A method for preventing and controlling rockburst in filling mining

Abstract

Aiming at the problem of rock burst prevention and control in thin coal seam mining, the invention arranges the traditional longwall mining area for auger drilling and filling, so that workers do not need to enter the working face to reduce the risk caused by impact; retreat mining, the transport roadway is used as a coal mining space to facilitate coal falling , as the filling space, the air return roadway can make full use of the dead weight of the waste to improve the filling efficiency and reduce the interference between coal mining and filling. Several kinds of wastes are combined for filling work. Part of the filling waste water comes from underground waste water to avoid going into the well, and part of it comes from washing waste water that is difficult to discharge directly; part of the filling waste comes from underground excavation gangue to avoid going into the well, and part of it comes from washing solid waste. Form a particle size match. Filling water bags with waste water as the filling body has strong timely support performance, and the support strength is high in the later period when the waste rock is filled at intervals. Even if the water bags are damaged in the later stage, there will be no impact. This filling method saves costs and improves filling efficiency.

Description

technical field [0001] The invention relates to the field of rock burst in coal mining, in particular to a method for preventing and controlling rock burst in filling mining. Background technique [0002] Coal is one of the main energy sources in my country. However, with the increase of coal mining life, the mine will enter the deep development stage. With the increase of mining depth, the frequency and intensity of underground dynamic disasters represented by rock burst gradually increase. Coal mine rock burst is a dynamic disaster phenomenon in which the accumulated elastic energy is released instantaneously due to the instability and damage of coal and rock mass during the mining process. Downhole roof cutting and pressure relief, surface hydraulic fracturing, and filling mining are the most commonly used methods for rock burst prevention and control; however, downhole roof cutting and pressure relief need to be drilled underground, and the construction location is gene...

AI Technical Summary

Problems solved by technology

Downhole roof cutting and pressure relief, surface hydraulic fracturing, and filling mining are the most commonly used methods for rock burst prevention and control; however, downhole roof cutting and pressure relief need to be drilled underground, and the construction location is generally located in the mining roadway, so the construction space is limited , leading to the limited use of construction equipment, the number of drilling operations, the intensity and distance of fracturing are all affected; the ideal drilling construction location for surface hydraulic fracturing often does not have the construction conditions on the ground, and the hydraulic fracturing effect is difficult Definitely; while the traditional filling mining is rarely used in the prevention and control of rock burst due to its low filling efficiency and high filling cost

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