Technical paper on roadway excavation in coal mine

In coal mining, roadway excavation is a very important mining link. I will share my paper on tunnel technology with you. Come and enjoy it with me.

The first paper on tunneling technology discussed the tunneling technology of coal mine roadway.

Abstract: Coal is the main energy source in China. In recent years, the demand for coal has gradually increased. In coal mining, roadway excavation is a very important mining link. When driving, the driving technology, driving equipment and the quality of relevant staff will affect the speed of roadway. In order to ensure the supply of coal, it is necessary to improve the technical level of roadway excavation. This paper expounds the domestic coal mine roadway driving technology, and puts forward some personal views on the future development trend.

[Keywords:] coal mining; Mining technology; tunnel

China Library Classification Number: TD263.2 Document Identification Code: A Document Number:1009-914x (2014)18-001.

The composition of natural resources determines the core position of coal in China's energy supply. In coal mining, a large number of tunnels need to be excavated. Roadway excavation and mining technology is the main production process in coal mine engineering, and roadway excavation technology is directly related to the level of excavation equipment. Nowadays, more and more efficient mechanical equipment is used in roadway excavation, and the supporting technology has also developed greatly. This paper expounds the domestic coal mine roadway driving technology, and puts forward some personal views on the future development trend.

1. Summary of Roadway Driving Technology

Roadway technology is the application of coal mining technology in China, which is mainly used to drive mines in coal lanes, but it occupies more places in mining lanes. There are three main ways of roadway excavation. One is the working line of cantilever roadheader and single anchor drilling rig, which is also called comprehensive coal seam tunneling. This tunnel construction method is widely used in many parts of the country. The comprehensive mechanized tunneling method adopts cantilever roadheader for tunneling. Secondly, the production lines of continuous shearer and anchor drilling machine that have been used in Inner Mongolia, China need road and cross-conversion construction excavation for roadheader construction. Then the integrated excavation of foundation pit excavation anchor rod. This construction method is only carried out in a few areas, but it is still in the testing stage, and its future application scope and influence are difficult to predict. The following will introduce the above three technologies in detail.

2. Analysis of influencing factors of coal mine roadway driving technology

2. 1 Mine roadway geological conditions and geological conditions are the main factors affecting the application of technology. The geological conditions of coal mine roadway excavation mainly include rock hardness, water inrush and gas emission, stable bedding and roof and floor conditions. Good geological conditions are the requirements of the application platform of mine roadway driving technology, and the most demanding and complicated geological conditions affect the progress of coal mine driving to varying degrees. For example, temporary support and permanent support can be set up after the roof stability of coal mine roadway is controlled and guided, which effectively improves the working efficiency of roadheader.

2.2 Roadheader With the development of modern science and technology, new tunnel boring machines have been widely used, and the work efficiency and quality have been steadily improved. Judging from the current horizontal tunnel equipment in China, although the types of equipment are relatively complete, the common problems of poor performance and high degree of automation are affecting tunnel excavation technology, which can not be ignored.

2.3 The influence of construction on the level of roadway excavation equipment; China's roadway excavation technology is relatively backward. Although, semi-coal and more advanced tools such as bolting and shotcreting, bolting and shotcreting, such as tunneling in coal and rock roadway, effectively simplify the operation process, roadway tunneling, separation and support at work and other business items, which seriously hinder the improvement of tunneling speed.

2.4 Construction Management At present, the production of China's coal mining enterprises, the imperfect organization and management of enterprise managers' construction, and long-standing scientific problems have led some enterprises to excessively pursue progress in roadway excavation, while ignoring the quality supervision procedures in the work process. It is difficult to implement the organization and management scheme related to roadway excavation in coal mine, which not only affects the technology and application effect of roadway excavation, but also has many security risks.

