Natural sinkholes generally form when heavy, water-saturated soil causes the roof of an underground limestone cavity to collapse, or when water widens a natural fracture in limestone bedrock.
一般自然灰岩坑形成机理是由于有份量的水饱和土导致地下石灰岩洞顶层坍塌，或者由于水加宽了石灰岩床的天然裂缝而导致。
The main factors influencing the gas preservation condition includes the fault amplitude, fault fragmented intervals, fault surface dip, and the position of fracture cavity system in the faulted zone.
大断裂影响缝洞系统保存条件的主要因素包括：大断裂断距、断层上消失层位、断面倾角、盖层厚度以及缝洞系统所处断裂带位置等。
The result suggests that the cavity beneath cement concrete pavement slabs and the vehicle overloading are the important factors in incipient fracture of cement concrete pavement slabs.
结果表明，水泥混凝土路面板下脱空、超载车辆和重载车辆是造成水泥混凝土路面板早期断裂的重要因素。
The seismic, drilling and logging data shows that types of the reservoirs can be divided into crust and inside hill, the reservoir space are mainly fracture and solution cavity.
地震、钻井和成像测井资料的研究表明，潜山带油气藏类型主要有潜山风化壳型和内幕型两类，储集空间以裂缝、溶洞为主。
Method To rehabilitate orbit crack fracture by intranasal endoscopic technique passing through the approaches of nasal cavity or maxillary sinus.
方法：用鼻内窥镜经筛或经上颌窦治疗眶爆裂骨折。
Root canal treatment and finished tooth, lost in the pulp cavity nutrition supplies such as nerves, blood vessels, lymphatic, makes itself become more brittle fracture of teeth.
且做完根管治疗的牙齿，失去了牙髓腔中神经、血管、淋巴等营养供应，使得牙齿本身变得较脆易断裂。
In recent years, Proterozoic and Archaeozoic buried hill reservoirs have been explored and developed in Liaohe Oilfield, but it is a problem to interpret these fracture-cavity reservoirs.
近年来，辽河油田元古界、太古界古潜山油气藏得到了比较好的勘探与开发，但对这些缝洞性储层的解释一直是一个难题。
Conclusion Finally, the examples for predicting Large Cavity and fracture systems in Carbonate Reservoir show that this approach is effective.
结论：以缝洞型碳酸盐岩溶洞实例结果说明方法的有效性。
Conclusion Finally, the examples for predicting Large Cavity and fracture systems in Carbonate Reservoir show that this approach is effective.
结论：以缝洞型碳酸盐岩溶洞实例结果说明方法的有效性。
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