SU985324A1 - Method of determining strength of hardening filling area - Google Patents

Description

(54) METHOD FOR DETERMINING THE STRENGTH OF A STRONGER BORROWING MASSIF

one

The invention relates to the mining industry and can be used in the development of mineral deposits with hardening; laying the developed space.

There is a known method for determining the strength of a hardening filling mass, which includes drilling in a filling mass of wells, sampling cores and testing them for strength in laboratory conditions | l.

The disadvantage of this method is the high labor intensity and limited sampling.

The closest in technical essence to the present invention is a method for determining the strength of a hardening filling mass, including setting up instruments and measuring the speed of sound waves passing through a hardening filling mass 2.

The disadvantage of this method is that the strength of the array with it is determined from the open surface of an artificial pillar, which limits the possibilities of obtaining more complete data on the increase in strength of the filling mass and generally reduces the strength of the determination of strength.

ten

The purpose of the invention is to increase the efficiency of determining the strength by obtaining more complete, data on the hardening filling mass.

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Claims (2)

This goal is achieved by the fact that, in the method for determining the strength of a hardening filling mass, including the installation of instruments and the measurement of the speed of sound waves passing through a hardening filling mass, the instruments are installed in previously placed in the developed space before it is filled with a hardening mixture of pipes and moved during the measurement. In this case, the acoustic cement meter is used as a device; The drawing shows a diagram of the installation of the devices according to the proposed method (vertical section of the chamber. P {) and the production of the ore block 1 is separated, for example, the primary 2 and secondary 3 chambers in the mining sequence. First, chambers of the first 2 queues are worked out and pipes with open oorets are placed vertically in the spent chambers. The chambers are filled with filling mixtures 5, for example hardening mixtures based on portland cement. After hardening of backfill mixtures (formation of an artificial pillar) under their protection, ore secondary chambers (support zelorosis) are being tested. 3. The ore pillars are started after the accumulation of strength 5 required for the conditions of secondary chambers. The determination of the magnitude of curing in a given spatial point of an artificial pillar is carried out in the following way. An acoustic cement meter 7 is lowered into the pipe on the cable 6, with which the value of the clinging of the cement stone to the filling rock is estimated. The state of the cemented array is determined by registering the amplitude and time (the speed of propagation of elastic waves excited in the source of acoustic oscillations moving along the borehole. Thus, the propagation of elastic waves in the solidifying array of the pillars and fixing the amplitude and speed of passage of these waves through the insert determines the setting value of the array, and, consequently, the degree of the required value of the strength of the artificial pillars. This method of determining the degree of strength allows you to measure Any given point of the mountain massif, both in vertical and horizontal section.To do this, the number of pipes that are placed in the developed space before the bookmark is chosen based on the condition of providing the most complete information about the amount of adhesion of the cement stone to the filling area in any area. point of the art of the pillar. This achieves the possibility of determining the degree of recruitment, strength in the horizontal section of an artificial pillar. And the possibility of determining the degree of strength in any horizontal section of the rear sight is ensured by the fact that the cement gauge 7 on cable 6 can be lowered to any depth of pipe j. It also allows measurement at any time, and thus control the proar. The process of curing strength is wholly artificial. In addition, information on the strength of the mountain massif, obtained by the proposed method, is more reliable and reliable. This allows us to start mining ore pillars earlier, significantly reduce them, which will lead to the exclusion of operational and material costs for mining the field as a whole. Claim 1. A method for determining the strength of a hardening backfill array, including the installation of instruments and measuring the speed of sound waves passing through a hardening backfill array, is different in order to increase the strength of defining strength by obtaining more complete data on the hardening backfill array. in the developed space before it is filled with hardening mixture of pipes and moved during the measurement process. 2, the method according to claim 1, about the t and the fact that the acoustic cement meter is used as the instrument. Sources of information taken into account in the examination 1. Baikonurov O.A. et al. The study of the strength of concrete bookmarks in the development of the Dzhezkazgan field. Collection of mineral deposits, Issue 7, Almaty, 1978, S.Y1-Y7. 2. Mazei A.S., On the method for determining the strength of a concrete bookmark by acoustic methods. Sat Development of mineral deposits, vol., 5, Alma-Ata, 1976, c .ijS-SI.