BLAST-WindowMasker integration in BLAST+ search applications The BLAST+ search applications support integration with the windowmasker files via the -window_masker_taxid and the WINDOW_MASKER_PATH configuration parameter (see Configuring BLAST) or via the -window_masker_db command line option
A NEW PERIMETER CONTROL BLAST DESIGN CONCEPT FOR UNDERGROUND METAL/NONMETAL DRIFTING APPLICATIONS Stephen R Iverson, William A Hustrulid, and Jeffrey C Johnson DEPARTMENT OF HEALTH AND HUMAN SERVICES Centers for D isease Control and Prevention National Institute for Occupational Safety and Health
Acquisition ofthe current blast design p arameters Determination ofthe fragmentation size by SplitDesktopÛ image analyzing calculation of rock factor as representing rock mass prop erti es Optimization of blasting design parameters giving desired fragmentation and minimum drilling and blasting cost Close up diital
mechanisms in order to obtain smaller fragments The order of blast hole initiations together with the timing interval between holes has been observed to affect the blast results In this study, a series of small-scale tests, simulating bench blasting have been made to establish the effect of delays in the sequence of blast initiation
PSI-BLAST allows the user to build a PSSM (position-specific scoring matrix) using the results of the first BlastP run PHI-BLAST performs the search but limits alignments to those that match a pattern in the query DELTA-BLAST constructs a PSSM using the results of a Conserved Domain Database search and searches a sequence database
Jun 14, 2018· However, the general relations between the main blasting parameters; geology, blastability and explosives, will be applicable, and the estimation model is a very good tool for planning test blasts and experiments, and also for adjustments of the blast design when this is necessary for optimising the quarry production line as time progresses .
parameters for the corresponding models Within the context of this paper, underground ring blasting refers to long hole blasting techniques as applied in mining methods such as bench stoping, sub level open stoping and SLC including undercut blasting and drawbell blasting in the case of block and panel caving methods All of these methods have .
blasting and its details along with timing – The shotfirer should have knowledge necessary to determine the consumption of explosives for the individual holes and the entire round – The shotfirer must be familiar with the problems related to vibration, air blast (blast wave), noise and dust while blasting
National Institute of Technology Rourkela This is to certify that the thesis entitled “ Optimization of Blasting Parameters in Opencast Mines ” submitted by Sri Manmit Rout (Roll No: 10305019) and Sri Chinmay Kumar Parida (Roll No: 10305017), in fulfillment of the ,
Oct 12, 2012· 3 Blast design Calculations and empirical formulas: In designing a blast, following principles should be kept in mind: Explosive force functions best when the rock being blasted has a free face toward which it can break There must be an adequate void or open space into which the broken rock can move and expand (or swell)
Rock Fragmentation Control in Blasting Sang Ho Cho and Katsuhiko Kaneko Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan Rock fragmentation, which is the fragment size distributionof blasted rock material, is used in the miningindustry as an index to estimate the eﬀect of bench blasting
D=blast hole diameter (mm), W=standard deviation of the drilling accuracy (m), L=total charge length (m), H=Bench height (m)Cunningham (1987) notes that the uniformity coefficient n usually varies between 08 and 15 13 Bench Blasting Parameters Bench blasting in open pit operations are classified according to their purpose
The Basic Local Alignment Search Tool (BLAST) finds regions of local similarity between protein or nucleotide sequenc The program compares nucleotide or protein sequences to sequence in a database and calculates the statistical significance of the match This chapter first provides an introduction to BLAST and then describes the practical application of different BLAST programs ,
drill patterns can be kept within design parameters The best initiation system for trench blasting, electric or nonelectric, uses detonators designed to resist transient dynamic shock Dyno Nobel NONEL® and Electric Super detonators have built-in safeguards to minimize damage from dynamic shock
May 31, 2015· Burden Calculations Welcome to Academy Blasting’s video on burden calculations for bench blasting applications! In this short 3 minute video by Anthony Konya, we will learn how to calculate burdens in both imperial and metric units
shift for drill and blast personnel at these large surface mines, and the explosives industry has yet to create a blast design method specifically tailored for large surface coal mine bench blasting This research examines the typical scale of bench blasting at large surface coal
Site-specific empirical relationships for calculation of blast-induced vibration parameters like peak particle velocity (PPV) and peak particle displacement (PPD) are commonly used for estimation of blast loads in design However, these relationships are not able to consider the variation in rock parameters and uncertainty of in situ conditions
Drill and Blast Method Drill and blast method is mostly used method for the excavation throughout the world The method can be used in all types of rocks and the initial cost is lower than the mechanical method like TBM This tunneling method involves the use of explosiv
Fragment Size Distribution in Blasting Sang Ho Cho1, Masaaki Nishi2, Masaaki Yamamoto3 and Katsuhiko Kaneko1 1Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan 2Asahi Kasei Corporation, Nobeoka 882-0854, Japan 3Asahi Kasei Geotechnologies Co, LTD, Tokyo 108-0075, Japan It is well known that rock is generally treated as a heterogeneous material and the ,
ABRASIVE BLASTING OPERATIONS ENGINEERING CONTROL AND WORK PRACTICES MANUAL I INTRODUCTION The United States Department of Health, Education, and Welfare's National Institute for Occupational Safety and Health (NIOSH) is responsible for conducting research and developing educational and training materials in the
Powder Factor is the relationship of Explosives to Volume It describes how much explosives are needed to blast a particular volume of rock The easy formula is PF = (lbs of explosives used) / (yd .
About: Kingery-Bulmash Blast Parameter Calculator Airblast parameters calculated from range, NEQ and TNT equivalence using the polynomials described in "Airblast parameters from TNT spherical air .
Notes on Bench Blasting - Blast Parameters for a Specified Vibration Threshold This tool determines the maximum explosive charge for a specified distance, or the minimum distance for a specified charge, for a selected threshold value of peak particle velocity (PPV), given appropriate values of ,
Bench Blasting Bench Blasting Basics Bench blasting consists of drilling holes in the rock at depths, in diameters, and at spacing so that the ANFO (which is a mixture of Ammonium Nitrate[fertilizer] and Fuel Oil [diesel fuel]) as a column charge,together with a bottom charge, can fracture the rock in a controlled manner
blast, contamination of coal or loss of coal A simulation was developed in Microsoft Excel to model blasting results while changing various parameters From the simulation results, it could be seen that a change of blast design could be beneficial As an example, smaller drilling patterns were
understood that the theoretical blast design is only the starting point for blasting operations in the field CHAPTER 13 BLASTING ROCK ENCE 420 ©Assakkaf Slide No 33 BLAST DESIGNBLAST DESIGN A trial blast should always be performed It will either validate the initial assumptions or provide the information needed for final blast design
delay times on rock fragmentation in bench blasts This thesis tests whether or not short hole-to-hole delay times improve rock fragmentation in full scale bench blasting Six different delay times were tested during four blasts at a granite quarry in Talbotton, GA
controlled drilling and blasting must be needed to allow safe operation of the pit 2 Drilling Production drilling will be done with electric drills with a 15m bench height Similar sites and a study done by Orica (refer to Appendix A – KSM-SABREX Study) show that a drill hole diameter of
Calculation of Blast Loads for Application to Structural Components Administrative Arrangement No JRC 32253-2011 with DG-HOME Activity A5 - Blast Simulation Technology Development