贵龙大道挖方控制爆破方案(完整)

附件：贵龙大道一标段外环路路基工程石方爆破装药量计算1.工程概况1.1概况贵阳市贵龙大道（贵阳段）道路工程位于贵阳市南明区小碧乡，工程起点接贵龙大道龙里段，向西穿过猫垌村、秦棋村地界，下穿绕城高速铁路和绕城公路，道路继续向西接东站路延伸段。爆区桩号为K2+790~K2+910桩号段。全长约120m，本次爆区宽度30米，本次台阶高度约为8米，本次爆破量约2.5万方。爆破区为三叠系下统安顺组（T1a）:灰色薄层～中厚层石灰岩，岩层产状N10～15°W/NE∠15～20°。大尖坡正断层发育，断层产状N19°E，NW∠65°，延伸3.8km,与爆区左、右边坡斜交。1.2爆区周围的环境该段路基距离居民住宅最近距离30米、距离猫垌村自来水塔35米、距离输油管道最近距离为45m距离小碧乡蓄水水库175米。爆区施工平面图如下：爆区完成后照片1.3拟定爆破方案经现场实地勘察，采用深孔松动爆破方案。为严格控制振动波对周围民房及输油管道的影响，严格控制单孔装药量外，采用微差爆破方式进行一次起爆量控制。为防止飞石对村民和民房的伤害，用炮皮对爆区全覆盖。为防止地震波地表传播震伤水塔，在距水塔20米处范围处开挖宽2米、深4米的减震沟。2．爆区孔眼布根据爆破设计，以K0+820～K0+860为例，采用手持式凿岩机作业，孔径取40mm，具体分布方式见下图：3.爆破参数及药量计算式3.1理论用量计算采用手持式凿岩机作业，孔径取40mm。每个分层开挖高度为1.2m，浅孔松动爆破参数的选取：①底盘抵抗线（W）可采用下式计算：W=（0.4～1.0）H式中：H—分层（台阶）高度，m计算得：W=0.28m～1.2m根据经验和实践，取W=0.8m②炮孔深度和超深L=H+hh=（0.10～0.15）H式中：L——炮孔深度，m；H——分层（台阶）高度，m；h——超深，m。计算的：h=(0.12～0.18)m；取h=0.15mL=1.2+0.15=1.35m③孔距（a）和排距（b）孔距按下式计算：a=（1.0～2.0）W=0.8m～1.6m,取a=1。排距按下式计算：b=（0.8～1.0）W=0.6m～0.8m，取b=0.7。④单位炸药消耗量（q）该工程岩石坚固性系数中风化岩，根据经验，浅孔松动爆破时其单位炸药消耗量q可取0.35kg/m3。⑤单孔装药量Q=qabH=0.35×1×0.7×1.2=0.294kg，取Q=0.25kg炸药选用直径为32mm的乳化炸药药卷，每支长20cm，重200g，则装下250g的炸药，其装药长度为0.25m，炮孔深度为1.35m，则能够供填塞部分长度为1.1m。4.实际用药量计算为了防止对周围环境的破坏，尽量少装药，只采取松动的方式，并根据当地爆破情况，采用乳化炸药进行爆破，单位药量q可0.35kg/m3。采用10米长脚线的毫秒雷管单孔装药量:Q=qabH式中：H——炮眼深度，根据钻好的眼实际量测序号孔号孔径(mm)孔深(m)装药节数雷管数量单孔装药量（g)11-1401.362125021-2401.412125031-3401.362125041-4401.412125051-5401.362125061-6401.392125071-7401.402125081-8401.432125091-9401.4321250101-10401.3921250111-11401.3521250121-12401.3621250131-13401.3621250141-14401.3821250151-15401.3621250161-16401.3621250171-17401.4021250181-18401.3521250191-19401.3721250201-20401.3721250211-21401.4121250221-22401.3821250231-23401.3921250241-24401.4221250252-1401.4321250262-2401.3821250272-3401.4021250282-4401.3521250292-5401.3921250302-6401.4121250312-7401.3521250322-8401.4121250332-9401.3821250342-10401.3521250352-11401.4221250362-12401.4021250372-13401.3821250382-14401.4321250392-15401.4121250402-16401.3821250412-17401.4021250422-18401.4321250432-19401.3821250442-20401.4421250452-21401.3821250462-22401.4421250472-23401.4221250482-24401.3821250493-1401.4421250503-2401.3921250513-3401.4321250523-4401.4321250533-5401.4021250543-6401.3921250553-7401.4421250563-8401.4121250573-9401.3721250583-10401.4221250593-11401.3821250603-12401.4121250613-13401.4321250623-14401.3821250633-15401.3521250643-16401.3821250653-17401.3721250663-18401.3721250673-19401.4321250683-20401.3621250693-21401.3721250703-22401.4121250713-23401.4221250723-24401.4221250733-25401.4021250743-26401.3521250753-27401.4121250763-28401.3721250773-29401.4021250783-