大采高孤岛工作面片帮原因及控制技术研究

发布时间：2018-06-08 03:12

本文选题：孤岛工作面 + 大采高　；参考：《煤炭科学技术》2017年05期

【摘要】：针对大采高孤岛工作面易发生片帮冒顶的难题,采用理论分析、数值模拟和现场实践的方法,对大采高孤岛工作面片帮冒顶原因及控制技术进行研究。研究结果表明:大采高工作面片帮冒顶不仅归因于围岩应力大、自由空间大、煤体裂隙发育程度高等自然因素,还受支架初撑力低、支护不及时等工程因素的影响。首次提出采用"棕绳+注浆"全长锚固技术相结合的综合控制技术,煤体与棕绳胶结为一体,显著增加了煤体的自承能力,增强了煤体的抗剪强度和拉伸力,且其应用成本明显低于传统的锚杆或锚索技术。通过数值模拟分析验证了该技术的控制效果,并在现场得到了成功应用,有效控制了煤壁片帮冒顶的发生,为类似大采高工作面煤壁片帮冒顶的防治提供了经验。
[Abstract]:In view of the difficult problem of the roof of the big Gudao island working face, a theoretical analysis, numerical simulation and field practice are used to study the reasons and control techniques of the roof of the working face of the Gudao island. The results show that the roof of the large mining height working face is not only attributable to the large stress of the surrounding rock, the large free space and the fracture of the coal body. The natural factors of high development degree are also influenced by the engineering factors such as the low support force of the support and the untimely support of the support. It is the first time that the integrated control technology combined with the full length anchorage technology of "Brown rope + grouting" is first proposed. The coal body and the Brown rope cementation are integrated, and the self bearing capacity of the coal body is increased significantly, the shear strength and tensile strength of the coal are enhanced, and it should be strengthened. The cost is obviously lower than the traditional anchor bolt or anchor cable technology. Through the numerical simulation analysis, the control effect of the technology is verified, and the successful application in the field has been successfully applied to effectively control the occurrence of the roof of the coal wall, which provides experience for the prevention and control of the roof of the coal wall similar to the large coal mining face.
【作者单位】：郑州矿山救护大队;河南理工大学化学化工学院;
【基金】：国家自然科学基金煤炭联合基金重点资助项目(U1261207)
【分类号】：TD323;TD355

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