This article aiming at the lack of research on influence rock clamp production cutting blasting under high in-situ stress conditions and damage criteria for RHT constitution in numerical simulation. Combined with critical criterion embedded function constitution, determining constitutive was studied, mechanical parameters Metamorphic sodium lava were substituted to obtain threshold The smooth p...

For San-Xin gold and copper mine, deep blasting large block rate is high resulting in difficulty transporting the ore out; secondary not only increases costs but more likely to cause top bottom plate of underground become loose causing safety hazards. Based on research background Sanxin hole parameters were determined by single-hole, variable-hole pitch, oblique tests, further using inversion m...

Bunch-holes blasting (several blastholes arranged in a bunch with short spacing and detonated simultaneously to form large common crater) is typically used underground mines increase efficiency under single free surface. Considering the low accuracy of pyrotechnic detonators, which are commonly Chinese mines, bunch-holes same nominal times actually short-delay blasting, actual delay intervals i...

SmartTag is a radio frequency identifi cation (RFID) based technology designed to allow tracking of ore from its source through blasting, run-of-mine (ROM) pads, crushers, intermediate stockpiles and fi nally into the concentrator. This paper presents current developments and the future direction of the SmartTagTM ore tracking system, as well as presenting some case studies. Successful applicat...

In this study, micro fluid channels are machined on fused silica glass via powder blasting, a mechanical etching process, and the machining characteristics of the channels are experimentally evaluated. In the process, material removal is performed by the collision of micro abrasives injected by highly compressed air on to the target surface. This approach can be characterized as an integration ...

OBJECTIVE The aim of periodontal therapy is the healing of periodontal inflammation; the protection of the attachment and the alveolar bone; and the regeneration of the periodontal structures. In the therapy of periodontitis, supra- and subgingival scaling and root planing plays a main role. The procedure described combines perfect root cleaning without scaling and root planing and minimal inva...

The accuracy of measurement of the thickness of uniform thin films on solid substrates by null ellipsometry is severely limited when the substrate is rough. It is impossible to separate these two effects experimentally with the null ellipsometer, and there is no theoretical basis or generally used model available to separate these effects. Thus, a dual rotating-compensator Mueller matrix ellips...

In order to reduce the blasting dust concentration in tunnel during drilling and blasting, accelerate excavation process, improve working environment for construction workers, a three-dimensional geometric model of transport was established based on gas-solid two-phase flow using DesginModeler software, discrete phase (DPM) FLUENT software used simulate variation distribution particle size at d...