DETERMINATION OF METHANE DESORPTION ZONE FOR THE DESIGN OF A DRAINAGE BOREHOLE PATTERN (CASE STUDY: E4 PANEL OF THE TABAS MECHANIZED COAL MINE, IRAN)
Underground coal mining is known as one of the major sources of methane emissions which mainly occurs after underground coal extraction. Rock strata in-situ methane can potentially be the most significant hazard in coal mining operations. To prevent or minimize the risks of methane emissions, methan...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
University of Zagreb
2021-01-01
|
| Series: | Rudarsko-geološko-naftni Zbornik |
| Subjects: | |
| Online Access: | https://hrcak.srce.hr/file/364768 |
| _version_ | 1827161816263819264 |
|---|---|
| author | Ali Hosseini Mehdi Najafi |
| author_facet | Ali Hosseini Mehdi Najafi |
| author_sort | Ali Hosseini |
| collection | DOAJ |
| description | Underground coal mining is known as one of the major sources of methane emissions which mainly occurs after underground coal extraction. Rock strata in-situ methane can potentially be the most significant hazard in coal mining operations. To prevent or minimize the risks of methane emissions, methane drainage approaches have been adopted by coal mines. Rock mass methane drainage is the most efficient and effective approach toward controlling methane hazards as it prevents and reduces the frequency of methane emissions, outflows into the working area and sudden outbursts of methane and rocks. The method includes drilling boreholes from the tailgate side to the unstressed zone in the roof and floor strata above and below a working coal seam. The coal seam gas content in Tabas Parvadeh I is estimated to be about 16 m3 /t, which is relatively high. Based on exploration data, five distinct coal seams have been identified (B1, B2, C1, C2 and D) at the coal deposit and currently C1 is being worked. Considering the high value of C1 gas content and surrounding rocks, the Methane Drainage System (MDS) has been utilized for gas drainage. This paper tries to determine the desorption area which is essential and helpful for the selection of an effective drilling pattern into the adjacent coal seams. In this study, the methane drainage zone in the E4 panel of the Tabas coal mine was calculated using experimental equations and a drainage borehole pattern was determined. |
| first_indexed | 2024-03-12T07:52:14Z |
| format | Article |
| id | doaj.art-d3b2d9cd11cd47658a17c92a61ce7a1e |
| institution | Directory Open Access Journal |
| issn | 1849-0409 |
| language | English |
| last_indexed | 2025-03-21T00:34:56Z |
| publishDate | 2021-01-01 |
| publisher | University of Zagreb |
| record_format | Article |
| series | Rudarsko-geološko-naftni Zbornik |
| spelling | doaj.art-d3b2d9cd11cd47658a17c92a61ce7a1e2024-08-03T06:45:53ZengUniversity of ZagrebRudarsko-geološko-naftni Zbornik1849-04092021-01-01361617510.17794/rgn.2021.1.676DETERMINATION OF METHANE DESORPTION ZONE FOR THE DESIGN OF A DRAINAGE BOREHOLE PATTERN (CASE STUDY: E4 PANEL OF THE TABAS MECHANIZED COAL MINE, IRAN)Ali Hosseini0Mehdi Najafi1Department of Mining and Metallurgical Eng., Yazd University, Yazd, Iran; https://orcid.org/0000-0003-2870-9460Department of Mining and Metallurgical Eng., Yazd University, Safayieh, P.O. Box: 89195-741, Yazd, Iran; https://orcid.org/0000-0002-1609-3702Underground coal mining is known as one of the major sources of methane emissions which mainly occurs after underground coal extraction. Rock strata in-situ methane can potentially be the most significant hazard in coal mining operations. To prevent or minimize the risks of methane emissions, methane drainage approaches have been adopted by coal mines. Rock mass methane drainage is the most efficient and effective approach toward controlling methane hazards as it prevents and reduces the frequency of methane emissions, outflows into the working area and sudden outbursts of methane and rocks. The method includes drilling boreholes from the tailgate side to the unstressed zone in the roof and floor strata above and below a working coal seam. The coal seam gas content in Tabas Parvadeh I is estimated to be about 16 m3 /t, which is relatively high. Based on exploration data, five distinct coal seams have been identified (B1, B2, C1, C2 and D) at the coal deposit and currently C1 is being worked. Considering the high value of C1 gas content and surrounding rocks, the Methane Drainage System (MDS) has been utilized for gas drainage. This paper tries to determine the desorption area which is essential and helpful for the selection of an effective drilling pattern into the adjacent coal seams. In this study, the methane drainage zone in the E4 panel of the Tabas coal mine was calculated using experimental equations and a drainage borehole pattern was determined.https://hrcak.srce.hr/file/364768coal seammethane drainagedesorption zoneboreholelongwall miningtabas coal mine |
| spellingShingle | Ali Hosseini Mehdi Najafi DETERMINATION OF METHANE DESORPTION ZONE FOR THE DESIGN OF A DRAINAGE BOREHOLE PATTERN (CASE STUDY: E4 PANEL OF THE TABAS MECHANIZED COAL MINE, IRAN) Rudarsko-geološko-naftni Zbornik coal seam methane drainage desorption zone borehole longwall mining tabas coal mine |
| title | DETERMINATION OF METHANE DESORPTION ZONE FOR THE DESIGN OF A DRAINAGE BOREHOLE PATTERN (CASE STUDY: E4 PANEL OF THE TABAS MECHANIZED COAL MINE, IRAN) |
| title_full | DETERMINATION OF METHANE DESORPTION ZONE FOR THE DESIGN OF A DRAINAGE BOREHOLE PATTERN (CASE STUDY: E4 PANEL OF THE TABAS MECHANIZED COAL MINE, IRAN) |
| title_fullStr | DETERMINATION OF METHANE DESORPTION ZONE FOR THE DESIGN OF A DRAINAGE BOREHOLE PATTERN (CASE STUDY: E4 PANEL OF THE TABAS MECHANIZED COAL MINE, IRAN) |
| title_full_unstemmed | DETERMINATION OF METHANE DESORPTION ZONE FOR THE DESIGN OF A DRAINAGE BOREHOLE PATTERN (CASE STUDY: E4 PANEL OF THE TABAS MECHANIZED COAL MINE, IRAN) |
| title_short | DETERMINATION OF METHANE DESORPTION ZONE FOR THE DESIGN OF A DRAINAGE BOREHOLE PATTERN (CASE STUDY: E4 PANEL OF THE TABAS MECHANIZED COAL MINE, IRAN) |
| title_sort | determination of methane desorption zone for the design of a drainage borehole pattern case study e4 panel of the tabas mechanized coal mine iran |
| topic | coal seam methane drainage desorption zone borehole longwall mining tabas coal mine |
| url | https://hrcak.srce.hr/file/364768 |
| work_keys_str_mv | AT alihosseini determinationofmethanedesorptionzoneforthedesignofadrainageboreholepatterncasestudye4panelofthetabasmechanizedcoalmineiran AT mehdinajafi determinationofmethanedesorptionzoneforthedesignofadrainageboreholepatterncasestudye4panelofthetabasmechanizedcoalmineiran |