A constant resistance anchor beam support method for gob-side roadway roof in integrated production and retention mining

Abstract

The invention discloses a mining and remaining integration exploitation entry-along-goaf roof constant-resistance anchor beam support method which comprises the following steps: (1) delimiting a mining and remaining exploitation region, tunneling the mining and remaining region to form a mining and remaining region boundary guide roadway and an exploitation working face which are perpendicularly arranged, and carrying out deep hole presplitting in an exploitation direction to form a roof-cut presplit crushed zone; (2) mounting a working face hydraulic bracket, a coal cutter, a conveyor and a kerf-beside-roadway hydraulic bracket on the exploitation working face; (3) cutting an entry-along-goaf by using the coal cutter, and conveying coal bodies through the telescopic scraper blade conveyer; (4) supporting the entry-along-goaf by using an end socket hydraulic bracket and a beside-roadway roof-cut hydraulic bracket, reinforcing an immediate roof by using a constant-resistance anchor cable, and tightly hanging the immediate roof to a main roof; (5) with exploitation, enabling the immediate roof of a goaf to slide off along the roof-cut presplit crushed zone to enable a resistance anchor beam with high constant resistance to be located in a stope side distressed zone and anchored on the main roof; (6) after the entry-along-goaf is stabilized, removing the end socket hydraulic bracket and the beside-roadway roof-cut hydraulic bracket in the entry-along-goaf.

Description

technical field [0001] The invention relates to a constant-resistance anchor beam support method for the roof of gob-side roadway in integrated mining and retention mining. The edge of the gob is reinforced with the roof of the gob-side roadway cut by a coal cutter. Background technique [0002] For a long time, my country's coal production has been dominated by longwall mining, that is, the mining area is divided into several sections, and each section is first dug up and down along the tunnel as a ventilation and transportation roadway. After the upper section is recovered, the lower section is transported. The roadway is located at the edge of the goaf after mining in the upper section of the working face. Due to the side support pressure of the stope and the repeated disturbance of the mining dynamic pressure, the roof pressure of the transportation roadway in the lower section is high, and the surrounding rock deformation of the roadway is large. In order to solve this ...

AI Technical Summary

Problems solved by technology

In order to solve this problem, traditional longwall mining adopts the method of leaving coal pillars between the transportation roadway in the lower section and the air return roadway in the upper section to maintain the stability of the roof of the transportation roadway in the lower section. The working face of the lower section is separated from the goaf of the working face of the upper section. This coal mining method of maintaining the roof of the roadway along the goaf by retaining coal pillars has caused the disadvantages of mining technology such as excavation before mining and separation of excavation in coal mining. , which further lead to high production cost, low production efficiency and waste of resources, and because of the concentration of stress in the surrounding rock of the gob-side roadway, impact dynamic disaster accidents occur

The application rate of this mining method in my country's state-owned large and medium-sized coal mines has reached more than 80%, which has caused problems in my country's coal industry, such as safety, mining costs and waste of resources, restricting the development of my country's coal industry, and does not meet the needs of my country's energy development and transformation in the new era

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