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工业快报
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政策快报
工业快报
政策快报
In order to achieve the quantitative design of support parameters of rock burst roadway, a design method of support parameters was proposed for rock burst roadway based on energy calculation, which mainly includes the assessment of roadway rockburst risk, determination of source parameters, determination of maximum impact kinetic energy of roadway surrounding rock and determination of energy absorption of support structure. First of all, theoretical calculation, numerical simulation and laboratory tests were used to determine that the impact kinetic energy and displacement potential energy released per unit area of the upper roadway of the 13230 working face was 78. 53 kJ/ m2. Based on the energy calculation method, the support parameters of the upper roadway of the 13230 working face were determined. The energy absorption of the tertiary support system was 82. 66 kJ/ m2. Based on the energy calculation method, the support parameters of the upper roadway of the 13230 working face were determined, the industrial test of the three-level support system was carried out in the mine, and the results show that, the initial stress of the bolt (cable) is low; With the increase of the deformation of the surrounding rock, the stress of the bolt (cable) gradually increases, and then remains stable; Under the action of the high energy impact event, the stress of the bolt support structure fluctuates to a certain extent, but the deformation of the roadway is not large; The three-level support system effectively controlled the deformation and damage of the roadway under the high energy burst event, and effectively dissipated the burst kinetic energy.
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龙智造旗下工业资讯
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