Coal uncovering water prevention and control protection method for safe tunneling in water-rich coal seam rock roadway

Abstract

The invention discloses a coal uncovering water prevention and control protection method for safe tunneling in a water-rich coal seam rock roadway. The coal uncovering water prevention and control protection method comprises the following steps that: in combination with ground transient electromagnetic method exploration and underground direct current method exploration, a water-rich abnormal area distribution condition of an underground rock roadway tunneling coal uncovering preparing area is mastered, and advanced exploration is carried out on a head-on low-resistance abnormal area of a tunneling roadway from a three-dimensional angle; in the underground rock roadway tunneling coal uncovering preparing area, advanced water drainage is carried out by adopting a long drilling and short drilling method, and then a group of advanced exploration holes are respectively constructed in areas which are vertically close to a coal seam bottom plate by 5m and 2m; coal seam water is explored in a target area, and final hole water quantity and water pressure of a drainage drill hole are observed; an effluent water sample of a water-rich coal seam of the drainage drill hole is collected, and the hydrochemical characteristics of the effluent water sample are analyzed; and the coal seam in the hole and the water outlet condition are observed and researched by adopting a drilling observation instrument. According to the method, the economic investment is relatively small, the construction period is short, and the time requirement for quickening infrastructure construction of a mine is met.

Description

technical field [0001] The invention relates to the technical field of mine construction, in particular to a water-rich coal seam rock roadway safe excavation coal mining prevention and water protection method. Background technique [0002] During the construction of underground mines, roadway excavation may be affected by water-rich aquifers. In the Yuhengbei area of ​​the Jurassic coalfield in the Ordos Basin in my country, the No. 2 water-rich coal seam has been discovered in recent years. The threat of water damage from water-rich coal seams. Since the mine is in the stage of infrastructure construction, underground and surface drainage facilities and water treatment systems are not yet complete, and it is impossible to solve the problem of a large number of water discharges in a large number of excavation working faces. Related work to ensure safe production at the excavation face. [0003] Based on this, the present invention devises a water-rich coal seam rock roadw...

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of water-rich coal seam rock roadway safe excavation excavation coal prevention and water protection method, to solve the above-mentioned background technology because the mine is in the stage of infrastructure construction, underground and ground drainage facilities, water treatment systems, etc. are not yet complete, It is impossible to solve the problem of a large amount of water in a large number of excavation working faces. Therefore, before excavating and unearthing coal in rock roadways, it is necessary to carry out related work such as advanced exploration and water drainage in advance to ensure the safe production of excavation working faces.

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