SU1493776A1 - Method of locating interface between ore and filling concrete - Google Patents

Abstract

The invention relates to the mining industry. The purpose of the invention is to reduce the dilution of ore by concrete through the operational control of the ore boundary - backfill concrete during drilling. The method is to excite, record and analyze acoustic vibrations. The latter are excited by the impact of the drill bit on the well bottom, and oscillations are recorded in the frequency range determined from the expression F = 0.1 ^. (600-1100) ^. F _cr , where F _cr - the fortress of rocks on a scale M. Kontova Protod. According to the presence of acoustic oscillations in the specified frequency range, the position of the drill bit in the ore is judged, and by the moment of their discontinuance — the transition of the drill bit across the ore boundary — filling concrete. 1 ill., 1 tab.

Description

The invention relates to the mining industry of f and is intended to regulate the boundary of the ore - fixed concrete in the process of drilling blast holes and can be used in mining systems with laying out the worked out space.

Determining the boundaries of the chambers after they have been laid represents a significant production value in the development of deposits with systems with laying the worked out space; Errors in determining the boundary of the ore — backfill concrete leads either to a loss of mineral or to the dilution of the ore by concrete during re-drilling.

The aim of the invention is to improve the accuracy of controlling the boundary of the ore - backfill concrete during drilling.

The drawing shows the scheme of the proposed method.

In the process of drilling wells using a drilling machine 1, the signal from the drill bit 2 striking the well bottom is received by the seismic receiver-3 and is fed to the frequency filter, detector and measuring device 4. The filter has such parameters that passes frequencies in the F g range 0.1 (600-1100) f p. If the signal goes to measuring instrument 4, this indicates that the drill crown is in the ore.

WITH

with

Ofb

With a shock in a bang, the frequency that is received, a groove (I1 is 30-55 Hz. At the same time, the signal is black-and-white) the filter does not penetrate and ig) metiii tjiiiUbift G1ri | op A noKa; u, in, iuT is a zero value, which indicates the passage of the drill bit through rpainiuy 5 ore - laying the first concrete and the need for drilling). Due to the exclusion of drilling and inlaying concrete 6, the reduction of ore by concrete is reduced.

The method is carried out under ripoMi conditions under the following procedure.

In the vicinity of the drilling development, where the ilusyrusts and the drilling of drilling work establish the hardness of rocks Hzr (but pass the data to the data of the rock), then to the |) drill; h, or

ki

where nroiz1) od t ureis mkurov

or s.kvazh1N osta) 1ccicMo- sensor 3 is pressed, as which electrodynamic can be used

Ladaknego high rigidity, create a high-frequency oscillation spectrum. To establish the frequency ranges excited in the ore of different strength, experiments were carried out under the mineral conditions “

Acoustic instrumentation consisted of a geophone with a piezoelectric sensitive sensor made of 6 2 60 mm crystal of segnevate salt and a magnetic recording equipment with a uniform amplitude-frequency characteristic in the frequency range of 30-8000 Hz.

The source of acoustic oscillations was the impact of the drill bit in the bottom of a hole. 105 mm in diameter, drilling operations were carried out on an LPS-3 machine.

li rs as a result of research, the dependence of me; -to the range of frequencies emitted into the surrounding array of frequencies during the impact of a drilling hole in the bottom of a well and the strength of rocks according to

or 1: piezoelectric transducer-25 scale M. C horse produs (see tables allowing reception). acoustic oscillations d} ia frequencies up to 2000 Hz and more. In |, .1, water from cei i-mode is output to measuring device 4, which must have 30 ability to change the frequency band, for example, to have a set of band-pass filters. During the drilling process, the pub: delivers the instrument. When the device shows a drop in the iniquity of the sieve to zero or to an insignificant level, the drilling machine stops drilling

For the way; there are ways to determine the boundary of the ore - zack: 1 decimal: 1 4H TOHj) excitement, register and lyse the acoustic oscillations of the peak, while naslednin excite the drill bit about the bottom hole, register the elastic oscillations; in the range of frequencies, performed by the Btipa-- wife

G 0.1 (600-1 00),

where ftsr - fortress of rocks by 50

Itale M. Protode Konopa, moreover, by the use of elastic oscillations and the indicated frequency range, the position of the drill coroic is judged on.

As a result of statistical processing of TvH results, the formula F - 0.1 (600-1100) was obtained, which allows one to calculate F with an error of no more than 10%, with a confidence level of 0.95.

Therefore, applying the receiving channel - acoustic transducer - amplifier - frequency filter with

and at the mileage point of stopping their reception by -55 bandwidth F 0.1 x (600 - on the transition of the drill bit through nOO), Hz, it is possible to detect monoiaud - loose concrete. Ment transition drill bit over

II p and me. The impact of the drilling border ore - filling concrete,

This is how the objective of the image is obtained. Statistical processing of TvH results yielded the formula F - 0.1 (600-1100), which allows you to calculate F with an error of no more than 10%, with trustors. 0.95.

Therefore, applying the receiving channel - acoustic transducer - amplifier - frequency filter with

1G ni - rHHAt Hne rachuPPzhi lpie ore madna.

The advantage of the proposed dog is the possibility of reading the drilling work on the instrument, namely turning off the drilling machine at the instrument output signal equal to zero.

Thus, the use of the method will eliminate the re-drilling of explosive wells and reduce the awakening of ore by concrete.

Claims (1)

Invention Formula The method of determining the boundary of the ore - backfill concrete, consists in the excitation, recording and analysis of acoustic oscillations, so that, c) it is a matter of the accuracy of control of the face 1№1 ore - filling concrete during drilling, acoustic oscillations excite the crown about the borehole blow with a 6ypoBoi i blow, register oscillations in the frequency range F, determined from the expression ten F Oh, 1 (600-1 100), where f CR is the fortress of rocks on the scale M. Konov Protod, moreover, according to the presence of acoustic oscillations in the specified frequency range, the position of the drill bit in the ore is judged, and by the time of termination of their reception - the transition of the drill bit across the border ore - filling concrete about