The authors considered that the borehole flushing fluid method is a rather accurate method to get the "3 zones" data at present,according to fluid leakage and overlying rock fracturing condition to divide "3 zones".
认为钻孔冲洗液法是目前煤矿取得"三带"数据较为精确的方法,根据钻孔冲洗液漏失量的大小及覆岩的开裂情况,对"三带"进行了划分:在钻进中覆岩一般开裂,冲洗液漏失量小于1L/(s·m)为弯曲带;钻进中覆岩严重开裂,冲洗液漏失量大于1。
Analysis of irrigation and drainage by skull perforation for treating chronic subdural hematomas
慢性硬膜下血肿钻孔冲洗引流治疗的探讨
Analysis of Surgical Complications Caused by Chronic Subdural Hematomas with Burr Holes Irrigation and Drainage
钻孔冲洗引流治疗慢性硬脑膜下血肿手术并发症的分析
Clinical analysis of 64 cases with chronic subdural hematoma treated by operation with drilling holes irrigation and drainage
钻孔冲洗常压引流加负压引流治疗慢性硬膜下血肿64例临床分析
Clinical analysis of 256 cases of slow subdural hematoma in usual atmospheric pressure by using BHID.;
常压下颅骨钻孔冲洗引流术治疗外伤性慢性硬膜下血肿256例临床分析
Clinical Investigation of Double-Cavity Cannula Irrigation and Drainage for Treatment of Bilateral Chronic Subdural Hematoma
钻孔后双腔管冲洗引流治疗双侧慢性硬脑膜下血肿
rotary wash-boring equipment
旋转式水冲钻孔设备
Clogged or cave-in of the hole, can lead to a stuck drill. It is best therefore, to cleans the hole regular intervals, by carrying out air-blowing with the rock drill.
因为堵块和空穴都可能导致卡钻，因此应定期采用冲击器强吹，定期清洗孔底。
Study on the Mechanism of Treatment of Ganfh with Drilling and Decompression, Placement of Drainage Tube and Flushing with Huo Gu Injection;
股骨头钻孔减压置管活骨注射液冲洗治疗激素性股骨头坏死机理研究
Hole Clearing by air-lift reverse circulation method in bored piles
冲(钻)孔灌注桩气举反循环清孔工艺
Analysis and Treatment of an Accident of Blocking Bore of Excavated Hole Driven Cast-in-Place Pile by Percussion Drill
一起冲击钻成孔灌注桩卡钻事故的分析与处理
Supporting the use of impact drilling electric drill. Drilling, hole spacing with hole depth should meet the design requirements.
（1）钻孔使用配套冲击电钻.钻孔时,孔洞间距与孔洞深度应满足设计要求.
Downhole drill hammers and drills
GB/T13344-1992潜孔冲击器和钻头
Construction Method and Technical Measurement of Drilling (Wash) Bore Concrete Piles
钻(冲)孔混凝土灌注桩施工方法与措施
On the Mud Property of Bored or Punch Piles
钻(冲)孔灌注桩泥浆性能指标及应用
Key Construction Technology and Problem Treatment on Impact Bored Pile
冲击钻孔灌注桩施工要点及问题处理
MOMENTARILY PULL AND THEN RELEASE THE WASH BUTTON ON THE STALK SWITCH.
拉一下，然后释放开关孔上的冲洗按纽。
FLUSHING LIQUID WITHOUT CLAY AND DRILLING FLUID ADDITIVE MADE FROM ELM BARK
用榆树皮制无固相冲洗液和钻井液添加剂
Penetration Mechanism of DTH Percussion Compact Drilling and Experimental Research on Compact Bit;
潜孔锤冲击挤密钻进机理及挤密钻头的设计与实验研究