کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1758373 1523050 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Estimation of active rockburst prevention effectiveness during longwall mining under disadvantageous geological and mining conditions
ترجمه فارسی عنوان
برآورد اثربخشی پیشگیری از ریزش ناگهانی سنگ فعال در طول استخراج روش استخراج جبهه کار بلند در شرایط زمین شناسی و معدنی زیان آور
کلمات کلیدی
پیشگیری از ریزش ناگهانی سنگ فعال؛ انفجار؛ اثر زمین لرزه
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
چکیده انگلیسی

Underground longwall mining of coal seams in the Upper Silesian Coal Basin is currently being carried out under increasingly difficult geological and mining conditions. Mining depth, dislocations and mining remnants are the main factors responsible for the most significant rockburst hazard, which can be minimized via the use of active and passive rockburst prevention. Active rockburst prevention in longwalls is usually based on blasting, in order to either destress local stress concentrations in the rock mass or to fracture the thick layers of strong roof rocks to prevent or minimize the impact of high energy tremors on excavations. The accurate estimation of active rockburst prevention effectiveness is particularly important when mining under disadvantageous geological and mining conditions, which are associated with high levels of this hazard. The efficiency of blasting applied for this purpose is typically evaluated from the seismic effect, which is calculated based on seismic monitoring data and the weight of the charged explosive. This method, as used previously in the Czech Republic, was adopted in the present study to analyze conditions occurring in a Polish hard coal mine in the Upper Silesian Coal Basin. Parameters of long hole destress blastings in roof rocks (torpedo blastings) from the face of the assigned longwall in coal seam no. 507 were correct a success according to the seismic effect method and corresponded to observations made in situ. The analytical method presented enables the rapid estimation of destress blasting effectiveness and could also be useful when determining appropriate active rockburst prevention.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Sustainable Mining - Volume 15, Issue 1, 2016, Pages 1–7
نویسندگان
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