Cavity 3D modeling and correlative techniques based on cavity monitoring

Abstract

According to the mining method for Dongguashan Copper Mine and Tongkeng Mine in China, and with the help of the cavity monitoring system(CMS) and mining software Surpac, the 3D cavity models were established exactly. A series of correlative techniques for calculating stope over-excavation and under-excavation, stope dilution and ore loss rates, and the blasting design of the pillar with complicated irregular boundaries were developed. These techniques were applied in Dongguashan Copper Mine and Tongkeng Mine successfully. Using these techniques, the dilution rates of stopes 52-2^#, 52-6^#, 52-8^# and 52-10^# of Dongguashan Copper Mine are calculated to be 2.12%, 8.46%, 12.67% and 10.68%, respectively, and the ore loss rates of stopes 52-6^# and 52-8^# are 4.41% and 3.70%, severally. Furthermore, according to the design accomplished by the technique for a pillar of Tongkeng Mine with irregular boundary, the volume, total length of boreholes and the dynamite quantity of the pillar are computed to be 1.2 × 10⁴ m³, 2.98 km and 10.97 t, correspondingly.

Keywords

cavity 3D modeling / cavity monitoring system / stope / dilution / loss rate / pillar blasting

References

[1] LUO Zhou-quan, YANG Biao, LIU Xiao-ming. Research on CMS-aided blast design for ore pillar extraction [J]. Metal Mine, 2007(3): 15–17. (in Chinese)

[2] LiuJ.-h., WangZ.-w., ZhuS., WengA.-h., XiaA.-ying.. The geophysical exploration about exhausted area and sinking area in coal mine [J]. Journal of China Coal Society, 2005, 30(6): 715-719

[3] LiuD.-w., DengY., YangF., XuG.-yuan.. Nondestructive testing for crack of tunnel lining using GRP [J]. Journal of Central South University of Technology, 2005, 12(S1): 120-124

[4] Optech System Corporation.Cavity monitoring system wireless user manual [M], 2004, Toronto, Optech System Corporation

[5] GermainP., HadjigeorgiouJ.. Influence of stope geometry and blasting patterns on recorded overbreak [J]. International Journal of Rock Mechanics and Mining Sciences, 1997, 34(3): 115-126

[6] LiuX.-m., LuoZ.-q., YangC.-xiang.. Analysis of stability of cavity based on cavity monitoring [J]. Rock and Soil Mechanics, 2007, 28(S): 521-526

[7] LiX.-b., LiD.-y., ZhaoG.-y., ZhouZ.-l., GongF.-qiang.. Detecting, disposal and safety evaluation of the underground goal in metal mines [J]. Journal of Mining and Safety Engineering, 2006, 23(1): 24-29

[8] HuberD., VandapelN.. Automatic 3D underground mine mapping [J]. International Journal of Robotics Research, 2005, 25(1): 7-17

[9] LuoZ.-q., LiuX.-m., SuJ.-h., WuY.-b., LiuW.-ping.. Deposit 3D modeling and application [J]. Journal of Central South University of Technology, 2007, 14(2): 225-229

[10] GongJ.-y., ChengP.-g., WangD.-yang.. Three dimensional modeling and application in geological exploration engineering [J]. Computers and Geosciences, 2004, 30(4): 391-404

[11] HouldingS. W.Practical geostatistics modeling and spatial analysis [M], 2000, New York, Springer-Verlag

[12] LemonA. M., JonesN. L.. Building solid models from boreholes and user-defined cross-sections [J]. Computers and Geosciences, 2003, 29(3): 547-555

[13] WuL. X.. Topological relations embodied in a generalized tri-prism (GTP) model for a 3D geosciences modeling system [J]. Computer and Geosciences, 2004, 30(4): 405-418

[14] ChenJ.-h., ZhouZ.-y., ChenG., GuD.-sheng.. Automatic formation method of prospecting line profile map based on drill hole database [J]. Journal of Central South University of Technology: Science and Technology, 2005, 36(3): 486-491

[15] FangY.-m., DengJ.-c., MiH.-yan.. Construction and visualization of 3D vacant place model [J]. Journal of Central South University of Technology, 2005, 15(S1): 61-64

[16] JAROSZ A P, SHEPHERD L. Open stope cavity monitoring for the control of dilution and ore loss [J]. Mining Engineering, 1998(8): 63–67.

[17] JohnG. H., HaniS. M.. Numerical modelling of ore dilution in blasthole stoping [J]. International Journal of Rock Mechanics and Mining Sciences, 2007, 44(5): 692-703