ارزیابی ریسک گازخیزی معدن مکانیزه زغال‏سنگ طبس با روش‌ کریجینگ شاخص چندگانه

نوع مقاله : علمی - پژوهشی

نویسندگان

1 دانشجو

2 عضو هیئت علمی

3 عضو هیات علمی

چکیده

این تحقیق برای پیش‎بینی میزان گازخیزی لایه زغال‏ و ارزیابی ریسک سوانح ناشی از آن در معدن مکانیزه زغال‏سنگ طبس به کمک تخمینگر زمین‎آماری کریجینگ شاخص چندگانه و بر اساس داده‏های برداشت‌شده در خصوص گازخیزی لایه زغال C1 از 48 حلقه گمانه انجام شد. نتایج حاصل از نقشه پیش‎بینی گازخیزی نشان داد که تقریبا 12 درصد از کل مساحت محدوده مورد مطالعه، گازخیزی کمتر از (m3/t) 5 (ریسک کم)، 11 درصد از آن گازخیزی (m3/t) 10-5 (ریسک متوسط) و 15 درصد از آن دارای گازخیزی (m3/t) 15-10 (ریسک بالا) دارد. در حالی که حدود 62 درصد از کل مساحت مورد مطالعه، گازخیزی بالای (m3/t) 15 دارد که دارای ریسک گازخیزی بسیار بالایی است، بنابراین بر اساس تجارب حاصل از پانل‏های استخراج ‌شده، در مناطق با ریسک گازخیزی پایین تا متوسط ‏می‏توان با مدیریت استخراج و اصلاح سیستم تهویه عملیات استخراج را ادامه داد، اما در مناطق با ریسک گازخیزی بالا و خیلی بالا مدیران معدن مجبور به پیاده‏سازی سیستم متان‌زدایی‌اند.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Gasification Risk Assessment of Tabas Mechanized Coal Mine Using Multiple Indicator Kriging Method

نویسندگان [English]

  • vali Safari 1
  • vahid vaziri 1
  • jafar khademi hamidi 3
1 Student
3 Faculty member
چکیده [English]

This study uses multiple indicator kriging estimator based on assayed data acquired from 48 exploration boreholes in Tabas coal mine in order to predict gas content of coal seams. Results of the estimated block models showed that approximately 12% of the total area has the gas content of less than 5 (m3/ton) (Low risk), 11% has 5-10 (m3/ton) (Medium Risk) and 15% has 10- 15 (m3/ton) (High Risk), while about 62% of total area has the gas content of more than 15(m3/ton) which is of a high risk. Therefore, according to the experiences from mined panels, in the zones with lower to median gasification risk, it is possible to keep the mining operation running with management and optimization of the ventilation system. However, in the zones with higher gasification rate, demethanization process is mandatory.

کلیدواژه‌ها [English]

  • Gas content
  • Geostatistics
  • Multiple indicator Kriging
  • Mechanized Tabas coal mine
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