环嵩山地区二里头时期聚落石器钻孔工艺研究

钻孔技术的应用在环嵩山地区二里头时期聚落石器加工制造业中具有普遍性与稳定性。铲、刀是当时主要的钻孔器类,两者的制孔工艺多为管钻和琢钻。钻孔工艺的流程方法依工艺不同而有所差异。管钻工艺多应用在石器打磨之后,而琢钻工艺则在磨光修形等工序之前进行。二里头时期经历了制孔技术的更迭,由早期多种钻孔工艺的广泛应用,发展到晚期琢钻占据主流地位。究其原因,可能与钻孔器类的变化、钻具选择的不同、钻孔工艺的专用性以及管钻工艺的受控等因素有关。

Drillhole high-pressure packer permeability test for underground powerhouse in Pushihe pumped storage hydro-plant

Usually the water head of the pumped storage hydro-plant is high, generally up to 400-500 m, therefore the rock mass under the high-pressure bifurcation pipe have to bear as high as millions Pascal water pressure, in according with the requirements of high water head pumped storage hydro-plant should be 1.2 times of the water head special high-pressure packer permeability test compared with normal to test the permeability of rock and rock cleavage pressure value. The test results on the choice of design options often play a decisive role. Based on the engineering practice, the authors studied the drillhole high-pressure packer permeability test in the pumped storage hydro-plant's underground powerhouse, by the analysis of test results, this article offers a demonstration of the deformation of rock fracture witch under building in the condition of high-pressure water head, it provides a more detailed engineering geological background.

史前玉器大型钻孔技术实验研究

本文探讨对象为玉、石器大型钻孔技术,此技术很有可能与辘轳轴承器的发明有关,本文将通过实验考古等方法,复原古代钻孔技术所使用的轮轴机械及加工动力系统。