Original Title: New Progress in Key Technologies for Underground Metal Mining Underground metal mine mining is a systematic project, including development, development and mining (as shown in Figure 1, underground mine mining model), each link requires blasting. Therefore, how to blast safely and efficiently is a subject for every miner to study. Fig. 2 Underground mining mode At present, metal mines are facing the key transition period of “from shallow to deep, from easy to difficult, from rich to poor”, and are facing new challenges in theory, technology and equipment. In the face of the above challenges, the research on the key technologies of underground mining in metal mines is particularly critical. At present, the key technologies of underground mining in metal mines are mainly embodied in the following five aspects: drilling and blasting technology, transportation and lifting technology, rock reinforcement technology, paste filling technology and remote control technology. Around these five key technologies, this study systematically reviews their development history and new progress, and the key technology architecture of underground mining of metal mines is shown in Figure 2. Figure 2 Key technology architecture of underground mining in metal mines 1. Rock drilling and blasting technology Rock drilling and blasting technology is an important technology in the process of metal mining, and it is also a weak link in the long-term development of metal mining. Therefore, it is very important to continuously improve the efficiency of drilling and blasting for the safe and efficient mining of metal mines. At present, rock drilling and blasting technology is still the main means of underground mining, from the initial manual rock drilling to pneumatic rock drill, hydraulic rock drill, drilling jumbo (rotary drill, down-the-hole drill), and even the present rock drilling robot, rock drilling technology has gradually developed from mechanization to automation, intelligence and environmental protection. Expand the full text After a long period of research, drilling equipment suitable for various conditions has been developed at home and abroad. In recent years, with the improvement of drilling equipment, the United States, Canada and other countries have introduced open-pit drilling and blasting technology in underground mining, and medium-length hole sublevel drilling has been replaced by large-diameter stage deep hole, which has achieved good application results. For example, Sweden has developed a series of tunneling drilling jumbos, which have the advantages of high drilling efficiency, safe operation and low pollution; China has independently developed a set of drilling jumbos. The fully computerized three-arm rock drilling jumbo, which integrates drilling and charging operations, has the advantages of simple operation, high safety factor and low construction cost. These equipments ensure the quality and efficiency of rock drilling, reduce labor intensity and operation risks, and achieve a new level of automation, intelligence and environmental protection. At the same time,dhd drill bit, due to the different conditions of underground mining and the different application conditions of roadway excavation and mining operations, the blasting methods commonly used in traditional underground mines are diversified, such as millisecond blasting, extrusion blasting and smooth blasting, which improve the blasting quality to a certain extent. With the development of blasting technology, the traditional blasting technology is gradually developing towards precision blasting, green blasting and intelligent blasting. The mine precise blasting system is constructed mainly through the fine design of hole pattern parameters, the theoretical study of blasting energy consumption and the simulation of blasting scheme. The green blasting mainly uses new incendiary agents instead of explosives. ? No blasting gas is generated, which greatly improves the underground air environment and realizes underground green blasting; intelligent blasting is mainly designed by blasting intelligence. Intelligent equipment, intelligent prediction of blasting vibration and automatic identification of residual holes constitute an intelligent blasting system to realize the intellectualization of blasting technology. In the new era of technological progress ssure control; The physical rock breaking technology of thermal crushing overcomes the limitation of rock breaking by mechanical energy alone, does not produce dust and sparks, and greatly improves the working environment. However,mining dth bit, due to the problems of high energy consumption, high cost and serious wear and tear of props, it has not yet been popularized in China. At the same time, at this stage, China started late in the research and development of information technology and artificial intelligence technology, and the related core technologies of intellectualization are still mainly dependent on foreign countries. Therefore, at present, continuous mining has not been really realized in hard rock mines in China. 2. Transportation and lifting technology Transportation and lifting system plays an extremely important role in the production of undergrou in deep mining, the vast majority of mines use rail transport, belt conveyor or trackless equipment to carry out multi-level shaft lifting. For example, in TauTona Gold Mine in South Africa, dth rock bit ,fastest dth hammer, a three-stage shaft lifting method is used, and then the transfer between shafts is carried out by belt or trackless equipment. Although the traditional open belt conveyor system has a simtrata reinforcement technology Metal mines are mainly aimed at reinforcing weaod, the detection result is closer to the reality. The common basic theory of each process of metal ore paste filling is metal ore paste rheology, which takes paste rheof mining system, so as to realize the functions of automatic sensing and analysis, unmanned operation, remote allocation,dth button bits, automatic early warning and remote decision-making. Break through the key technology of intelligent mining of underground metal mines, improve the market competitiveness of mining enterprises and mining equipment manufacturing enterprises in China, and provide technical support for China to move from a big mining country to a powerful mining country. Return to Sohu to see more Responsible Editor:. wt-dthtools.com
New Progress in Key
