نتایج جستجو برای: mine explosion
تعداد نتایج: 40903 فیلتر نتایج به سال:
کاهش هزینه ها یکی از مهمترین پارامترهای مورد بررسی در دوران بهره برداری از معادن می باشد. عواملی مانند: میزان باطله برداری، حفاری و انفجار، بارگیری و حمل، تعمیر و نگهداری و هزینه های ناشی از رخ دادن حوادث در معادن می توانند تاثیر قابل توجهی بر میزان سوددهی معدن داشته باشند. یکی از مهم ترین فاکتور هایی که می تواند بر عوامل ذکر شده تاثیر قابل توجهی داشته باشد، دسترسی مطمین و نگهداری بهینه دیواره ...
Abstract When the output of explosion-proof lithium power supply is used in parallel, there exists problem non-uniform current between sources, so a digital current-sharing strategy and module are designed. The uses MCU unit as regulating component to monitor front-stage post-stage voltage, their feedback values circuit real time. At same time, compensation exchanged through real-time communica...
Explosion chambers are crucial to the technology used prevent coal mine gas explosions. Investigating shock wave propagation law at various tunnel cross-sections helps ensure safety. A self-built, highly explosive experimental setup was conduct empirical research on straight tubes, eight sizes of single-stage explosion chambers, and multi-stage tandem chambers. Ansys Fluent numerical simulation...
Background: On May 3, 2017, at 11:58 AM local time, an explosion occurred in the Zemestan-Yurt coal mine in Azadshahr City of Golestan Province, northern Iran, which resulted in mass casualty incident. Materials and Methods: In total, more than 126 miners were affected. Of them, 43 miners were killed, 73 other workers who helped their coworkers were also injured and taken to the hospital, and ...
<p>Combined with the reconstruction project of underground locomotive transportation system in Guqiao Coal Mine Huainan Mining Group, dissertation studies comprehensive management coal mine transportation. The accuracy ZigBee wireless positioning technology is improved through Gaussian filtering to make it applicable more complex environment. Frequency conversion control used motor circui...
Methane gas emission, accumulation, and explosion are the most important risk factors in underground coal mines. Hence, having a knowledge of methane gas emission potential in underground coal mines is of crucial importance in preventing the explosion risk, loss of life, and property, and providing miners' safety. The purpose of this work is to provide the prediction maps for the C1, C2, and B2...
Background: However, the increasing advances in technology have greatly reduced the physical presence of manpower in the workplace, but in many work environments, man is still the most important and, at the same time, the most critical element. A slightest human error due to unsafe actions in most of occupational environments, can lead to a disaster. Material and method: The current qualitativ...
Glial tumors have been heavily studied and sequenced, leading to scores of findings about altered genes. This explosion in knowledge has not been matched with clinical success, but efforts to understand the synergies between drivers of glial tumors may alleviate the situation. We present a novel molecular classification system that captures the combinatorial nature of relationships between alte...
The accident in the Rasa mines of 28 February 1940 was the greatest tragedy in the history of mining in Istria; an explosion, most likely fuellled by methane and coal dust, claimed 185 lives and injured over a hundred people. Documentation made available by the courtesy of Zdravko Hrastnik, a collector from Labin, and the archieves of the Vicenza town hospital shed some light on this tragedy an...
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