In 1886, the work is divided into four levels and three ranges: 150-180 floor, floor 180-205, 205-2

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The deposit of the Mole, located in the eastern part of the basin Brassac, consists of two parts separated by a gap formations. Is the beam is formed clusters lenticular includes the neighborhoods Grande vein, Louise and Robert Brown. The West beam consists of concentric anticlines with side branches and neighborhoods is Anticline and Grande layer. Between the fault and the anticline houses a heap of coal called South East area. The layers are quite regular both horizontally mazon and vertically mazon and usable parts susceptible to movements sometimes noticeable a slice to another. In each area, the number of branches called stations is quite variable.
In the massive Arrest layers, the number of layers is uncertain, it varies from 4 to 8 depending on the scene and geologists. Arrest The well was opened in 1838 and is down to 155 m depth. The operation has reached a horizontal development of 400 m. They continue in 1887 in the southern part of Arrest layers over 4 floors mazon between levels 150 and 260 m.
The massive size and high layer is characterized by two powerful clusters more or less regular. The large layer has a horizontal mazon section length mazon of 200 m and a width of 0-42 m. The large layer has to be a branch named layer of the roof. The wall of the large layer and a highly variable distance, is the large size that seems to disappear at a depth of 190 m. From 205 m, there are four other layers from 1.50 to 12 m thick.
The massive Robert Brown is north of the great layer. It has a NS orientation and dip of 65 . This massif is operated on six levels between 121 and 260 m depth. It includes a first floor operating above 121 m, in the middle region of the massive mazon 200 m long and 15 wide me, it is divided into two or three areas with rocky banks. In 1887 the layers Robert mazon Brown, mazon Louise and Big Vein were exhausted at 267 m above sea level, the layers of the wall and were operating Arrest or tracing at 180, 205, 230 and 260 meters.
In 1886, the work is divided into four levels and three ranges: 150-180 floor, floor 180-205, 205-230 and 230-260 floor floor [1] in the massive Great, nappy size and layer Arrest. Extracted mazon per day from 825 to 850 tons of raw coal (about 275 tonnes of salable coal) in wells 1 and 2, each well serving two floors: Floor 150 and 180 by the well 1 and the other two wells. The workforce of 320 workers including 218 at the bottom (80 drills). mazon The wells are being deepened in 1887 to 50 m in the preparation of two new floors. Well 2 of air coming from the well 1 is entered.
In 1888, the 150-180 floor is nearing completion and will be completed by year-end. Exhaustion is the well 1. The wells are dark to 295 m. The staff are very stable. Biting are paid 0.35 to dump the menu for the big f 0.60, they also receive a bonus of 0.90 per frame f and put a forward premium of 2 6-w per meter. Biting earn f 4.80 per day, the rock miners, 4.50, 3.25 the rollers, the packers 3.25, 4.50 to supervisors and laborers day 2.50 f / d.
285 The preparation stage is set in 1889. The shaft was sunk to 1 310 m, the other must also be. The production is 318 tons per day gross with 294 workers including 235 at the bottom.
In 1908 was conducted on the South and Great Vein layers on floors 180, 360 and 383 m, Robert Brown on floors 310 and 360, Grande layer on floors 180 and 385 and Louise on floors 360 and 385 m. A power station was installed near wells 1 and 2 for the resumption of the mine Barthes.
In 1932, well # 1 of the Mole was cleaned up to 510 m, so the two wells have the same depth. Great neighborhood vein 510 has been completely mazon popped, Southeast district was fully drawn at 450. The operation continues with horizontal slices taken value: South East District 418 has been completed, the main activity is grouped between levels 410 and 510. Neighborhoods operated