In order to make the ZDY series drilling rigs and CMS series drilling rigs have the function of mechanical hole expansion, our company has designed a more convenient mobile hole making hydraulic device, which includes a mechanical coal seam hole making pressure relief device and a matching core rod jacking mechanical hole expander, core rod jacking hole making drill rod, and hydraulic thruster, which realizes rapid replacement in the tunnel, so that ordinary drilling rigs have the function of me
Mechanical coal seam hole making pressure relief device
In order to make the ZDY series drilling rigs and CMS series drilling rigs have the function of mechanical hole expansion, our company has designed a more convenient mobile hole making hydraulic device, which includes a mechanical coal seam hole making pressure relief device and a matching core rod jacking mechanical hole expander, core rod jacking hole making drill rod, and hydraulic thruster, which realizes rapid replacement in the tunnel, so that ordinary drilling rigs have the function of mechanical hole expansion operation.
Product advantages
●Easy to install - can quickly adapt to various types of drilling rigs, without the need to lift the drilling rig.
●Easy to transport - can use the existing guide rails in the tunnel, and can be quickly pulled to the working face where the drilling rig is located.
●Independent control - has an independent power and control system, does not affect the original performance of the drilling rig.
Our company's latest developed mechanical coal seam cavern pressure relief device and fully hydraulic crawler mechanical cavern equipment (patent number: ZL202010922779.8, patent number: ZL202010890623.6,) are widely used in the expansion and cavern construction of high-gas coal seams and through-layer drilling holes, and the cavern construction for impact ground pressure control, especially in the field of gas prevention and control of cavern bottom engineering drilling in high-gas soft coal seams.
Mechanical cavern expansion series products
This product adopts hydraulic mechanical control, does not require a high-pressure pump station, has a high porosity, can effectively reduce the hidden dangers of mine disasters, can adapt to complex geological conditions, reduce equipment investment, and improve construction efficiency. It is simple to use, easy to operate, safe and reliable, and can better ensure the safety and stability of coal mine production. It has become the preferred product for coal mine gas extraction, hole expansion and permeability enhancement.
Working Principle
The mechanical hole-making and hole-reaming series products use hydraulic thrusters to provide axial thrust, and achieve long-distance high thrust output through the mutual pushing of the core rods of the hole-making drill rods. The blades are actively opened at the target position of the hole-making, and the blades are automatically closed after the hole-making is completed. The core rod jacking mechanical hole reamer adopts high-strength radial cutting blades to highly adapt to the hole-making construction under complex geological conditions. The operation process is controlled by the machine outside the hole and has high reliability.
After a large number of engineering construction verifications, in the hole-making construction of soft coal seams, low-pressure water or compressed air is used to discharge slag in the hole, which avoids irregular damage to the hole wall caused by high-pressure water. It has the advantages of protecting the hole and preventing the hole from collapsing. The regularity of the drilling hole is good, thereby maintaining the long-term effective extraction of gas, improving the gas extraction efficiency, and shortening the gas extraction period. During the test process in major mining areas, the extraction concentration of this product was increased by 4.5% compared with the carbon dioxide fracturing technology. Compared with the high-pressure hydraulic punching hole-making technology, it uses less water and has low disturbance to the stability of the coal seam, which greatly reduces the phenomenon of drilling tool failure caused by the drill stuck in the hole collapse. The latest mechanical hole-making equipment developed and manufactured by our company has irreplaceable performance advantages over the traditional hole-making equipment technology circulating on the market.
Main features of the series of products
1. Hydraulic mechanical control is adopted, and no high-pressure pump station is required, which greatly reduces equipment investment and high-pressure safety risks;
2. Mechanical control outside the hole-making hole, visual active control of the opening and closing of the blade wing, greatly reducing the risk of damage to the tool in the coal-rock alternating structure;
3. Wide range of use, can meet the requirements of large-diameter hole-making in up-inclined holes, horizontal holes, down-inclined holes within -15 degrees, medium-hard and soft coal seams within F4, and small-diameter hole-making in soft rock layers within F8;
4. Mechanical hole-making technology, with low water consumption and low disturbance to the stability of the coal seam, significantly improves the hole-making rate of hole-making, and the efficiency is more than twice that of high-pressure hydraulic hole-making.
