Drilling machine tool special for opencast mining rotary drill rig and using method thereof

Abstract

The invention relates to the technical field of mine mechanical equipment, in particular to a drilling machine tool special for an opencast mining rotary drill rig and a using method thereof. The special machine tool comprises a drill rod, a fixing seat, a rotary drill rig air compressor, a pneumatic control device and a slag blocking barrel, wherein the fixing seat is provided with a base, a group of pneumatic jacks and a gland; the base is a circular flat-plate base; the group of pneumatic jacks consists of 3 to 5 pneumatic jacks; and the central hole of the base is matched with the outer diameter of the drill rod. The using method comprises the following steps of: drilling a preset hole; sleeving the drill rod into the base, the pneumatic jacks, the gland and the slag blocking barrel in turn; running the drill rod and the pneumatic jacks synchronously; after the slag blocking barrel fully enters the hole, pulling the drill rod out; and inserting another slag blocking barrel until arequired drilling depth is achieved. The invention has the advantages that: the drilling machine tool has a simple structure and high hole forming rate and is convenient to operate; and depth controlis accurate.

Description

technical field [0001] The invention relates to the technical field of mining machinery and equipment, in particular to a special tool for drilling a roller cone drill in open-pit mining and a method for using it. Background technique [0002] With the deepening of open-pit mining, the problem of groundwater has become an aspect that plagues mining, and it is becoming more and more serious. Due to the existence of water in the hole, the hole depth parameter changes, the hole is deformed, the upper hole wall is affected and collapses, and the stability of the drilling is seriously affected. In order to change this situation, the mode of setting up a slag retaining tube to retain slag is often adopted in drilling at present. The method is to first drill a hole with a depth equivalent to the height of the slag retaining cylinder, then align a slag retaining cylinder with the hole, place a steel plate on the upper end of the slag retaining cylinder, and apply pressure to the up...

AI Technical Summary

Problems solved by technology

[0003] 1) After the first slag retaining cylinder is successfully pressed in, when the second and third slag retaining cylinders are pressed down again, it is easy to dislocate between several sections, resulting in failure to apply pressure

[0004] 2) When the position of the slag retaining cylinder is misplaced, the position of the slag retaining cylinder cannot be seen due to the water in the hole. Once pressure is applied, the slag retaining cylinder will be deformed and flattened

[0005] 3) Once the slag retaining cylinder is flattened, if you continue drilling, the obtained hole depth will be inaccurate, resulting in insufficient hole depth and low hole forming rate, which not only wastes manpower and material resources, but also affects the next production link

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