PERSPEKTIVY PRIMENENIYA AKUSTICHESKIKH METODOV PRI PROGNOZE I PREDOTVRASHCHENII GAZODINAMICHESKIKH YAVLENIY I KRUPNOPLOSHCHADNYKH OBRUSHENIY KROVLI V UGOL'NYKH SHAKHTAKH
Journal: Bulletin of Research Center for Safety in Coal Industry (Industial Safety) (Vol.-, No. 3)Publication Date: 2017-09-25
Authors : Shadrfin A.V. Teleguz A.S.;
Page : 10-14
Keywords : EMERGENCY RESISTANCE; HYDRAULIC PROCESSING OF A DIFFICULT ROOF AND COAL- LAYER; METHODS OF ACOUSTIC EMISSION AND SPECTRO-ACOUSTIC;
Abstract
The possibllities of app/ying the acoиstic eтission тethod for controlling the deve/opтent of cracks in the hydroprocessing of а coa/-bearing тassif with the аiт of redиcing its ejection and iтpact hazard, as well as preventing large-sca/e roof col/apse, are considered. lt is estaЬ/ished that the /ength of the growing fractиre fractиre, qиalitative/y estiтating its area, is re/ated to the питЬеr of АЕ pи/ses Ьу ап exponentia/ dependence. ReasonaЬ/e tiтe dependence of the activity of АЕ at а liqиid discharge with а constant rate, which except for а sта// initial portion of the character has а тonotonical/y decreasing function. lt is estaЬ/ished that, in the first approxiтation, the optiтal injection rate is inverse/y proportional to the vо/ите of /iqиid ритреd into the reservoir иntil it breaks into the nearest production.The perspectivity of using the spectra/-acoustic тethod for estiтating the stressed state of the treated area ofthe array is shown, since the ratio of the high-frequency and low-frequency parts of the noise spectruт of the working тining eqиipтent тeasиred Ьу this тethod depends оп the average stresses acting in the control/ed area of the тоипtаiп тassif. The areas of research that will al/ow иs to refine these acoиstic тethods before practica/ use are discиssed.
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