Transactions . ... 1 0 2Grey metal, with iron-stone girdles ... 1 5 3Grey post, with metal partings and whin girdles 2 3 0 Dark grey metal, with ironstone girdles ... 1 2 0White post, with whin girdles ... ... 0 5 6 Grey post, with scaling metal partings and whin 3 4 2 Black metal 0 0 4 BENSHAM SEAM— Ft. 00 2\ 10 0 13 2 5 4 14 0 3 8 0 3 0 5 2 0 220 0 2 The whole of the experiments were made in the No. 1 Holder HouseDistrict, Bensham Seam, at a point about 3,000 yards south-east from theshaft, about 440 yards from some old workings, and 594 ysirds from thenearest goaf, the dip of the strat
Transactions . ... 1 0 2Grey metal, with iron-stone girdles ... 1 5 3Grey post, with metal partings and whin girdles 2 3 0 Dark grey metal, with ironstone girdles ... 1 2 0White post, with whin girdles ... ... 0 5 6 Grey post, with scaling metal partings and whin 3 4 2 Black metal 0 0 4 BENSHAM SEAM— Ft. 00 2\ 10 0 13 2 5 4 14 0 3 8 0 3 0 5 2 0 220 0 2 The whole of the experiments were made in the No. 1 Holder HouseDistrict, Bensham Seam, at a point about 3,000 yards south-east from theshaft, about 440 yards from some old workings, and 594 ysirds from thenearest goaf, the dip of the strata being towards the south-west. The roof is good, of blue metal, and the thill is also of blue metal. The coal is bright and bituminous, and is used for household cleavage is well defined and the texture open. No coal is worked in any seam either above or below. The specific gravity is 1*21. GAS IX THE SOLID COAL.—HARTOX XO. 1. 213 Plan No. 5, showing the workings in No. 1 Holder House District. EXPERIMENT I. On June 1st, 1880, No. 1 Hole was bored in the solid coal at the faceof a winning (narrow board). See Plan No. 5, and Section No. hole came in contact with the roof. Section No. 12. 214 EXPERIMENTS SHOWING THE PRESSURE OF CONDITIONS. The length of the borehole was The diameter of „ The diameter of pipe fixed in the Gas space Hole at ris;ht angles to the cleat. Cover—depth of hole from surface Distance of hole from shaft about Description of gauge used Ft. 16 In. 9 • •• •«• o 1,215 feet. 3,000 yards. Schaeffer and Budenbergs. The holes were stemmed in exactly the same manner as those atBoldon Colliery, with wooden plugs, oakum, and cement. This hole took 5 hours to bore and 3 hours 15 minutes to stem. Elevation No. 4, showing the position of Nos. 1 and 2 Holes in thenarrow board. S-S-> - V- S - N°2Uc T h Pressure ^n ^une 6t^ at 330 A,M- one °* Schaeffer and Budenbergs 500 lb. of Gas. pressure gauges was put on. RESULTS.
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Keywords: ., bookcentury1800, booksubjectmechan, booksubjectmineralindustries
