Volumetric changes in the focal areas of seismic events corresponding to destress blasting

(دیدگاه 58 کاربر)
دسته: , تاریخ انتشار: 25 اردیبهشت 1400تعداد بازدید: 569
قیمت محصول


جزئیات بیشتر



پایگاه داده

نشریه الزویر

نوع نگارش مقاله

مقاله پژوهشی


scopus – master journals – JCR

ایمپکت فاکتور

۴٫۲۷۶ در سال ۲۰۲۰

شاخص H_index

۲۶ در سال ۲۰۲۱

شاخص SJR

۰٫۹۰۱ در سال ۲۰۲۰

شاخص Quartile (چارک)

Q1 در سال ۲۰۲۰

مدل مفهومی








قوانین استفاده

خرید محصول توسط کلیه کارت های شتاب امکان پذیر است و بلافاصله پس از خرید، لینک دانلود محصول در اختیار شما قرار خواهد گرفت و هر گونه فروش در سایت های دیگر قابل پیگیری خواهد بود.

توضیحات مختصر محصول
Volumetric changes in the focal areas of seismic events corresponding to destress blasting

دانلود رایگان مقاله

فهرست مطالب مقاله:


The typical development of total volumetric change in the focal  areas of seismic events, corresponding to destress blasting, is characterized as  an  explosive phase followed by  an  implosive phase and with alter- nating additional phases following on from that. In a few  cases, a non-typical development of volumetric change was identified, where the first phase was implosive and the second phase, explosive. This  devel- opment is mainly typical for  induced seismic events recorded during mining, not for  destress blasting. Seismic events were recorded during longwall mining in  the Czech part of  the  Upper Silesian Coal Basin, where  the  destress  blasting  technique  is   used  as   a   rockburst  prevention  active  measure. Kinematic source processes in  the focal  areas of selected seismic events were analyzed by  the seismic moment tensor inversion method, as  well as  by  studying geomechanical rock mass conditions at the localities of  the seismic events. The  main goal  of  the analysis was to attempt to identify the reasons for  non-typical development of  volumetric changes in  these cases. Volumetric changes were analyzed for  seismic events with energy greater than 104  J, recorded in  the period of  time from 1993 to 2009 (1109 events). 80% (891) of the recorded seismic events were induced seismic events that were registered during longwall mining and 20% (218) corresponded to destress blasting events. Research shows that the main reason for the non-typical development of volumetric changes in the focal  areas of seismic events is an association with destress blasting in the rock mass, which is very close to rock mass overstressing. The detonation of explosives in boreholes, which would dominate the first phase of volumetric changes, prob- ably obscured stress release in the rock mass, as manifested in the first implosion phase of the volumetric changes in  this case.

بخشی از متن مقاله:
  1. Introduction

Rockbursts in the Upper Silesian Coal Basin-USCB  (Fig. 1) have been a dangerous phenomenon for  a long  period of time [1].  The rockburst problem relates primarily to the existence of competent rocks in  the rock  mass and the irregular stress fields induced by long-term excavation. The occurrence of a critical stress field  leads to  brittle failure of not  only  the coal  but also  the adjacent rocks. Such  rockbursts are  usually the result of combined, long-term for- mations of  unfavourable stress conditions in  specific geological structures [1].  According to  their origins, two main types of rock- burst can  be distinguished in the Czech  part of the USCB: (1) rock- bursts with an  activation mechanism in  the seam (coalburst or seam rockburst), and (2) rockbursts with an activation mechanism in the overburden. While rockbursts in the coal  seam are  localised

and linked to  the stress state in  the coal  seam, rockbursts in  the overburden lead to  regional events caused by  instability in  the mined-out  heterogenic and anisotropic rock   mass [1].  Destress blasting is  used as  a  rockburst mitigation technique in  the case of the second type of rockburst.

Seismic events  corresponding  to  destress blasting as  well   as high energy induced seismic events (with energy levels more than

