729 The load factor can be used to calculate the weight of the material per cubic metre/yard from …

On behalf of Alton Coal Development, LLC ("ACD"), we hereby respond to the Technical Memorandum dated March 18, 2015, wherein the Division incorrectly refuses to accept newly-acquired data and calculations of swell factor and Proctor density for backfill material at the Coal Hollow Mine.

DOTs do not use swell factors) or a result of the shrink factor(s) applied to state earthwork calculations (different DOTs use different factors depending on soil type). 3. The shrinkage and swelling factors have a wide range for soils which are typical in the southeastern United States. From the values in this research, typical ranges for general

Soil or rock from the borrow expands when dropped on the lorry or the landfill - or stockpiled. One cubic from the borrow does not translate to one cubic dump. Bulking or swell factors for some materials: Material. Density at the Borrow. 103. (kg/m3) Bulking (Swell) Factor.

COAL MINING ENGINEERING: Swell Factor. Semoga Blog Ini Dapat Sedikit Banyak Membantu Kalian Khususnya Mahasiswa Teknik Pertambangan Batubara. (Politeknik Akamigas Palembang) Salam Tambang dan Salam MATARATU. Angkatan 2012th.

The generally accepted "Swell Factor" after blasting between in-situ rock (bank density) and shot rock (loose density) is 33% given reasonable blasting. In other words 1 cubic metre of sold material "swells" to become 1.33 cubic metres when you blast it because of the voids created in it by the blasting process.

This study was conducted to evaluate the swelling properties of two bottom ash-bentonite mixtures compacted at various initial moisture contents. Results from this detailed investigation show that the swelling potential increased with the increase in bentonite content and decreased with the increase in initial moisture content.

The swell factor of materials such as sand and gravel is a variable which is dependent upon the type and compaction of the undisturbed (bank run) material. Generally speaking swell for sand and ...

swell factor crushed coal - What is the swell factor for mining sand and gravel… The swell factor of materials such as sand and gravel is a variable which is dependent upon the type and ...get price. Swelling Behavior of a Chinese Bituminous Coal at ...

coal being crushed in south africa - crusherasia.com. The swell factor of materials such as sand and gravel is a variable which is dependent upon the type and compaction of the undisturbed (bank run) material. Get More.

Swell % Load Factor: Clay - Dry 40 0.72 Clay - Wet 40 0.72 Clay and Gravel - Dry 40 0.72 Clay and Gravel - Wet 40 0.72 Coal - Anthracite 35 0.74 Coal - Bituminous 35 0.74 Earth - Dry 25 0.80 Earth - Wet 25 0.89 Gravel - Dry 12 0.89 Gravel - Wet 12 0.89 Gypsum 74 0.57 Hardpan 50 0.67 Limestone 67 0.60 Rock - blasted 65 0.60 Sand - Dry 12 0.89

Swell Factors for Various Soils. A cubic yard of earth measured in its natural position swells to more than a cubic yard after it is excavated. This occurs because of an increase in voids. Swell is expressed as a percentage of natural volume, for example, if 10 yd 3 in the ground becomes 13 yd 3 after excavation, the swell factor is 30%.

Assume you are using dry gravel with a swell percentage of 15% and a shrink percentage of -7%. Plug those values into the calculator and it will tell you that the compaction factor = 1.237. Multiply the 1185 cubic yards by 1.237. 1185 * 1.237 = 1465.9. To complete this job you will need 1465.9 cubic yards of this gravel in loose state volume.

The load factor can be used to calculate the weight of the material per cubic metre/yard from bank to loose state. Multiply the bank weight by the load factor to get loose weight. Example: Basalt has a bank mass density of 4950 lb/yd3 with a swell percentage of 67% A swell of 67% has a swell factor of 1.67 and a load factor of 0.599

At Callide coal mine a swell factor with now unknown origins or validity is being used. The current swell factor appears to be correct which can be seen by design being achieved however, after the annual Audit by Anglo BCO, the validity of this figure has been requested. As well as validating the swell factor…