Deformation and failure mechanism of entity coal side and its control technology for roadway driving along next goaf in fully mechanized top coal caving face of deep mines

被引：0
|
作者：
Zhang Y.-C. [1 ]
Yang S.-Q. [1 ,2 ]
Chen M. [1 ]
Zang C.-W. [3 ]
Long J.-K. [1 ]
机构：
[1] State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, 221116, Jiangsu
[2] School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou, 221116, Jiangsu
[3] College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao, 266590, Shandong
来源：
Yang, Sheng-Qi (yangsqi@hotmail.com) | 1600年 / Academia Sinica卷 / 38期
基金：
中国国家自然科学基金;
关键词：
Control technology; Distinct element modelling; Entity coal side; Fully mechanized top coal caving face of deep mine; Roadway driving along next goaf;
D O I：
10.16285/j.rsm.2017.04.023
中图分类号：
学科分类号：
摘要：
The entity coal side of 1306 tailgate, Dongtan mine, showed evident large deformation and serious squeezing failure during excavation. The UDEC (Universal Distinct Element Code) model of roadway driving along next goaf in the fully mechanized top coal caving face of deep mines is established to analyze the failure location of main roof and the evolution law of stress and displacement of surrounding rock. The mechanisms of deformation and failure of the entity coal side are revealed that the rotation of key block in main roof results in the inside shift of its fracture line. The high abutment pressure caused by the movement of the roof structure is distributed on entity coal side. The high squeezing stress finally leads to strong extrusion and rheological behavior of entity coal side. Based on the analysis of failure mechanisms of the entity coal side, supporting measures are proposed by combining bolt-mesh and long cables with high strength and yielding capability. Numerical results and field monitoring data show that the large deformation of entity coal side is decreased effectively, and its displacement is well controlled within 300 mm in the support of φ22 mm×6800 mm long cables with the strength of 600 kN and yielding capability of 260~300 kN. The stability of 1306 roadway is guaranteed by these supporting measures. © 2017, Science Press. All right reserved.
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页码：1103 / 1113
页数：10
相关论文
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