۱۰۴ J) were recorded during longwall mining between 1993 and

۲۰۰۹ (a  total of  ۱۱۰۹ events) and were analysed in  detail. 80% (891) of  recorded seismic events were induced seismic events registered during longwall mining and 20% (218) of the analysed events were seismic events corresponding to carrying out  destress blasting.  Based   on   analysis  of  the  development of  volumetric changes  in   focal   areas,  five   events were  identified with  non- typical development of volumetric changes and these are  the sub- ject  of  this paper. Two  events were selected for  presentation in detail. The typical development of volumetric changes in the focal areas  of  seismic  events  corresponding  to   destress  blasting  is characterised by an explosive phase followed by a phase of implo- sion  and then alternating phases of explosion and implosion after that (Fig. 2).  A few  cases were identified as  having a non-typical development of  volumetric changes, where the first   phase was implosion  which  had  been  followed  by   an   explosive phase (Fig.  ۲).  This  development is  mostly typical for  induced seismic events, recorded during mining but not  for destress blasting. These seismic events were recorded during longwall mining in the Czech part of  the USCB, where destress blasting techniques have been used as active rockburst measures for some time now [2–۶]. Kine- matic source processes in the focal  areas of selected seismic events were analyzed by  the seismic moment tensor (SMT)  inversion method, as  well  as  by  studying geomechanical rock  mass condi- tions at the localities of the seismic events. The  main goal  of this analysis was   to  attempt to  identify reasons for  the non-typical development of volumetric changes in these cases.

One of the methods developed to ensure mine safety which was used is seismic monitoring to analyse the geomechanical activity of the rock  mass. As such, non-destructive methods are  very  popular because of the large amount of information that can  be  gathered regarding   the   seismic  activity  taking   place   during   mining operations, such as  the number and energy levels of  tremors in the area. Seismic monitoring is a part of rockburst prevention in many mining regions with high level  of rockburst risk  [۷–۹]. Seis- mic moment tensor inversion (SMT) analysis as a part of evaluation of  seismic activity is  a  useful tool  for  determining focal  mecha-  nisms, especially the mine tremor focus [10–۱۴]. SMT analysis is used mainly in  global seismology in  evaluation of  earthquakes [15–۱۸]. Similar outputs of the evaluation of mining induced seis- mic  events correspond to  destress blasting have not   been pub- lished in the literature.

دانلود رایگان مقاله 

نمایش بیشتر
دیدگاه های کاربران
دیدگاهتان را با ما درمیان بگذارید
تعداد دیدگاه : 58 امتیاز کلی : 2.3 توصیه خرید : 0 نفر
بر اساس 58 خرید
  1. در تاریخ پاسخ

    what happens if you take viagra and dont need it do women take viagra viagra prices 50mg cost daily ed pill will viagra keep me hard vsavings

  2. در تاریخ پاسخ

    foods that improve male libido walgreens prescription prices medications viagra cost benefits of taking cialis daily generic cialis india sales

  3. sildenafilymirzet

    در تاریخ پاسخ

    viagra uses for men viagra comparison buy prescription drugs without doctor where to buy generic sildenafil sildenafil 20 mg tablet picture how much does cialis cost pink viagra reviews

  4. در تاریخ پاسخ

    cialis printable coupons drugs to increase libido get doctor prescription online cialis europe super viagra natural alternatives for viagra how to take viagra for best results

  5. viagraviagraushig

    در تاریخ پاسخ

    low price viagra 100mg long-term effects of viagra generic viagra 100mg cvs sildenafil citrate male libido booster at gnc

  6. در تاریخ پاسخ

    peak viagra working time best supplement for women’s libido sildenafil citrate 100mg generic viagra in thailand pharmacy without dr prescriptions zytenz in stores walmart price

  7. در تاریخ پاسخ

    brand viagra 100mg viagra 100 mg best price sildenafil prescription drug price comparison sites free samples for medical offices 2017 best weight loss pills

  8. در تاریخ پاسخ

    viagra time to kick in best diet pills that work list of walgreens pharmacists viagra online generic red pill blue pill scene the matrix amazon mobile site cvs pharmacy sildenafil

  9. در تاریخ پاسخ

    miralax dosage instructions how long is sildenafil effective how does viagra work for men viagra pills free samples for medical professionals stacking cialis with viagra how long does viagra work

  10. در تاریخ پاسخ

    what cialis dosage is best cost of cialis versus viagra how much does cialis cost at cvs buyviagraonlineny cocaine and viagra mix sildenafil citrate 200mg pills is viagra safe for seniors

  11. در تاریخ پاسخ

    walmart pharmacy prices without insurance humalog lilly savings card exten zone 3000 7 day cialis 10 cialis side effects long term viagra professional 100 mg reviews how much is cialis per pill

  12. در تاریخ پاسخ

    effects of viagra on females cheap online vigora 100 where can i buy cialis online 5 mg cialis will viagra work on women obtain a prescription online

  13. در تاریخ پاسخ

    prescription drug comparison chart cialis generic availability schedule cialis for women trulicity pen disposal 25 coupon for new prescription

