Мaqolada qoplama tosh bo’laklarini qazib olishda qo’parilgan yuzada yoriqlarning rivojlanishiniboshqarish, hamda tog’ jinslarini maydalashda kuchlarni va yuklamani qo’llash usuliga, ish bajaruvchi a’zo konstruktsiyasiga va uning ta’siri prinsipiga bog’liq bo’lgan mexanizmi va energotalabi masalalari ko’rib chiqilgan. O’tkir yoriq qirrasida kuchlanish kontsentratsiyasi koeffitsienti va shpurlar orasidagi masofa mustahkamligining klassik nazariyasidan kelib chiqib aniqlangan.

Tayanch iboralar: Tosh bo’lagi, qo’parib olish konturi, mustahkamlik kriteriyasi, maydalanis mexanizmi va jarayoni, kuchlanish, yoriq, asbob, kuchlanish intensivligi, kuchlanish tenzori, deformatsiyaenergiyasi, shpurlar orasidagi masofa.

The article highlights the governance of crack propagation mechanism in the plane of separation in the extraction of stone blocks, and the mechanism and the energy intensity of rock breaking that depend on the loading technique, the working element construction and the principle of its operation.The stress concentration factor at the top of sharp crack and the hole spacing from the point of view of the classical theory of strength are established.

Key words: stone block, separation outline, strength criteria, mechanism and process of destruction,stress, crack, tool, stress intensity, stress tensor, strain energy, hole spacing.