爆破冲击作用下岩体损伤范围研究
폭파충격작용하암체손상범위연구
DAMAGE ZONE OF SANDSTONE UNDER BLASTING IMPACT
  • 万方数据
    工程地质学报 공정지질학보

    2014年 2期 233-237 ,共5页

    王小委%陈洪凯%廖云平

    왕소위%진홍개%료운평

    爆炸力学%应力波%压碎圈%塑性区%数值模拟 爆炸力學%應力波%壓碎圈%塑性區%數值模擬
    폭작역학%응력파%압쇄권%소성구%수치모의
    Mechanics of explosion%Stress wave%Crushed circle%Plastic zone%Numerical simulation
    针对地下工程岩体压碎和塑性变化两种损伤形式，本文以莫尔-库伦准则为岩体在爆破荷载作用下的破坏条件，提出了冲击波作用下岩体压碎圈范围的计算式，运用Von Mises屈服条件，计算了应力波作用下岩体塑性区范围。以KUBELA 420炸药为例，估算了重庆主城区常见砂岩在爆破过程中形成的压碎圈范围不超过1.7倍装药半径，应力波作用下岩体塑性区范围不超过25.06倍装药半径，其与数值模拟预测的结果较接近。
    침대지하공정암체압쇄화소성변화량충손상형식，본문이막이-고륜준칙위암체재폭파하재작용하적파배조건，제출료충격파작용하암체압쇄권범위적계산식，운용Von Mises굴복조건，계산료응력파작용하암체소성구범위。이KUBELA 420작약위례，고산료중경주성구상견사암재폭파과정중형성적압쇄권범위불초과1.7배장약반경，응력파작용하암체소성구범위불초과25.06배장약반경，기여수치모의예측적결과교접근。
    This paper deals with the two damage forms:rock mass crushing and plastic changes in underground engineering.It is based on Mohr-Coulomb criterion.The radii of crushed circle under the action of shock wave is obtained.It applies Von Mises yielding criterion to calculate the rock plastic zone under stress wave.It uses the KUBELA 420 explosive as an example.For sandstone in Chongqing under blasting load,the radii of crushed circle is not more than 1.7 times of charging radius and plastic zone radius does not exceed 25.06 times of charging radius.The prediction is close to the numerical simulation results.
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