X1 and X2 are the minimum and maximum Easting.ĥ. Open up the string file and display a grid. Note: Make sure the widths on each side allow for the entire database to be extracted. Y1 and Y2 represent a straight line through the center of the ore body, and section range represents the northing that the section will be cut on. The section range, Y1 and Y2 need to be the same as we are extracting a cross section through the database with a large window either side. Note: This is a function that extracts the database as strings.Ĥ. Fill in the form ‘Extract sections for plotting’ and click ‘Apply’.Įnsure Y1 and Y2 are the same number as section range. Select Database > Extract> Sections for plotting. Open up the drillhole database in Surpac and display the holes.Ģ. Display a grid so you can work out the location of the center of the database.ģ. Here are the 10 steps to extract your drillhole database as a string file in GEOVIA Surpac™.ġ.
Additionally, surveyors may also want to use the drillholes in an external package. By extracting the database as a string file, users can look at the drillholes they are interested in. Knowing the location of a drillhole is very important from both a design and safety perspective. In this context, they will interrogate the database if they plan to develop close to or through an orebody or to monitor the development in relation to geological structures or faults or to minimize the likelihood of water inundation from a hole that has intercepted the groundwater table or a perched aquifer. Typically, engineers and surveyors are only interested in the drillholes containing intercepts within the mine reserve and will generally use the drillhole database in underground development design. Below is an example of a folder structure to work from and a brief description of each.Geology databases are usually huge. It is important that you must already have a folder structure for your design setup already usually in a common network drive. (b) A good folder structure to store data That sequence aims to achieve budgeted ore tons and grades together with the associated stripping.īlast master design has a separate procedure on its own and won’t be discussed in detail but will be included in the appendix of this course book. It sets out individual blast patterns on a bench and indicates the optimal sequence of drilling and blasting. This is usually designed in advance of any pattern design. The blast master contains polygons (closed strings) of pattern outlines showing the shapes, drilling and firing sequence. It is advisable that any one new to Surpac should at least go through the “Introduction to Surpac tutorial” and the “Drilling and Blasting tutorial”.įor any blast design in Surpac, the following are the main requirements one would use to successfully design a pattern
SURPAC DRILLHOLES TO STRING FILE SOFTWARE
The main objective of this course book is not to discuss in detail the theory behind drilling and blasting, but to get one up to speed quickly in utilizing the software tools available to design blast patterns. Not only do these provide evidence of the quality of his work, but they also provide a wealth of information upon which he can draw as future blasting situations develop (Source: Partha Das Sharma, Rock Breakage and Blast Design Considerations in Open Pit). Thus, for a blaster, valuable tool is the file of blast reports that he builds as he gains experience. Good drilling practice include carefully monitoring drill-rig operating parameters, taking careful notes of the changes in geology during drilling, and effectively communicating to the blasting crew any unusual conditions encountered during drilling that may affect blasting results or require changes in hole loading practices.īlast designing is not a science, but knowledge, experience, studying and analyzing past practices in relation to rock strata & geology etc., makes blaster to achieve perfection. In surface mining operations, the purpose of drilling into rock is to provide a “blast hole” into which explosives can be loaded (Source: Blast Hole Drilling Module-4). The degree and the efficiency through which drilling and blasting is done actually determines the quality of the broken material for eventual downstream processing.
SURPAC DRILLHOLES TO STRING FILE FREE
Drilling and Blasting in any hard rock mine is the first process to free the ore from the in situ or host rocks.