CN103382817B - Coal mine bottom plate anchoring anti-blocking drill rod - Google Patents

Abstract

The invention discloses an anchoring anti-blocking drill rod for a coal mine bottom plate, which comprises a hollow drill rod, a hollow sleeve, a threaded joint arranged at the end of the hollow drill rod, a prismatic wrench clamping groove arranged on the outer surface of the hollow drill rod and positioned between a front end threaded joint and a tail end threaded joint, a spiral connecting line arranged between the hollow sleeve and the hollow drill rod, and a waterproof slot arranged at the tail end of the hollow sleeve. The equipment can drill the coal mine bottom plate and can also realize simultaneous drilling, cleaning and pollution discharge. The anti-blocking device is simple in structure, strong in adaptability, easy to operate, good in anti-blocking effect and wide in practicability.

Description

A coal mine bottom plate anchoring anti-blocking drill pipe

technical field

The invention relates to the technical field of floor anchoring equipment, in particular to a coal mine floor anchoring drill pipe for fast and clean construction of anti-blocking.

Background technique

With the rapid development of my country's economic construction, the demand for energy is huge. Coal resources, as the main source of energy supply in my country, will be difficult to change for a long time in the future, resulting in the continuous development of the coal industry in the direction of mechanization and automation. In most coal mines in my country, due to the nature of coal rock, burial depth, ground stress and other reasons, the floor of the roadway is severely damaged, which affects the safety of the roadway and restricts the safe production of the mine. Therefore, the task of floor reinforcement and treatment is arduous.

At this stage, the most important method for the reinforcement and treatment of coal mine floor in my country is bolt support. At present, domestically, there are few researches and developments of anchoring equipment for coal mine roadway floors. The wet drilling method used by typical anchoring equipment is to directly inject high-pressure water provided by a fixed water source into the rotating hollow drill pipe, and squeeze the formed mud-water mixture through the gap between the drill pipe and the coal (rock) layer. Press it out. This kind of wet drilling method has some technical problems when working on the coal mine floor: first, the extruded mud-water mixture splashes around with the drill pipe and cannot be collected, which affects the normal transportation of the roadway and the walking of workers, and at the same time, the surrounding rock of the floor is soaked and softened The bottom drum problem is exacerbated; secondly, the traditional drilling method is easy to cause hole blockage in the construction of the floor, and it is extremely cumbersome to withdraw the drill and clear the hole during the drilling process, which seriously affects the construction efficiency of the floor anchorage; thirdly, the coal in the drilling hole (Rock) powder enters the roadway, exacerbating the difficulty of dust control in the roadway, and endangering the health of workers.

Therefore, developing a floor anchoring drill pipe that realizes safe, easy installation, and quick and clean construction has important use value for coal mine production at the present stage.

Contents of the invention

The object of the present invention is to provide a coal mine floor anchoring anti-blocking drill pipe with simple structure, low investment, and integration of drilling, hole cleaning and sewage discharge functions according to the problems existing in the prior art.

The coal mine floor anchoring anti-blocking drill pipe of the present invention comprises a hollow drill pipe, the hollow drill pipe is provided with a hollow casing, the front end of the hollow drill pipe is provided with a front threaded joint, and the rear end is provided with a tail threaded joint, so The hollow casing is wound with a helical connecting wire, the helical direction of the connecting wire is opposite to the working rotation direction of the drill pipe, and the connecting wire and the inner hole of the hollow drill pipe form a spiral gap; the tail of the hollow casing is provided with a water-proof plug groove.

The outer surface of the hollow drill pipe is provided with a wrench slot at the threaded joint at the front end and the threaded joint at the tail; the wrench slot is prismatic or square.

