SURVEYING MAINTENANCE

Tasks

Preparing and maintaining geodetic point catalogue

Processing field measurements

Maintaining plans of mining operations and industrial sites

Creating geological sections

Calculating production volume

Results

Advantages

The technological product line of CREDO software complex is used for maintenance of survey at mining plant and includes such products as CREDO_DAT, CREDO TOPOPLAN, CREDO GEOLOGY, CREDO VOLUMES, TRANSCOR, TRANSFORM and NIVELIR.

TASKS

Preparing and maintaining geodetic point catalogue.
Processing field measurements.
Digitizing paper cartographic documents.
Maintaining plans of mining operations and industrial sites.
Creating geological sections.
Calculating production volume.
Preparing output documents.

PREPARING AND MAINTAINING GEODETIC POINT CATALOGUE

At the initial stage of conducting any mining activities, specialists perform a number of office tasks on completing and maintaining the catalogue of reference points.  When processing them, the surveyor may encounter a problem of reference point coordinates being represented in different systems. TRANSCOR allows the professional to solve the problems of geocentric, geodetic and rectangular coordinates transformation as well as configure transformation parameters.

The next task is setting coordinate system and eliminating various distortions of a raster document.  Discrepancies may be caused by deformation of the original document or errors in scanning the mining plans.  TRANSFORM will fix possible defects in the original document (traces of paper folds, areas with uneven scale), “merge” and create a common outline of bitmap fragment visibility as well as complete and issue the drawing.

The user can design and configure control networks in CREDO_DAT before creating them on site. The system allows you to set measurement precision optimal for the required root mean square errors of control point coordinates.  The technology is based on a widespread use of interactive input and data edit with cartographic documents as bitmap substrates.

PROCESSING FIELD MEASUREMENTS

Measurements obtained with the use of theodolites, levelling instruments, EDMs and tape lines are saved to field logs. These data are imported to CREDO_DAT and NIVELIR systems in a user-friendly tabular form. It’s more convenient to import all the results of field measurements performed with the help of modern electronic measuring instruments.

Data from total stations and levelling instruments of most manufacturers can be imported to the systems of engineering-geodetic software complex.  In such way a "digital sketch" of the survey is made and semantics is added. Geodesist or mine surveyor adjusts the classifier of area, linear and point objects and encodes them in the course of field work.

After reference measurements have been entered, the system pre-processes them, applies required corrections and reductions, computes preadjusted point coordinates and registers tolerance violations. In addition, a graphical interactive analysis of traverses and polygons as well as a search for blunders are available.

After all the blunders are eliminated, a specialist adjusts theodolite traverses and leveling lines as well as horizontal and vertical control networks.  The system automatically recognizes and divides data by measurement types, and creates network connections.

MAINTAINING PLANS OF MINING OPERATIONS AND INDUSTRIAL SITES

Plans of mining operations and industrial sites include a terrain and situation models.  The situation is described by area, linear and point objects. As a result of situational objects and terrain description, a mine surveyor obtains a digital terrain model of engineering pattern.

CREDO TOPOPLAN system has special methods for vertical leveling which are steep or almost steep surfaces. Among such sufaces are open pit sides, cliffs, retaining walls etc. As a result, the digital terrain model is 3D which allows viewing relief profile on any section.

CREATING GEOLOGICAL SECTIONS

When it comes to processing geological surveys, professionals from many mining enterprises rely more on using a digital geologic framework model rather than maintaining data only on paper.  This model serves as an informational basis for further cooperation with other units and organizations.

In CREDO software complex such model is the 3D geological model of CREDO GEOLOGY system. It is the source of data used for creating additional engineering-geological materials: testing plans, isohypses, hydroisohypses, plans for superface and subface of lithologic or stratigraphic stratum.  By using features of CREDO engineering-geological complex, a mine surveyor or a geologic engineer can obtain points with X, Y and Z coordinates where marks of superface or subface stratum, ground-water surface, layer thickness or testing value on a given depth can act as an absolute mark.  The data received are saved to the structure of the digital terrain model.

CALCULATING PRODUCTION VOLUME

The most important task at digging is the calculation of production volume. Calculation of production volume between digital surface models is carried out in CREDO VOLUMES system. Their accuracy in relation to the actual volume of physical surfaces depends only on the extent of compliance of surface models, between which the volumes are computed, with the actual existing or project surfaces.

There are two methods for calculating volume of soul in CREDO technological product line: by parallel sections and between the surfaces.

During the process of creating parallel sections, the areas of lithologic layers are calculated automatically.  By summing up the calculated areas the professional obtains required volume of soils on the entire site.

The other calculation method uses the superface and subface surfaces of the desired stratum within which the volume between the two surfaces is calculated.
Computing volumes with geology is available if there is a 3D geological model.

RESULTS

At all stages of field measurement processing and adjustment there is a graphic illustration of actions which can be generated in accordance with regulatory requirements. Reference measurements, preadjusted point coordinates, accuracy evaluation reports for traverses, measurements, horizontal and vertical control point location are configurable and can be sent to print.

Earth quantities can be presented in a square net at arbitrary contour.

In order to generate a report you can use templates which are configurable in templates Editor.

ADVANTAGES

Implementing CREDO software complex into the work of mining enterprise can significantly increase its productivity.  This is achieved through the work of a surveyor in a single information space, by eliminating time expenditures for preparing and transferring digital data between different systems. At the same time, the probability of data corruption decreases, integrity and safety of data are ensured which eventually makes it possible to use information more efficiently.