(2)Hole Arrangement Form2、Hole distribution of all cutting excavation既有铁路边坡上层边坡预裂孔预裂孔下层doubletrack expansivecuttingsingle line all cutting by layer2016/11/9Chapter8BlastingforRockand
2016/11/9 Chapter 8 Blasting for Rock and Soil Hole Arrangement Form （2） double track expansive cutting single line all cutting by layer 2、Hole distribution of all cutting excavation
Blasting Parameters(6).Unit explosive(1).Hole diameter1) Accordingtoconsumptionthe safetyconditions ofdrilling operation2)AccordingBlastingtothe(5),(2). Holecalculation ofParametersStemmingdepth andbenchheightlengthsubdrillingand holediameter3)Accordingto(3).Toeburden(4).Holethe condition ofspacing andcharge per holerow spacing2016/11/9Chapter8BlastingforRockand
2016/11/9 Chapter 8 Blasting for Rock and Soil Blasting Parameters (1). Hole diameter (6). Unit explosive consumption (2). Hole depth and subdrilling (3). Toe burden (5). Stemming length (4). Hole spacing and row spacing Blasting Parameters 1）According to the safety conditions of drilling operation 2）According to the calculation of bench height and hole diameter 3）According to the condition of charge per hole
Charging StructureBase spacing chargeColumn chargeDivided chargeDivided chargeHBase spacingchargeMixed charge1-BlockingCharging1-Blockingstructure2-Explosive2—Explosive3-Air3—Air2016/11/9Chapter8BlastingforRockand
2016/11/9 Chapter 8 Blasting for Rock and Soil Charging Structure Divided charge Base spacing charge Mixed charge Column charge 1 －Blocking 2－ Explosive 3 － Air Divided charge Base spacing charge Charging structure 1 －Blocking 2－ Explosive 3 － Air
[1]Detonating Sequence(1)Roworderdetonation(2)Rowparity-OrderDetonation(3)Wave-OrderDetonation（4）V-shapedorderdetonation(a)（5）TrapezoidalOrderDetonation（6）Diagonalorderdetonation（7)Radial OrderDetonation(b)（8）CombinedOrderDetonationRow order detonation102016/11/9Chapter8BlastingforRockand
2016/11/9 Chapter 8 Blasting for Rock and Soil 10 『1』 Row order detonation （1） Row order detonation （2） Row parity-Order Detonation （3） Wave-Order Detonation （4） V-shaped order detonation （5） Trapezoidal Order Detonation （6） Diagonal order detonation （7） Radial Order Detonation （8） Combined Order Detonation Detonating Sequence