A method for joint monitoring of the internal movement of mining rock formations in water-rich strata with double open holes on the ground

Abstract

A ground dual open hole joint monitoring method for the internal movement of the mining rock in the water-rich stratum. According to the height range of the water-conducting fissure zone that is expected to be formed after the coal seam is mined, two adjacent open holes are constructed on the ground, and one mainly monitors the water-conducting fissure. The movement of the above rock strata does not need to be drilled for waterproofing. The other mainly monitors the movement of rock strata within the range of water-conducting fissures. The water-rich section adopts casing protection holes to isolate the aquifer. The lower part reaches the deepest monitoring point. After the in-hole monitoring instrument is placed, the joint monitoring collector at the orifice is connected by a steel wire rope to realize joint monitoring of the internal measuring points of the two open holes, reflecting the law of internal movement of the rock formation. This monitoring method solves the problem that it is difficult to safely implement rock formation movement monitoring in the same borehole under water-rich formation conditions, and expands the applicability of rock formation movement open hole monitoring.

Description

technical field [0001] The invention relates to a monitoring method for the internal movement of a mining rock layer, which is especially suitable for monitoring the movement of the overlying rock layer after the mining of a water-rich layer mine. Background technique [0002] The movement and damage of the overlying strata or rock mass after mining is the root cause of a series of mine disasters and environmental problems, such as severe underground pressure, water inrush, and surface subsidence. Carrying out the monitoring of the movement of the overlying strata after mining is the basis for grasping the law of rock strata movement and solving a series of mining damage problems caused by mining. Carrying out the actual engineering monitoring of rock movement is an important means to verify the correctness of the theory and improve the effect of disaster prevention. [0003] The actual engineering monitoring of rock movement usually adopts ground construction drilling. Anc...

AI Technical Summary

Problems solved by technology

However, for the situation where there is a water-rich aquifer in the formation and it is above the height of the water-conducting fracture zone, if the open hole monitoring method is adopted without sealing the hole, there will inevitably be a water-rich aquifer and a water-conducting fracture zone. A major safety hazard caused by underground water inrush due to the connection through the hollow borehole

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