30401.4221250793-31401.4321250803-32401.4021250813-33401.3721250823-34401.4421250833-35401.3621250843-36401.3721250853-37401.4321250863-38401.3921250873-39401.4221250883-40401.4321250893-41401.4121250903-42401.3921250913-43401.3721250923-44401.4321250933-45401.4321250943-46401.3921250953-47401.3621250963-48401.3621250974-1401.4421250984-2401.3521250994-3401.37212501004-4401.42212501014-5401.40212501024-6401.40212501034-7401.38212501044-8401.37212501054-9401.43212501064-10401.35212501074-11401.38212501084-12401.36212501094-13401.43212501104-14401.39212501114-15401.39212501124-16401.44212501134-17401.36212501144-18401.35212501154-19401.41212501164-20401.42212501174-21401.40212501184-22401.42212501194-23401.38212501204-24401.43212501214-25401.39212501224-26401.39212501234-27401.40212501244-28401.43212501254-29401.38212501264-30401.39212501274-31401.44212501284-32401.44212501294-33401.37212501304-34401.42212501314-35401.44212501324-36401.44212501334-37401.39212501344-38401.41212501354-39401.43212501364-40401.44212501374-41401.35212501384-42401.36212501394-43401.39212501404-44401.38212501414-45401.35212501424-46401.35212501434-47401.39212501444-48401.35212501454-1401.40212501464-2401.39212501474-3401.43212501484-4401.37212501494-5401.41212501504-6401.35212501514-7401.44212501524-8401.40212501534-9401.36212501544-10401.37212501554-11401.38212501564-12401.41212501574-13401.42212501584-14401.35212501594-15401.39212501604-16401.41212501614-17401.35212501624-18401.42212501634-19401.39212501644-20401.43212501654-21401.43212501664-22401.43212501674-23401.35212501684-24401.39212501694-25401.41212501704-26401.41212501714-27401.40212501724-28401.37212501734-29401.36212501744-30401.40212501754-31401.36212501764-32401.35212501774-33401.38212501784-34401.43212501794-35401.43212501804-36401.39212501814-37401.41212501824-38401.35212501834-39401.40212501844-40401.40212501854-41401.35212501864-42401.39212501874-43401.39212501884-44401.44212501894-45401.38212501904-46401.39212501914-47401.43212501924-48401.42212501934-1401.35212501944-2401.41212501954-3401.39212501964-4401.38212501974-5401.36212501984-6401.44212501994-7401.40212502004-8401.44212502014-9401.37212502024-10401.37212502034-11401.43212502044-12401.41212502054-13401.35212502064-14401.43212502074-15401.39212502084-16401.37212502094-17401.36212502104-18401.42212502114-19401.39212502124-20401.36212502134-21401.39212502144-22401.42212502154-23401.39212502164-24401.44212502174-25401.44212502184-26401.4221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