GNC Industrial Services | On-Site Coating & Blasting Services
With over 15 years of experience, GNC offers premier coating & blasting services for industrial and oilfield companies looking to improve the appearance and the quality of their equipment. We offer services throughout Texas and the Gulf Coast Region. ... Guaranteed to meet the required surface profile with a wide-assortment of media grade or size;
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Numerical study on rock blasting assisted by in-situ stress
The present numerical studies on the rock blasting under in-situ stress are performed by the dynamic finite element code LS-DYNA. In LS-DYNA, the models commonly …
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In-situ SCR Catalyst Cleaning | Thompson Industrial Services
Whether you are dealing with hardened fly ash, popcorn ash (LPA), or MgO plugging, results continually show the catalyst to be effectively cleared of chemical and physical deactivation substances, a decrease in pressure drop, increase in reaction surface, decrease in ammonia slip and increased plant efficiency.
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Numerical simulation of rock blasting under different in …
reflection tensile failure of the joint surface was weaker than that without filling. The coupling between the tensile crack generated by the reflection tensile action of the joint surface and the blasting main crack enhanced the fracture degree of the rock mass between the explosion source and the joint.
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Research on the damage characteristics of rock masses …
In complex high in-situ stress conditions, how to achieve the ideal rock blasting effect through effective methods is often a difficult point of blasting operations. This paper …
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Wet Abrasive Blasting: An Overview of Surface …
Figure 2. Halo nozzles surround the abrasive blast with a curtain of water, dampening dust after impact. With water introduced into the blast stream at the nozzle, the abrasive stream velocity is reduced before it impacts the …
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Research on the damage characteristics of rock masses …
Boundary conditions. To prevent the effect of reflected stress at the free surface on the blasting effect, it is crucial to utilize a transmissive flexible boundary.
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Numerical study on the dynamic fragmentation of rock …
For the blasting excavation of deep-buried tunnel, the blasthole parameters obtained by the improved tensile and compressive strength criteria can ameliorate the under-excavation phenomenon caused by in-situ stress and enhance the blasting quality. ... The new free surface may change the minimum burden of the latter detonated blastholes and ...
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Numerical Simulation and Field Monitoring of Blasting …
There have been ever more in-situ tunnel extension projects due to the growing demand for transportation. The traditional blast scheme requires a large quantity of explosive and the vibration effect is hard to control. In order to reduce explosive consumption and the vibration effect, an optimized non-cut blast scheme was proposed and applied to the in-situ expansion of …
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Effect of in-situ stresses on fracturing performance of …
free surface (Figure 1). As the explosive source can be considered as a point explosive, the resistance line is approximately equal to the hole depth in this test. In order to study the influence of in-situ stress ... blasting under different length of resistance lines. Then a 3D theoretical model considering stress ...
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Study of presplit blasting under high in-situ stress
Semantic Scholar extracted view of "Study of presplit blasting under high in-situ stress" by Xu-dong Li et al. ... Fracture behavior and fracture surface smoothness of rock-like model subjected to axial decoupling spherical charging. Tao Hu Xianglong Li Jianguo Wang Jun Ma Qiwen Hu Ting Zuo. Engineering, Geology.
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Experimental Study and Mechanism Analysis on the Effects
Request PDF | Experimental Study and Mechanism Analysis on the Effects of Biaxial In-Situ Stress on Hard Rock Blasting | Drill and blast method is widely applied in deep rock engineering, and the ...
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Importance of Blast Cleaning Steel Before Painting, Coating …
To ensure the integrity of steel and other metals, a coating or a lining should be applied to protect the surfaces from corrosion. To ensure the success of these processes (and thereby increasing the durability of the coating or lining), the steel substrate should first undergo surface preparation to remove contaminants and create suitable conditions.
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Research on the damage characteristics of rock masses …
To prevent the effect of reflected stress at the free surface on the blasting effect, it is crucial to utilize a transmissive flexible boundary. For this purpose scholars have proposed the dispersion
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The effect of in-situ stress on blast-induced rock fracture …
In this study, a single-hole blasting model based on the open FDEM suite, OpenFDEM (https://), is built to uncover the mechanism of blast-induced fracture propagation and damage zone under high in-situ stress, addressing the challenges of over-excavation and under-excavation in deep tunnel blasting excavation.The effects of …
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(PDF) Surface Mine Design
In surface mining, blasting patterns have . to be properly planned to get adequate fragmentation of overburden. Open pit design is elaborated in several stages that consist of devising (planning) a .
