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| Automatic design of blast-hole pattern for smooth blasting of rock tunnel |
| ZHAO Gaofeng1, YIN Chaofan1, HU Xiaodong1, DENG Xifei2
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1. School of Civil Engineering, Tianjin University, Tianjin 300350, China;
2. The First Engineering Co., Ltd., China Tiesiju Civil Engineering Group, Hefei 230041, Anhui, China |
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Abstract Traditional blasting design is mainly based on experience, and lacks systematic automatic layout algorithm for blas-thole design when smooth blasting is used for rock tunnel. Combined with the design code of blasting and the existing algorithm of blast-hole pattern, this paper introduced a programmatic automatic algorithm of blast-hole pattern suitable for various cross-section shapes from the aspects of computer graphics, simplex integration and automatic layout. Through the characterization of data structure for tunnel cross-section, calculation of geometric parameter and the streamline of division blasting, algorithm of blast-hole pattern for each area was introduced in details. The algorithm was applied to automatic blast-hole pattern design for rock tunnels with four cross-section forms of irregular trapezoid, semicircle arch, circle and ellipse, which verified the feasibility of the algorithm.
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Received: 12 July 2020
Published: 20 September 2020
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