Drilling and mining equipment, the production process in the body of the device, its technology development, domestic and international open-air rock drilling equipment are far ahead of underground drilling equipment, drilling equipment level of intelligence many open-air mine used Far above the underground mine . Rock drilling intelligent trend highlights With the continuous development of science and technology, the research and mining of rock drilling equipment technology in various countries around the world is gradually developing towards more intelligent, humanized, green and safe. The continuous improvement of intelligent technology has laid the foundation for the rapid development of intelligent rock drilling equipment. In recent years, digital communication technology, network technology has improved, the international mining industry increasingly began to process applications in underground mine production of digital network technology. Sweden, Canada and other countries began to develop and use a new generation of intelligent rock drilling equipment with network communication and intelligent operation functions. These equipments generally have advanced functions such as rock drilling parameter return and underground network digital network interconnection communication, and realize the equipment. Networked remote control, intelligent scheduling. The increasing intelligence of rock drilling equipment has greatly increased the production efficiency, equipment utilization and integrity of underground mines. Canadian Inco's Stobie mine, for example, using a mine tomrock company's drilling robot carry out mining drilling operations, with a TV camera surveillance work in the drilling site, the broadband image transmission to the surface control room big TV on the screen, a zoom mechanism alone would allow the operator to monitor any part of the rock drill is human, and with the remote control trolley operation drilling robot work. Production practice shows that the average rock drilling schedule per shift is 132 meters, which is 63% higher than that of traditional hydraulic drilling rigs. At the same time, the operation rate is increased by 19%. Australia's Olympic Dam copper mine, one of the world's largest underground mine in the expansion from the purchase of the two companies Atlas Copco drilling robot and put into use, drilling speeds of up to 35m / h, equipment availability 94.2%, the average device Utilization rate is 82%. Domestic R&D still has “appreciation area†The research and development of mining rock drilling technology in China started earlier, and its development has gone through the following three stages: The first stage was before the reform and opening up. The research on rock drilling equipment in China mainly used the model of joint research by many units. The overall technical performance of the equipment was basically imitation of the rock drilling equipment of the Soviet Union. The rock drilling products developed by the company were simple. Pneumatic rock drilling equipment is the mainstay. The second stage is after the reform and opening up until the end of the last century. The development of rock drilling equipment in China is based on the introduction, digestion and absorption of international advanced rock drilling equipment technology. During this period, domestic enterprises introduced a large number of foreign equipment, including CT360 and T150, which were developed with the introduction of European technology. On the basis of the introduction of equipment and technology, China has developed a variety of rock drilling rigs, which are mostly low-pressure down-the-hole drilling rigs . The third stage is this century. The research institutes in China's mining field have made independent innovation as the fundamental, and have broken through a number of key technologies for rock drilling. They have developed high-pressure submersible drilling rigs and full hydraulic drilling rigs. A fruitful exploration has been made in the intelligent technology of rock drilling equipment. Among them, the CS100D underground high-pressure annular down-the-hole drilling rig and the CSY50 full hydraulic rock drilling rig jointly developed by Changsha Mining Research Institute and Hunan Nonferrous Heavy Machinery Co., Ltd. are represented. Both types of rock drilling equipment adopt advanced CANbus. The technology realizes part of the automation work, effectively improves the rock drilling efficiency, and the highly integrated hydraulic system greatly reduces the energy consumption, representing the highest level of rock drilling equipment in underground mines in China. At present, foreign countries have made considerable achievements in the research of underground fully intelligent rock drilling equipment, and gradually put them into the practical stage. However, there is still a considerable gap between these researches and attempts and the most advanced rock drilling technology in the world. Large-scale development requires "three customs" Compared with foreign advanced intelligent rock drilling equipment, China's rock drilling equipment has the following three main problems: The first is that design considerations for safety and ease of operation need to be improved. The design of rock drilling equipment in China should adhere to the people-oriented principle, and strive to research and develop a new generation of equipment to ensure a comfortable, safe driving environment, easy operation, low labor intensity and a variety of auxiliary mechanisms. The power head and the drill stand are equipped with indicator arrows to make the connection. The position of the unloading rod is clear at a glance, the operation is quick and convenient, the work efficiency is high, and the emergency stop cable and the control sensor are installed at the connecting rod, which can prevent the occurrence and expansion of the accident in time, prevent the injury of the person and the damage of the machine, and be safe. Protective measures are in place. Secondly, there is no reasonable match between structure and parameters. China's rock drilling equipment still has problems in system matching, heat balance, oil temperature and reliability. The quality of outsourcing and outsourcing parts is difficult to guarantee, and oil leakage and oil seepage often occur, which should be fundamentally solved systematically. These problems have greatly improved the quality of rock drilling equipment in China. In addition, the lack of highly automated, intelligent and efficient rock drilling equipment is becoming one of the main constraints affecting the progress of domestic projects. Due to the increasing requirements for underground rock drilling and the short construction period required by some national key projects, high-quality intelligent rock drilling equipment that can reduce labor costs and improve labor efficiency is increasingly favored. In this regard, domestic manufacturers should develop a flexible and adaptable boom-type integrated hydraulic down-the-hole drilling rig to further develop hydraulic open-pit drilling rigs and down-the-hole drilling rigs and hydraulic drilling rigs used in mines. Extraction Non Return Valve also named as quick close Non Return Valve which installed on the pipeline of steam turbine hgih pressure cylinder exhaust or each exhaust ID to protect turbine set from load shedding or opertaion failure. 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Observation on development trend of mining rock drilling technology and equipment in China