Monitoring method for mechanical deformation of mine filling body

Abstract

The invention provides a monitoring method for mechanical deformation of a mine filling body. The monitoring method comprises the following steps of (1) fixing an anchor rod at the bottom position of an air return shaft corresponding to a filling body, and fixing a channel steel with a hole at the wellhead position of the air return shaft which is positioned at the top part of the filling body; (2) taking one steel wire rope, forming a fixing end by fixing one end of the steel wire rope on the anchor rod, and forming a movable end by penetrating the steel wire rope out from the small hole on the channel steel; (3) enabling the steel wire rope to be always in a tightening state, and measuring initial distance L between the movable end of the steel wire rope and the small hole of the channel steel; and (4) measuring distance l between the movable end of the steel wire rope and the small hole of the channel steel at regular time intervals, and obtaining deformation l' of the filling body in a vertical direction by utilizing a formula: l' = L - l. The monitoring method provided by the invention is simple and accurate, existing engineering or waste engineering such as the air return shaft is fully utilized, the work amount for monitoring is less, the monitoring cost is low, and the influence on underground associated engineering is small.

Description

technical field [0001] The invention belongs to the technical field of geological and mine monitoring, and relates to a method for monitoring force deformation of a mine filling body. Background technique [0002] Large-scale pit mining mines are mined by the downward layered mechanized panel horizontal approach cemented filling mining method. In the mine room or ore block, as the mining face advances, the filling material is sent to the goaf to manage the ground pressure, control the collapse of the surrounding rock and the movement of the ground surface, and protect the formed filling body down for recovery. However, it has been proved by practice that even the cemented filling method with high filling strength will cause large-scale movement, deformation and destruction of the rock mass on the surface. With the continuous expansion of the depth and scale of underground excavation, the existence of a large number of filling bodies will inevitably lead to large-scale r...

AI Technical Summary

Problems solved by technology

However, there is no effective monitoring method for the vertical deformation of filling bodies, especially for large-volume filling bodies.

Rock mass engineering generally uses a multi-point displacement meter to measure the vertical deformation of the filling body. However, this kind of multi-point displacement meter is very difficult to measure the vertical deformation of the thick and large filling body. Equipment for measuring similar fillings

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