Fully-sealed wind power slagging gas-drainage deep well drilling system and method

Abstract

The invention discloses a fully-sealed wind power slagging gas-drainage deep well drilling system and method. The fully-sealed wind power slagging gas-drainage deep well drilling system comprises a drilling rod with inner holes, an inverted-spinning smashing dust-collection drill is arranged at the front end of the drilling rod, and the rear portion of the drilling rod is connected to a drilling machine. An orifice-sealed pipe, sealing fillers and a sealed pressing cover are arranged on the drilling rod. An air inlet portion with annular section is formed between the orifice-sealed pipe and the outer wall of the drilling rod, and the air inlet portion is connected with a movable type air compressor through a first connecting pipe. The rear end of the drilling rod is connected with a second connecting pipe through a pneumatic rotary connector, the second connecting pipe is connected with a drainage conveying pipeline slagging device, and the slagging port of the slagging device is connected with a slagging cylinder. The air outlet of the slagging cylinder is connected with a gas drainage pump through a third connecting pipe, and the gas drainage pump is connected with a gas drainage pipe. According to the fully-sealed wind power slagging gas-drainage deep well drilling system and method, pressing feeding type wind force in the outer annular space of the drilling rod and the drainage type wind force of the inner holes of the drilling rod can be utilized to discharge the coal scraps smoothly to carry out solid-gas separation, fully-sealed type wind power scrap discharge is achieved, the fact that hole-drilling operation is conducted continuously and safely is ensured, and working efficiency is improved.

Description

technical field [0001] The invention relates to a coal mine soft and outburst coal seam gas drainage drilling system and method, in particular to a coal dust and gas discharge pollution-free deep hole drilling system and method for coal mine soft and outburst coal seam fully enclosed wind slag discharge. Background technique [0002] The use of boreholes for gas drainage is one of the main methods of gas control, and it is also the basis for comprehensive utilization of gas. In high gas, coal and gas outburst mines and outburst mines mined in a single coal seam without protective seams, drilling along the bedding and pre-extracting coal seam gas is the main area outburst prevention measure in the mining face, while the depth of drilling in the coal seam is It determines the efficiency of gas extraction and the effectiveness of governance. [0003] Most of the drilling depths in the soft outburst coal seams in my country are below 100 meters. The reason is that the soft outb...

AI Technical Summary

Problems solved by technology

However, due to the large size of the above equipment, it is difficult to quickly remove, install and transport, and it is difficult to meet the needs of frequent replacement of drilling positions.

At the same time, the airflow ejected from the annular space between the drill pipe and the hole wall is still discharged into the air of the working environment after dust removal, resulting in a high concentration of gas on the working face. When encountering conditions such as high temperature, static electricity and open flames, gas may occur explosion hazard

In addition, although the special air suction drill for coal mines (201110075077.1) is equipped with multi-stage filter elements in the cavity of the drill bit, during the continuous drilling process, large particles of coal dust will soon block the filter elements, causing the drill bit to cut down the coal. Chips cannot be sucked away by the wind, so that the drill bit cannot achieve continuous drilling operations

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