ã€China Deep Hole Rig Trading Network】
The development of domestic bolt drilling rigs has gone through more than 30 years, and now there are leg-type electric bolt rigs, rig-type bolt rigs, outriggers and guide rail hydraulic bolt rigs, outrigger type pneumatic bolt rigs, etc. Pneumatic bolt machine manufacturers step by step into the right track.
Coal mine bolt rigs are mostly rotary type. To match the promotion of small-diameter resin bolts, the drill bit is 27-29mm.
Rotary drill bit, its structure type is mostly two wings symmetrical, two wing asymmetry and two wings reinforcement type, can be used to drill different rock selection. The drill pipe is machined from B19 (majority) or B22 (few) hexagonal hollow steels. After many years of joint research, the bolt bit and drill rod can initially meet the requirements of bolt support under certain conditions.
However, due to the development, research, and production of anchor hole drilling equipment, it is not compatible with the rapid development of bolting technology. The traditional pneumatic rock drill and coal-powered drill are widely used in construction of coal mine bolts. Special bolt hole drilling equipment, the use of foreign imports of equipment more, but due to high prices of imported equipment and spare parts supply is not timely, coal mine users want to use domestic bolt hole drilling equipment.
Recently, China's production of MQT/MQS series of pneumatic bolt drilling rigs has gradually replaced the imported gear motor type bolt drilling rigs. China's ZYX series hydraulic bolt rig in S100
The use of boring machines has made encouraging progress. Domestic piston pneumatic motor type bolt drilling rig is gradually put into the market; Australian CRAM
Double Speed ​​Chipping Pneumatic Roof Bolt Drilling Rig has established a professional maintenance company in China and made some progress in the localization of components in China. All of these are suitable for the bolt drill to further meet the needs of bolt support development. Although China's bolt drilling rigs have made great progress in terms of technology and industrialization, there are few localized bolt drilling rigs with very high reliability and excellent performance. The specifications for drilling tools matched with bolt drilling rigs are still incomplete. Most drill tools are of unstable quality and have limited rock conditions.
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