(?????????????????????3??3??????????????????????????е???)

?l?????????????Χ????????

FIg??1  Sketch map of surroundingsaround blastmg building

2???????

2.1???????

?????12???????????????????????????

(1)????????????????????????????12??????????????????????????????????????????????????

(2)????????г?????????????????????????????????????????????????????????????????????

(3)?????????????1???2????????壬??????п??????????????????????1????1.8m????????е?????????????????????????????д?????

(4)????1????????С(0.16m)????????????????????????????????????????????????????????????????????????????????漼??????????????????в????????????

(5)??????????????????????????????5.Om???????С??1.Om???????????????????5.Om???????С??4.5m???????????????Ч?????????????????

(6)???????????????鴸???θ??????飬???????????????м?????????豸??????

2.2?????п?

(1)?п?λ?????????????????????????????????2???????п????????????????1??2?????е?????????????п??2???п???????????Ρ?

(2)?п???????????????????С?п????

H_min=3??(???)=3??0.4=1.2m

    ???????????????????????????????п????????2??Om??????1???2?????6.Om??????????С?????8.Om???????п????ü???????2?????

?2???????п?????

Flg??2  Sketch map of directional blasting cuts

2.3???????

???????????????β???????

(1)????????

???????????(O.4m)????L=0.26m?????a=0.45m?????b=0.4m?????(O.25m)????L=0.15m?????a=0.3m?????b=O.3m??

?????1??2????(O.36m)????L=O.23m?????a=O.35m?????b=O.3m?????(0.16m)????L=O.12m?????a=O.25m?????b=O.2m??

(2)?????????

???????????Q_xw=q??ab=600??O.4??0.4??O??45=43g???45(q????????600g??m³)?????Q_xn=700??O.25??O.3??0.3=16g???20g??

?????1???2????Q_ss=600??O.36??O.35??O.3=23g???25g?????Q_sn=1200??O.16??O.25??0.2=11g???15g??

(3)??????????????

???????????(5??)?????N_xl=5??(54.4??0.45+16??0.45)=782??????????Q_xw =782??45=35.19kg?????(7??)?????N_x2=7??(2??54.4??0.3+16??7??0.3)=5151??????????Q_xn=5151??20=103.02kg??

?????1???2????(11??)?????N_sl=2??11??16??0.35=1006??????????Q_ss=1006??25=25.12kg?????(8??)?????N_s2=2??8??[2??54.4??0.25+7??16??0.25]=13864??????????Q_sn=13864??15=208.96kg??

???????????????????????????????N=5933+14870=20803?????????????Q=138.21+234.08=372.3kg??

???????????????????????????????????1???2??????????λ?????????????????????????????Ч????????????????????

2.4??????·??????????

??????????·??????????α????????????????????????????????????????·?????????????????·??????1??2??3?η?絼???????????·????????????????·????????2?????????????????·??????????????С?????????·????????顣

??????????????????????1???2?????????25ms?????????????????????????????????????????????????????????????????????????????????????????????弰????????????

?????????????????????絼??????????????????2??3??4??5??6?Σ?????1??7??8??9??10?Σ?????2??11??12??13??14?Ρ?

3???????????

3.1???????У??

?????????????????????ε???????С??35kg??????????????????????????????????????????????

    v=KK??(Q^1/3??????R)²=50??0.5(35^1/3??20)²=0.67cm??s<5.Ocm??s??

???????????????ζ????????????????????????Χ?????????????????????????????????????????

3.2??????У??

??????????????Χ??????????????????????????п???????????????У???

??У?????????K_t=(1??3)??3.39????=-1.66??????????????????M=3000t??H=10m???????????g=9.8m??s?????????????=10MPa??????????????????????30m??????ó???????????v=1.184cm??s??С???????5?????????????????????????2cm??s??????????????O.3m??????????????????????????????????Χ???????1???????????????????????????????

3.3??????

(1)??????????????β??????????????????????????????????????????????????????????????

?????Ч??????????????????????????????????????????λ???з????????????????????????????????????????????????????????

(2)??????????????????????????????????????????????????Ч?????????????????????????Χ??????????????????????????Χ???????????????С??O.3m????????????С?????????????????????

3.4???????

?????Ч????????????????????????????????????????λ??????????????????????????????????????????????????????λ??????????????????????????????????λ???????????????????????1???2??????????????????????????

3.5???????Χ

???α???????????????Χ????????????100m??????????60m??????????(????)?15m??????α?????????Χ??????????????????????????????Χ????????????20min?????????????????????????????????????????20min????????????????????????????????????????????????????????15min??????????ж?????

3.6???????????????????

(1)??????????????????????????????????????????????????????????Ч?????á???????????????????????????е?????????????????????????????????????????????????

(2)???????????????????????α?????????Χ????С????????????????????????

4????Ч???????

(1)???ζ?????Ч?????????????????????????????????????????????????Χ??????????????????????????????????????Χ????????????????????????????????????????????????????????????????????????????

(2)???????????????????????????屬??Ч????????????????????

???????????????????????????????????????????????????????

??????????????????·??????????????·??????????????γ????

????????????????????????????????????????????Ч????????????????????????

???????????????60??