Key Technique of Gas Sucking of "Three-Soft" Coal Bed and Its Application
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Tectonic control on gas geological hazard in Ludian gliding structure
Against the particularity of problem of gas bursting of Ⅱ_1 coal seam in Ludian gliding structure in west Henan,through a large amount of work of field surveys and interior research,and viewed from the basic theories of structural petrology,discussed some characteristics of mining gas hazard such as image,mechanism and tectonic control process.Research results show that different conformation mode of tectonite roof result in the difference of preservation condition of gas,intense pressing process of structural stress in the front of gliding structure result in mine gas outburst,and control on No.2 gas source in tectonite roof is the best means by which the gas problem can be perfectly solved in gliding structure area.
Bone changes in tuberous sclerosis mimicking metastases.
Sclerotic and lytic bone changes of tuberous sclerosis (TS) can mimic bone metastases. We report a case of bone metastases from bronchogenic carcinoma in a patient with TS bone changes. Bone scintigraphy and magnetic resonance imaging are useful in distinguishing the TS bone lesions from bone metastases.