3. China coal mine roadway excavation technology.

3. 1 comprehensive mechanized tunneling technology of coal mine roadway

1980, China introduced two foreign models of roadheader S- 100 and AM50, and through the improvement of these two models, it greatly promoted the development process of mechanized coal mine roadway driving technology in China. At present, the annual output of tunnel boring machines in China can reach more than 65,438+0,000, with more than 20 models, which can basically meet the needs of coal production in China. In order to better meet the characteristics of coal mining in China, the advanced performance of EBJ roadheader and domestic researchers with international advanced level can be replaced by external models, and now 500 models have been put into practical production. The overall structure of this new type coal mine tunnel boring machine is compact and reasonable; The compact fuselage effectively reduces the gravity of the whole equipment, thus improving its stability; The model has strong rock breaking ability and is suitable for all kinds of roadways. The powerful driving hydraulic motor greatly improves the performance of the whole equipment and optimizes the fuselage structure; Excellent performance of tracking mechanism; Fault diagnosis and detection of mining function. The advanced model has been well applied in the whole coal mine production process, which greatly improves the coal mine tunneling efficiency.

3.2 High Efficiency Driving Technology of Continuous Shearer in Large Cross-section Coal Mine Roadway

Coal roadway driving technology and miners, as efficient mining equipment in fully mechanized mining face, can realize large-section coal and transportation business, which is suitable for rectangular underground mining and short walls of two lanes or roads, and is an effective advanced equipment to improve coal mining capacity. The internal model has experienced independent introduction and the final introduction of complete sets of continuous mining machines. However, there are no enterprises with production equipment at present. At present, several large coal enterprises such as Luneng Group mainly use continuous shearer. Shendong Mining Area has done better in this respect, setting a single-day tunneling record of more than 70m, setting a record high, which should be the first in China. From the production practice of coal mining enterprises, continuous shearer is mainly used in two-lane and three-lane longwall faces, which can realize efficient and rapid excavation of cantilever roadheader and save mining operation cost. The main disadvantage of this kind of mechanical equipment is that it requires higher natural conditions of coal seam.

3.3 Integrated technology of digging and anchoring

As well as advanced technology and experience from abroad, have made great progress in this respect for the development of China. At present, there are two main types of anchor digging units: one is the anchor digging unit form of continuous shearer; The second is the anchor machine formed by the excavation of cantilever roadheader. The principle of anchoring is to effectively realize the same set of equipment to complete the work of roadway excavation at the initial stage of tunnel excavation, thus greatly improving the efficiency of roadway and roadway equipment displacement operation. The integrated equipment for excavating and anchoring is a national innovation project, and it is the first-class scientific research achievement of coal mine roadway excavation in the world at present. In the process of roadway excavation, different from the traditional working methods such as loading, transportation, bolt-mesh support and cutting, a new coal cutting and bolt-mesh support method is needed to optimize the excavation process and improve the excavation efficiency. It has the advantages of high speed, high degree of automation, high working efficiency, low labor intensity and high reliability, and can be used in the special practice of large-section all-coal roadway.

Four. conclusion

According to the current level of roadway excavation construction in China, it needs to be improved urgently. At present, the status of energy supply in economic and social development is getting higher and higher, and the demand for energy is also increasing. In China's natural resources, the content of coal is the largest, so coal has become the main energy supply in China. When coal is supplied, it can only be achieved through mining. In coal mining, roadway excavation is the main link. In order to ensure coal mining, it is necessary to continuously improve roadway driving technology.

refer to

[1] He Hongrui. Discussion on coal mine driving technology [J]. Management and technology of small and medium-sized enterprises (the first issue).

[2] Lu Rong. Resource integration in coal industry and its influence on coal price [J]. Price theory and practice. 07 issue of 2009.

[3] Liu Chaojie. On the construction of safety access system for coal mining enterprises ―― Also on the system reform of coal mining enterprises [J]. Learn the sea. 20 1 1（04）。

[4] Robert Bertrand. Exploration of green mining technology in coal mine [J]. Science and Technology for Development (Applied Edition).

[5] Yin Guanghui. Discussion on coal mining technology under the new situation [J]. Manager. 20 10（06）。

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