UCA Clearing 160,000 Cubic Metres of Rock at Khorog Campus Site

Date: 03 September 2013
Other languages: Русский язык |

To prepare its Khorog campus site for construction, the University of Central Asia (UCA) is clearing and crushing up to 160,000 cubic metres of rock. The cleared land will house UCA buildings and the crushed stone will be used as raw material in the construction of roads, the Khorog campus buildings and other infrastructure.  The site is located 2,100 metres above sea level and the campus will include academic, athletic and residential facilities surrounded by landscaped parks. The design and building process will employ best practices in campus design, seismic design, construction methods and environmental sustainability.

Heavy equipment and a complex network of conveyor belts are moving and transforming up to 160,000 cubic metres of rock at the Khorog campus site.

The stone removal and crushing process is time and labour-intensive and requires heavy equipment. It is controlled from an on-site operations centre and executed by a team of ten employees - the crushing plant supervisor, a head mechanic, two crushing plant operators, two crushing plant maintenance technicians, an excavator operator, a front loader operator and two truck drivers.

 “The challenge for us here is not only to clear the land of the rocks, but also to reduce the size of the rocks into storable, usable material,” explained Hofiz Mirzonabotov, Khorog Resident Project Manager, UCA Construction and Facilities Division. “This process will yield two positive results: a cleared construction site and readily available raw material for construction.”

 “The crushing process reflects UCA’s commitment to using local materials in a way that complements the unique mountain landscape within which our Khorog campus will be situated,” added Grant Robertson, UCA Director of Construction. “Transforming and using the rock we clear is a sustainable way to build in such a challenging environment.  It just makes sense.”

The rock is first cleared and transferred by the excavator onto a vibrating screen at a rate of 120 cubic metres per hour. From there, the rock is moved along nine conveyor belts through a series of screens and crushers to be reduced in size, sorted and cleaned. Rock that is up to 500 millimetres (mm) in diametre is first reduced to about half its size, and then crushed and sorted into pieces 25mm in diametre and smaller.

Intizor Kholmurodov monitors the network of conveyor belts which moves the rock through a series of screens and crushers to be reduced in size, sorted and cleaned.

Two crushers are used in the process; a jaw crusher, which handles large rocks up to 500mm, and a cone crusher, which handles smaller rocks. The crushed rock is pressure-washed twice during the process to remove soil and other waste. The water is sourced from the Khorog River, and after use, debris and sediment are removed. The water is then recycled and used for watering the campus nursery, in keeping with the University’s mandate to operate sustainably.

The crushed and cleaned rock is transported to the batching plant storage area where it will be used for multiple purposes, including as base material for roads and buildings, manufacturing of concrete and general use in the construction of UCA’s Khorog campus. Once the rock clearing and crushing process is complete, UCA expects to proceed with detailed campus design and some site preparation works. 

Matob Mehrobov oversees the stone removal and crushing process from the on-site operations centre.

In line with UCA’s broad commitment to the communities surrounding its campus sites, the University is also designing a 2.5 kilometre two-lane road which will give residents of nearby Dasht village year-round access to the Dushanbe-Khorog-Murgab intercity road. The road will be built using the crushed rock from the Khorog campus site and will replace a dirt track. The new asphalt road will be a vast improvement, incorporating proper drainage and lighting and adhering to local construction codes and international best practices.

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