Fully mechanized coal mining face hybrid type advanced support method

Abstract

The invention discloses a fully mechanized coal mining face hybrid type advanced support method. According to the fully mechanized coal mining face hybrid type advanced support method, a support modeof ZQL2*4800 / 20 / 38 type stepping split type advanced support and hydraulic support column combination is adopted, and the fully mechanized coal mining face hybrid type advanced support method is characterized in that the support is divided into an upper road, a middle road and a lower road; the 60m lower road is fully supported by the advanced support; the advanced support is used for about 20m from a coal wall towards outside to a crusher sliding way section in the upper road, a single-body shed is set up in advanced outwards to 60m, cross-shaped beams or I-shaped beams are adopted to contacta roof, and a hinged mode is one-beam one-column; a single-body shed support is set up in the middle road, and the other support mode is same as the outer section of the advanced support of the upperroad; and the single-body shed is further set up in advance outwards to 60m to meet the support distance requirement. According to the fully mechanized coal mining face hybrid type advanced support method, support intensity is obviously improved, labor intensity of workers is reduced, the safety factor is improved, support construction time is shortened, thus the labor efficiency is improved, meanwhile a support system is simplified, the space is reasonably utilized, the support costs in the mining investment and the coal extraction period are reduced, and thus an excavating system is more economic and reasonable.

Description

technical field [0001] The invention belongs to the technical field of mine support, and in particular relates to a hybrid advanced support method for a fully mechanized mining face. Background technique [0002] With the increase of coal mining depth, mine pressure increases sharply. High ground stress is the cause of rock burst accidents, and rock burst disasters have become one of the key disasters in deep well mining. In the theory of disaster prevention and control, strong support has become an important means to prevent rockburst disasters. [0003] Article 97 of the "Coal Mine Safety Regulations" stipulates that all safety exits in the coal mining face and the joints of the roadway must be strengthened in the area affected by the advanced pressure, and the length of the roadway with reinforced support must not be less than 20m. The quality of the end of the working face and the advance support of the two lanes is crucial to the prevention of rock burst. Therefore, t...

AI Technical Summary

Problems solved by technology

In order to ensure the width and height of the safety exit and the safety clearance requirements of the equipment, if the advanced hydraulic support is arranged at the position of the reloader head and the crusher, the section of the roadway needs to be larger, which will greatly increase the cost of roadway excavation on the one hand, and greatly increase the cost on the other hand. Surrounding rock control and roof management are difficult, so it is necessary to optimize the design of advanced support methods on the premise of meeting the roadway support requirements