A kind of accurate controlled blasting method of town rock medium-length hole

A kind of accurate controlled blasting method of town rock medium-length hole

  • CN 102,818,486 B
  • Filed: 08/17/2012
  • Issued: 02/03/2016
  • Est. Priority Date: 08/17/2012
  • Status: Active Grant
First Claim
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1. the accurate controlled blasting method of town rock medium-length hole, is characterized in that:

  • comprise the following steps;

    (1) blasting parameter design and calculating, according to explosion object determining hole network parameters, pattern, drilling depth, charge constitution, stemming length, blasting circuit, short-delay time, firing order, explosive specific charge amount, stone fling distance checking computations and the Calculation of Safety Distance of shock wave;

    (2) layout before explosion, comprises cloth hole, boring, pore-forming examination, powder charge, blocking, networking and Security alert;

    (3) explosion and demolition effect inspection;

    Initiating equipment in described blasting method is digital electric detonator;

    Be provided with at least two-layer cartridge bag in big gun hole, with arranging with the cartridge bag on layer in same level, between adjacent row, cartridge bag fault is offered and is put;

    Adopt " V " type order to push up to hole from the bottom of hole when detonating, detonate from the bottom up, produce the space of a V-shaped in the middle part of Ji Xiancongbao district, for the scope of freedom is created in the explosion in back segment big gun hole, then detonate with section in both sides;

    The use flow process of described digital electric detonator is as follows;

    1. detonator registration, 2. arranges detonator delay, hand-hole of 3. being checked the number by detonator, and 4. networking connects, and 5. network test, 6. enters flow process of detonating;

    Described flow process of detonating comprises, and detonator roll-call, detonator state verification, charges, detonates;

    With layer cartridge bag hole between and row between detonate delay disturb the principle of damping to calculate gained after mutually superposing according to crest during blasting vibration and trough, between hole extension be spaced apart 2ms, between row extension be spaced apart 5ms;

    Interlayer extension interval 25ms, last round is light blast hole, and after crag explosion completes, 100ms detonates.

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