SU1087663A1 - Apparatus for determining properties of artificial mine roof - Google Patents

Abstract

A DEVICE FOR DETERMINING THE PROPERTIES OF AN UNDISCED ROOFJ includes electrodes, measuring equipment and electrical connections, characterized in that, in order to increase the reliability of the device, it is equipped with a pipe made of transparent non-electroconductive material with end caps and contact rings mounted on the inner surface. The Nyonty elements are made in the form of a connecting rod with measuring equipment with spring-loaded contacts, while the electrodes are placed on the outside on the surface of the pipe and connected to slip rings.

Description

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00 The invention relates to the mining industry and can be used in determining the strength and structure of the earned massif made of ekladka hardness. Devices are known for determining the strength of the filling mass, which is made of hardening bookmark with a downward layer of ore bodies, which include tools for drilling drill holes for core boreholes or boreholes for installing ultrasonic sensors lj. The disadvantage of these devices is that when drilling holes for core sampling, there is a change in its properties compared to the properties of the array under study, and when drilling holes under ultrasonic sensors, the deformation of the walls from the mechanical action of the drilling tool has a negative effect on accuracy. In addition, by using drilled holes for the BHsyan radiation of the structure of the bookmark, information about the structure of the array, modified as a result of oic crown the closest to the invention of claim technical essence is ustro GUSTs implementing a method for determining timing of the setting of the clay test vklyuchayuo5ee electrodes and instrumentation elektrosoedinitelnye elements T2. A disadvantage of the known device is the unreliability of its operation in mine conditions (blasting, etc., due to the need to run a considerable distance of connecting wires. The purpose of the invention is to increase the reliability of the device. This goal is achieved by the roof, which includes electrodes, measuring equipment and electrical connecting elements, is equipped with a pipe of transparent non-conducting material, end caps and contact The rings are installed on the inner surface of the pipe, and the electrically-connecting tools are made in the form of a rod with associated spring-loaded equipment, while the electrodes are placed on the outer surface of the pipe and connected to the contact rings. on it with electrodes, a vertical section; in Fig. 2, section A-A in Fig. I; in Fig. 3, the arrangement of the device in the blanked off production during measurements, the general view. The device for determining the properties of an artificial roof consists of a transparent pipe 1 made of non-conductive material, for example, Plexiglas, and electrodes 2 rigidly fixed to pipe I with screws 3. Electrodes 2 are separated by an insert 4 made of non-conductive material fixed between them. Screws 3 inside the pipe I are fitted with contact rings 5. There are plugs 6 installed on the pipe ends. Electro connectors consist of rod 7 with spring-loaded contacts 8 fixed on it and switch 9. The measuring equipment includes switch 9 and device 10. Determining the properties of the backfill array using the device is as follows. Before erection of the backfill array, pipe 1 is correctly installed in redeemable production, with electrodes 2 fixed on it and with plugs 6 inserted. Depending on the conditions of construction of the backfill array, several pairs of electrodes 2 are installed at a certain distance from each other. The area of electrodes 2 is open and the distances between them in each pair are the same — the number of devices installed in the redeemable entry corresponds to the condition: one device per 100–120 m of redeemable space. After finishing the installation of the pipe 1, the bottom plug 6 is removed from it, then the measuring rod 7 is inserted into the pipe 1 with the spring-loaded contacts 8 fixed on it. The number and location of the contacts 8 correspond to the number and location of the rings 5 in the pipe 1. Using the switch 9 and the device 10, the electrical resistance between the electrodes 2 of each pair and between the pairs of electrodes 2 is measured vertically, and the strength of the tab at the installation site of the pair of electrodes 2 and the weakening plots in the array in height. For visual and study of the structure of the backfill array, the optical stack of the RVP device is not shown inside the pipe (not shown).

The proposed device allows you to quickly and reliably receive

The information about the strength of the artificial roof, which is the basis for the development and use of the most effective passports for fastening the workings underneath it and, accordingly, reduces the consumption of fastening materials.

Fig, 1

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Claims (1)

DEVICE FOR DETERMINING PROPERTIES OF ARTIFICIAL ROOF, including electrodes, measuring equipment and electrical connecting elements, characterized in that, in order to increase the reliability of the device, it is equipped with a pipe made of transparent non-conductive material with end caps and contact rings mounted on the inner surface of the pipe, and electrical connecting elements are made in the form of a rod connected with measuring equipment with spring-loaded contacts, while the electrodes are placed on an external turn They are connected to the contact rings. >