Strip filling integral backstopping coal mining method

Abstract

A band filling stoping mining method effectively solves the problems in the prior stoping mining of a 'three-low' coal bed, such as the sedimentation and distortion of the earth surface, the low recycling rate of coal and charcoal resources, the existence of safety hazards, etc. The method comprises the following steps: a transporter and a coal mining machine are laid on the working face of the mining area; in the direction perpendicular to the direction of the transporter movement, a timbering device which is composed of a hydraulic bracket of the working face, a side molding board bracket for filling beside the lane and a back molding board bracket for filling beside the lane, and connected with the connecting head of the transporter is arranged; after the brackets are pushed along the working face, paste concrete is injected through a pipeline into a filling mold cavity enclosed by the brackets, so as to form a band-shaped filling wall which is supported between the top plate above the goaf and the bottom plate of the coal bed. By the method, safe and convenient mining operation is ensured; the recycling rate for coal and charcoal is increased; meanwhile, the sedimentation and distortion of the overlying strata of the coal bed and the earth surface can be controlled in a very small range of deformation permitted by a building, thereby minimizing the amount of gentle sedimentation of the earth surface, and protecting buildings and attachments on the earth surface.

Description

technical field [0001] The invention relates to a coal mining method for coal seam mining, in particular to a strip filling integral coal mining method suitable for "three lower" coal seam mining, which can realize safe mining and achieve the same level as the existing comprehensive mechanized mining. The coal recovery rate is high, and at the same time, the settlement of the overlying rock layer and the surface of the coal seam can be controlled within the allowable minimum range, ensuring the safety of surface buildings and attachments. The invention belongs to the field of coal mining methods. Background technique [0002] At present, the coal mining methods for coal seams accumulated in villages and important buildings, road and bridge facilities, and lakes and other underground water bodies (commonly referred to as "three lower") are relatively limited. If appropriate measures are not taken, such coal seams will be mined rashly. The collapse and fracture of the overlyi...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a strip filling integral back mining coal mining method, which effectively solves the problems of surface subsidence deformation, low recovery rate of coal resources, and potential safety hazards in existing "three lower" coal seam back mining. Utilizing mature mining technology and common equipment, it is beneficial to the mining of the "three lower" coal seams. The mining operation is safe and easy to operate. While improving the coal recovery rate, it can control the settlement deformation of the overlying rock layer and the ground surface on the coal seam. Within a very small range of allowable deformation, the gentle subsidence of the ground surface is minimal, so as to achieve the purpose of protecting the surface buildings and attachments

Images