Bottom plate automatic net spreading and connecting device and method for slicing of thick seams

Abstract

The invention discloses a bottom plate automatic net spreading and connecting device and method for slicing of thick seams. The bottom plate automatic net spreading and connecting device comprises a plurality of hydraulic supports which are in parallel with an excavation working face, and the tail of each hydraulic support is provided with a rear seat. A net coil spreading mechanism, a slipping mechanism and a net connecting mechanism are arranged on each rear seat. The net coil spreading mechanisms are used for mounting or spreading well wound net coils. The slipping mechanisms are arranged below the net coil spreading mechanisms and used for driving the net coil spreading mechanisms to slip in the mode of being parallel with the excavation working face to spread the net coils. The net connecting mechanisms are fixed to the slipping mechanisms and used for sewing and connecting the overlapped parts of the to-be-spread net coils and the spread net coils. The automatic net connecting function is achieved, the number of equipment is decreased, the equipment cost is reduced, and meanwhile the bottom plate automatic net spreading and connecting device and method further have the advantages that the net spreading efficiency is high, the workload of downhole workers is little, and operability and practicability are greatly achieved.

Description

technical field [0001] The invention relates to the technical field of layered mining of thick coal seams, in particular to a device and method for automatic floor laying and networking of layered mining of thick coal seams. Background technique [0002] There are a large number of rich coal resources in the central and western regions of my country, and the thickness of some coal seams reaches 20m. Research on the mining technology of such extra-thick coal seams has extremely important strategic significance for the sustainable development of my country's coal resources and the improvement of economic benefits. [0003] The current mining methods for extra-thick coal seams mainly include full-thickness fully-mechanized mining with large mining height, fully-mechanized top-coal caving method and layered mining method. Under the condition of the existing technical equipment, when the thickness of the coal seam exceeds 10m, two methods are generally adopted: layer mining and t...

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: 1. In the mining of the working face, in the process of laying the net on the floor, it is necessary to set up a net roll and arrange a networking mechanism for each support on the working face, and the transformation of the support is relatively large, and the equipment cost is high; 2. Due to Each hydraulic support is equipped with net rolls and networking mechanisms, so multiple underground workers are required to manage net laying and networking independently, which is labor-intensive and inefficient, and multiple networking agencies work together, resulting in a high accident rate; 3. The invention The current networking mechanism is mainly to network the metal mesh, but the long-term physical performance of the metal mesh cannot be fully guaranteed, especially under complex conditions underground, it is more likely to be corroded and damaged, and the metal mesh is extremely inconvenient to carry, and the labor intensity of the workers is very high. At present, thick coal seam layered mining in coal mines mostly uses plastic mesh or polyester fiber mesh, so it is necessary to design a new networking mechanism to meet the current networking needs of thick coal seam layered mining

This invention provides greater lateral torsional strength and laying space, but does not involve the structure and technology of the laying and networking device, and cannot realize automatic laying and networking in the mine

Images