  14. در تاریخ پاسخ

    male enhancement products that work cialis 20mg for sale pharmacies that accept medi cal where can you buy cialis bear weight or bare weight the red pill free online does walmart pharmacy accept medicaid

  15. در تاریخ پاسخ

    viagra sales little blue pills drugs side effects of viagra for women cheap generic viagra does cvs have generic viagra cocaine and viagra interaction drugs that increase libido

  16. در تاریخ پاسخ

    purple viagra pills 100 mg what mg does cialis come in otc viagra herbal viagra alternative blue pill cialis patent expiration month and year drugs to increase male libido

  17. در تاریخ پاسخ

    what is better cialis or viagra best otc weight loss products viagra philippines generic viagra online identify business by phone number watermelon and lemon water printable coupon contrave

  18. در تاریخ پاسخ

    why viagra so expensive marlboro class action settlement can you take viagra with lisinopril how to buy cialis cheap cialis 100 mg strength over counter viagra in walgreen

  19. در تاریخ پاسخ

    viagra generic for sale tadalafil india pharmacy buy generic viagra qwikmeds vitamins viagra official site

  20. در تاریخ پاسخ

    nugenix viagra samples by mail order viagra on line levitra professional 20 mg reviews viagra vs viagra pro

  21. در تاریخ پاسخ

    does medicare cover viagra or cialis what does flomax actually do ingredients in cialis 100mg sildenafil 30 tablets price can females take viagra best natural testosterone for men super p force online

  22. در تاریخ پاسخ

    cost of fda approval process buy trulicity from canada walmart pharmacy prices for viagra cialis 10 mg lyrica manufacturer coupon what dosage of viagra sildenafil 20 mg tablet dosage

  23. در تاریخ پاسخ

    protein in pill form sexual side effects of metformin energy vitamins viagra prescription viagra prices walmart contrave diet pill buying online first time viagra user

  24. در تاریخ پاسخ

    pink images natural alternative to viagra or cialis viagra price same mechanism of action how much is belviq lyrica coupons

  25. در تاریخ پاسخ

    cvs caremark prescription refills medications associated with erectile dysfunction where can i buy cialis cheap walmart promo codes 20% off pink ladies images

  26. در تاریخ پاسخ

    how much is a viagra pill cialis dosage recommendations red male enhancement pills cheapest viagra online cvs competitor crossword pfizer vgr 100 effects

  27. در تاریخ پاسخ

    viagra without a doctor prescription not scam pot and viagra interaction real viagra pills sildenafil prices at walgreens zytenz in stores walgreens xanax and viagra interaction

  28. در تاریخ پاسخ

    cost of cialis 20 mg tablets non fda approved indications sildenafil for sale uk zyrtec samples cialis versus viagra dosage

  29. در تاریخ پاسخ

    best prescription savings card viagra warnings best price cialis 5mg canadian online pharmacy sildenafil 10 mg diazepam and alcohol goodrx drug coupons

  30. در تاریخ پاسخ

    how much does tadalafil cost lantus coupons printable $25 cvs prescription coupon printable generic cialis india is viagra sold over counter medications for erectile dysfunction how long will viagra keep

  31. در تاریخ پاسخ

    sildenafil 20 mg cost walmart how to prevent migraine headaches generic 5mg cialis best price generic viagra in the usa how to take cialis for best results viagra without a doctor prescription walmart

  32. در تاریخ پاسخ

    what does viagra do for women pink leather jacket chemical modes of action blue 100 generic viagra how much does trulicity cost generic viagra usa to usa male enhancement pills walmart

  33. در تاریخ پاسخ

    viagra directions taking best herbs for libido men aleve pill and viagra small blue pill for prostate brand name viagra no generic

  34. در تاریخ پاسخ

    cialis bodybuilding new fda approved drugs is cialis dangerous viagra 100mg 1 tablet price in india extenze reviews walmart bottled water ph levels

  35. در تاریخ پاسخ

    cost of drug approval sildenafil for heart disease cialis tablets tadalafil generic best prices fda diet pills new tumor drug

  36. در تاریخ پاسخ

    does cvs take competitors coupons cialis 5 mg tablet coupon tadalafil side effects viagra before and after photos belviq savings card activation world pharmacy india

  37. در تاریخ پاسخ

    ۲۵ mg viagra price tadalafil 60 mg generic india coupon viagra best buy free shipping male enhancement pills from china little green pills for anxiety natural forms of viagra

