Boulder geotechnical conditions under overlying explosion pretreatment method for determining the specific charge

The present invention provides a method of determining one kind of boulders geotechnical conditions under cladding explosion pretreatment explosives consumption to determine solitary under overlying geotechnical conditions by using the correction calculation Sweden empirical formula Q = Q1 + Q2 + Q3 + Q4 of blasting explosives consumption pretreated stone, wherein Q is the best site blasting explosives consumption; Ql substantially specific charge, Q1 = k1q1; Q2 is caused by pressure increment burst region depth above, Q2 = 0.01h2, h2 above the critical pressure region for the depth; Q3 covering layer is over the critical region increments, Q3 = k3h3, h3 is a thickness of a cover layer of soft soil; incremental expansion of the rock Q4, Q4 = 0.03h4, h4 is the height of the bench blasting. The present invention is determined by correcting the empirical formula Sweden overlying boulder geotechnical conditions under explosive blasting pretreatment consumption, ease of calculation, a small error and the actual results of specific charge of explosives consumption, high accuracy, the burst block degree to meet the relevant indicators, applicability.