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Effects of in-situ stresses on the fracturing of rock by blasting
In deep rock engineering, the conventional drilling and blasting method remains popular for rock excavation, and decoupled charging with various coupling mediums (e.g., air, sand, drill cuttings ...
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Rock Fragmentation Evaluation towards Blast-To-Mill …
In this approach, an innovative approach to the assessment of in-situ blasting is proposed and evaluated. This approach focuses on the acceptability of rock fragments on the …
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Effects of in-situ stress on rock cracking in presplit blasting
When the presplit blasting is applied to rock excavation at a deep level, crack-forming difficulties are encountered due to the characteristics of high geo-stress. ... By this, presplit-cracks can be taken as a protection strip, which keeps the final excavation surface (steep slope and the like) self-stable with less maintenance (Hu et al ...
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Numerical investigation into the blasting-induced damage
The blasting-induced damage in the rock is controlled by the joint persistence and the location of the rock bridges. Extensive blasting-induced cracks are generated around the blastholes and in the regions around the joint planes, because the blasting-induced stress wave reflects from the top free surface and produces more tensile stress wave.
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Crack propagation mechanism of smooth blasting holes for …
The blasting design considers conventional tunnel excavation, with a peak load of 1620 MPa, a rise time (t r) of 0.5 ms, a decay time (t d) of 4.5 ms, and a total positive pressure duration of 5 ms. The blasting time-history curve is depicted in Fig. 7.
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Study of presplit blasting under high in-situ stress
Presplit blasting is a commonly used technique for contour excavation that offers the advantages of eliminating overbreak and underbreak, minimizing damage to the remaining …
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Influence of In-Situ Stress on Cut Blasting of One-Step …
Due to different tensile and compressive properties of rock material, the corresponding tensile and compressive damage evolution show major differences. To investigate the tensile and compressive damage evolution in deep cut blasting with different in-situ stresses, an improved Holmquist-Johnson-Cook (HJC) material model considers the tensile and …
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(PDF) Effect of In-Situ Block Size and Rock Properties
In any surface mine, blasting operation plays a vital . role. In surface mining where blasting is used for . excavation, the overall cost effectiveness of the .
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Effects of in-situ stresses on the fracturing of rock by blasting
A lot of research has been done in the area of crack initiation and propagation due to blasting in the presence of confining stresses. Field tests conducted by Nicholls et al. [8] indicated that it is much easier to presplit in the direction of the maximum in situ compressive stress than at any angle to this direction. Blast-induced dynamic fracture tests with additional …
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Numerical study on rock blasting assisted by in-situ stress
Drill and blast method is widely applied in deep rock engineering, and the in-situ stress poses a great challenge to blasting excavation. The failure mechanism of rock under coupled dynamic and ...
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Analysis of damage mechanisms and optimization of cut blasting design
Many researchers have investigated the damage evolution mechanisms of rock under blasting loads (Deng et al., 2014, Li et al., 2013, Li et al., 2014, Mitelman and Elmo, 2016, Zhu et al., 2010).However, little work has been done on such mechanisms for deep rock masses under the cut blasting method (Bäckblom and Martin, 1999, Chen et al., 2007, Cunningham …
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Abrasive Blasting with Post-Process and In-Situ …
Abrasive blasting is a common process for cleaning or roughening the surface of a material prior to the application of a coating. Although the process has been in practice for over 100 years, …
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Prediction of Induced Ground Vibration at the Surface Due to Blasting
The uncontrollable parameters are geological discontinuities, insitu stresses, ground condition, surface topography etc. . Over the years, researchers have proposed various empirical predictive models for predicting PPV. ... Most of the available predictor equations and soft computing techniques have been used for predicting PPV in the surface ...
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A fragmentation model for underground production blasting …
insitu. is a measure of the mean size of in situ blocks formed by the rock mass. ... analysis of SLC ring blasting data and a number of experiences from surface blasting. Currently, the breakage ...
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