PL236254B1 - Band measurement system of cross-section changes for continuous monitoring, in particular of mine shaft lining, in particular with elliptic cross-section - Google Patents

Abstract

The subject of the invention is a band-shaped measuring system for changes in cross-section for continuous monitoring, especially of the lining of a mining shaft, especially with an elliptical cross-section, containing measurement points connected by a pair of cables, in which two measuring points (2) are equipped with mountings (3) of the first end of the quarter-axial measuring cable (4). ), the other end of which is terminated with a return spring of a linear potentiometer (6) at adjacent measuring points (2), and halfway between the measuring points (2) supporting brackets (5) are attached to the rods (4). The linear potentiometers (6) are connected with a power-industrial cable to the level concentrator (7), which is connected to the microcontroller (8), memory (9) and Bluetooth module (10).

Description

Description of the invention

The subject of the invention is a band measuring system of cross-section changes for continuous monitoring, especially mine shaft lining, especially with an elliptical (including circular) cross-section.

As a result of mining exploitation, the shaft is deformed in the vertical and horizontal plane. Forecasts of the impact of this exploitation as well as periodic shaft inspections and geodetic inspections of the condition of the shaft lining are to ensure its safety. However, the forecasts are always given with some error resulting from the adopted mining parameters and uncertainty as to the stability of the rock mass or undisclosed discontinuities or voids or snowstorms near the shaft. Periodic inspections are reduced to the observation by authorized persons of the shaft lining, which in poor lighting and a distance of several meters determines the visibility of only major changes, and periodic geodetic measurements determine the condition of the brickwork only at the time of measurement, not responding to the trend of changes and do not ensure continuity of observation, creating an additional danger for surveyors and excluding the glass from work for many hours. Continuous monitoring is possible thanks to length sensors measuring the distances between points, previously installed across the shaft lumen. In the above application example, used during the sealing (high-pressure injection) of the Kościuszko shaft in KS Wieliczka, such a solution was possible because it is a non-moving ventilation shaft. Otherwise, such a solution would prevent the shaft cage from moving.

The aim of the invention is to enable the observation of continuous, metric changes in the cross-section of the mining shaft lining, especially with an elliptical cross-section, including circular, while ensuring the possibility of the shaft cage moving in the shaft lumen and ensuring maximum durability of the measuring instruments. Earlier solutions were based on the continuous monitoring of changes in the cross-section by placing strands perpendicular to each other, which prevented the movement of the shaft cage and skips in the light of the shafts. The developed solution eliminates this problem.

This solution enables continuous measurements of changes in the cross-section of the shaft lining with the possibility of recording and analyzing data, while ensuring the mobility of the shaft and the safety of the measurement system. It also reduces the time of measurement exposure to danger in difficult conditions of shaft measurements.

According to the invention, in the band measuring system of cross-section changes for continuous monitoring, in particular of the lining of a mining shaft, especially with an elliptical cross-section including measuring points connected by a pair of cables, the two measuring points are equipped with fasteners for the first end of a quarter-axis measurement string, the other end of which is ended with a spring feedback of the linear potentiometer at adjacent measuring points. In the middle of the distance between the measuring points, support handles are attached to the tendons, and in addition, linear potentiometers are connected with a power-industrial cable with a level concentrator, which is connected with a microcontroller, memory and a bluetooth module.

The subject of the invention in an exemplary embodiment is illustrated in the drawing, in which the figure shows a diagram of the cross-section measurement system.

In the band measuring the changes in the cross-section shown in Fig. Every quarter of the shaft pipe (1) circumference, the measuring point (2) was stabilized. Two measuring points (2) are equipped with fasteners (3) for a quarter-axis measuring rod (4) ended with a return spring of a linear potentiometer (6) at adjacent measuring points (2). In the middle of the distance between the measurement points in the shaft casing, support grips (5) are mounted, as a result of which each quarter-axis tendon (4) has its position held every half of its length. The entire system is covered with a semi-elliptical polycarbonate ring that provides protection against objects falling into the shaft and air pressure. Observation data from linear potentiometers (6) are connected to a measuring system with a transmission line of telemetry signals (with a power supply and transmission cable) to a level concentrator (7) supplied from the power grid. The level concentrator (7) writes data directly to an analog-to-digital memory card (9) via a microcontroller (8) and makes them available via a bluetooth module (10) or via a transmission line of telemetry signals electrically coupled with the converter, preferably analog-to-digital, transmitting the data to a central data concentrator connected to the computer input interface, which is also a data server.

PL 236 254 B1

The operation of the created system consists in recording the values from linear potentiometers with a set frequency (6). Using the system according to the applied utility model allows for continuous observation of changes in the cross-section of the elliptical shaft pipe, and in the case of connecting the system to the computer input interface - in real time. This solves the problem of the lack of knowledge about the condition of the shaft lining between the measurement series of periodic geodetic surveys.

At the same time, the system enables the use of the shaft, which was not possible with the use of transverse measuring rods crossing the shaft lumen.

List of reference marks

- shaft pipe

- measuring point

- fasteners

- cable

- support handles

- linear potentiometer

- level concentrator

- microcontroller

- memory

- bluetooth module

Claims (1)

Patent claim 1. Band measuring cross-section changes for continuous monitoring, especially mine shaft cladding, especially with an elliptical cross-section, containing measuring points (2) connected by a pair of cables (4), characterized in that two measuring points (2) are equipped with fasteners (3). ) of the first end of the quarter-axis measuring rod (4), the second end of which ends with a return spring of the linear potentiometer (6) at the adjacent measuring points (2), and in the middle of the distance between the measuring points (2), supporting brackets (5) are attached to the rods (4) ), moreover, linear potentiometers (6) are connected by a power-industrial cable with a level concentrator (7), which is connected with a microcontroller (8), memory (9) and a bluetooth module (10).