Rock and Soil Mechanics ›› 2021, Vol. 42 ›› Issue (3): 620-626.doi: 10.16285/j.rsm.2020.0897

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Experimental study on roadway rockburst prevention by combined bolt - aluminum foam support

YAO Jing-ming1, 2, XU Zi-wen1, 2, WANG Jian3, WANG Lu4   

  1. 1. School of Resources and Safety, Chongqing University, Chongqing 400044, China; 2. State Key Laboratory of Coal Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China; 3. Datong No.1 Mine, Yuxin Energy Co., Ltd., Chongqing 401445, China; 4. No. 3 Engineering Co., Ltd. of CCCC Third Harbor Engineering Co., Ltd., Nanjing, Jiangsu 210011, China
  • Received:2020-06-28 Revised:2020-12-25 Online:2021-03-11 Published:2021-03-15
  • Supported by:
    This work was supported by the National Natural Science Foundation of China(51974043).

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Abstract: Controlling of surrounding rock is very important for roadway rockburst prevention. Based on occurring conditions of rockbursts and mechanical properties of bolt and aluminum foam, a new support technology using combined bolt-aluminum foam support is proposed to prevent roadway rockburst. To study the supporting mechanism of combined bolt-aluminum foam in rockburst prevention, the mechanical properties of combined bolt-aluminum foam supporting samples were experimentally studied based on the similar simulation theory. The research results suggest that: the uniaxial compressive strength of samples is directly proportional to the bolt supporting density, and the relationship is positively exponential with the supporting thickness of aluminum foam; both bolt supporting density and aluminum foam supporting thickness relationships are linear positive with the consumed energy of complete samples destruction, negatively linear with remaining energy coefficient of samples, and negative logarithmic with elastic energy index and impact energy index of the samples. Therefore, impact failure of the samples is reduced by the increase of bolt supporting density and aluminum foam supporting thickness. The research results provide a theoretical basis for roadway rockburst prevention with combining bolt and aluminum foam.

Key words: rockburst, similar simulation, foam aluminum, bolt, mechanism

CLC Number: 

  • TD314
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