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- Keywords extremely thick loose bed;upper limit of mining;aquiferous crevice zone;safety coal pillar; 巨厚松散层;开采上限;导水裂缝带;安全煤柱;
- extremely thick loose bed 巨厚松散层
- Research on Safely Mining Key Technology of Coalbed in Zone of Weathering and Oxidation under Thick Loose Bed 厚松散层下风氧化带内煤层安全开采关键技术的研究
- TESTING STUDY ON MINING OF WATERPROOF COAL PILLARS IN THICK LOOSE BED AND THICK COAL SEAM UNDER ULTRATHIN OVERLYING STRATA 厚松散层及超薄覆岩厚煤层防水煤柱开采试验研究
- UDEC simulation of the water-pouring probability in exploiting waterproof coal pillars under the conditions of thick loose bed and ultrathin overlying strata UDEC模拟厚松散层及超薄覆岩条件下开采防水煤柱覆岩突水可能性
- Based on measured rock pressure and experimental data under thick watered loose bed of Wanbei mining area,dimorphism and mutation characteristics of ultrathin bedrock working face roof are discussed. 以皖北矿区厚含水松散层下超薄基岩开采工作面实测矿压资料与实验数据为依据,论述了超薄基岩工作面顶板的风化变异特征。
- Based on measured rock pressure and experimental data under thick watered loose bed of Wanbei mining area, dimorphism and mutation characteristics of ultrathin bedrock working face roof are discussed. 摘要以皖北矿区厚含水松散层下超薄基岩开采工作面实测矿压资料与实验数据为依据，论述了超薄基岩工作面顶板的风化变异特征。
- The safety system of extremely thick coal seam is built and the extremely thick coal seam with coal bumping tendency in Qianqiu coal mine is extr... 在此基础上建立了适合义煤千秋矿巨厚煤层冲击地压防治的安全开采体系;成功地进行了巨厚煤层的综放开采;从而为有冲击倾向巨厚煤层的安全开采提供了成功范例.
- Into the winter, put on thick winter clothes that did not lose weight, what a thing, thick loose clothing under the Dunan turn a blind eye to small? 进入冬季，以为穿上厚厚的冬装就没减肥什么事儿了，对宽松厚实衣服下的小肚腩视而不见？
- Analysis on plastic wriggle, reduction of well diameter, bit burying, bit jamming and being difficult for casing etc. under complicated pressure system and high pressure of the extremely thick layer. 分析了巨厚盐膏层在复杂的压力系统及高温高压下发生塑性蠕动、井径缩小,易发生埋钻、卡钻、下套管困难等严重复杂情况;
- The extreme effects of sand mining on local deformation of riverbed and evolution of river stretch in typical river sections such as straight river section, river bend and river fork are experimentally studied in micro-scale loose bed hydraulic model. 摘要采用微尺度动床河工模型试验的方法研究了在顺直、弯道与分汊等典型河道不同部位进行大规模采砂对河床局部变形及对河段变形的极限影响。
- thick and extremely thick ore -body 厚大极厚大矿体
- steeply inclined and extremely thick coal seam 急倾斜特厚煤层
- steep-inclined and extremely thick coal seam 急倾斜特厚煤层
- The effect is not apparently when using methods of large-diameter barrels,cementation and so forth during branching drilling in Cenozoic loose beds. 采用粗径岩心管、水泥封闭等方法在新生界松散层中人为叉孔有时效果不太明显。
- Construction Technology of Freezing Holes in Extremely Thick Pebble Bed 特厚卵石层冻结孔施工技术
- My heart beat thick in the course of the interview. 在面试过程中我的心跳得厉害。
- Construction technology of supply well in loose bed 松散层供水井的施工工艺
- Bind the rope fast lest it should come loose. 把绳子绑牢，免得它松脱。
- The brook warbled over its rocky bed. 小溪潺潺流过多石的河床。