  38. در تاریخ پاسخ

    top 5 male enhancement products purple viagra pill generic 400 mg viagra sildenafil amazon cvs price for viagra 100mg viagra vs generic viagra reviews fda approval dates for drugs

  39. در تاریخ پاسخ

    cialis 20 mg cialis teva generic where to purchase zytenz sildenafil citrate 100mg walmart food prices lookup drug interactions with penicillin

  40. در تاریخ پاسخ

    sildenafil tab 20mg over the counter female libido enhancer cheap generic viagra online does female viagra work what is grapefruit for

  41. در تاریخ پاسخ

    generic viagra vs real gold rx card food increase libido erectile viagra online lady viagra generic viagra in usa store female libido supplements

  42. در تاریخ پاسخ

    brand cialis vs generic cialis viagra quick delivery purchase viagra online real viagra without a doctor prescription what mg does cialis come in

  43. در تاریخ پاسخ

    blue triangle pill 100 what is the drug called pink viagra online v medical online store pharmacy side effects of sildenafil 20 mg

  44. در تاریخ پاسخ

    beyond the blue pill reviews pfizer viagra coupons from pfizer how to take viagra for best results canadian generic viagra walmart tadalafil prices without insurance difference between viagra and sildenafil top 10 male enhancement herbs

  45. در تاریخ پاسخ

    doctors online who write prescriptions did neo take the red or blue gnc products with viagra effect generic viagra online canadian pharmacy how to take 20 mg cialis drugs that decrease libido difference between viagra and cialis

  46. در تاریخ پاسخ

    best libido herbal supplements for men find cell phone owner name all natural viagra replacement is mexican cialis safe protein capsules for elderly vigorexin at walgreens

  47. در تاریخ پاسخ

    walgreens erectile dysfunction pills best time to take cialis cost of viagra per pill best price 100mg viagra new weight loss medication belviq how to take viagra for maximum effect

  48. در تاریخ پاسخ

    generic viagra without an rx what causes low libido in men viagra no doctor prescription stopping flomax cold turkey generic viagra sale

  49. در تاریخ پاسخ

    erectile dysfunction remedies black cialis 800 mg best prices recommended dosage of vitamin e for men cheap viagra plavix lawsuit settlement amounts india pharmacy viagra

  50. در تاریخ پاسخ

    funny viagra label humalog savings card viagra en ligne generic sildenafil citrate vs viagra what doctor can prescribe viagra

  51. در تاریخ پاسخ

    ed trial pack usa aquaphor samples for healthcare professionals buying viagra generic viagra at costco cheap vigora 100 red tablets

  52. در تاریخ پاسخ

    ed pills that work price of viagra in china viagra dosage generic viagra 100mg sildenafil walgreens free 4×6 prints

  53. در تاریخ پاسخ

    flomax side effects abnormal ejaculation how long for cialis to take effect does viagra work for men herbal viagra ed pills that work better than viagra cost of viagra in philippines

  54. در تاریخ پاسخ

    medicines and grapefruit avoid list how to take cialis for best results overseas pharmacies shipping to usa whats viagra new prescription weight loss pills male health

  55. در تاریخ پاسخ

    viagra strength prescription drugs online without doctor cialis vs viagra dose of viagra for men tadalafil 5mg tablets sunscreen samples for healthcare professionals

  56. در تاریخ پاسخ

    aquaphor samples for healthcare professionals pink round pill with line viagra ohne rezept natural vitamin supplements for women generic viagra cost per pill

  57. در تاریخ پاسخ

    ۳۰ day cialis boots pharmacy uk strongest viagra pill best herbal viagra fda process for drug approval new diet pill by prescription

  58. در تاریخ پاسخ

لطفا پیش از ارسال نظر، خلاصه قوانین زیر را مطالعه کنید: فارسی بنویسید و از کیبورد فارسی استفاده کنید. بهتر است از فضای خالی (Space) بیش‌از‌حدِ معمول، شکلک یا ایموجی استفاده نکنید و از کشیدن حروف یا کلمات با صفحه‌کلید بپرهیزید. نظرات خود را براساس تجربه و استفاده‌ی عملی و با دقت به نکات فنی ارسال کنید؛ بدون تعصب به محصول خاص، مزایا و معایب را بازگو کنید و بهتر است از ارسال نظرات چندکلمه‌‌ای خودداری کنید.  

دیدگاه خود را بنویسید

نشانی ایمیل شما منتشر نخواهد شد. بخش‌های موردنیاز علامت‌گذاری شده‌اند *

قیمت محصول