Maqolada коп qazish ishlarini rivojlantirish y o ’nalishini tanlash maqsadida qoplovchi toshlar kon jinslari namunalariningturli struktura tekisliklari b o ’yicha bo’linishi qiyinchiligining o ’zaro bog’liqligini aniqlash vamustahkamlik ко ’rsatkichlari son miqdori'vb maydalanish energiya talabini belgilash uchun о 'tkaziladigan eksperimentaltadqiqotlar nazariy asoslari va tajribalar natijalari keltirilgan.

Tayanch iboralar: Tog’ jinsi, qoplovchi tosh, mustahkamlik, kuchlanish, namuna, pona, indentor, b o ’linish, darz,massiv, zarb, energiya talabi, marmar, granit, texnologiya.

The theoretical foundations and results o f experimental works on splitting samples o f rocks o f natural facing stone fordetermining the type o f dependencies between the laboriousness o f splitting rocks on different planes and establishingquantitative strength parameters and energy intensity offracture are given in the work with the aim o f selecting the directiono f development o f mining operations.

Key words: rock, facing stone, structural behavior, energy intensity o f fracture, sample, gad, indenter, split, cleft,massif, stroke, energy intensity, marble, granite, technology, indent, design parameters o f working tool, determination o fultimate strength o f rock samples, technological test circuits, processing o f results.