No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
Similar study has been done at home and abroad on the impact of short distance blasting [1,2,3,4].Some questions that the dynamic response of the existing tunnel lining and surrounding rock are studied under the blasting load, on the basis of the existing research theory and a newly closely spaced built tunnel.
The results showed that blasting of the second hole had a serious impact on the safety of the first hole lining structure. Based on the safety threshold and analysis of sensitivity, the explosive velocity, charge density, and digging length were selected as the key parameters affecting the safety of the tunnel structure.
3. Accurate Load Model for Blasting Analysis. The load exerted on the wall of the blasting hole after blasting is an intricate process. Following the principle of explosive initiation and action, the entire blasting process can be roughly classified into four stages: rapid increase of blasting pressure, expansion of blasting hole volume, rapid ejection of gas along the hole …
In order to study the propagation law of blast vibration in soft rock tunnels, Chen et al. [11] carried out an analysis and research on the measured data by blast vibration tests and used ...
In this paper, a new safety control method of the jointed slope under blasting excavation is presented. The spatial distribution of blasting damage and time-history characteristic of dynamic stability around the joint were investigated carefully based on the secondary development of the explicit FE code, LS-DYNA. Results clearly indicated that the evolution law …
open-pit coal mine in Xinjiang as a pilot research target area, through field tests and analysis, key technology of open-pit slope blasting of heterogeneous rock mass was proposed, which combined the application of open-pit coal mine blasting site technology, ensured the safety and stability of slopes under short-range blasting operations.
Drilling and blasting techniques are the most economical operation for the removal of overburden and extraction of coal in an open-pit coal mine. Blasting in a fiery seam is one the most dangerous ...
Blasting constitutes a crucial aspect of mining and construction activities, influencing both productivity and safety. The process of blasting in mining and construction operations demands meticulous attention to various factors including rock type, blast area dimensions, and the selection of explosives (Yang et al., 2019, Qiu et al., 2018).In recent years, there has been …
Learn about the hazards of abrasive blasting, recent incidents, and essential safety measures to prevent injuries and legal issues in the coatings industry.
Pre-splitting blast at a Coal Mine ERG Industrial. Safety & Wall Stability. Ensuring stable high walls is of utmost importance in any project, be it open-pit mines, quarries, or civil engineering endeavours. Pre-splitting is a technique used to establish a secure boundary between the blasted material and intact rock.
analysis and a blank job safety analysis form are included at the back of this booklet. It is important to note that the job procedures in this booklet are for illustration only and do not necessarily include all steps, hazards, or protections for similar jobs in industry.
The analysis identified basic and intermediate events that led to the misfiring of open pit mines blasting operation and graphically depicted the interrelationship between these various ...
In addition, the maximum peak velocity at 80 m at the top of the slope was 1.8 cm/s, which is less than the safe peak value of 2.5 cm/s specified in the Blasting Safety Regulations, indicating that the use of millisecond blasting has a lesser impact outside the blasting area and meets the safety requirements.
The blasting for bedrock excavation on land for open channel project has a great influence on lock gate in Taishan Nuclear Power Station, therefore, based on blasting vibration monitoring data, the attenuation law of blasting vibration signal has been studied through regression analysis of practical test data by Sadaovsk empirical formula and corresponding …
Health & Environmental Control 1910.94 (a) Abrasive blasting, and other safety information to guide you in safe abrasive blasting operations. Abrasive blasting hazards ... access door, the large work-access door may open or close from the outside only. Blast cleaning enclosures and recommended air velocities . Examples of .
Understanding blasting safety and putting it into practice can mean distinguishing between a successful blast and an absolute disaster. Blasting safety involves assessing, …
The blasting block size of open-pit mines is influenced by many factors, and the influencing factors have a very complex nonlinear relationship. Traditional empirical formulas and a single neural ...
When abrasive blasting the air and blasting material come out at extremely high speeds. If the operator accidentally aims it at a person in the area, they can experience severe injuries. Even if they are wearing breathing protection, the velocity of the blasting material itself can cause severe skin and eye injuries.
Abrasive blasting, often simply referred to as sandblasting, is a process where compressed air or water propels abrasive material against a surface. This technique is used for various …
In open pit mines, the blasting operation should be effectively optimized at the lowest possible total cost, providing technical specifications and the required safety norms. ... the analysis of ...
Consultation Program for advice on safety and health issues. DSG FS-3697 09/2014 This is one in a series of informational fact sheets highlighting OSHA programs, policies or standards. ... the blasting materials on safety data sheets (SDS) as required under OSHA's Hazard Communication standard (29 CFR 1910.1200).
This job safety analysis document summarizes the hazards and safety procedures for operating a small blasting booth. It identifies potential hazards such as electric shock, abrasive dust particles, and ergonomic issues. Current controls include proper personal protective equipment like respiratory masks, goggles, and gloves. Risks are assessed based on the consequence and …
Mining of raw materials is a process that consists of several stages. In open-pit mining, material with high compressive strength is extracted by drilling and blasting and material with low compressive strength is extracted by e. g. a bucket wheel excavator. Most important influencing factors for crusher decision are compressive strength, moisture content, capacity of …
In bench blasting, backbreak is the unwanted result that causes instability to the highwall and can lead to safety hazards. Hence, it is utmost necessary to minimize the generation of backbreak to improve mine's safety. It has always been difficult to predict the backbreak because of various parameters involved, i.e. blast design, explosive properties, rock mass, etc. In this study ...
These FAQs are designed to provide a basic understanding of sand blasting safety practices and should be supplemented with detailed safety training and ... Job Safety Analysis || Hot work JSA || Welding, Grinding & Cutting JSA. June 07, 2022. NEBOSH IGC Solved Question paper - (Open Book Exam) | Nebosh Igc Question Paper. June 09, 2022. 4 ...
Abrasive Blasting: Protecting Workers from the Hazards of Abrasive Blasting Materials Fact Sheet
By reviewing the development history and the state-of-art, this paper introduces Chinese safety regulations for blasting vibration for adjacent structures and equipments, as well as for structures themselves under blasting operation, such as high rock slopes, underground caverns, foundation rock masses, and fresh concrete. The mechanism of failures or damages …
The propagation process of blasting vibration has always been a difficult problem affecting the stability of high slopes in open-pit mines. Taking the Jianshan Phosphorus Mine as the research background, combined with engineering geological investigation, field blasting test, blasting vibration monitoring, numerical simulation technology, and theoretical analysis, the …
Many studies 18,19 used wavelet analysis for the blasting vibration waves, which provided a theoretical basis to prevent lasting vibration destruction and a safety criterion for blasting vibration ...
The stability of the dump has a very important meaning on regular production of mine and safety of workers and machine. The stability of slope is also a very important issue in the process of open pit mining while the vibration mining of blasting has some impact on the stability of dump and slope (Xing, 2004; Zheng et al., 2011; Li et al., 2010; Huang et al., 2011).
