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Support technology and application of coal mining in complex geological conditions

编辑: 毕业论文 Release time: 2016-10-12Editor : Graduation Thesis

With the continuous development and progress of society, the demand for coal mine resources is also increasing. With it, the difficulty of coal mine resource extraction is also increasing. The following is a study by Xiaobian collected and organized in complex geological conditions. The paper essay on the application of coal mining and support technology in the next coal mine is for everyone to read and use for reference.

As we all know, the safety of coal mining is the most important issue in coal mining. How to use the mining technology and support technology of coal mining to ensure the safe environment of coal mining is an important safety issue for coal mining. As one of the key links of coal mining, the mining and support technology of coal mining is not only an essential part of the smooth progress of the entire mining process, but also provides safety guarantee for coal mining. The scientific and reasonable implementation of the mining and support technology for coal mining requires detailed analysis and careful study according to the geological environment. This article mainly discusses the coal mining and support technology and its application under a complex geological condition.

1 Analysis of the coal mining environment

Due to the long history, long mining time, complicated terrain environment, many fault structures in the mining area, large ground pressure, and unstable geological environment, the coal mining area has brought about the smooth development of coal mining. Many inconveniences.

(1) Lithology changes with depth. In the process of coal mining, as the demand for coal mining continues to increase, the coal mining gradually deepens, and the geological structure of the coal seam changes. For example, changes in lithology constitute unfavorable factors for coal mining.

(2) The stability of the coal seam is poor. Investigations and related data for this mining area show that due to the influence of many factors such as the complexity of the geological environment, the stability of the coal seam in the mining area is poor, which easily leads to loosening and alienation, which hinders the progress of actual coal mining work and increases the coal mining Hidden security issues.

2 Problems in Support Technology of Coal Mining

Based on the current domestic research on coal mining technology and the application of the actual operation process, the existing problems are analyzed from the perspective of technical limitations and weak awareness as follows.

(1) There is insufficient understanding of the importance of tunneling support technology. Mining areas pay insufficient attention to mining and support technology during mining. In order to improve immediate economic benefits, they often do not feel that safety precautions and technical protection measures have been ignored. This has largely limited the development of coal mining support technology. And practical application. The specific manifestations are that the requirements of the mining team's excavation and support technology are not strict enough, the actual economic investment is insufficient, the introduction of advanced excavation and support technology is not enough, and the mining process is not enough to examine the changes in coal mine geological conditions.

(2) Technical restrictions on domestic coal mining and excavation support. Compared with the international advanced coal mining technology, the actual existing coal mining support technology cannot fully meet the needs of coal mining, and needs to be improved in terms of technology use, mechanization and management.

(3) The mining equipment is backward. Advanced equipment is an important prerequisite for improving coal mining efficiency and increasing coal mining output. However, after investigation, it was found that the demand for some equipment in the mining area lags behind that of coal mining, and cannot meet the increasing workload requirements and complex geological environment. The backwardness of the equipment severely hinders the mining and mining capacity of the mining area and causes waste of production resources and production environment.

3 Application and improvement of coal mining support technology

Aiming at the complex and special geological environment of the coal mine, combined with the technical requirements of mining and support in coal mining, the key to the technology of mining and support is analyzed from the following angles.

(1) Distinguish the applicable scope of comprehensive digging machine and general digging machine. In actual coal mining activities, the comprehensive digging machine and the general digging machine have been widely used as common coal mining and boring machines, and the application range of the comprehensive digging machine and the general digging machine has been determined and divided. It's very important with the general excavator. Generally speaking, compared with the comprehensive digging machine, the use of the general digging machine is more suitable for the construction situation where the working length is less than 300mm, and the comprehensive digging machine is suitable for the construction situation where the working length is greater than 300mm.

(2) Scientifically select the type of comprehensive excavator. In order to speed up the mining process and increase the output and efficiency of coal mining, it is very important to scientifically select the type of comprehensive mining machine. How to maximize the use of different types of comprehensive mining machine according to the specific mining environment and mining volume Important aspects. In the selection process, the suitability of the comprehensive excavator should be examined in conjunction with the cross-section environment of the roadway and the strength of the coal rock strata. In addition, the equipment itself should be strictly concerned with the operation requirements and structural division of the equipment.

(3) Scientific selection of suitable picks. The choice of picks is very important for the speed and efficiency of coal mine excavation. The choice of high-quality picks can effectively increase the speed of coal mine excavation. At the same time, it can protect the wear of the picks and minimize the degree of equipment damage. Therefore, when selecting picks, you should choose picks with high strength and high wear resistance.

(4) Use temporary support technology. The normal operation of the hydraulic system has a crucial impact on maintaining the progress of mining and ensuring the safety of coal mining. In the daily coal mining process, in order to maintain the normal operation of the hydraulic system, temporary support technology should be adopted to protect it.

(5) Improve the management system of the coal mine excavation process. Only by gradually perfecting and strengthening the relevant management regulations on coal mine excavation and ensuring the effective implementation of coal mine excavation with mandatory system regulations can fundamentally make the coal mine mining step by step scientific and compulsory. Promote the improvement of coal mining. Strengthen and improve the control before and during the excavation of coal mines, increase the punishment afterwards, treat the violations severely, and ensure the smooth progress of mining in terms of control and punishment. Aiming at the process of coal mine excavation, the construction unit should continuously learn and summarize to form a set of effective management systems that can improve the safety performance of coal mining while accelerating the speed of mining, and continuously learn advanced mining technology, with efficient and safe as the management goal.

4 Support technology for crossing faults

(1) Direct breaking method. The specific implementation process is to directly remove the top of the fault to fundamentally eliminate the hidden safety hazards brought by the fault, reduce the difficulty of construction, and then use anchor nets for support. In general, the direct roof breaking method is suitable for faults where the rock hardness is less than 5 and the drop is less than 2 meters.

(2) Backward and undercover method. When the drop difference on the coal mine interruption layer is small, the roadheader adopts backward and undercover driving to effectively protect the roadheader and ensure the integrity of the fault roof, thereby increasing safety performance.

(3) U steel method of anchor bolt support. The fault area of this mining area is relatively large, and it is easy to collapse to cause hidden safety hazards. In combination with this situation, U-shaped steel frame support should be used scientifically and used with various support methods to achieve a safe support effect.

5 Conclusion

In coal mining work in complex geological environment, we must not only pay attention to the mining volume and mining efficiency, but also carry out investigation and research for the specific mining environment, so as to take corresponding safety protection measures to ensure the smooth progress of coal mining and provide a safe environment for mining . The scientific use of mining technology and support technology in coal mining can effectively protect the safe environment of coal mining. As one of the key links in coal mining, the mining support technology of coal mining is not only a necessary component of the smooth progress of the entire mining process. In part, it also provides safety guarantees for coal mining.

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