Ground double-hole combined anti-water inrush method based on overlying rock movement monitoring and delaminated water release

Abstract

The invention discloses a ground double-hole joint water inrush prevention method for monitoring the movement of overlying rock and releasing the detached layer water, which is suitable for the treatment of the overlying detached layer flood after the mining of the strata rich in water. In the middle of the working face corresponding to the ground surface along the strike, two adjacent drill holes for monitoring the movement of rock formations and drilling holes for releasing water from the layer are constructed, and the drilling holes for monitoring movement of rock formations are arranged to monitor the internal movement information of the overlying rock strata during the mining process of the working face. Development of detachment layer, detachment of detachment water Drilling is based on the timing of detachment generation fed back by the monitoring of rock stratum movement inside the drill hole, and drilling and penetration are carried out to achieve staged and controlled detachment layer of water to prevent water inrush on the working face. By monitoring the changes of the arrangement of measuring points in the upper and lower layers of the aquifer bottom interface, the drilling depth, water drainage and penetration holes are guided. Through the combination of the internal movement monitoring drilling of the rock formation and the separation water drainage drilling, the utilization rate of the separation water drainage drilling can be effectively improved.

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. Floor. 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...

AI Technical Summary

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

Images