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20.08.2020 04:50

Construction Of Dth Hammer With Poor Geology

DTH Hammer construction method in bad geological formations
Through practice, the following two methods have been summarized for construction in poor geological formations.

a. Circulating drilling and filling hole method

In the sand and gravel system on the left bank of Xiaowan, our bureau encountered 2# shaft, Shuibuya power station 4# diversion inclined shaft, 4# bus shaft, traffic elevator shaft, and 2# and 4# diversion shaft of Sanbanxi power station. In the geologically poor sections such as faults, cracks, karst trenches, karst troughs or weak interlayers, the phenomenon of non-return water and sludge discharge from the orifice appears to varying degrees during the drilling process. All use the method of cyclic drilling and filling into holes for processing. The specific method is to prepare cement mortar


Автор: Статус: offline kaiqiudrilling   Теги:  dth bit  dth hammer 

оценок: 0       Количество просмотров  просмотров: 17
13.08.2020 04:37

Introduction To Dth Bit Operation

1. Each time before drilling the DTH Hammer, the main and auxiliary hydraulic pumps should be started and run idling for 5-10 minutes to check whether the operation is normal. If abnormal noise and vibration are found, it cannot be started.

2. Every time the motor is connected and the oil pump is turned on to send power, attention must be paid to check the direction of rotation of the oil pump, and it is strictly forbidden to reverse the oil pump.

3. During the drilling process, clean up the debris around the drilling rig in time, especially metal objects around the pilot hole. It is necessary to check whether the parts are loose, whether the oil pipe is leaking, etc., and stop the machine immediately if the following conditions are found:

1. The oil temperature exceeds 50℃


Автор: Статус: offline kaiqiudrilling   Теги:  dth bit  dth hammer 

оценок: 0       Количество просмотров  просмотров: 22