恒定的电阻和大变形锚固件电缆加强件支持方法，以控制保持道路的屋顶变形。通过工程应用，屋顶的最大值和保留的道路的底板运动稳定在大约650？mm。保留的道路可以满足下一个采矿面的需求。

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