Ground double-hole combined water inrush prevention method for overlying strata movement monitoring and bed separation water drainage

Abstract

The invention discloses a ground double-hole combined water inrush prevention method for overlying strata movement monitoring and bed separation water drainage. The ground double-hole combined water inrush prevention method is suitable for treatment of overlying separation flood after mining of a water-rich stratum mine and comprises the steps that a rock stratum movement monitoring drill hole and a bed separation water drainage drill hole which are adjacent to each other are constructed in the middle of a working face along the trend corresponding to the earth surface, the rock stratum movement monitoring drill hole is formed to monitor internal movement information of an overlying rock stratum in the working face mining process, and the bed separation development condition is mainly mastered; and the bed separation water drainage drill hole is used for drilling and penetrating holes based on the bed separation generation time fed back by rock stratum movement monitoring in the arranged rock stratum movement monitoring drill hole, drilling and hole penetration are carried out, bed separation water is drained in a staged and controlled mode, and water inrush of the working face is prevented. The drilling depth, drainage and hole penetration of the bed separation water drainage drill hole are guided by monitoring the change of the measuring points arranged in the upper rock stratum and the lower rock stratum of the bottom interface of an aquifer. The utilization rate of the bed separation water drainage drill holes is effectively improved through combination of the mobile monitoring drill holes in the rock stratum and the bed separation water drainage drill holes.

Description

technical field [0001] The invention relates to a ground double-hole combined water inrush prevention method, which is especially suitable for the ground double-hole joint prevention method for monitoring the movement of the overlying rock and releasing the water from the separated layer, which is suitable for the treatment of the overlying separation layer flood after the mining of the water-rich stratum. Water inrush method. Background technique [0002] Coal seam mining will cause cracks in different layers of the overlying strata. When the adjacent upper and lower strata in the overlying strata deform asynchronously due to the difference in thickness and strength, transverse cracks will appear between the upper and lower strata, which is the so-called separation. layer. When the overlying rock strata above the abscission layer is a water-rich rock formation, water will accumulate in the abscission layer space. With the continuous advancement of the working face and the...

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Problems solved by technology

[0003] In the past, there was a method to drain the water from the separated layer by drilling the hole upwards, but the drilling distance is long, and it is easy to break and close and lose the drainage effect.

There is also a method of evacuating underground through ground drilling, but it is often necessary to simply judge the development of the separation layer in the hole based on the experience of orifice suction. It is often difficult to perceive the suction when the water volume in the hole is large, so The information on the formation of the abscission layer is not accurately grasped, so it is not possible to grasp the good timing of drilling through the hole, draining and sealing the hole, and sometimes the drilling has been damaged due to movement and cannot be known, and measures cannot be taken in time

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