Study On The Key Technology In Digital Exploration Of Underground Mine

As a hot issue in domestic mining industry, digital mine is classified by the Ministry of Science and Technology as one of the key projects in national frontier science research program (863 program), namely "key technologies in digital mining and software development". In view of the current development status of the domestic mines and mining informationization, this paper tends to conduct a profound and analytical research on the key technologies of digital exploration for underground mines. The study also touches upon the modeling technology of tridimensional dynamic entity and design technology of digital exploration, which provides software platform for the digital exploration. Besides, it is more suitable for our current mining informationization state and can bring feasible guidance to the production and design of mines, lead to substantial social and economic benefit to the enterprises.This paper demonstrates the connotation and study content of digital exploration on the basis of the analysis of the targets and technical obstacles of digital mines, and proposes four key technologies: (1) modeling of dynamic tridimensional geological entity; (2) modeling of designed structure; (3) digital exploration aided design; (4) rapid measurement of digital exploration. This sets up the technical route and framework for digital exploration and provides a systemic guideline for further study.For the mining geologic material must be modified in accordance with the production status, the author put forward the construction algorithms for the dynamic physical model of tridimensional triangulational tetrahedron. In light of the principle of the collection of minimum energy, the modeling system of tridimensional geological entity model can be accomplished on the basis of drilling sampling and the profile map of prospecting line and within the restriction of horizontal profile map. Therefore, the construction of dynamic tridimensional geological entity model shall be completed. The finished tridimensional geological entity model may conduct real-time orebody modification based on the change of ore boundary, which makes the model resemble reality and more applicable.In the dynamic modeling process, this paper attempts to provide solutions to the methods of drawing digitization, the space resetting algorithms of planar drawings, the wedging-out construction algorithms of geological entities, the construction algorithm of faults and joints, the algorithms for the identification of minimum separation angle at the ore edge and the regularization method for the absence of orebody torsion. The study on these algorithms lays a sound theoretical foundation for the modeling of dynamic entity.Also this paper discusses the classification of the designed structure model of underground mines. The shaft sinking and drifting can be divided into measured shaft and designed shaft, which may be respectively applied to the construction algorithms of curved cross section successive lofting and rectangular cross section stretching. As for the ramp engineering, the author put forward the difference incremental algorithms for the planar graph gradients. The modeling of above-ground structures shall apply the simulation construction algorithms of external tridimensional predefined physical model. The human-computer interaction may make the physical model of the designed structure accurate, vivid and lifelike.On the ground of the formation of tridimensional digital physical model in the mining design process, this paper put forth the sectioning algorithms in the process of drawing creation, the data display structure of laneway, the data transmission structure of shaft design, the clipping algorithm in shaft design. Then the author completes such design projects as shaft sinking and drifting aided design, shop drawing aided design, blasting design, etc. Therefore, the mining design module is accomplished. In this regard, the author discusses the ore quantity calculation, grade estimate, blasting ore quantity calculation, measurement and checking summary and other rapid measurement system of digital exploration aided design. The study on the digital exploration aided design can greatly decrease the complexity of designing and cut sown the workload of designers.On the grounds of these studies, the author takes the digital exploration of Gong ChangLing shaft of Angang Mining Corporation, taking the AutoCAD2007 as platform, the Object ARX 2007 as interface, and making use of .NET programming language and SQL Sever 2000 database. The platform of digital exploration software may accomplish geological drawing treatment, construction of dynamic physical model, modeling of designed structure, mining aided design, project rapid calculation, measurement and checking system, production plan aided layout and aided instrument. This may mitigate the labor intensity of the workers, increase mining efficiency and cut down production cost and bring about substantial economic and social benefits.