The drill sent for export was loaded on four railway platforms on February 15 and started its long way to the customer.
SBSH-250MNA-32 drilling rig has been manufactured according to the customer’s confirmed technical specification (the TS).
We remind you that every T
The autumn exhibition season of ITE Uzbekistan company completed with three international exhibitions “MiningWorld Uzbekistan”, “Machinery Central Asia” and “TransUzbekistan” that took place in 16-18 November, 2016. The exposition was located in two showroom
Rudgormash received visitors from PJSC “Stoylenskiy GOK” on October 25, 2016 who had come for preliminary acceptance of the drilling rig SBSH-250 that had been manufactured by that time and was being prepared for the shipment.
The drilling rig fundamentally differs from
Design documentation has been prepared. The drill is ready for serial production.
The machine serves to drill holes of 200-270mm in diameter in highly abrasive ores. The special aspect of this drill is that its drilling holes of 17,5m deep with one rod that equals the benching height of most rock sections. Thus the productivity of the drill improves greatly due to the fact that there is no necessity for the screwing and unscrewing of the drill tool. This works perfectly well for the soft and medium-hard rocks when the time of drilling often equals the auxiliary operations. To provide continuous feed travel for the long rod, a cable-polyspast feed drive from two drawworks has been used.
This type of the drive takes the axial load off the mast. The mast is of closed type with a strengthened design of the bearing pin and the mount beam of the mast swing cylinder. This gives durability and reliability provided that the feed thrust is 40 ton and the torque on the bit is 1300 kgm. The supporting unit and rotation unit are separated to prevent the rotation unit from bumps and vibrations.
The drives of the drawworks, the rotation unit and the track drive can be equipped with electric motors of alternating current with frequency regulation or with electric motors of direct current.
Upon customer’s request the drill can be supplied with the compressors of 28, 40 or 50m³/min capacity. The compressor of 50m³/min has a medium voltage (6000V) drive.
All auxiliary operations of the drill like leveling, lifting and lowering of the mast, screwing of the drill tool are carried on by the hydraulic drive.
Hydraulic drive based on the mobile Bosch Rexroth hydraulics provides highly reliable work of the drill, smoothness of operations and precision in regulation, it eliminates hydroshocks, reduces the noise and vibration.
In the hydraulic drive there is one regulated pump and its capacity is set automatically by the feedback system and depends on the speed of the performed operations which is set by the distributor with proportional control.
To keep the hydraulic system in stable temperatures of instant readiness especially in winter time the pumps are set at a minimal working capacity to pump 10-15 l per min of the power oil through the blocks of hydraulic system for keeping them warm.
The cabin has been enlarged. It has a window heater, insulation of walls, floor and ceiling. The cabin has a wooden floor with rubber covering, an air heater and an air conditioner.
There is also an anti-vibration chair, two control panels with an indicators block showing the main drilling parameters like the depth of drilling, the speed of sinking, spindle rotation frequency and etc. This simplifies the drill operation and increases comfort of the operator.
Technical characteristics of SBSH-250/311-18
Type of the drill
SBSH – rotary type of drill equipped with roller bits.
Hardness of the drilled rocks according to prof. Protodyakonov scal