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Location: 130 km S from Nagpur, India
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The Wani area is the southwesternmost coal-bearing part of the Wardha Valley Coalfield.Wardha Valley Coalfield is located in the southeastern part of Maharashtra State. The ariel extent of this coalfield has been estimated as 4000 sq. km. The NNW-SSE axis (which corresponds to the strike of the coal bearing sedimentaries) is around 100 km long with a maximum width of about 80 kms. The likelihood of extension of this coalfield in the northnorthwestwards beneath the Deccan Trap can not be discounted. South-south eastwards continuation of Gondwana sediments of Wardha Valley Coalfield are considered to be extended in Godavari Valley Coalfield in Andhra Pradesh.This coalfield has elliptically aligned coal prospects within the Barakar Formation around the core of Talchirs, which occupies the central part of the coalfield. The eastern limits of this anticlinal structure is constituted by Konda / Bhandak blocks towards north and Wirur / Subai / Chincholi blocks towards south. The western limb is constituted by Majri / Kawadi / Kolar-Pimpri blocks toward north and Ghugus / Nakoda, Mugoli / Kolgaon-Sawangi towards south. These limbs have been further affected by numerous NNW-SSE trending faults. Depending upon the alignment of these faults vis-à-vis the strike of coal bearing sedimentaries, numerous isolates coal-prospects have been deciphered in western limit of Wardha Valley Coalfield e.g. Dhorwasa, Chargaon, Kiloni / Baranj / Manora etc. Eastern limb of Wardha Valley Coalfield appears to be less dissected by the faults than the western limb.The central part of the coalfield is occupied by the Talchirs. The Deccan Trap covers the Gondwana sediments towards the west and north. Lametas are available in patches towards north. Major part of the coalfield is covered by the Kamthi Formation. The coal bearing Barakar Formation is exposed only in the western part of the coalfield in isolated patches. The Gondwana sediments appear to continue south-south-eastwards into the Godavari Valley sediments of Andhra Pradesh.Coal seamsThe major part of Wardha Valley Coalfield is characterised by presence of one thick Composite Seam varying in thickness from 15 m to 20 m and composed mainly 2 to 3 correlatable sections i.e. Composite Top, Composite Middle and Composite Bottom. These correlative sections are separated by well defined partings.The detailed exploration in Mugoli Extension Block reveals the existence of 4 sections of Composite Seam i.e. Composite-A to D Sections and they are continuing from adjoining Mugoli/Kolgaon Swangi Block, which is located in the Northern part of the area. The above potential seam sections (roof) occur in the area in the depth range of 9.81 m (CMWMG – 54) to 159.26 m (CMWMG-35) as per data of boreholes drilled in the block.In Mugoli Extn. Block, the thickness of Composite-A section varies from 0.75 m (CMWMG – 37) to 2.72 m (CMWMG – 24), Section-B varies from 0.72 m (MWSM-1) to 4.02 m (CMWMG-20); Section –C varies from 1.31 m (CMWMG-33) to 4.26 m(CMWMG-22) and thickness of Composite-D Section varies from 7.65 m (CMWMG-38) to 11.65 m (CMWMG-21). The above seam sections are mainly composed of coal and shaly coal with thin bands of carbonaceous shale and obvious dirt bands. The coal is generally of dull rank i.e. non-coking type.Penganga OC mineStrike and Dip The general strike of the coal seam is north-south in the major part of the area with minor swing in central part of the area as determined from the floor contour plan of Composite-D Section. In the subcrop zone near boreholes CMWMG-17 & 28 the strike becomes northwest-southeast. The dip of the strata ranges from 4 ° to 7.5 ° (gradient 1 in 7.5 to 1 in 14.0) and dipping towards west and southwest direction. The eastern part of the area is generally having less gradient (1 in 14) as compare to remaining part of the block. The attitude of the seam is presented in floor contour plan.The Composite Seam, which is about 21 m to 26 m thickness including all dirt bands and parting in the present area occurs in 4 sections viz. CompositeA Section, Composite-B Section, Composite-C Section and Composite-D Section. The parting between Composite-A+B+C Sections and CompositeD Section varies from 3.54 m (CMWMG-15) to 7.06 m (MWSM-1).