Beneficial effects: due to the adoption of the above-mentioned technical scheme, the present invention can not only efficiently drill the bottom plate of the coal mine, but also realize drilling, cleaning and sewage discharge at the same time. When the drill pipe is working, the clean water can be pressurized, and the coal (rock) powder at the end of the drill hole can be washed and cleaned by the pressurized clean water, and the sewage at the end can be pumped out through the hollow casing for subsequent centralized treatment. This equipment effectively guarantees the anti-blocking effect of the drill pipe anchored in the coal mine floor. It solves the problem that the traditional drilling method is easy to cause hole blocking in the floor construction, saves the extremely cumbersome work procedures such as back drilling and cleaning holes during the drilling process, and greatly improves the construction efficiency of floor anchoring. The utility model has the advantages of simple structure, strong adaptability, easy operation and wide practicability.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic diagram of the structure of the hollow casing.

In the figure: 1-hollow drill pipe; 2-hollow casing; 3-wrench slot; 4-connecting line; 5-front threaded joint;

detailed description

An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

As shown in Fig. 1 and Fig. 2, the coal mine floor anchoring anti-blocking drill pipe of the present invention is mainly composed of a hollow drill pipe 1 and a hollow casing 2. The hollow casing 2 is arranged in the hollow drill pipe 1, and the hollow drill pipe 1 The front end is provided with a front threaded joint 5, and the rear end is provided with a tail threaded joint 6. The outer surface of the hollow drill pipe 1 is located at the front end threaded joint 5 and the tail threaded joint 6. Prismatic or square. The hollow casing 2 is wound with a helical connecting wire 4, the helical direction of the connecting wire 4 is opposite to the working rotation direction of the drill pipe, and the connecting wire 4 forms a spiral gap with the inner hole of the hollow drill pipe 1; the hollow casing 2 tails are provided with water-proof slot 7.

Working process: After the drill pipe is connected with the drill rig and the drill bit, insert the hollow casing 2 into the water-proof slot 7, and hold the wrench slot 3 with a wrench to tighten the drill pipe, so as to realize the end-to-end connection of the drill pipe and lengthen the drill pipe. The drilling rig drives the drill pipe to rotate through the threaded joint 6 at the tail to carry out the drilling work. At the same time, the pressurized clean water enters the drill pipe through the cavity between the hollow drill pipe 1 and the hollow casing 2, and is transported to the drill bit along with the spiral connecting line 4 between the hollow drill pipe 1 and the hollow casing 2 to clean the drill pipe. hole, the helical connecting line 4 has a good pressurized water guiding effect and the effect of fixing the hollow casing 2; the hollow casing 2 is a sewage channel, and during the drilling and cleaning process, the sewage is discharged through the sewage pumping device in the drilling rig. The drill bit is sucked into the hollow casing 2 of the anti-blocking drill pipe anchored on the coal mine floor, thereby realizing the discharge of sewage. This equipment solves the problem that the traditional drilling method is easy to cause hole blockage in the floor construction, saves the extremely cumbersome work procedures such as drilling back and cleaning holes during the drilling process, and realizes drilling, cleaning, and sewage discharge processes at the same time.

Claims (3)

1. A coal mine floor anchoring anti-blocking drill pipe, including a hollow drill pipe (1), a hollow casing (2) is provided inside the hollow drill pipe (1), and a front threaded joint ( 5), the rear end is provided with a tail threaded joint (6), which is characterized in that: the hollow casing (2) is wound with a helical connecting wire (4), and the helical direction of the connecting wire (4) is the same as that of the drill The rotation direction of the rod is opposite, and the connecting wire (4) forms a spiral gap with the inner hole of the hollow drill pipe (1); the tail of the hollow casing (2) is provided with a water-proof slot (7). 2. The coal mine floor anchoring anti-blocking drill pipe according to claim 1, characterized in that: the outer surface of the hollow drill pipe (1) is located at the front threaded joint (5) and the tail threaded joint (6). Wrench slot (3). 3. The coal mine floor anchoring and anti-blocking drill pipe according to claim 2, characterized in that: the wrench slot (3) is prismatic or square.