Aquifer preventing and controlling method for coal face roof plate separation layer

Abstract

A prevention method for a water body at an abscission layer on a roof plate for a working face of mining is provided, which can be applied for the coal layer that has formed abscission seeper on the roof plate before the mining. Before the mining on the working face, making drilling hole groups in the upward and downward direction to the mountain along with the slot (rail track lane and mechanical lane) under the working face, so as to realize simplified water diversion and discharging of well before mining; during the mining on the working face, conduct the water diversion and discharge throughout the ''whole process'' of mining via the mountain descending drill hole outside the mining impact scope of the working face, so as to cut off the water source for the abscission seeper on the roof plate; conduct the dynamic monitoring, diversion and discharge of seeper on the roof plate by estimating the height for the cultivation of a water guidance gap via the exceeding degree of mountain ascending direction over the coal layer to be explored as well as by going through the drill hole at the expected layer of abscission seeper on the roof plate. Therefore, by dynamic monitoring of abscission seeper and the diversion and discharge of seeper throughout the whole process of mining, the invention is able to realize the working environment without water, thus preventing the accident caused by abscission seeper and ensuring the high efficient mining on the working face. With simple method and convenient application, this invention is able to realize excellent social and economic benefit.

Description

technical field [0001] The invention relates to a method for preventing and controlling the separation layer water body on the roof of the coal mining working face in a coal mine, and is especially suitable for the coal seam where the separation layer water accumulation has been formed on the roof before mining. Background technique [0002] Water inrush is one of the four major disasters in coal mines. Although scientific and technical personnel have conducted long-term research on the conditions, mechanism and prevention methods of water inrush in coal mines, and achieved fruitful results; however, due to the complexity of geological conditions, the investment in research on water inrush prevention in specific locations is insufficient, and some technologies have not yet been resolved. etc. my country's coal mine water inrush accidents occur from time to time. In recent years, with the increase of national coal production, the deepening of mining, and the increase of minin...

AI Technical Summary

Problems solved by technology

Among them, the method of "advanced dewatering of the roadway prepared by coal mining" is suitable for the dewatering of the working face in the mining area. This will affect the normal advancement of the working face, and even cause water damage accidents on the working face; at the same time, the depth of this type of dredging borehole is only within the range of the water-conducting fracture zone of the coal seam to be mined, while the water inrush of 5.21 Water source—the development height of the abscission water body is far beyond the scope of the water-conducting fracture zone, so the draining boreholes cannot achieve the purpose of releasing the abscission water

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